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A blocked two-component solvent-free waterproof and moisture-permeable polyurethane resin and its preparation method

A polyurethane resin, waterproof and moisture-permeable technology, which is applied in polyurea/polyurethane coatings, polyurea/polyurethane adhesives, adhesives, etc., can solve the problems of short storage time of mixtures and unstable performance of finished products, and achieve long storage time, Excellent washing resistance and the effect of improving moisture permeability

Active Publication Date: 2020-04-28
ZHEJIANG JOYA POLYMER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a patent report of a solvent-free two-component waterproof and moisture-permeable polyurethane resin, which is composed of a component with an isocyanate polymer and a polymer component with a hydroxyl group. The solvent-free two-component waterproof and moisture-permeable component is obtained through a mixing reaction. Wet polyurethane resin film, but its disadvantage is that the storage time of the mixture is short, and the performance of the finished product is unstable, especially in high temperature weather

Method used

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  • A blocked two-component solvent-free waterproof and moisture-permeable polyurethane resin and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Preparation of component A: in parts by weight, put 60 parts of toluene isocyanate (TDI-80), 90 parts of 4,4-diphenylmethane diisocyanate MDI, and 0.1 parts of antioxidant into the reaction kettle at 40 °C Stir evenly, put 140 parts of neopentyl glycol polyester polyol with a molecular weight of 2000 into the reactor and react at 60-70°C for 2 hours, then put 100 parts of polytetrahydrofuran polyol with a molecular weight of 1500 into the reactor. React at 60-70°C for 2 hours, then put 300 parts of polyoxyethylene polyol with a molecular weight of 2000 into the reactor and react at 60-70°C for 4 hours, after the reaction until the residual NCO reaches the theoretical value, add 65 parts of butanone oxime React with 0.1 part of organic bismuth catalyst at 70-80°C until no residual NCO is present, and then discharge. (2) Preparation of component B: in parts by weight, 40 parts of diethylenetriamine and 60 parts of isophoronediamine were uniformly mixed. (3) Mix compo...

Embodiment 2

[0018] (1) Preparation of Component A: In parts by weight, 70 parts of toluene isocyanate (TDI-80), 85 parts of 4,4-diphenylmethane diisocyanate MDI, and 0.15 parts of antioxidant were put into the reactor at 45°C Stir evenly inside, put 110 parts of neopentyl glycol polyester polyol with a molecular weight of 1500 into the reactor and react at 60-70°C for 2.5 hours, then put 150 parts of polytetrahydrofuran polyol with a molecular weight of 2000 into the reactor. React at 60-70°C for 2.5 hours, then put 380 parts of polyoxyethylene polyol with a molecular weight of 2500 into the reactor and react at 60-70°C for 5 hours, add 70 parts of butanone oxime after the reaction until the residual NCO reaches the theoretical value React with 0.12 parts of organic bismuth catalyst at 70-80°C until no residual NCO is present, and then discharge. (2) Preparation of component B: in parts by weight, 60 parts of diethylenetriamine and 40 parts of isophoronediamine were uniformly mixed. (3) ...

Embodiment 3

[0020] (1) Preparation of component A: in parts by weight, put 80 parts of toluene isocyanate (TDI-80), 90 parts of 4,4-diphenylmethane diisocyanate MDI, and 0.2 parts of antioxidant into the reactor at 50°C Stir evenly inside, put 250 parts of neopentyl glycol polyester polyol with a molecular weight of 3000 into the reactor and react at 60-70°C for 3 hours, then put 300 parts of polytetrahydrofuran polyol with a molecular weight of 3000 into the reactor. React at 60-70°C for 3 hours, then put 900 parts of polyoxyethylene polyol with a molecular weight of 3000 into the reactor and react at 60-70°C for 6 hours, after the reaction until the residual NCO reaches the theoretical value, add 80 parts of butanone oxime React with 0.3 parts of organic bismuth catalyst at 70-80°C until no residual NCO is present, and then discharge. (2) Preparation of component B: in parts by weight, 70 parts of diethylenetriamine and 30 parts of isophoronediamine were uniformly mixed. (3) Mix compon...

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Abstract

The invention relates to the technical field of polyurethane resin preparation, in particular to blocked double-component, solvent-free, waterproof and moisture-permeable polyurethane resin and a preparation method thereof. The blocked double-component, solvent-free, waterproof and moisture-permeable polyurethane resin comprises components A and B, wherein the component A is prepared from toluene isocyanate, 4,4-diphenylmethane diisocyanate, an antioxidant, neopentyl glycol polyester polyol, polytetrahydrofuran polyol, polyoxyethylenepolyol, an organic bismuth catalyst and diacetylmonoxime through reactions; the component B is a mixture of diethylenetriamine and isophorone diamine, and the weight percentage of diethylenetriamine is 40%-70%; the weight ratio of the component A to the component B is 1:(0.05-0.1). The waterproof and moisture-permeable polyurethane resin has long storage time and stable finished product performance and has excellent moisture permeability, hydraulic pressure resistance and wash resistance.

Description

technical field [0001] The invention relates to the technical field of polyurethane resin preparation, in particular to a waterproof and moisture-permeable polyurethane resin and a preparation method thereof. Background technique [0002] Waterproof and moisture-permeable fabric is a kind of fabric that can prevent the penetration of rainwater and discharge sweat vapor. There will be no condensation in the jacket, which will cause dampness and discomfort. Moisture permeability means that the steam released by the body during strenuous exercise will evaporate to the outside through the body surface to achieve a cooling effect and maintain excellent comfort and dryness; waterproofness means that the fabric has the ability to completely resist the penetration of water. This kind of waterproof and moisture-permeable fabric is usually coated with PU, Teflon film (PTFE), TPU, TPE, etc. on the surface of the fabric or laminated with film. [0003] At present, there are many studie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/12C08G18/40C08G18/42C08G18/48C08G18/66C08G18/32C09D175/06C09D175/08C09J175/06C09J175/08D06N3/14
CPCC08G18/12C08G18/4018C08G18/42C08G18/4804C08G18/4833C08G18/4854C08G18/6618C09D175/06C09D175/08C09J175/06C09J175/08D06N3/146C08G18/3228C08G18/3234
Inventor 贝文理钱伟伟
Owner ZHEJIANG JOYA POLYMER TECH
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