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Solvent-free waterborne polyurethane resin and preparation method thereof

A water-based polyurethane and solvent-free technology, applied in the field of water-based polyurethane resin, can solve the problems of reducing prepolymers and achieve the effects of reducing the viscosity of the prepolymerization system, improving stability, and high universality

Inactive Publication Date: 2018-12-28
LUOYANG SHENGJIA CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method combines the advantages of anionic hydrophilic diols and nonionic hydrophilic diols, it can greatly reduce the viscosity of the prepolymer, but because of the limitation of the existing anionic hydrophilic diol structure, only in part Prepolymerization system has better viscosity reduction effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Prepolymerization

[0029] 120 parts of polybutylene adipate diols (M W , 2000), 16 parts of 2,2-dimethylol-3 methylbutanoic acid, 8 parts of ethylene glycol and 115 parts of isophorone diisocyanate (IPDI) were added to the reactor, and the reaction was stirred at 70~90 °C Obtain low viscosity prepolymer in 5 hours;

[0030] (2) into salt

[0031] Cool the system down to 40°C, add 10 parts of triethylamine to form a salt for 15 minutes;

[0032] (3) Decentralization and chain extension

[0033] Add 550 parts of deionized water under high-speed stirring, then add a mixed solution of 10 parts of ethylenediamine and 110 parts of water for chain extension, and then stir for 30 minutes at high speed. After the chain extension reaction is completed, the solvent is distilled off under reduced pressure to obtain a stable water-based polyurethane dispersion. liquid.

Embodiment 2

[0035] (1) Prepolymerization

[0036] Sequentially add 110 parts of polyhexamethylene adipate diol (M W , 2000), 20 parts of 2,2-dimethylol-3 methylbutanoic acid, 8 parts of non-ionic polyether diol (N120 product produced by Sweden PERSTORP company), 6 parts of ethylene glycol and 120 parts of isoflurane Add ketone diisocyanate (IPDI) into the reactor, and react at 70~90°C for 5 hours under stirring to obtain a low-viscosity prepolymer;

[0037] (2) into salt

[0038] Cool the system down to 40°C, add 10 parts of triethylamine to form a salt for 15 minutes;

[0039] (3) Decentralization and chain extension

[0040] Add 550 parts of deionized water under high-speed stirring, then add a mixed solution of 10 parts of IPDA, 5 parts of ethylenediamine and 110 parts of water to carry out chain extension, and then stir at high speed for 30 minutes. After the chain extension reaction is completed, the solvent is distilled off under reduced pressure to obtain Stabilized aqueous pol...

Embodiment 3

[0042] (1) Prepolymerization

[0043] 100 parts of polyoxypropylene ether diols (M W , 2000), 10 parts of 2,2-dimethylol-3 methylbutanoic acid, 7 parts of DMPA, 6 parts of 1,4-butanediol and 115 parts of isophorone diisocyanate (IPDI) were added to the reactor , 70~90°C stirring reaction for 5 hours to obtain a low-viscosity prepolymer;

[0044] (2) into salt

[0045] Cool the system down to 40°C, add 10 parts of triethylamine to form a salt for 15 minutes;

[0046] (3) Decentralization and chain extension

[0047] Add 550 parts of deionized water under high-speed stirring, then add a mixed solution of 16 parts of IPDA, 4 parts of ethylenediamine and 110 parts of water to carry out chain extension, and then stir at high speed for 30 minutes. After the chain extension reaction is completed, the solvent is distilled off under reduced pressure to obtain Stabilized aqueous polyurethane dispersion.

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PUM

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Abstract

The invention discloses a solvent-free waterborne polyurethane resin and a preparation method thereof. The solvent-free waterborne polyurethane resin comprises the following raw materials in parts byweight: 80-150 parts of polyester or polyether glycol, 1-25 parts of 2,2-dihydroxymethyl isovaleric acid (2,2-dihydroxymethyl-3-methyl butyrate), 0-10 parts of hydrophilic carboxyl dihydric alcohol, 0-15 parts of micromolecule dihydric alcohol, 0-10 parts of nonionic dihydric alcohol, 40-150 parts of diisocyanate, 1-20 parts of a salting agent, 0-30 parts of a diamine chain extender and 500-700 parts of deionized water. The resin is free of organic solvent in the preparation process, low in prepolymer viscosity and high in dispersion stability.

Description

technical field [0001] The invention relates to water-based polyurethane resin, in particular to the preparation of solvent-free water-based polyurethane. Background technique [0002] With the increasingly stringent national environmental protection policies and the enhancement of people's awareness of environmental protection and safety, for the water-based polyurethane industry, no matter in the production process of the product or in the use stage, it is required to try not to use solvents and the VOC of the product to be as zero as possible. In the traditional water-based polyurethane production process, solvents such as NMP, butanone and acetone need to be added as viscosity-reducing diluents. These solvents not only pollute the environment in the production process, but also pollute the environment or damage the base if they are not evaporated in the application process. Materials are affected, and if these solvents are evaporated, the cost will be greatly increased. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/44C08G18/42C08G18/34C08G18/32
CPCC08G18/3206C08G18/3212C08G18/3228C08G18/348C08G18/4238C08G18/4277C08G18/44C08G18/4825C08G18/4854C08G18/664C08G18/6651C08G18/6659C08G18/6674C08G18/6685C08G18/6692
Inventor 李延科
Owner LUOYANG SHENGJIA CHEM CO LTD
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