Super-soft high-elasticity hydrolysis resistance high-stripping wet polyurethane resin and preparation method thereof

A polyurethane resin and high-elasticity technology, applied in the field of polyurethane resin, can solve the problems of low modulus and high strength, and achieve the effects of high peel strength, good hydrolysis resistance and uniformity.

Active Publication Date: 2014-11-12
HEFEI ANLI POLYURETHANE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult for the existing polyurethane resin to take into account the three characteristics of low modulus, good elasticity and high strength.

Method used

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  • Super-soft high-elasticity hydrolysis resistance high-stripping wet polyurethane resin and preparation method thereof
  • Super-soft high-elasticity hydrolysis resistance high-stripping wet polyurethane resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Raw materials and ratio:

[0054]

[0055] 1) Add 750kg of SP-1, 370kg of PTMG-2, 50kg of HTPB-2 and 3kg of antioxidant I-1010 into the organic solvent DMF to form a solution with a solid content of 30%; stir well and then add 130- 140kg of isocyanate was reacted at 45-50°C for 1-2 hours; then the remaining 400kg of PTMG-1 was added to continue the reaction for 2 hours, and then 100-120kg of isocyanate was added to make the hydroxyl group in the polyol compound and the isocyanate group in the diisocyanate The molar ratio is 1:1.5; finally react at 65°C to obtain a prepolymer with a solid content of 55% and a viscosity of 80 Pa·s / 75°C;

[0056] 2) Add 100 kg of chain extender EG, 360-390 kg of isocyanate and 0.2 kg of organic bismuth catalyst (BiCAT? 8106, produced by a leading American chemical company) to the prepolymer, stir evenly, and continue at 75-85°C React for 2-5 hours. During the reaction, the organic solvent is continuously added as the viscosity of the s...

Embodiment 2

[0059] 1. Raw material and ratio:

[0060]

[0061]1) Add 600kg of SP-1, 400kg of PPG-2, 200kg of PPG-1 and 3kg of antioxidant I-1010 into the organic solvent DMF to form a solution with a solid content of 20%; stir well and then add 130 -150kg of isocyanate was reacted at 45°C for 1 hour; then the remaining 30kg of HTPB-1 was added to continue the reaction for 1 hour, and then 50-60 kg of isocyanate was added to make the molar ratio of the hydroxyl group in the polyol compound to the isocyanate group in the diisocyanate 1:1.5; finally react at 55°C to obtain a prepolymer with a solid content of 45% and a viscosity of 30Pa·s / 75°C;

[0062] 2) Add 100 kg of chain extender EG, 360-390 kg of isocyanate and 0.2 kg of organic bismuth catalyst (BiCAT? 8106, produced by a leading American chemical company) to the prepolymer, stir well, and continue to react at 75°C for 2 hours During the reaction process, the organic solvent is continuously replenished as the viscosity of the sys...

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Abstract

The invention discloses super-soft high-elasticity hydrolysis resistance high-stripping wet polyurethane resin and a preparation method of the super-soft high-elasticity hydrolysis resistance high-stripping wet polyurethane resin. The super-soft high-elasticity hydrolysis resistance high-stripping wet polyurethane resin is composed of isocyanate, a polyhydric alcohol compound, a chain extender, antioxygen, reaction terminating agent methyl alcohol and catalyst by weight. The additive amount is 0.001%-0.05% of the mass of the polyhydric alcohol compound. The number-average molecular weight of the polyhydric alcohol compound is 1000-3000. The polyhydric alcohol compound is composed of polyester polyol, polyether polyol and polyene polyhydric alcohol, wherein the mass ratio of the polyester polyol, the polyether polyol and the polyene polyhydric alcohol is 1:0.8-1.2:0.1-0.3. The total molar ratio of NCO in the isocyanate to the hydroxyl in the polyhydric alcohol compound and the chain extender is 0.9-1:1. The molar ratio of the polyhydric alcohol compound and the chain extender is 1:1.3-1.7. The super-soft high-elasticity hydrolysis resistance high-stripping wet polyurethane resin greatly solves the problem that soft resin can not achieve high elasticity and high stripping strength at the same time, is durable in use and has market competitiveness.

Description

[0001] technical field [0002] The invention relates to a polyurethane resin, in particular to an ultra-soft, high-elastic, hydrolysis-resistant and high-peeling wet-type polyurethane resin and a preparation method thereof. [0003] Background technique [0004] Due to limited leather resources and high prices, it cannot meet the growing market demand. Polyurethane synthetic leather products have a wide range of raw materials, cheap prices, and good processing performance. They have reached or exceeded the characteristics of natural leather and fully meet people's life pursuits. Polyurethane synthetic leather products have a wide range of raw materials, cheap prices, and good processing performance, which can meet people's life pursuits. The application of polyurethane resin in synthetic leather is mainly reflected in many fields such as clothing, bags, shoes, furniture, automobiles, etc. In recent years, the development speed of polyurethane resin for leather is getting ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/69C08G18/48C08G18/42C08G18/32C08K5/134C08K5/13
CPCC08G18/12C08G18/282C08G18/4238C08G18/4825C08G18/4854C08G18/6588C08G18/6674C08G18/698C08G18/7671C08G18/3206
Inventor 李震武春余惠坚强张彪
Owner HEFEI ANLI POLYURETHANE NEW MATERIAL
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