silicone modified inorganic-organic hybrid polymers ... · pdms or polysiloxanes silicone silicones...

Research for Tomorrow’s Technology

Unit Nos. D107 to D112, Kailash Indusrtrial Complex, Vikhroli-Hiranandani Link Road, Vikhroli (W), Mumbai – 400 079, Indiawww.nsccindia.com

Silicone Modified inorganic-organic hybrid polymers for high heat resistance and weatherable paints and

coating application

History teaches Innovation does not come about by central planning. If it did. Silicon valley would be nearer to Moscow than to San Francisco

SILICON

sp3 hybridized Si(1.8)-O(3.5) = 1.7Bond length = 1.645°A

Bond Type

Energy(kcal/mole)

C-F 105

Si-O 88-114C-O 84C-C 83Si-C 63

SILICONES - What are they?

SILICONES - What are they?

Organosilicon compoundsStructurally thought to be like ketone

Ketones Silicones =C=O =Si=O

Silanes

PDMS

or

Polysiloxanes

Silicone

SILICONES

ChlorosilanesAlkoxysilanes

Organofunctional

silanes/siloxanes

and so on

Low surface tension

Nonionic/nonpolar characteristics

Unique solubility characteristics

Hydrophobicity

Thermal stability

Oxidation resistance

Good dielectric properties

Liquid at high molecular weight

Stability over wide temp range (-70°C to 200°C)

Low flammability

Relatively inert

Nontoxic

Environmentally safe

Excellent weatherability

Properties of silicones

Organoreactive polysiloxane

NH2 - Amine neutralization, Isocyanate curing, surfactants

COOH - Amine neutralization- wetting agents, surfactants

OH – Isocyanate curing

OR- Moisture curing, Organic modification

CH=CH2, COO CH=CH2 UV Curable, reactive diluents, copolymerization

OCH2CH2O -Surfactants

H2C Si

CH3

CH3

O Si

CH3

CH3

O Si

CH3

O Si

CH3

CH3

CH2

CH3 n

R R

Nonreactive polysiloxane

Compatibility

Normally, silicones are not compatible with organic polymers. But if a larger organic group is attached to a silicone, its properties are altered, and it behaves more like an organic polymer.

Substantivity

Non-reactive silicones lack substantivity. But if an organoreactive group, such as an aminopropyl group, is attached to the silicone, the silicone becomes reactive and will form stable bonds with other organic polymers.

H3C Si

CH3

CH3

O Si

CH3

CH3

O Si

CH3

O Si

CH3

CH3

CH3

CH3 n

Polydimethylsiloxane or Silicone Oil

SiO OCH3

O

SiO OCH3

CH3

SiH2C O

O

CH3H2C

CH2HN

CH2-CH2-NH2

SiO OCH3

CH=CH2

Si

FLUIDSRESIN

EPOXY CURING AGENTUV CURABLE/CO-POLYMN

Organoreactive Silane

Si

OCH3

HC-H2C-O-H2C-H2C-H2C OCH3

OCH3

H2CO

PROTECTIVE COATINGS

Silane Organic Polymer

Ceramics

IOH

• Weatherable• Surface Energy

• Flexibility and Toughness• Processing•Functionalization

• Hardness• Thermal stability• Chemical resistance

Functional Group

Inorganic Network

Organic Network

InorganicInorganic--Organic Hybrid Organic Hybrid (Flexible Ceramic)(Flexible Ceramic)

IOH polymersIOH polymers

• Epoxy Silicone• Silicone Polyester• Silicone –PU• Acrylic Polysiloxane

• Silicone-Epoxy resin for high heat resistance anti-Corrosive Coatings

• Heat resistance up to 650 0 C (when formulated with metallic or other specialized pigments)

• Suitable for anti-corrosive heat-resistance coatings

• Suitable for single component (@1800 C/ 1hr ) and two component application (amine hardeners)

High Heat Resistant Epoxy Silicone Resin

650C for 4 hr X 5

cycle

Thermal Shock Test: 650C for 4 hr followed by immediate water quenching

• No Blistering• No Coating Peel off•ΔE = 1.02


Properties Test Method Observation

Pencil Hardness ASTM D 3363 3H

Cross cut adhesion ASTMD 3359 Method B

4B

Erichsen Impact Test

( 1.6 Kg / 60 cm )

ASTMD 2794 Face-passes Reverse-Pass

Conical Mandrel ASTMD 522 Passes 1/4 "


Scratch hardness ASTM 4060 2000 g

Erishen Cupping Test ASTM E 643 9.26 mm


ASTM D 522

ASTM D 3359

ASTM E 643

ASTM B1170 hr 200 hr

400 hr


Salt Spray Test

Heat resistance up to 350 0C (when formulated with metallic or other specialized pigments)

Suitable for designing cookware, bakeware, electrical appliances

Can be used for primer and top coats

High Heat Resistant Polyester Silicone Resin

• Gloss : 89-91

• Whiteness: 90-92

• Brightness: 93-94


350C for 4 hr X 5 Cycle

• No Blistering• No Coating Peel off• Gloss Retention: 99%• Yellowness:





5B

Erichsen Impact Test

( 1.6 Kg / 60 cm )





IS 13213: 24 hr

Silicon-PU* : Functionalized Pure Acrylic Polyol

Functionalized acrylic polyol Designed to formulate anti-graffiti polyurethane coatings Resistant to stains like tea, coffee, shoe polish, turmeric, sauce etc. Excellent flexibility and exterior durability High gloss and gloss retentionAvailable in different Tg

Applications•It can be used to formulate Anti-Graffiti clear top coats for Furniture Automotives & Public transports Railway wagon & Coaches Bus body Stadiums, platforms and other public places.

Cleaning

S.K. Ghosh et al , Progress in Organic Coatings 65 (2009) 444–449

Acrylic Polysiloxane

• Silicone Macro-monomers and specially designed functional silicone hardeners • Isocyanate-free inorganic–organic Acrylic Polysiloxane system

• The cured films behave like inorganic ceramic with excellent scratch as well as abrasion resistance

•Superior weathering performance over PU

• Better mechanical and chemical performance than Epoxy

• Excellent flexibility (passed the cylindrical (0.5 inch) mandrel bend test)

• 80% gloss retention in 2500 hours QUV (B) exposure

Potential Applications Coatings for wind-mill blades

Offshore structures

Antifouling coatings

industrial machineries

Bridges & Stadiums





4B

Erichsen Impact Test ( 1.6 Kg / 80 cm )




Abrasion Resistance @1000 cycles on CS17 1 kg

ASTM 4060 88 mg


ASTM 4060

ASTMD 522


ASTM D 4752

IS 13213: 24 hrASTM E 643


QUV B313 Test ASTM D 4587

Cyclic Corrosion ASTM D 5894

ASTM B 117

Standard EpoxyPaint

Acrylic PolysiloxanePaint

2000 hr

Exposure Time (hr)

ΔE

Area of Applications

Coatings for Aerospace Defense equipments Windmill blade Car Windshield Anti graffiti Facade paints Water repellency Industrial topcoats Marine Furniture Floor

Research for Tomorrow’s Technology

silicone modified inorganic-organic hybrid polymers ... · pdms or polysiloxanes silicone silicones...

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