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Polymer-pigment composite material

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

Inactive Publication Date: 2006-04-19
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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  • Polymer-pigment composite material
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  • Polymer-pigment composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0108] Example 1 - Preparation of two-phase polymer particles by two-stage polymerization

[0109] The two-phase polymer particles of the present invention having a soft polymer phase and a hard polymer phase were prepared by two-stage polymerization as follows: an initial amount of deionized water was added to a flask and heated to 80° C. under a nitrogen atmosphere. Next, 10.0 grams of deionized water containing 10.0 grams of surfactant was added to the flask, followed by an initiator solution containing 4.8 grams of sodium persulfate in 50.0 grams of deionized water. Immediately after the addition of the initiator solution, the first monomer emulsion ME I was added to the flask at a rate of approximately 12.0 g / min while maintaining the temperature of the reaction mixture at 80°C. After the addition of the first monomer emulsion was complete, the contents of the flask were held at 80°C for 10 minutes. Next, a second monomer emulsion ME II was added to the flask at a rate...

Embodiment 2

[0112] Example 2 - Preparation of single-phase polymer particles for comparison

[0113]Single-phase polymer particles for comparison were prepared as follows: an initial amount of deionized water was added to a flask and heated to 80°C under a nitrogen atmosphere. Next, a soap solution was prepared and added to the flask, followed by the initiator solution. Immediately after the addition of the initiator solution, monomer emulsion (ME) was added to the flask at a rate of approximately 17.5 g / min while maintaining the temperature of the reaction mixture at 80°C. After the addition of the monomer emulsion was complete, the contents of the flask containing the dispersion were held at 80°C for 15 minutes and then allowed to cool to 15°C. Next, aqueous ammonia (28%) was added to raise the pH to 8.0-10.0. Filter the contents of the flask to remove any coagulum.

[0114] Example

Initial D.I.

water (g)

soap solution

Initiator solution

monomer em...

Embodiment 4

[0138] Example 4 - Coating Results

[0139] 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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Patent Type & Authority Patents(China)
IPC IPC(8): C08K3/22C08J3/20C08K9/08C09C1/36
CPCC01P2006/90C08F257/02C09C1/3676C01P2004/62C01P2004/51C08F220/18C01P2006/60C01P2004/03C01P2004/60C08F230/02C01P2004/80C08K9/08C09D151/003C08F220/1804
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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