New High Performance Matting Agents for Waterborne Architectural Coatings

Transcription

1 New High Performance Matting Agents for Waterborne Architectural Coatings Carlos Bravo, TCS Manager, Grace Materials Technologies Grace Template_2012 v1.pptx 1 1

2 Agenda SYLOID A Series Silica - New Matting Agents for Architectural Coatings Introduction Matting Mechanism Application Performance Summary 2

3 Introduction SYLOID A Series Silica Product Benefits Overview Syloid A Series silica is a result of the superior process knowhow on porous silica technology and management of key physical characteristics of matting agents developed by Grace. Designed to meet technical challenges of matte waterborne architectural coatings having very low gloss and sheen values. Enhanced performance in formulations based on polymer dispersions and emulsions. Non-dusting, easy to disperse, less foam generation and minimum risk of binder coagulation are some of the most appreciated benefits. 3

4 Matting Mechanism How is the Matting Effect Achieved? SYLOID Silica Particles Liquid Coating Dried Film Solvent Evaporation Micro-roughness forms as film shrinks Substrate In traditional S/B systems, coating layer shrinkage occurs during drying as solvent is released. Paint film deforms around silica particles resulting in microrough surface matte effect. 4

5 Matting Mechanism How is the Matting Effect Achieved? Light Source Light Source Substrate Spectral Reflection i.e. 100 Gloss Units Diffuse Reflection i.e. <100 Gloss Units Incident light is diffusely reflected from the micro-rough surface, conveying the impression of low gloss or matte appearance. 5

6 Matting Aging Physicochemical Properties Diatomaceous Earth (DE) High Solids / Low Moisture Crystalline Structure Irregular Geometric Particles Medium Purity Low Bulk Density Synthetic Silica Gel Low Solids / High Functional Moisture Amorphous Structure Granular Particles High Purity High Bulk Density 6

7 Matting Performance Factors Influencing the Matting Efficiency Pore Volume (Porosity) Particle Size 7

8 Matting Performance Factors Influencing the Matting Efficiency PORE VOLUME Silica Pore Volume = 1.2 ml/g Silica Pore Volume = 1.8 ml/g Silica Pore Volume = 2.0 ml/g 608 Gloss Units % Matting Agent on Total Formulation Comparison of 3 silica matting agents with equivalent particle size but different pore volume. 8

9 Matting Performance Factors Influencing the Matting Efficiency PARTICLE SIZE 5 micron 7 micron 9 micron 609 Gloss Units % Matting Agent on Total Formulation Comparison of 3 silica matting agents with equivalent particle size but different pore volume. 9

10 Formulation Details Component Parts by weight % Diatomaceous Earth formula SYLOID A 4116 silica formula Water Preservative Cellulose ether Nonionic surfactant KTPP Dispersing agent Antifoam / Defoamer Ethylene glycol Alkanolamine ph adjustor Mixing Titanium dioxide Calcium carbonate Calcined kaolin Diatomaceous earth Syloid A 4116 silica Anti-settling / rheology agent Dispersing to required fineness Styrene acrylic resin Coalescent HASE thickener Total weight % Formula Constants Diatomaceous Earth formula SYLOID A 4116 silica formula Specific gravity % solids by weight % solids by volume PVC %

11 Application Performance Property Diatomaceous Earth formula Part by Weight SYLOID A 4116 silica formula Viscosity (KU) ph CIE L, a and b Gloss / Sheen (60º / 85º) Contrast ratio (%) ASTM D Porosity Tinting strength (%) 8% Phthalo blue Scrub to fail (cycles) Burnishing ( 85º) Films applied at 3 mils wet film thickness. Making our customers coatings business more sustainable and profitable 11

12 Application Performance Impact of Drying Conditions on Performance Product Air dried coating opacity Drying Conditions Oven dried (60ºC) coating opacity Wet screen coating opacity SYLOID A 4116 silica Natural DE Calcined DE Coating based on: 85% acrylic resin (50% solids), 10% TiO 2 slurry (at 60% TiO 2 concentration) and 5% matting agents. When innovation is sustainable and deliver value 12

13 Product Performance Control Syloid A Series Silica Syloid A Series Silica shows better stain resistance in a premium flat acrylic wall paint 13

14 Product Performance Control Syloid A Series Silica Syloid A Series Silica shows better hiding in a premium flat acrylic wall paint, even with lower dry film thickness 14

15 Summary Advantages of SYLOID A Series Silica Matting Agents for Architectural Coatings High Performance Superior matting performance compared to DE. Cost Effective High efficiency, no dust and easy dispersion translate into higher productivity and reduced manufacturing costs. Locally Available SYLOID A 4116 silica is locally manufactured in Sorocaba Brasil World Class Support Global support from experienced professionals to ensure customer satisfaction. 15

16 Thank You! Av. Parana 4690, Cajuro do Sol Sorocaba, Sao Paulo Carlos Bravo Technical Customer Service Manager Engineered Materials T E carlos.a.bravo@grace.com We appreciate your time and interest Visit the Grace team at Booth 31 - Avenida C, ruas 2-3 GRACE and SYLOID, are trademarks, registered in the United States and/or other countries, of W. R. Grace & Co.-Conn. This trademark list has been compiled using available published information as of the publication date of this presentation and may not accurately reflect current trademark ownership or status. The information presented herein is derived from our testing and experience. It is offered for your consideration and verification. Since operating conditions vary significantly, and are not under our control, we disclaim all warranties on the results that may be obtained from the use of our products. Copyright 2015 W. R. Grace & Co.-Conn. 16