Development of an Easy Construction Type Aqueous Color ......Abrasion resistance maximum 500 mg 81 mg JIS K 5665 8.17a) Skid resistance minimum 40 (our objective is minimum 60) 78

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


Wet track abrasion tester(JEAAT-1)

Calculating the abrasion ratio

after 1-6 cycles

abrasion ratio 64%abrasion ratio 0%


3. Skid resistance

6

Evaluation method


3. Skid resistance

A pendulum skid resistance tester


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


3. Skid resistance

A pendulum skid resistance tester


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



Candidates for resin and their properties

Checking these abrasion resistance after curing at 23℃


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





Particle dia. (μm) 0.09 0.15 0.15 0.17 0.17 0.12 0.13



Water resistance

Alkali resistance


resistance

Pigment miscible

Water resistance

Water resistance

Weather resistance

7




Resin a and Resin b have low MFT,

but their abrasion resistance is too low.


Soft type resin





Particle dia. (μm) 0.09 0.15 0.15 0.17 0.17 0.12 0.13



Water resistance

Alkali resistance


resistance

Pigment miscible

Water resistance

Water resistance

Weather resistance


7




Resin g shows highest abrasion resistance.

after 6 cycle

abrasion ratio 0%

Decrease MFT of resin g

8

MFT : Minimum Film-forming Temperature


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




intact film

defective film

Method 2

coalescenceemulsion Film formation

Coalescence prompt to adhesion between emulsions

Lowering the abrasion resistance

10




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


cured at 5℃ cured at 5℃

defective film


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



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


OthersCoalescence

13



Method 2

after 1 cycle

abrasion ratio 40%

after 1 cycle

abrasion ratio 40%



after 1 cycle

abrasion ratio 5%

Coalescence H (5℃) Coalescence I (5℃) Coalescence J (5℃)

Low abrasion resistance Low abrasion resistance


OthersCoalescence

13



Method 2

after 1 cycle

abrasion ratio 40%

after 1 cycle

abrasion ratio 40%



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



Rounded shape

contents Resin g Pigment Coalescence Aggregate OthersRatio(%) 30 13 1.5 20 35.5

Prototype

14



+Mixing another shape

aggregate

Improved aggregate

Rounded shape Rounded shape Angular shape


Prototype

narrow the gap

Easy to tear off


14



+

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

Documents

Development of an Easy Construction Type Aqueous Color ......Abrasion resistance maximum 500 mg 81 mg JIS K 5665 8.17a) Skid resistance minimum 40 (our objective is minimum 60) 78