uganda standards template · 2018-07-11 · us iso 1514, paints and varnishes — standard panels...

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DRAFT UGANDA STANDARD

DUS 745:2018

Second Edition 2018-mm-dd

Reference number DUS: 2018

© UNBS 2018

Road and runway marking paints — solvent-borne and water-borne paints— Specification

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DUS 745: 2018

ii © UNBS 2018 – All rights reserved

Compliance with this standard does not, of itself confer immunity from legal obligations

A Uganda Standard does not purport to include all necessary provisions of a contract. Users are responsible for its correct application

© UNBS yyyy

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any form or by any means, electronic or mechanical, including photocopying and microfilm, without prior written permission from UNBS.

Requests for permission to reproduce this document should be addressed to

The Executive Director Uganda National Bureau of Standards P.O. Box 6329 Kampala Uganda Tel: +256 414 333 250/1/2/3 Fax: +256 414 286 123 E-mail: [email protected] Web: www.unbs.go.ug

mailto:[email protected]

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DUS 745: 2018

© UNBS 2018 – All rights reserved iii

Contents Page

Foreword ............................................................................................................................................................. v

1 Scope ...................................................................................................................................................... 1

2 Normative reference .............................................................................................................................. 1

3 Terms and definitions ........................................................................................................................... 2

4 Types ...................................................................................................................................................... 3

5 Requirements ......................................................................................................................................... 3 5.1 General requirements ........................................................................................................................... 3 5.1.1 Condition in the container .................................................................................................................... 3 5.1.2 Storage stability ..................................................................................................................................... 3 5.1.3 Viscosity ................................................................................................................................................. 3 5.1.4 Application properties .......................................................................................................................... 3 5.1.5 Resistance to sagging (type 1, type 2 and type 3 paints) ................................................................. 4 5.1.6 Hiding power .......................................................................................................................................... 4 5.1.7 Resistance to bleeding ......................................................................................................................... 4 5.1.8 Resistance to artificial weathering ...................................................................................................... 4 5.1.9 Resistance to abrasion (type 1, type 2 and type 3 paints ................................................................. 4 5.1.10 Alkali resistance of paints for concrete surfaces .............................................................................. 5 5.1.11 Skid resistance (type 4 paints) ............................................................................................................. 5 5.1.12 Resistance to traffic wear ..................................................................................................................... 5 5.1.13 85° specular gloss ................................................................................................................................. 5 5.1.14 Luminance factor (reflectivity) ............................................................................................................. 5 5.1.15 glass beads ............................................................................................................................................ 5 5.2 Colour ..................................................................................................................................................... 5 5.2.1 Red and yellow paint ............................................................................................................................. 5 5.2.2 Obliterating paint ................................................................................................................................... 6 5.3 Specific requirements ........................................................................................................................... 6

6 Packaging and Labelling ...................................................................................................................... 6 6.1 Packaging ............................................................................................................................................... 6 6.2 Labelling ................................................................................................................................................. 7

7 Sampling ................................................................................................................................................ 7

Annex A (normative) Resistance to sagging .................................................................................................. 8 A.1 Apparatus ............................................................................................................................................... 8 A.1.1 Float-glass panel, of superficial size at least 100 mm x 300 mm, and prepared in

accordance with ISO 1514. ................................................................................................................... 8 A.1.2 Sag index applicator that is capable of applying a series of parallel stripes of paint, of

width 7 mm and at intervals of 6 mm, of various thicknesses. The applicator should have gap clearance that range from 125 μm to 875 μm, steps of 125 μm. ............................................... 8

A.2 Procedure ............................................................................................................................................... 8

Annex B (normative) Alkali resistance ............................................................................................................ 9 B.1 Apparatus ............................................................................................................................................... 9 B.1.1 Fibre-cement panels, of size 150 mm x 70 mm x 5 mm, and prepared as in ISO 1514 .................. 9 B.1.2 Test solution, 10 % by mass of sodium hydroxide in distilled water .............................................. 9 B.2 Procedure ............................................................................................................................................... 9

Annex C (normative) Resistance to artificial weathering ............................................................................ 10 C.1 Apparatus ............................................................................................................................................. 10 C.1.1 Aluminium panels, of size 150 mm x 70 mm, and solvent -cleaned in accordance with ISO

1514 ....................................................................................................................................................... 10

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iv © UNBS 2018 – All rights reserved

C.1.2 Paint applicator that has a gap clearance of 400 μm ...................................................................... 10 C.1.3 Artificial weathering apparatus, comprising the following: ........................................................... 10 C.2 Test specimens ................................................................................................................................... 10 D.3 Procedure ............................................................................................................................................ 10

Bibliography ..................................................................................................................................................... 11

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DUS 745: 2018

© UNBS 2018 – All rights reserved v

Foreword

Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Trade, Industry and Cooperatives established under Cap 327, of the Laws of Uganda, as amended. UNBS is mandated to co-ordinate the elaboration of standards and is

(a) a member of International Organisation for Standardisation (ISO) and

(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and

(c) the National Enquiry Point on TBT Agreement of the World Trade Organisation (WTO).

The work of preparing Uganda Standards is carried out through Technical Committees. A Technical Committee is established to deliberate on standards in a given field or area and consists of key stakeholders including government, academia, consumer groups, private sector and other interested parties.

Draft Uganda Standards adopted by the Technical Committee are widely circulated to stakeholders and the general public for comments. The committee reviews the comments before recommending the draft standards for approval and declaration as Uganda Standards by the National Standards Council.

The committee responsible for this document is Technical Committee UNBS/TC5/SC2, Paints, Varnishes and related products.

This DUS 745:2018; Second edition cancels and replaces the first editions US 745-1:2007 Road and runway marking paints — Specification — Part 1: Single pack solvent borne and water-borne paints and US 745-2:2007, Road and runway marking paints — Specification — Part 2: Single pack water borne paints which have been technically revised.

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DRAFT UGANDA STANDARD DUS 745: 2018

© UNBS 2018 – All rights reserved 1

Road and runway marking paints — solvent-borne and water-borne paints— Specification

1 Scope

This Draft Uganda Standard specifies requirements, methods of test and sampling for conventional solvent-borne and water-borne paints suitable for permanently marking traffic-bearing bituminous or concrete road and runway surfaces. The paint shall be reflectoried unless otherwise specified. It makes provision for white, yellow and red

2 Normative reference

The following referenced documents referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

DUS 1976, Road Marking glass spheres (beads) — Specification

DUS 1992, Test method for no-pick-up time of traffic paint

DUS 1993, Abrasion resistance of organic coatings by Taber Abrader

DUS 1994: Standard Practice for calculation of color tolerances and color differences from instrumentally measured color coordinates -

DUS 1995; Standard Test Method for Consistency of Paints Measuring Krebs Unit (KU) Viscosity Using a Stormer-Type Viscometer-

DUS 1997 Standard guide for application and evaluation of brush and roller applied paint films-

DUS 1998 Standard test method for measuring the skid resistance of Standard test method for measuring the skid resistance of Pavements and Other Trafficked Surfaces Using a Continuous Reading, Fixed-Slip Technique

DUS1999 Standard Test Method for Measurement of Retroreflective Pavement Marking Materials with CEN-Prescribed Geometry Using a Portable Retroreflectometer-

DUS 2000 Standard Test Method for Hiding Power of Paints by Reflectometry

DUS 2001 Standard Test Method For Density of Liquid Coatings, Inks, and Related Products

DUS 2002 Standard Test Method for Volatile Content of Coatings

DUS 2003 -Standard Test Method for Fineness of Dispersion of Pigment-Vehicle Systems by Hegman-Type Gage

DUS 2004 Standard Practice for Calculating Yellowness and Whiteness Indices from Instrumentally Measured Color Coordinates

DUS 2005 Standard Test Method for Low Concentrations of Lead, Cadmium, and Cobalt in Paint by Atomic Absorption Spectroscopy

DUS 2006 Standard Test Method for Low Concentrations of Chromium in Paint by Atomic Absorption Spectroscopy

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2 © UNBS 2018 – All rights reserved

DUS 2007 Standard Practice for Determination of Degree of Bleeding of Traffic Paint

US ISO 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling

US ISO 1514, Paints and varnishes — Standard panels for testing

US ISO 1513, Paints and varnishes — Examination and preparation of samples for testing

US ISO 2813, Paints and varnishes — Measurement of specular gloss of non-metallic paint films at 20º, 60º and 85º

US ISO 3270, Paints and varnishes and their raw materials — Temperatures and humidities of conditioning and testing

US ISO 2814, Paints and varnishes — Comparison of contrast ratio (hiding power) of paints of the same type and colour

BS 381 C, Specification for colours for identification, coding and special purposes

3 Terms and definitions

For the purposes of this document, the terms and definitions given ISO 4618:2014 and the following apply ISO

and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at http://www.iso.org/obp

3.1 defective test sample or a container of the paint that fails in one or more respects to comply with the relevant requirements of this standard

3.2 lot quantity of paint in containers that bear the same batch identification, from one manufacturer and submitted at any one time for inspection and testing

3.3 reflectivity reflectance of a paint film of such thickness that any further increase in film thickness does not give further change in the reflectance

3.4 retro-reflective paints paints that have an enhanced night-time visibility, achieved by the incorporation of suitable glass beads

3.5 standard atmosphere atmosphere contained in a test and conditioning enclosure, and that complies with the requirements of US ISO 3270.

3.5 bleeding is defined as the relative condition of discoloration manifested in traffic paint when applied to tar or asphaltic roads.

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DUS 745: 2018


4 Types

The paints shall be of the following types, as required:

a) type 1: road marking paint for machine spray application: quick-drying paint for machine spray application to concrete or bituminous (or both) road/runway surfaces;

b) type 2: road-marking paint for general application: quick-drying paint for application to concrete or bituminous (or both) road-runway surfaces;

c) type 3: water-borne road-marking paint: water-borne paint suitable for application to concrete or bituminous or both)road/runway surfaces; and

d) type 4: skid-resistant road-marking paint: skid-resistant paint for application to concrete or bituminous (or both) road/runway surfaces.

NOTE 1 Types 1,2 and 3 may, if so required, also be supplied as retro-reflective paints or as suitable for 'premix' or

'drop on 'bead

NOTE 2 Retro-reflective paints with 'premix' beads have to conform to all the requirements of this Uganda Standard,

except for wear resistance, before the addition of the beads.

5 Requirements

5.1 General requirements

5.1.1 Condition in the container

When sampled in accordance with US ISO 15528 and prepared and examined in accordance with US ISO 1513, the paint shall show no evidence of; biological growth, corrosion of the container, livering or hard settlement, and shall be free from lumps, foreign material or surface skins that cannot be re-dissolved. Upon hand mixing the paint shall be returned to a smooth and homogeneous consistency, which is free from; gel structures, persistent foam or air bubbles.

5.1.2 Storage stability

After storage up to 6 months from the date of packaging in a 500 mL container under laboratory ambient conditions, the pigment shall be readily dispersed and viscosity of the paint shall not have changed more than 5 KU from that of the freshly delivered paint. The paint shall still comply with all the requirements of 5.1 after the period of 6 months.

5.1.3 Viscosity

The viscosity of the paint shall meet the requirement specified in table 1 when determined in accordance with DUS 1995.

5.1.4 Application properties

5.1.4.1 Machine spray application (type 1 paints)

When applied with machine spray equipment approved by the manufacturer, the paint shall spray without spattering and shall be capable of being applied as a uniform finish at the spreading rate and its method of determination, as agreed upon

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5.1.4.2 Brush application (type 2, type 3 and type 4 paints)

When tested in accordance with DUS 1997 on a fibre-cement panel of size 300 mm x 300 mm, the paint shall brush on without excessive drag, shall flow without leaving excessive brush marks, and shall join smoothly. The resultant dry film shall have a uniform appearance.

5.1.4.3 Roller application (type 2 and type 3 paints)

When tested in accordance with DUS 1997 on a fibre-cement panel of size 300 mm x 300 mm, the paint shall roll on smoothly without the formation of foam, and shall join smoothly. The resultant dry film shall have a uniform appearance.

5.1.4.4 Spray application (type 2 and type 3 paints)

When thinned in accordance with the manufacturer's directions for use, the paint shall be capable of being applied by pressure-feed or airless-spray equipment, without spattering. When the paint is sprayed onto a float glass panel of size 100 mm x 300 mm and dried, the dry film shall have a uniform appearance.

5.1.5 Resistance to sagging (type 1, type 2 and type 3 paints)

When the paint is tested in accordance with annex A, the width of any stripe applied with an applicator that has a gap clearance of 500 μm or less shall not show an increase that exceeds 1.75 mm.

NOTE If the manufacturer does not supply any details, this test should be conducted at wet film thickness of 380 μm ± 10 μm.

5.1.6 Hiding power

When applied by means of an applicator with a gap clearance of 200 μm and tested in accordance with DUS 2000 white paint shall have a contrast ratio of at least 0.95 and all other paints shall have a contrast ratio of at least 0.90.

5.1.7 Resistance to bleeding

When determined in accordance with DUS 2007, the difference between the reflectance of the paint applied over the taped portion and the reflectance of the paint applied over the untapped portion of the bitumen panel shall not exceed three units for white paint and one unit for yellow and red paint.

5.1.8 Resistance to artificial weathering

When determined in accordance with annex C, the luminance factor (see 5.1.14) of the paint on an exposed panel shall not differ by more than three units from the luminance factor of the paint on an unexposed panel.

5.1.9 Resistance to abrasion (type 1, type 2 and type 3 paints

When the paint is tested in accordance with DUS 1993, using CS 17 abrading wheels, a mass of 500 g and a

test duration of 1 000 cycles, the loss in mass (L) shall not exceed 120 g/m2 when calculated using the

following formula:

22

1000000

RWR

XBAL

where A is the mass, in grams to the nearest 0.1 milligram of the test specimen before abrasion;

B is the mass, in grams to the nearest 0.1 milligram, of the test specimen after abrasion;

R is the radius, in millimetres, measured from the centre of the test specimen to the inside edge of the abrading wheel; and,

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W is the width, in millimetres, of the abrading wheel.

5.1.10 Alkali resistance of paints for concrete surfaces

When tested in accordance with annex B, a paint marked as suitable for application to concrete surfaces [see 6.2(c)] shall not be removed from the tested panel, either partially or completely, when the paint is wiped dry with the paper towel.

5.1.11 Skid resistance (type 4 paints)

When the paint is applied and tested in accordance with 5.6 and DUS 1998, the coating shall have a wet skid resistance of at least 45 SRT units.

5.1.12 Resistance to traffic wear

5.1.12.1 Wear index

When the paint is tested in accordance with DUS 1993 after 12 months, it shall have a wear index of not more than 35.

5.1.12.2 Skid resistance (type 4 paints)

When the paint is tested in accordance with DUS 1998 after 12 months, it shall have a skid resistance of at least 40 SRT units.

5.1.12.3 Retro-reflectivity

When a paint marked as retro-reflective is tested in accordance with DUS 1999, its initial retro reflection value

shall be at least 150 mcd/m2.lx and its retro-reflection value after 12 months shall be at least 100 mcd/m

2.lx.

5.1.13 85° specular gloss

When the paint is applied (onto a glass panel) with an applicator that has a gap clearance of 250 μm, and is dried for 4 h in a standard atmosphere and tested in accordance with ISO 2813, the coating shall have a maximum 85° specular gloss of 30.

5.1.14 Luminance factor (reflectivity)

When white paint is applied with an applicator that has a gap clearance of 400 μm, and is tested in accordance with ISO 2814, the reflectivity of the paint (R

w) shall be at least 80 %.

5.1.15 Glass beads

When tested in accordance with DUS 1976, the glass beads shall comply with the requirements specified there in.

5.2 Colour

5.2.1 Red and yellow paint

The standard for red paint shall be matt 537 of BS 381 C and the reference colour standard for yellow paint shall be matt 356 of BS 381C. Or yellow marking material shall be to BS Colour No. 08E51 of BS 4800 and the colour of white markings shall be to BS colour number 00E55 of BS 4800 or as specified in the current Traffic Signs Manual. The total colour difference ∆E cmc (see Note 1), determined in accordance with DUS 1994 and using the appropriate method given in 4.9, shall be small enough so that its component co-ordinates

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fall within the ellipsoid for the reference standard that is defined by the semi-axes SL. Sc and SH

and has a

unit volume tolerance (see Note 2).

NOTE 1 The notation ∆E cmc, as used here and in commercially available software, corresponds to the ∆E defined in

DUS 1994, with I = 2 and c = 1 as chosen values.

NOTE 2 When the semi-axis lengths in the formula for ∆E (see DUS 1994) equals the calculated value for ISL, cSL and

SH, the resulting ellipsoid describes a unit volume tolerance of 1.

5.2.2 Obliterating paint

Obliterating paint shall conform to matt G04 reference colour standard. When determined in accordance with 4.9, the colour difference ΔEab * shall not exceed 1.0, and the lightness difference ΔL* shall not exceed 2.0.

5.3 Specific requirements

The paint shall conform to the requirements specified in the table given below when tested in accordance with the test methods therein.

Table 1 — Specific requirements for road marking paints

Characteristic requirement Test method

Water borne Solvent borne

White Yellow Black White Yellow Black

Density, g/ml,(±0.04) 1.68 1.63 1.62 1.415 1.367 1.367 DUS 2001

Consistency, Krebs/Viscosity 78-92 78-92 78-90 70-88 70-88 70-88 DUS 1995

Non volatile content, %w/w(± 2.0)

77 76 76 72.2 71.5 71.5 DUS 2002

Non volatile in vehicle, %w/w, minimum

42 42 42 37 37 37 DUS 2002

Fineness of dispersion, Hegman-Type Gage(microns)

25.0 25.0 25.0 25.0 25.0 25.0 DUS 2003

Dry to no pick –up time without

beads, minutes, Max

10 10 10 10 10 10 DUS 1992

Dry through, Minutes, max. 30 30 30 30 30 30 DUS 1992

Yellowness index ,Max 8 - - 10 - - DUS 2004

Lead, mg/kg in dried paint, Max

20 20 20 20 20 20 DUS 2005

Chromium, mg/kg in dried paints, max

5 5 5 5 5 5 DUS 2006

6 Packaging and Labelling

6.1 Packaging

The paint shall be packed in clean, dry containers. The containers shall be strong enough to withstand normal usage, and shall be adequately sealed, to prevent leakage and contamination of the contents during normal transportation, handling and storage.

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6.2 Labelling

Each container, or a label securely fixed to the container, shall be clearly, legibly and indelibly marked with the following information:

a) the manufacturer's name and brand name of the product

b) the words 'Road-marking paint' or 'Road and runway marking paint' and, where applicable, the word 'Retroreflective' or the words 'Skid resistant';

c) where applicable, the words, 'For bituminous surfaces only' or 'For concrete and bituminous surfaces';

d) the word 'Type', followed by the number of the type (see 4);

e) the colour;

f) where applicable, the words 'Suitable for drop-on beads application';

g) the word 'Viscosity' followed by the numerical value of the viscosity (in Krebs units) and the letters 'KU' (see 4.4);

h) the drying-time ;

i) the batch identification; and

j) in the case of type 1, type 2 or type 3 paints, the directions for use, which should include all hazard warnings required by current legislation.

7 Sampling

Random sampling shall be done in accordance with US ISO 15528

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Annex A (normative)

Resistance to sagging

A.1 Apparatus

A.1.1 Float-glass panel, of superficial size at least 100 mm x 300 mm, and prepared in accordance with US ISO 1514.

A.1.2 Sag index applicator that is capable of applying a series of parallel stripes of paint, of width 7 mm and at intervals of 6 mm, of various thicknesses. The applicator should have gap clearance that range from 125 μm to 875 μm, steps of 125 μm.

A.2 Procedure

A.2.1 Use the sag index applicator to draw out the paint along the length of the panel and immediately place the panel in a vertical plane, with the paint stripes orientated horizontally and the thickest stripe at the bottom.

A.2.2 Allow the paint to dry for 1 h in a standard atmosphere and then examine the stripes for sagging. Check for compliance with 5.1.5.

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Annex B (normative)

Alkali resistance

B.1 Apparatus

B.1.1 Fibre-cement panels, of size 150 mm x 70 mm x 5 mm, and prepared as in ISO 1514

B.1.2 Test solution, 10 % by mass of sodium hydroxide in distilled water

B.2 Procedure

B.2.1 Brush two coats onto the fibre-cement panel, each at a wet film thickness of 150 μm ± 10 μm, with a drying time of 2 h between coats.

B.2.2 Dry the panel for 24 h in a standard atmosphere (see 3.5). Stand the panel upright in a glass beaker that contains the test solution, ensuring that the panel is immersed up to 75 % of its height. Leave the panel immersed in the test solution for 24 h.

B.2.3 Immediately after its removal from the test solution, rinse the panel with tap water and thoroughly dry the painted surface with a paper towel. Check for compliance with 5.1.10.

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Annex C (normative)

Resistance to artificial weathering

C.1 Apparatus

C.1.1 Aluminium panels, of size 150 mm x 70 mm, and solvent -cleaned in accordance with ISO 1514

C.1.2 Paint applicator that has a gap clearance of 400 μm

C.1.3 Artificial weathering apparatus, comprising the following:

a) an ultraviolet light source, with peak emission at 313 nm, that provides an irradiance of 18 W/m2 ± 1 W/m2 in the range 270 nm to 320 nm;

b) black panel temperature measurement;

c) an evaporator with heater control;

d) a heater with control; and

e) a timer capable of switching at intervals of 1 h between UV light and condensation cycles.

C.2 Test specimens

Prepare two test panels (see C.1.1), applying paint prepared in accordance with 4.2 and using an applicator as in C.1.2. Allow the painted test panels to dry and age in a standard atmosphere (see 3.5) for 24 h.

C.3 Procedure

The test shall be performed as follows:

a) keep one test specimen, unexposed, in a standard atmosphere (see 3.5) for 14 days;

b) expose the other test specimen in the artificial weathering apparatus (see C.1.3) to 4 h + 4 h cycles that consist of a 4 h condensation phase with a black panel temperature of 50 °C ± 3 °C and a 4 h UV light phase (see C.1.3 (a) with a black panel temperature of 60 °C ± 3 °C;

c) maintain the cyclic exposure for 14 days;

d) remove the test specimen from the artificial weathering apparatus and condition for 2 h in a standard atmosphere (see 3.5). Determine the reflectance of each test specimen in accordance with ISO 2814, and check for compliance with 5.1.8.

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Bibliography

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Certification marking

Products that conform to Uganda standards may be marked with Uganda National Bureau of Standards (UNBS) Certification Mark shown in the figure below.

The use of the UNBS Certification Mark is governed by the Standards Act, and the Regulations made thereunder. This mark can be used only by those licensed under the certification mark scheme operated by the Uganda National Bureau of Standards and in conjunction with the relevant Uganda Standard. The presence of this mark on a product or in relation to a product is an assurance that the goods comply with the requirements of that standard under a system of supervision, control and testing in accordance with the certification mark scheme of the Uganda National Bureau of Standards. UNBS marked products are continually checked by UNBS for conformity to that standard.

Further particulars of the terms and conditions of licensing may be obtained from the Director, Uganda National Bureau of Standards.

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