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Polyurethane resin, and preparation method and application thereof

A technology of polyurethane resin and polyester diol, applied in the field of polyurethane resin and its preparation, can solve the problems such as loss of drape of superfine fiber synthetic leather, and achieve the effect of improving performance

Inactive Publication Date: 2013-12-18
XUCHUAN CHEM SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Precisely due to the good resilience of polyurethane, the superfine fiber synthetic leather loses the drape feeling of real leather

Method used

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  • Polyurethane resin, and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The synthesis of embodiment 1 polyester diol BEPD2000

[0036]Put 100g of adipic acid and 61.5g of 2-butyl-2-ethyl-1,3-propanediol (BEPD) into the reaction kettle, turn on nitrogen, raise the temperature to 90-100°C, start stirring, and heat up to 150-160°C Start to produce water, keep the temperature for 2 hours, then continue to heat up to 220-230°C, after the water output reaches 24g, start vacuuming, until the hydroxyl value (55-57mgKOH / g) and acid value (<0.5) pass, stop vacuuming, and Lower the temperature, and discharge the material after the temperature drops below 120°C.

[0037] The obtained dihydric alcohol is named: BEPD2000.

[0038] The actual detection result of BEPD2000 among the embodiment 1 is:

[0039] Hydroxyl value: 56.3mgKOH / g;

[0040] Acid value: 0.3mgKOH / g.

Embodiment 2

[0042] A polyurethane resin, made of the following components, wherein the mass percentages of each component are: polyol composition 20%, small molecule chain extender 1.1%, isocyanate 8.7%, solvent 70%, end-blocking agent 0.04% and Additive 0.16%. The polyol composition comprises polytetrahydrofuran diol and polyester diol, and the polyester diol is adipic acid and 2-butyl-2-ethyl-1,3-propanediol (BEPD) passed through high temperature The polyester diol BEPD2000 formed by dehydration polycondensation, wherein the contents of tetrahydrofuran diol (PTMG) and BEPD2000 are both 50% of the total weight of the polyol composition, and the molecular weight of the polyester diol is 1500. The dibasic acid is adipic acid, and the dibasic alcohol is 2-butyl-2-ethyl-1,3-propanediol. The small molecule chain extender is ethylene glycol, the isocyanate is 4,4-diphenylmethane diisocyanate, the solvent is N,N-dimethylformamide (DMF), and the blocking agent is Methanol and the additives are...

Embodiment 3

[0045] A polyurethane resin, made of the following components, wherein the mass percentages of each component are: polyol composition 24%, small molecule chain extender 1.5%, isocyanate 7.38%, solvent 67%, end-blocking agent 0.05% and Additive 0.07%. The polyol composition comprises polytetrahydrofuran diol and polyester diol, and the polyester diol is adipic acid and 2-butyl-2-ethyl-1,3-propanediol (BEPD) passed through high temperature The polyester diol BEPD2000 formed by dehydration polycondensation, wherein the contents of tetrahydrofuran diol (PTMG) and BEPD2000 are both 50% of the total weight of the polyol composition, and the molecular weight of the polyester diol is 3000. The dibasic acid is adipic acid, and the dibasic alcohol is 2-butyl-2-ethyl-1,3-propanediol. The small molecule chain extender is ethylene glycol, the isocyanate is 4,4-diphenylmethane diisocyanate, the solvent is N,N-dimethylformamide (DMF), and the blocking agent is Methanol and the additives ar...

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Abstract

The invention discloses a polyurethane resin which is prepared from the following components in percentage by mass: 20-24% of polyalcohol composition, 1.1-1.5% of small molecule chain extender, 6.6-8.7% of isocyanate, 66-70% of solvent, 0.04-0.05% of blocking agent and 0.07-0.16% of assistant. The invention also discloses a preparation method and application of the polyurethane resin. The polyurethane resin disclosed by the invention has the characteristics of high softness, slow rebound, hydrolysis resistance, hot toluene resistance and the like; and the ultrafine fiber synthetic leather produced from the soft slow-rebound polyurethane resin has favorable sense of weeping, and is used for clothing leather.

Description

technical field [0001] The invention belongs to the technical field of polyurethane synthetic materials, and in particular relates to a polyurethane resin and its preparation method and application. Background technique [0002] Polyurethane is a new type of synthetic material. Due to its special molecular structure, it combines the high elasticity of rubber and the high strength of plastic. Therefore, it has developed rapidly in recent decades in terms of application range and usage quantity. [0003] Microfiber synthetic leather is a kind of artificial synthetic leather made of bundled microfiber and polyurethane composite through special processing. At present, the most commonly used process for the production of ultrafine fibers is: first, through two-component blend spinning, using the difference in melting point and viscosity to form a special fluid, cooling at a certain temperature after spinning through a special spinneret, and using their melting point , Viscosity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/44D06N3/14B32B27/02B32B27/08
Inventor 夏佳弟吕华波江平
Owner XUCHUAN CHEM SUZHOU
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