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Aqucous polyurethane modified from vinyl resin possessing structure of bisphenol A and its preparing process

A water-based polyurethane and vinyl resin technology, applied in the field of epoxy resin-modified water-based polyurethane, can solve the problems of limitation, poor storage stability of emulsion, affecting the scope of use, etc., to solve the problems of water resistance, poor compatibility, and storage The effect of poor stability

Inactive Publication Date: 2005-10-26
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

Due to the existence of hydrophilic groups in polyurethane macromolecules and some shortcomings of the resin itself, it has some shortcomings in water resistance, solvent resistance, weather resistance, etc., which affects this type of products to a certain extent. scope of use
Epoxy resin is often used in the modification of polyurethane materials due to its excellent properties such as good adhesion, chemical corrosion resistance, and high strength. However, due to the β-C in the epoxy group being affected by triethylamine, hydroxyl, water, etc. Nucleophilic reagents, oxygen atoms are attacked by protons or Lewis acid electrophiles to undergo a ring-opening reaction, resulting in poor storage stability of the emulsion, so the direct use of epoxy resin modified waterborne polyurethane resin is largely limited

Method used

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Examples

Experimental program
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Embodiment Construction

[0016] The vinyl resin modified waterborne polyurethane with bisphenol A structure consists of raw materials in parts by weight:

[0017] Hydrophilic, double bond-terminated polyurethane resin PUV: 100,

[0018] Vinyl resin with bisphenol A structure: 5-50,

[0019] Free radical polymerization initiator: 0.03-0.3.

[0020] Distilled water: 160-250

[0021] In specific implementation, the hydrophilic, double bond-terminated polyurethane resin PUV is synthesized by stepwise addition polymerization of macromolecules containing two or more active hydrogen functional groups and polyisocyanate, followed by chain extension and salt formation steps. Among them, the macromolecules containing two or more active hydrogen functional groups are polyether diols with a molecular weight between 400-4000, or polyester diols with a molecular weight between 400-4000, or between them Complex. As a compound, it can be a compound of polyether diols with a molecular weight between 400-4000, a co...

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Abstract

The present invention relates to a vinyl resin modified water polyurethane with bisphenol A structure and its preparation method. It is characterized by that its raw materal includes polyurethane resin with hydrophilicity and terminated bouble-bond, vinyl resin with bisphenol A structure and free radical polymerization initiator, and it is made up by adopting the following processes; fully mixing the above-mentioned two resins, dispersing distilled water to form uniform emulsion, drop-adding initiator to make polymerization reaction so as to obtain the invented product.

Description

Technical field: [0001] The invention relates to the technology of modifying waterborne polyurethane with epoxy resin. Background technique: [0002] Waterborne polyurethane is a new type of polyurethane system that uses water instead of organic solvents as the dispersion medium, and can be widely used in coatings, adhesives, leather finishing agents, fabric finishing agents, etc. Due to the existence of hydrophilic groups in polyurethane macromolecules and some shortcomings of the resin itself, it has some shortcomings in water resistance, solvent resistance, weather resistance, etc., which affects this type of products to a certain extent. range of use. Epoxy resin is often used in the modification of polyurethane materials due to its excellent properties such as good adhesion, chemical corrosion resistance, and high strength. However, due to the β-C in the epoxy group being affected by triethylamine, hydroxyl, water, etc. Nucleophilic reagents, oxygen atoms are attacked...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/02
Inventor 王平华伍胜利
Owner HEFEI UNIV OF TECH
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