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Polymer-pigment composite material

A polymer, soft polymer technology, applied in the direction of fibrous fillers, coatings, etc., can solve problems such as adverse effects of corrosion resistance of metal coatings, achieve good water dispersion stability, improve hiding, and improve anti-flocculation. Effect

Inactive Publication Date: 2002-06-19
ROHM & HAAS CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of dibasic phosphates may have an adverse effect on the corrosion resistance of metallic coatings containing composite particles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] Example 1 - Preparation of two-phase polymer particles by two-stage polymerization

[0093] Example

Initial D.I.

water (g)

Monomer Emulsion (I)

Monomer Emulsion (II) (II)

1.1

1000

100.0g D.I. water, 14.4g surfactant, 398.0g ST, and 2.0g

MAA.

110g D.I. water, 10g surfactant, 200.0g BA, 186.2g MMA,

and 14.1 gPEM.

1.2

1600

200.0g D.I. water, 24.4g surfactant, 796.0g ST, and 4.0g

MAA.

110g D.I. water, 10g surfactant, 200.0g BA, 185.9g MMA,

and 14.1 gPEM.

1.3

1600

200.0g D.I. water, 24.4g surfactant, 796.0g ST, and 4.0g

MAA

D.I. water, 10g surfactant, 200.0g BA, 171.8g MMA, and

28.2 gPEM.

1.4

1600

200.0g D.I. water, 24.4g surfactant, 796.0g ST, and 4.0g

MAA.

95.5g D.I. water, 10g surfactant, 200.0g BA, 192.0g

MMA, 2.0g AA, and containing acrylic acid macromonomer

...

Embodiment 4

[0106] Example 4 - Coating Results

[0107] Paints containing composite particles of the invention were compared to comparative paints containing composite particles. The comparative paint used to determine tri-tin strength and scrub ratio was the paint without composite particles.

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Abstract

Composite particles and a method of preparing the composite particles are provided. The composite particles contain titanium dioxide particles with adsorbed two-phase polymer particles. The two-phase polymer particles have a soft polymer phase and a hard polymer phase in which the weight ratio of the hard polymer phase to the soft polymer phase is in the range of 10:1 to 1:5. The composite particles containing the two-phase polymer particles have improved aqueous stability and provide coatings with improved scrub resistance.

Description

field of invention [0001] The present invention relates to polymer-pigment composite particles. In particular, the present invention relates to composite particles comprising pigment particles and polymer particles, wherein the polymer particles contain two polymer phases. Further, the invention relates to a method for preparing the composite material. Background technique [0002] Titanium dioxide is the pigment of choice by most paint producers, especially paint manufacturers, to provide whiteness and opacity or to "hide" the final dry coating. Titanium dioxide is typically the most expensive raw material in paint formulations. Therefore, paint producers have long sought to achieve the desired opacity by using the smallest possible amount of titanium dioxide. Many techniques have been developed, including: [0003] (1) using titanium dioxide with optimal average particle size and particle size distribution for light scattering; [0004] (2) Use...

Claims

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Application Information

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IPC IPC(8): C08K9/08C09C1/36
CPCC08F230/02C09C1/3676C09D151/003C08F257/02C08F220/18C01P2004/80C01P2006/90C08K9/08C01P2004/03C01P2006/60C01P2004/62C01P2004/60C01P2004/51C08F220/1804
Inventor J·K·巴德曼W·T·布朗K·M·唐纳利张伟B·H·莱瑟
Owner ROHM & HAAS CO
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