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Composition containing associative rheology modifier and polymer encapsulated pigment particles

A technology of pigment particles and composition, applied in the field of composition of light-shielding pigment particles, can solve the problems of reduced opacity and the like

Inactive Publication Date: 2014-03-05
ROHM & HAAS CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in general, associative thickeners, especially HEUR associative thickeners, result in lower opacity compared to non-associative thickeners

Method used

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  • Composition containing associative rheology modifier and polymer encapsulated pigment particles
  • Composition containing associative rheology modifier and polymer encapsulated pigment particles
  • Composition containing associative rheology modifier and polymer encapsulated pigment particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] The following examples are for illustration only and are not intended to limit the scope of the invention.

[0049] Intermediate 1 - Polymer encapsulated TiO 2 preparation of

[0050] equipped with paddle stirrer, N 2 A 500 ml four necked round bottom flask with inlet, reflux condenser, heating mantle and thermocouple was charged with TiO prepared essentially as described in paragraphs 0053 and 0059 of US20100298483A1 2 Slurry (194.9 g, 73.9% solids), and separate solutions of sodium dodecyl sulfate (SDS, 1.5 g) and sodium styrene sulfonate (1.2 g dissolved in 10 g deionized water). use N 2 The flask was purged and the temperature was adjusted to 50 °C at which time 0.1% ferric sulfate (4.0 g) was mixed with an aqueous solution of 1% ethylenediaminetetraacetic acid sodium salt (0.4 g) and added to the flask. After two minutes, co-feed #1 (1.6 g t-butyl hydroperoxide dissolved in 25 g deionized water) and co-feed #2 (0.9 g erythorbic acid dissolved in 25 g deionize...

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Abstract

The present invention relates to a composition comprising an associative thickener, a binder, polymer encapsulated opacifying pigment particles, and water. The composition of the present invention shows an improvement in opacity and S / mil in the Kubelka-Munk test method, over similar compositions that do not include polymer encapsulated opacifying pigment particles.

Description

Background technique [0001] The present invention relates to compositions comprising an associative thickener and polymer-encapsulated opacifying pigment particles. HEUR associative thickeners are used to thicken architectural and industrial coatings and are well known to impart many desirable properties to coatings such as good leveling, high gloss and good resistance Scrubbing and water resistance. However, in general, associative thickeners, especially HEUR associative thickeners, result in lower opacity compared to non-associative thickeners. Therefore, it would be an advance in the art to be able to retain all the desired properties while not sacrificing opacity. Contents of the invention [0002] The present invention addresses the need in the art by providing a composition comprising: [0003] a) 0.02-10% by weight of associative thickener; [0004] b) 1-50% by weight binder; [0005] c) 1-60% by weight polymer-encapsulated opacifying pigment particles; and [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/02C09D7/00C09D7/12C09C1/36C09D7/43C09D7/62
CPCC09D7/1275C09C1/3676C09D7/002C09D7/1225C09D5/028C09D5/027C09D7/43C09D7/62C09D7/68
Inventor W·T·布朗A·K·范德克
Owner ROHM & HAAS CO
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