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Modified polyurethane (PU) acrylic resin and preparation method thereof

A technology of acrylic resin and acrylic acid, which is applied in the direction of coating, polyurea/polyurethane coating, etc., can solve the problems of pigment wettability, leveling, poor fullness, and limit the use of acrylic resin, etc., and achieve good comprehensive performance of the resin, Good effect of chemical corrosion resistance

Inactive Publication Date: 2012-08-29
JIANGMEN PAINT FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing acrylic resins for PU paints are generally inferior to alkyd resins in terms of pigment wettability, leveling, and fullness, and cannot meet people's requirements well, which limits the use of acrylic resins.

Method used

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  • Modified polyurethane (PU) acrylic resin and preparation method thereof
  • Modified polyurethane (PU) acrylic resin and preparation method thereof
  • Modified polyurethane (PU) acrylic resin and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0022] A preparation method of modified PU acrylic resin, comprising the following steps:

[0023] 1) Divide butyl acrylate, acrylic acid, 2-hydroxypropyl acrylate, hydroxyethyl methacrylate, methyl methacrylate, styrene, chain transfer agent, antioxidant and 50-70% initiator into three batches Mix and add to the mixing tank in three batches, keep the temperature in the mixing tank <35°C, mix evenly, and set aside;

[0024] 2) Add glycidyl tert-carbonic acid ester and 70-95% organic solvent into the reaction kettle, feed high-purity nitrogen gas, stir, and heat to 130-150°C;

[0025] 3) Add the materials in the mixing tank to the reaction kettle, keep the temperature for 0.5 to 1.5 hours after the addition, and keep the solvent reflux during the reaction;

[0026] 4) Mix the remaining initiator and organic solvent in two batches and add them to the reaction kettle in batches. After the addition is completed, keep the reaction for 2 to 5 hours and keep the solvent reflux durin...

Embodiment 1

[0030] The following table 1 is the raw material composition of modified PU acrylic resin:

[0031] Table 1: Raw material composition of modified PU acrylic resin

[0032]

Embodiment 2

[0034] The following table 2 is the raw material composition of modified PU acrylic resin:

[0035] Table 2: Raw material composition of modified PU acrylic resin

[0036]

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PUM

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Abstract

The invention discloses modified PU acrylic resin and a preparation method thereof. Raw materials consist of 10 to 15 percent of glycidyl tertiary carboxylic ester, 1 to 3 percent of butyl acrylate, 3 to 6 parts of propenoic acid, 2 to 10 percent of hydroxypropyl acrylate, 2 to 8 percent of poly(hydroxyethyl methacrylate), 13 to 20 percent of methyl methacrylate, 12 to 18 percent of styrene, 0.1 to 0.3 percent of chain transfer agent, 0.05 to 0.1 percent of antioxygen, 0.8 to 1.5 percent of initiator and 38 to 42 percent of organic solvent. The modified PU acrylic resin provided by the invention has the advantages of high paint wettability, high leveling property, high chemical resistance and high comprehensive performance and is particularly suitable to be used as bicomponent PU paint for manufacturing vehicle coatings and industrial coatings.

Description

technical field [0001] The invention relates to a PU acrylic resin and a preparation method thereof, in particular to a modified PU acrylic resin and a preparation method thereof. Background technique [0002] Acrylic resin is a polymer with a C-C structure as the main chain, and the side chains are alkyl esters (such as methyl esters, ethyl esters, butyl esters, etc.), hydroxyalkyl esters, and a small amount of carboxyl groups. General hydroxyacrylic resins for PU paints are polymerized from monomers such as (meth)acrylate, (meth)acrylate hydroxyester, (meth)acrylic acid, and styrene. [0003] The existing acrylic resins for PU paints generally have poorer pigment wettability, leveling and fullness than alkyd resins, and cannot well meet people's requirements, which limits the use of acrylic resins. Contents of the invention [0004] The object of the present invention is to provide a kind of modified PU acrylic resin and preparation method thereof. [0005] The technic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L25/14C08L33/12C08F212/08C08F220/14C08F2/44C08G18/62C09D175/04
Inventor 叶红卫
Owner JIANGMEN PAINT FACTORY
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