development of an easy construction type aqueous color ......abrasion resistance maximum 500 mg 81...
TRANSCRIPT
Development of an Easy Construction Type Aqueous Color Paint Having Excellent Abrasion and Skid Resistance
KEISUKE NARUSHIMA, MAI OIKAWA, SATOSHI TADA, MASATO MURAYAMA, NAOYUKI YACHI
TOA ROAD CORPORATION, TSUKUBA, IBARAKI, JAPAN
1
Introduction
Color paint
・landscape
・protect
・safety visibility
skid resistance
2
Introduction
Complicated application
Cleaning
Priming
Mixing paint materials
Color paint
… etc
2
Introduction
Complicated procedure
Cleaning
Mixing paint materials
VOC reduction
Oil paint
… etc
TolueneXylene …and more
Color paint
Aqueous paint
Lower abrasion resistance
Lower adhesion
Environment
Priming
3
Development Objective
Easy application
Aqueous color paintExcellent abrasion and skid resistance
Without complicated procedure
More than oil paint and the same class
An one-liquid paint
good workability even in low temperature
4
Evaluation method
1. Film formation at low temperature
intact film defective film
cracking
Digital microscope image
2. Abrasion resistance
3. Skid resistance
5
Evaluation method
2. Abrasion resistance
Wet track abrasion tester(JEAAT-1)
Calculating the abrasion ratio
after 1-6 cycles
abrasion ratio 64%abrasion ratio 0%
1. Film formation at low temperature
3. Skid resistance
6
Evaluation method
2. Abrasion resistance
3. Skid resistance
A pendulum skid resistance tester
1. Film formation at low temperature
Category Type of site Value
A
Difficut sites such as1. Roundabout
2. Bent with radius less than 150m3. Approaches to trafic lights on on unrestricted road
65
BMotorways, trunk and class 1 roads and
heavily trafficked road in urban areas55
C all other site 45
Skid resistance Value (Road Research Laboratory )
6
Evaluation method
2. Abrasion resistance
3. Skid resistance
A pendulum skid resistance tester
1. Film formation at low temperature
The value of standard 60 BPN or more.
Asphalt pavement
Minimum 60 BPN
contents Resin Pigment Aggregate OthersRatio(%) 30 13 20 37
7
Investigation of materials
Constituents of prototype material
7
Investigation of materials
Constituents of prototype material
Candidates for resin and their properties
Checking these abrasion resistance after curing at 23℃
contents Resin Pigment Aggregate OthersRatio(%) 30 13 20 37
Item Resin a Resin b Resin c Resin d Resin e Resin f Resin g
Constituents Acrylic/styrene Silica-modified acrylic/styrene
Silica-modified acrylic/styrene Acrylic/styrene Acrylic/styrene Silica-modified
acrylic/styrene Acrylic/styrene
Particle dia. (μm) 0.09 0.15 0.15 0.17 0.17 0.12 0.13
Tg (°C) -20 -15 10 2 6 15 17MFTs (°C) Below 0 Below 0 29 9 15 21 30
Characteristics Water resistance
Water resistance
Alkali resistance
Water resistanceWeather
resistance
Pigment miscible
Water resistance
Water resistance
Weather resistance
Item Resin a Resin b Resin c Resin d Resin e Resin f Resin g
Constituents Acrylic/styrene Silica-modified acrylic/styrene
Silica-modified acrylic/styrene Acrylic/styrene Acrylic/styrene Silica-modified
acrylic/styrene Acrylic/styrene
Particle dia. (μm) 0.09 0.15 0.15 0.17 0.17 0.12 0.13
Tg (°C) -20 -15 10 2 6 15 17MFTs (°C) Below 0 Below 0 29 9 15 21 30
Characteristics Water resistance
Water resistance
Alkali resistance
Water resistanceWeather
resistance
Pigment miscible
Water resistance
Water resistance
Weather resistance
7
Investigation of materials
Constituents of prototype material
Candidates for resin and their properties
Resin a and Resin b have low MFT,
but their abrasion resistance is too low.
contents Resin Pigment Aggregate OthersRatio(%) 30 13 20 37
Soft type resin
Item Resin a Resin b Resin c Resin d Resin e Resin f Resin g
Constituents Acrylic/styrene Silica-modified acrylic/styrene
Silica-modified acrylic/styrene Acrylic/styrene Acrylic/styrene Silica-modified
acrylic/styrene Acrylic/styrene
Particle dia. (μm) 0.09 0.15 0.15 0.17 0.17 0.12 0.13
Tg (°C) -20 -15 10 2 6 15 17MFTs (°C) Below 0 Below 0 29 9 15 21 30
Characteristics Water resistance
Water resistance
Alkali resistance
Water resistanceWeather
resistance
Pigment miscible
Water resistance
Water resistance
Weather resistance
contents Resin Pigment Aggregate OthersRatio(%) 30 13 20 37
7
Investigation of materials
Constituents of prototype material
Candidates for resin and their properties
Resin g shows highest abrasion resistance.
after 6 cycle
abrasion ratio 0%
Decrease MFT of resin g
8
MFT : Minimum Film-forming Temperature
Investigation of materials
The film can’t formed correctly below MFT.
intact film
defective film
Ratio of low Tg emulsion(%)
MFT(℃
)
Mixing low Tg emulsion
Method 1
Saiden Chemical Industry Co.
9
MFT : Minimum Film-forming Temperature
Investigation of materials
The film can’t formed correctly below MFT.
intact film
defective film
Method 2
coalescenceemulsion Film formation
Coalescence prompt to adhesion between emulsions
Lowering the abrasion resistance
10
MFT : Minimum Film-forming Temperature
Investigation of materials
The film can’t formed correctly below MFT.
intact film
defective film
Ratio of coalescence(%)
MFT(℃
)
Saiden Chemical Industry Co.
Method 2
Adding coalescence
To avoid lowering abrasion resistance, the choice and quantity of coalescence is important.
11
Constituents of material
Investigation of materials
cured at 5℃ cured at 5℃
defective film
contents Resin Pigment Aggregate OthersRatio(%) 30 13 20 37
Method 1
Only resin gmixing resin a
after 6 cycle
abrasion ratio 0%
(23℃)
after 1 cycle
abrasion ratio 40%
(23℃)
Abrasion resistance was immediately decreased
intact film
resin a + g
contents Resin g Pigment AggregateRatio(%) 30 13 20
OthersCoalescence
12
Constituents of material
Investigation of materials
Adding coalescence
cured at 5℃ cured at 5℃Method 2
* Comparison with butyl acetate
defective film intact film
Coalescence H I JBoiling point (°C) 170 229 254Evaporation rate* 7 1 less than 1
contents Resin g Pigment AggregateRatio(%) 30 13 20
OthersCoalescence
13
Constituents of material
Investigation of materials
Method 2
after 1 cycle
abrasion ratio 40%
after 1 cycle
abrasion ratio 40%
* Comparison with butyl acetate
Coalescence H I JBoiling point (°C) 170 229 254Evaporation rate* 7 1 less than 1
after 1 cycle
abrasion ratio 5%
Coalescence H (5℃) Coalescence I (5℃) Coalescence J (5℃)
Low abrasion resistance Low abrasion resistance
contents Resin g Pigment AggregateRatio(%) 30 13 20
OthersCoalescence
13
Constituents of material
Investigation of materials
Method 2
after 1 cycle
abrasion ratio 40%
after 1 cycle
abrasion ratio 40%
* Comparison with butyl acetate
Coalescence H I JBoiling point (°C) 170 229 254Evaporation rate* 7 1 less than 1
after 1 cycle
abrasion ratio 5%
Coalescence H (5℃) Coalescence I (5℃) Coalescence J (5℃)
after 6 cycle
abrasion ratio 0%Coalescence I (23℃)
abrasion ratio 0%
after 6 cycle
14
Constituents of material
Investigation of materials
Rounded shape
contents Resin g Pigment Coalescence Aggregate OthersRatio(%) 30 13 1.5 20 35.5
Prototype
14
Constituents of material
Investigation of materials
+Mixing another shape
aggregate
Improved aggregate
Rounded shape Rounded shape Angular shape
contents Resin g Pigment Coalescence Aggregate OthersRatio(%) 30 13 1.5 20 35.5
Prototype
narrow the gap
Easy to tear off
contents Resin g Pigment Coalescence Aggregate OthersRatio(%) 30 13 1.5 20 35.5
14
Constituents of material
Investigation of materials
+
abrasion ratio 5%
after 1 cycle
cured at 5℃
abrasion ratio 0%
after 6 cycle
cured at 5℃
Abrasion resistant improvement
Mixing another shapeaggregate
Rounded shape Rounded shape Angular shape
15
About development
Package of development
Standard properties for developed paint
Item Quality standards Results Test methodsDensity 1.05 g/ml or more 1.32 g/ml JIS K 5600-2-4
Heating residue minimum 50 % 53% JIS K 5601-2-4Drying time Within 3 hours ○ JIS K 5665 8.12a)
Abrasion resistance maximum 500 mg 81 mg JIS K 5665 8.17a)
Skid resistance minimum 40 (our objective is minimum 60) 78 A pendulum skidresistance tester
Water resistance Without cracks, peeling, and changes of color ○ JIS K 5665 8.19
Weather resistance Without cracks, peeling, and changes of colorafter 250 hours of weather proofing test ○ JIS K 5600-7-7
* The manual of procedure for the application of color pavement paint
*
Hard to slip
Item Quality standards Results Test methodsDensity 1.05 g/ml or more 1.32 g/ml JIS K 5600-2-4
Heating residue minimum 50 % 53% JIS K 5601-2-4Drying time Within 3 hours ○ JIS K 5665 8.12a)
Abrasion resistance maximum 500 mg 81 mg JIS K 5665 8.17a)
Skid resistance minimum 40 (our objective is minimum 60) 78 A pendulum skidresistance tester
Water resistance Without cracks, peeling, and changes of color ○ JIS K 5665 8.19
Weather resistance Without cracks, peeling, and changes of colorafter 250 hours of weather proofing test ○ JIS K 5600-7-7
15
About development
High abrasion and skid resistance
Good usability
Standard properties for developed paint
Package of development
About one hour in winter
* The manual of procedure for the application of color pavement paint
Self standingEasy to dispose
16
Application
Procedure for applying development
Covered Kneading Pouring
First layer Second layer Completion
17
Application
Application for a parking lot
Before After 6 Month
Before After 6 Month
Application for a building entrance
No defects
No defects
18
Conclusion
Easy construction at low temperature
・Selecting resin and adding coalescence improve the formation of film at 5℃.
・The combination of aggregates with another shape rose abrasion resistance of film.
Excellent abrasion and skid resistance
・Skid resistance of this development is 78 BPN.
Thank you for your attention!
S1
Supporting
Construction examples
Side walks
Pillars or Walls
Slopes for a wheelchair
S2
Supporting
Weather resistance
The accelerated weathering test
∆E * ocher gray green red black blueafter 1125 hour 0.44 1.13 0.85 0.44 0.48 3.80
※ a standard value is with in 5 after 300 hours
The chroma meter CR410(KONICA MINOLTA)
S3
Supporting
Weather resistance
The direct weather test After one year
before After one year