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Associative waterborne polyurethane/polyacrylate copolymer emulsion anti-settling thickener

A technology of water-based polyurethane and polyacrylate, which is applied in the direction of coating, etc., to achieve the effect of simple production method, convenient use and simple production process

Active Publication Date: 2017-09-12
LUOYANG SHENGJIA CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Judging from the current situation, adding associative acrylic thickener or associative polyurethane thickener to these systems can solve the short-term (generally within 8 days) precipitation problem, but it cannot fundamentally solve the problems caused by long-term application. a large amount of precipitation

Method used

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  • Associative waterborne polyurethane/polyacrylate copolymer emulsion anti-settling thickener

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Synthesis of waterborne polyurethane

[0043] Add 33.5 parts of Pol-2356 (hydroxyl value 54-56 mg KOH / g, produced by Qingdao Yutian Chemical Industry), 3 parts of non-ionic hydrophilic diol N-120 (hydroxyl value 100-120 mg KOH / g, German Gusa Company), 1 part of trimethylolpropane (Sweden Pastor Company), 4 parts of dimethylolpropionic acid (DMPA) hydrophilic agent (Sweden Pastor Company), heated to 70°C under full stirring , add 20 parts of isophorone diisocyanate, heat up to 75-85°C for 3-5 hours, add 5-30 parts of end-blocking agent hydroxyethyl acrylate for 2-3 hours, then cool down to 50°C, add 2 parts of salt forming agent, salt forming for 10 minutes, adding 120 parts of deionized water, stirring for 60 minutes and discharging to obtain the required water-based polyurethane;

[0044] Since the added hydrophilic glycol N-120 is nonionic, and the dimethylol propionic acid (DMPA) hydrophilic agent is anionic, the resulting waterborne polyurethane is waterborne a...

Embodiment 2

[0051] Repeat the step method of example 1, just in the synthetic of aqueous polyurethane, replace the nonionic hydrophilic glycol N-120 ( non-ionic), other are all the same as Example 1. Then the obtained water-based polyurethane does not contain non-ion.

Embodiment 3

[0053] Only synthesize water-based polyurethane according to the synthetic step method of water-based polyurethane in embodiment 1.

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Abstract

The invention relates to an associative waterborne polyurethane / polyacrylate copolymer emulsion anti-settling thickener. In the anti-settling thickener, polyacrylate accounts for 70 to 95 percent of the total amount of a resin; polyurethane accounts for 5 to 30 percent of the total amount of the resin; copolymer emulsion is 10 to 1,000nm in particle size, 10 to 60 percent in solid content, 10 to 60mPa.s in viscosity, 2 to 5 in pH value and 10,000 to 200,000 in molecular weight; a waterborne polyurethane chain segment contains a negative-ion hydrophilic group or has a better effect when containing negative-ion and nonionic hydrophilic groups at the same time. The novel associative waterborne polyurethane / polyacrylate copolymer emulsion anti-settling thickener is obtained through copolymerization of the polyurethane and the polyacrylate. By adopting the anti-settling thickener, the problem of precipitation due to adding of inorganic or organic filler in re-diluted waterborne industrial coatings or certain lower-viscosity waterborne systems can be solved effectively, and a long-term anti-settling effect is achieved.

Description

technical field [0001] The invention relates to a new type of associative water-based polyurethane / polyacrylate copolymer emulsion anti-settling thickener, which can be used for the dispersion and anti-settling of inorganic fillers in powder-free PVC glove coatings, as well as inorganic or organic fillers in all other low-viscosity water-based systems Dispersion and anti-settling. Background technique [0002] In some re-diluted water-based industrial coatings or some low-viscosity water-based systems, the precipitation of inorganic or organic fillers is always an urgent problem to be solved. Typically, precipitation during application is addressed by adding traditional associative acrylic thickeners or associative polyurethane thickeners to these systems. For example, the precipitation phenomenon caused by the addition of light calcium carbonate, silicon powder, aluminum silicate powder, titanium dioxide and other dense inorganic hard agents in powder-free PVC glove coatin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/00C09D7/02C08F283/00C08F220/14C08F220/18C08F220/06C09D151/08
CPCC08F283/008C09D151/08C08F220/14
Inventor 李延科
Owner LUOYANG SHENGJIA CHEM CO LTD
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