Fine emulsion polymerization method of polyurethane acrylic ester compound emulsion

A technology of miniemulsion polymerization and acrylate, which is applied in the field of miniemulsion polymerization of polyurethane-acrylate composite emulsion, can solve the problems of environmental pollution and low conversion rate of acrylate monomer, and achieve superior mechanical properties, excellent comprehensive performance, The effect of high adhesion

Inactive Publication Date: 2007-05-30
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

U.S. Patent 6384110 (2002) carries out miniemulsion polymerization to castor oil type polyurethane and acrylate monomer to obtain polyurethane-acrylic ester composite emulsion, but this method must carry out miniemulsion polymerization after steaming castor oil type polyurethane solvent earlier, and because castor oil Type polyurethane has a large transfer of free radicals, and the conversion rate of acrylate monomer is low. In addition, castor oil type polyurethane solvent will cause environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of miniemulsion polymerization method of embodiment 1 polyurethane-acrylic acid ester composite emulsion, it is characterized in that comprising the steps:

[0023] The first step is to dehydrate the polyol polymer in the reaction kettle at a temperature of 60-140°C and a vacuum of 0.01-0.3MPa for 0.2-8 hours for use in the polymerization of acrylate monomers, polyisocyanates and polyols. The chain extender is dehydrated through a molecular sieve with a pore size of 4 Ȧ,

[0024] In the second step, feed nitrogen into the reactor for 5 to 80 minutes, add 100 parts by mass of dehydrated polyol polymer and 0.1 to 5 parts by mass of polyisocyanate and polyol polymerization catalyst to stir, in this embodiment , polyisocyanate and polyol polymerization catalyst can be taken as 0.3 part, 0.8 part, 1 part, 2.5 part, 4 parts, 5 parts, and the polyisocyanate of 30-300 parts of quality is added dropwise, can be selected as 40 in the present embodiment parts, 70 parts, 10...

Embodiment 2

[0036] Embodiment 2: a kind of miniemulsion polymerization method of polyurethane-acrylate composite emulsion, comprises the steps:

[0037] The first step is to dehydrate the polyol polymer in the reaction kettle at a temperature of 60-140°C and a vacuum of 0.01-0.3MPa for 0.2-8 hours for use in the polymerization of acrylate monomers, polyisocyanates and polyols. The chain extender is dehydrated through a molecular sieve with a pore size of 4 Ȧ,

[0038] In the second step, feed nitrogen into the reactor for 5 to 80 minutes, add 100 parts by mass of dehydrated polyol polymer and 0.1 to 5 parts by mass of polyisocyanate and polyol polymerization catalyst to stir, in this embodiment , polyisocyanate and polyol polymerization catalyst can be taken as 0.3 part, 0.8 part, 1 part, 2.5 part, 4 parts, 5 parts, and the polyisocyanate of 30-300 parts of quality is added dropwise, can be selected as 40 in the present embodiment parts, 70 parts, 100 parts, 140 parts, 190 parts, 220 par...

Embodiment 3

[0050] A kind of miniemulsion polymerization method of polyurethane-acrylate composite emulsion, it is characterized in that comprising the steps:

[0051] The first step is to dehydrate the polyol polymer in the reaction kettle at a temperature of 60-140°C and a vacuum of 0.01-0.3MPa for 0.2-8 hours for use in the polymerization of acrylate monomers, polyisocyanates and polyols. The chain extender is dehydrated through a molecular sieve with a pore size of 4 Ȧ,

[0052] In the second step, feed nitrogen into the reactor for 5 to 80 minutes, add 100 parts by mass of dehydrated polyol polymer and 0.1 to 5 parts by mass of polyisocyanate and polyol polymerization catalyst to stir, in this embodiment , polyisocyanate and polyol polymerization catalyst can be taken as 0.3 part, 0.8 part, 1 part, 2.5 part, 4 parts, 5 parts, and the polyisocyanate of 30-300 parts of quality is added dropwise, can be selected as 40 in the present embodiment parts, 70 parts, 100 parts, 140 parts, 190...

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Abstract

A process for polymerizing the fine polyurethane-acrylate emulsion includes such steps as dewatering polyol, acrylate and chain enlarging agent, introducing N2 to agitated reactor, adding polyol and catalyst, stirring while dropping polyisocyanate, heating, adding chain enlarging agent and acrylate, adding hydroxyalkyl acrylate, cooling, adding trigger, adding deionized water containing surfactant while stirring, dispersing, adding N2, heating, reaction and cooling.

Description

technical field [0001] The invention relates to a method for preparing a polyurethane-acrylate composite emulsion, which relates to a miniemulsion polymerization method of a polyurethane-acrylate composite emulsion. technical background [0002] With the enhancement of people's awareness of environmental protection and energy, especially the strict restrictions on the content of organic compounds (VOC) in various countries' environmental protection laws, the development of low-pollution polymer materials represented by emulsion polymers is promoted. In recent years, the research on polymer functional materials has become popular, which requires the performance and functions of polymer materials to be diversified. Emulsion polymerization, one of the important means of preparing polymer materials, has also changed from a single type of component and particle structure to a composite type, preparing polymer emulsions with multiple polymer components and special particle structu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F290/06
Inventor 王春鹏储富祥蒋煜赵临五
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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