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A kind of acrylic polyurethane emulsion and its preparation method and application

A technology of acrylic polyurethane and acrylic resin, which is applied in the preparation of carboxylate, polyurea/polyurethane coatings, chemical instruments and methods, etc. It can solve the problems of increasing production costs, wasting resources, and not conforming to environmental protection trends, and achieves good water resistance. , the effect of high degree of branching

Active Publication Date: 2016-04-13
北京红狮科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the need to add about 40% xylene in the synthesis process, it wastes resources, pollutes the environment, and endangers human health.
Not only does it increase production costs, but the use of a large amount of solvents does not conform to the current environmental protection trend. During use, a curing agent must be added to cure and form a film. The use time is short, which is not conducive to construction

Method used

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  • A kind of acrylic polyurethane emulsion and its preparation method and application
  • A kind of acrylic polyurethane emulsion and its preparation method and application
  • A kind of acrylic polyurethane emulsion and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Compound A1 synthesis:

[0033] Add 90 g of glycidyl tert-carbonate and 30 g of acrylic acid into a four-necked flask, stir and raise the temperature to 100°C, and keep the temperature for 3 hours to obtain compound A1 containing double bonds;

[0034] 2) Acrylic resin synthesis:

[0035]

[0036] Mix methyl methacrylate, butyl acrylate, hydroxypropyl methacrylate, acrylic acid, and dicumyl peroxide evenly in advance, add dropwise to compound A1 at 150°C at a uniform speed, drop it for 3 hours, and then keep it warm for 1 hour. Acrylic resin is obtained;

[0037] 3) Synthesis of PUA emulsion:

[0038]

[0039] Cool the acrylic resin to 80°C, add dimethylolpropionic acid, neopentyl glycol, and trimethylolpropane, mix well, drop isophorone diisocyanate within 2 hours, and keep warm for 2-3 hours until NCO The group reacted to the theoretical content and began to cool down. Cool down to 50°C, add triethylamine dropwise, drop it within 15 minutes, add deionized ...

Embodiment 2

[0041] 1) Compound A1 synthesis:

[0042] Add 90 g of glycidyl tert-carbonate and 40 g of methacrylic acid into a four-neck flask, stir and raise the temperature to 90°C, and keep the temperature for 4 hours to obtain compound A1 containing double bonds;

[0043] 2) Acrylic resin synthesis:

[0044]

[0045] The above components were pre-mixed uniformly, and added dropwise to compound A1 at 140°C at a constant speed for 5 hours, and then incubated for 1 hour to obtain an acrylic resin;

[0046]

[0047] Cool the acrylic resin to 60°C, add dimethylolpropionic acid, neopentyl glycol, and trimethylolpropane, mix well, drop toluene diisocyanate within 2 hours, and then keep it warm for 2-3 hours until the NCO group reacts When the theoretical content is reached, the temperature is lowered to 50°C, triethylamine is added dropwise, and the drop is completed within 15 minutes. Then, deionized water is added, and the mixture is quickly stirred and dispersed to obtain a solvent-...

Embodiment 3

[0049] 1) Compound A1 synthesis:

[0050] Add 90 g of glycidyl tert-carbonate and 35 g of methacrylic acid into a four-necked flask, stir and raise the temperature to 120°C, and keep the temperature for 2 hours to obtain compound A1 containing double bonds;

[0051] 2) Acrylic resin synthesis:

[0052]

[0053] Mix the above components uniformly in advance, add dropwise to compound A1 at 160°C at a constant speed, finish dropping after 2 hours, and keep warm for 1 hour to obtain acrylic resin;

[0054] 3) Synthesis of PUA emulsion:

[0055]

[0056] Cool the acrylic resin to 70°C, add dimethylolpropionic acid, neopentyl glycol, and trimethylolpropane, mix well, drop toluene diisocyanate within 2 hours, and then keep it warm for 2-3 hours until the NCO group reacts When the theoretical content is reached, the temperature is lowered, and the temperature is lowered to 50°C. Triethylamine is added dropwise, and the drop is completed within 15 minutes. Then, deionized water...

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Abstract

The invention relates to a preparation method of an acrylic polyurethane emulsion. The preparation method comprises the following step: polymerizing acrylic resin with a hydroxyl mid-mounted molecular chain structure with isocyanate monomers to obtain the acrylic polyurethane emulsion. The acrylic polyurethane emulsion has the characteristics of high branching degree, high solid content, no solvent and the like; a coating prepared from the acrylic polyurethane emulsion is good in water resistance, hardness, scratch resistance and coating fullness, and is suitable for the field of woodware polishing and mechanical decoration protection.

Description

technical field [0001] The invention relates to an acrylic polyurethane emulsion and its preparation method and application, belonging to the technical field of polymer materials. Background technique [0002] PUA (acrylic polyurethane) composite emulsion has the characteristics of wear resistance, corrosion resistance and brightness, softness and elasticity, good water resistance and mechanical properties, and good weather resistance. a development trend. [0003] At present, the synthesis method of PUA (acrylic polyurethane) emulsion mainly adopts polyether, polyester or carbonate with hydroxyl at both ends of the molecular chain as the reactant, and the obtained PUA (acrylic polyurethane) composite emulsion is mostly linear or low branched. PUA, low solid content. [0004] CN103709312A discloses a method for preparing a hydroxyacrylic resin for recoatable polyurethane coatings. By introducing a monomer ACE with internal plasticizing effect into the polymer chain segmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/75C08G18/62C08G18/34C08G18/32C09D175/04C07C69/54C07C67/26C08F222/20C08F220/14C08F220/18C08F220/28C08F220/06C08F212/08C08F220/44
CPCC07C67/26C08F220/14C08F220/18C08F220/44C08G18/0823C08G18/348C08G18/6237C08G18/6541C09D175/04C07C69/54C08F220/282C08F212/08C08F220/281C08F220/06C08F220/1804
Inventor 周静静黄之祥黄晓峰李运德郭祥恩
Owner 北京红狮科技发展有限公司
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