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A kind of solid semi-crystalline unsaturated polyurethane prepolymer and preparation method thereof

A polyurethane prepolymer, unsaturated technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of material filamentation, filamentous appearance and material adhesion, etc., to achieve guaranteed The effect of the curing effect

Active Publication Date: 2018-10-16
GUANGZHOU KINTE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN201410005541.3 Polyolefins, softeners, etc. are used to obtain plastic elastomers in thermoplastic polyurethane elastomers. Polyolefins include maleic anhydride grafted styrene-ethylene-butylene-styrene copolymer (MA-g-SEBS) and the like as The main elastomer component, but a large amount of polyolefin is used as a molding material component, which will lead to unsatisfactory filamentation, filamentous appearance and material adhesion of the material during melt extrusion

Method used

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  • A kind of solid semi-crystalline unsaturated polyurethane prepolymer and preparation method thereof
  • A kind of solid semi-crystalline unsaturated polyurethane prepolymer and preparation method thereof
  • A kind of solid semi-crystalline unsaturated polyurethane prepolymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Keep nitrogen and stirring state, add 84.1g hexamethylene diisocyanate monomer (HDI), 0.05g dibutyltin dilaurate catalyst and 0.01g hydroquinone monomethyl ether polymerization inhibitor In a nitrogen-filled reactor, slowly heat up to 60°C, slowly add 29.5g of 1,6-hexanediol (1,6-HDO) dropwise, and control the rate of addition during the dropping process to prevent the temperature of the reaction system from exceeding 80°C, slowly heat up to 120°C, keep warm for 1-2 hours to complete the first-stage reaction; slowly drop 44.1g of vinyl glycol ether (EGVE) into the first-stage reaction system, and control the rate of addition during the dropping process to prevent the temperature of the reaction system from exceeding 130°C ; After adding vinyl glycol ether, slowly raise the temperature and keep the temperature at 150°C~160°C, keep it warm for 1 hour and then discharge. After cooling at room temperature, it will be a milky white brittle hard substance with a melting range ...

Embodiment 2

[0032] Keep nitrogen and stirring state, add 67.3g hexamethylene diisocyanate monomer (HDI), 0.04g dibutyltin dilaurate catalyst and 0.01g hydroquinone monomethyl ether polymerization inhibitor In a reaction kettle with nitrogen gas, slowly raise the temperature to 60°C, slowly add 6.2g of ethylene glycol dropwise, control the dropping rate during the dropping process to prevent the temperature of the reaction system from exceeding 80°C, slowly raise the temperature to 120°C, and keep warm for 1-2 hours to complete the first step. stage reaction; slowly add 52.9g of vinyl glycol ether (EGVE) dropwise into the first stage reaction system, and control the rate of addition during the dropping process to avoid the temperature of the reaction system from exceeding 125°C; after the addition of vinyl glycol ether, slowly Raise the temperature and keep the temperature at 125°C~130°C, keep it warm for 1 hour, and discharge the material. After cooling at room temperature, it is a white, ...

Embodiment 3

[0034] Keep nitrogen and stirring state, 108.1g hexamethylene diisocyanate monomer (HDI), 40.3g 2,4-diphenylmethane diisocyanate monomer (2,4-MDI), dibutyltin dilaurate catalyst 0.07g and 0.01g of hydroquinone monomethyl ether polymerization inhibitor were simultaneously added to a reactor with a stirring paddle that could pass through nitrogen, and the temperature was slowly raised to 60°C, and 12.2g of 1,6-hexanediol (1.6- HDO), the dropping process controls the dropping rate to avoid the temperature of the reaction system exceeding 80°C, slowly warming up to 120°C, and keeping warm for 1-2 hours to complete the first stage reaction; slowly drop 123.8g of vinyl glycol ether (EGVE) into In the first stage of the reaction system, the dropping rate is controlled during the dropping process to prevent the temperature of the reaction system from exceeding 125°C; after the addition of vinyl glycol ether, the temperature rises slowly and the temperature is kept at 120°C-125°C. Whit...

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Abstract

The invention discloses a solid-state hypocrystalline unsaturated polyurethane prepolymer and a preparation method thereof. The melting range of the polyurethane prepolymer ranges from 50 DEG C to 145 DEG C, the melt viscosity is smaller than or equal to 100 mpa*s, the number-average molecular weight ranges from 250 to 5000, the unsaturation degree is 0.3-6 mmol / g, and the solid-state hypocrystalline unsaturated polyurethane prepolymer is prepared through reaction with alkyl-chain-base dihydric alcohol, polyisocyanate and unsaturated alcohol and ether stop ends being reaction substances and NCO / OH equivalence ratio being 0.8-1.2. The prepolymer is a solid-state polyurethane prepolymer meeting the construction characteristic requirement, the melting range of the solid-state polyurethane prepolymer is 50-145 DEG C, the prepolymer has good stability in the storage process and has low enough melt viscosity, and therefore when the prepolymer and resin components containing the prepolymer are applied to the surface of a base material, excellent levelling property is achieved, and the unsaturation degree of a resin system is effectively compensated for in the light / heat curing process.

Description

technical field [0001] The invention relates to the field of end-capped polyurethane prepolymers and the field of semi-crystalline solid phase of polyurethane prepolymers, in particular to solid semi-crystalline unsaturated polyurethane prepolymers, and to a preparation method of the prepolymers. Background technique [0002] End-blocked polyurethane prepolymers are currently mainly reported as coating components, such as US5,155,154, US4,977,201, US5,087,664, EP884341, EP 583377, US5,741,824, JP2003-268302, WO2008 / 049857, WO2006 / 007273 and WO2011 / 069969, etc., but these polyurethane prepolymers exist in a liquid or highly viscous state, and their scope of application is limited to the fields of adhesives, liquid coatings, etc., and are not suitable for low-viscosity or Unsaturated light / heat curing applications for solid state systems. [0003] Light / heat curing powder coatings are environmentally friendly coatings with broad market prospects. Light / heat curing powder coa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/67C08G18/32C08G18/12C09D175/14
CPCC08G18/12C08G18/3206C08G18/6715C08G2150/20C09D175/14
Inventor 陆均杰许振阳陈唯胡百九
Owner GUANGZHOU KINTE IND
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