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A kind of wet process polyurethane resin with high astringency feeling and preparation method thereof

A wet-process polyurethane and astringent technology, which is applied in the field of high-astringency wet-process polyurethane resin and its preparation, can solve the problems of poor water absorption of synthetic rubber, slippery grip, poor hydrolysis resistance, etc., and achieves good hydrolysis resistance and improved water absorption. Good effect of sex and hydrophilicity

Active Publication Date: 2020-12-04
SHANGHAI HUIDE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Natural rubber has certain comfort, but the output is limited; rubber-plastic sponge feels soft, but its hydrolysis resistance is poor, and its performance will not only decrease after long-term use, but it is also easy to get dirty; Sweat or water stains on the hands will cause the grip to be slippery and affect people's use

Method used

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  • A kind of wet process polyurethane resin with high astringency feeling and preparation method thereof
  • A kind of wet process polyurethane resin with high astringency feeling and preparation method thereof
  • A kind of wet process polyurethane resin with high astringency feeling and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A component:

[0031] Diphenylmethane-4,4-diisocyanate 5kg;

[0032] Polyoxypropylene diol (number average molecular weight 3000g / mol) 95kg;

[0033] B component:

[0034]

[0035] 1) Preparation of component A: Put 95kg of polyoxypropylene glycol and 5kg of MDI into the reaction kettle, and the reaction temperature is 100-120°C. After 3-4 hours of reaction in an inert gas atmosphere, it is measured that the NCO of the system is zero. Material, namely get A component.

[0036] 2) Preparation of component B: Prepolymerize 118kg of polytetrahydrofuran diol, 59kg of polyadipate polyester diol, 18.68kg of MDI and 347kg of DMF at a reaction temperature of 75-85°C for 2-4 hours. When the viscosity reaches 50°C, after 200-220Pa·s, put in 13.92kg of ethylene glycol, 17.7kg of polyoxyethylene glycol, 395kg of DMF, stir evenly and put in 54.4kg of MDI, control the reaction temperature at 75-85°C, and react for 1-2 hours , add the remaining amount of MDI in batches, and rea...

Embodiment 2

[0039] A component:

[0040] Diphenylmethane-4,4-diisocyanate 1.53kg;

[0041] Polyoxypropylene diol (number average molecular weight 4000g / mol) 49kg;

[0042] B component:

[0043]

[0044]

[0045] 1) Preparation of component A: Put 49kg of polyoxypropylene glycol and 1.53kg of MDI into the reactor, the reaction temperature is 100-120°C, and the reaction is carried out in an inert gas atmosphere for 3-4 hours, and the NCO of the system is measured to be zero. The material is discharged, and the A component is obtained.

[0046] 2) Preparation of component B: Prepolymerize 100kg of polytetrahydrofuran diol, 100kg of polyadipate polyester diol, 21.5kg of MDI and 275kg of DMF at a reaction temperature of 75-85°C for 2-4 hours. When the viscosity reaches 50°C, after 240-260Pa·s, put in 13.42kg of ethylene glycol, 25kg of polyoxyethylene glycol, 416kg of DMF, stir well and put in 54.3kg of MDI, control the reaction temperature at 75-85°C, and react for 1-2 hours. Add th...

Embodiment 3

[0049] A component:

[0050] Diphenylmethane-4,4-diisocyanate 4.875kg;

[0051] Polyoxypropylene diol (number average molecular weight 2000g / mol) 65kg;

[0052] B component:

[0053]

[0054] 1) Preparation of component A: Put 65kg of polyoxypropylene glycol and 4.875kg of MDI into the reactor, the reaction temperature is 100-120°C, and the reaction is carried out in an inert gas atmosphere for 3-4 hours, and the NCO of the system is measured to be zero. The material is discharged, and the A component is obtained.

[0055] 2) Preparation of component B: Prepolymerize 132kg of polytetrahydrofuran diol, 88kg of polyadipate polyester diol, 21.1kg of MDI and 393kg of DMF at a reaction temperature of 75-85°C for 2-4 hours. When the viscosity of the liquid reaches 50°C, after 200-220Pa·s, put in 13.8kg of ethylene glycol, 24.4kg of polyoxyethylene glycol, 329kg of DMF, stir evenly and put in 54kg of MDI, control the reaction temperature at 75-85°C, and react for 1-2 hours , add...

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PUM

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Abstract

The invention relates to high-unsmooth-feeling wet-process polyurethane resin and a preparation method thereof. The high-unsmooth-feeling wet-process polyurethane resin comprises an A component and aB component, wherein the A component comprises polypropylene oxide glycol and diphenylmethane-4,4'-diisocyanate; and the B component comprises polytetramethylene ether glycol, polyadipate-based polyester diol, polypropylene oxide glycol, ethylene glycol, diphenylmethane-4,4'-diisocyanate, and N,N-dimethylformamide. The high-unsmooth-feeling wet-process polyurethane resin provided by the inventionis mostly used for a wet-process base which has unsmooth and water absorption requirements, has the characteristics of good film forming performance, high strength, a good unsmooth feeling and good water absorption, and can be used for preparing products such as grip leather and Yoga mats.

Description

technical field [0001] The invention relates to the technical field of polyurethane resin preparation, and more specifically relates to a high-astringency wet-process polyurethane resin with strong astringency, good film-forming properties and good water absorption and a preparation method. Background technique [0002] With the improvement of people's living standards, more and more people are gradually transitioning from just focusing on basic necessities of life to paying attention to their own health, hoping to ensure a better physical condition through sports and exercise. In the synthetic leather industry, more and more companies have begun to apply synthetic leather products to sports equipment, such as badminton rackets, tennis rackets, yoga mats, fitness equipment, etc. [0003] Take the grip leather as an example. At present, the grips of most sports equipment on the market are made of natural rubber, synthetic rubber, rubber-plastic sponge and other materials. Na...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/08C08G18/76C08G18/66C08G18/48C08G18/42C08G18/32C08G18/12
CPCC08G18/12C08G18/4018C08G18/4238C08G18/4825C08G18/4833C08G18/4854C08G18/7671C08L75/08C08L2205/025C08G18/48C08G18/3206
Inventor 钱建中钱洪祥巩倩赵立朋尹小婷
Owner SHANGHAI HUIDE TECH CO LTD