Aqueous photo-curing polyurethane resin and preparation thereof

A polyurethane resin, light-curing technology, used in polyurea/polyurethane coatings, polyurea/polyurethane adhesives, adhesive types, etc., can solve the health injury of construction workers, the odor of reactive diluents, and large volume shrinkage, etc. problems, to achieve the effect of shortening the reaction time, good hydrophilicity and photocurability, and high hardness of the film-forming material

Active Publication Date: 2009-02-25
CHINA ACADEMY OF ENG PHYSICS FUNCTION MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the reactive diluents are acrylate monomers. The coating film obtained by this method shrinks greatly after curing and has poor adhesion. Moreo...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Preparation of waterborne photocurable polyurethane resin.

[0062] The ratio is as follows:

[0063] Isophorone diisocyanate: 111.5g

[0064] Polyether diol: 125g

[0065] Dimethylolpropionic acid: 13.4g

[0066] Glycerol: 1.6g

[0067] Hydroxyethyl methacrylate: 35g

[0068] Triethylamine: 10g

[0069] N-Methylpyrrolidone: 24g

[0070] Distilled water: 50g

[0071] Preparation process: Add 1.6g of glycerol, 125g of polyether diol and 33.5g of bismethylolpropionic acid into the reaction bottle, stir continuously and raise the temperature to 90-95°C, after it is completely melted, add 111.15g of isophor 10 drops of ketone diisocyanate (IPDI) and catalyst were passed through nitrogen for 10 minutes and reacted for 5 hours. Add 20g of N-methylpyrrolidone to reduce viscosity, then add 35g of β-hydroxyethyl methacrylate, and react for 3 hours. Cool down to room temperature, add 10 g of triethylamine dropwise, react for 30 minutes, add 50 g of distilled water under ...

Embodiment 2

[0073] If other conditions in Example 1 remain unchanged, 111.5g isophorone diisocyanate is changed to 167.3g, and 35g hydroxyethyl methacrylate becomes 63.7g, also can obtain ultraviolet curing water-based polyurethane resin, and its molecular weight changes Small, the brittleness of the paint film increases.

Embodiment 3

[0075] The formula of water-based photocurable polyurethane resin is as follows:

[0076] Hexamethylene diisocyanate: 84g

[0077] Polyester diol: 125g

[0078] Pentaerythritol: 3.4g

[0079] Dimethylolpropionic acid: 13.4g

[0080] Hydroxyethyl acrylate: 58g

[0081] Triethylamine: 10g

[0082] N-Methylpyrrolidone: 20g

[0083] Distilled water: 50g

[0084] Add 84g hexamethylene diisocyanate (HDI), 3.4g pentaerythritol, 125g polyester diol, 13.4g dimethylol propionic acid, 20g N-methylpyrrolidone in the reaction flask. Stir continuously and heat up to 90°C, and react for 6 hours. Then add 58g β-hydroxyethyl methacrylate and react for 4 hours. The temperature was lowered to room temperature, 10 g of triethylamine was added dropwise, and 50 ml of distilled water was added under vigorous stirring. The aqueous polyurethane resin aqueous dispersion is a transparent or translucent liquid with a solid content of 85%.

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Abstract

The invention relates to a method for preparing waterborne light-cured urethane resin. The waterborne light-cured urethane resin consists of polyatomic alcohol components, diisocyanate, hydroxyl (methyl) acrylic ester, a neutralizer, a catalyst, a solvent, a polymerization inhibitor and water. The target resin is prepared by one-step solution polymerization or bulk polymerization, and the preparation method is simple and easily operated. The densities of the light-curable group and hydrophilic group of the resin prepared are adjustable, and the resin has the advantages of unique hydrophilicity, superior light curing performance and high hardness of film forming matters, and has wide application prospect in the fields of coating, adhesives, ink, etc.

Description

technical field [0001] The invention belongs to the technical field of coatings and adhesives, and in particular relates to a preparation method of a polyurethane resin with water solubility or water dispersibility, high and adjustable double bond density and excellent photocuring performance. Background technique [0002] Polyurethane resin is widely used in coatings and bonding due to its excellent adhesive properties, good chemical resistance, water resistance and solvent resistance, outstanding wear resistance and flexible operation. Traditional polyurethane resins usually contain a certain proportion of organic solvents, which can no longer meet the needs of today's increasingly serious environmental protection problems. In recent years, the polyurethane resin industry has changed from the original highly polluting solvent-based polyurethane resin to low-pollution or non-polluting water-based resin; on the other hand, the energy crisis is also one of the main problems f...

Claims

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Application Information

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IPC IPC(8): C08G18/67C08G18/12C09D175/14C09J175/14
Inventor 赵秀丽罗雪方白战争田春蓉黄奕刚罗世凯
Owner CHINA ACADEMY OF ENG PHYSICS FUNCTION MATERIAL RES INST
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