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Multifunctional UV cured polyurethane vegetable oleate prepolymer, and preparation method and application thereof

A technology of vegetable oleate and vegetable oleate alcohol, applied in polyurea/polyurethane coatings, polyurea/polyurethane adhesives, applications, etc., can solve the problem that UV-cured polyurethane acrylate materials do not have biodegradability, etc., and achieve Good mechanical properties and mechanical properties, reduced use, and the effect of solving environmental pollution problems

Active Publication Date: 2017-09-22
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The Chinese invention patent applications whose publication numbers are CN105801791A, CN105566396A, CN103193678A, CN 102911338A etc. relate to the preparation of UV curable polyurethane acrylate, but none of them use vegetable oleate to replace acrylate to prepare UV curable polyurethane, so the UV curable Polyurethane acrylate materials do not have biodegradability, which is essentially different from the present invention

Method used

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  • Multifunctional UV cured polyurethane vegetable oleate prepolymer, and preparation method and application thereof
  • Multifunctional UV cured polyurethane vegetable oleate prepolymer, and preparation method and application thereof

Examples

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Embodiment 1

[0032] (1) Synthesis and separation and purification of tung oil ester alcohol: after heating 9mol tung oil to 60°C, add an alkaline solution of 1mol ethylene glycol, wherein the quality of the alkali is 1% of the tung oil quality, and under stirring conditions, reflux React for 80 minutes, then add an appropriate amount of acid to neutralize, let the reaction solution stand still, separate layers, and separate the lower glycerol layer; then wash the upper liquid with water, remove the lower water phase, and distill under reduced pressure to remove ethylene glycol and most of it. water, etc., and finally dry to obtain oleic acid ester alcohol;

[0033](2) Synthesis of castor oil-based PU prepolymer: Add 1 mol of polyethylene glycol (molecular weight: 1000) and 0.1 mol of castor oil to the reaction kettle in sequence, stir and heat up to 120°C, and dehydrate under reduced pressure for 2.5 hours Cool down to 65°C, then add a mixture of 1 mol of hexamethylene diisocyanate and an ...

Embodiment 2

[0036] (1) Synthesis and separation and purification of soybean oil ester alcohol: after the soybean oil of 6mol is heated to 80 ℃, add the alkaline solution of the ethylene glycol of 1mol, wherein the quality of alkali is 2% of tung oil quality, in stirring Under the conditions, reflux for 50 minutes, then add an appropriate amount of acid to neutralize, let the reaction solution stand still, separate layers, and separate the lower glycerol layer; then wash the upper liquid with water, remove the lower aqueous phase, and distill under reduced pressure to remove ethylene glycol. Alcohol and most of the water, etc., and finally dried to obtain soybean oleic acid ester alcohol;

[0037] (2) Synthesis of castor oil-based PU prepolymer: Add 1.1 mol polypropylene glycol (molecular weight: 3000) and 0.011 mol castor oil to the reaction kettle in sequence, stir and heat up to 125°C, dehydrate under reduced pressure for 2 hours, then cool down to 65°C , then add a mixture of 1mol hexa...

Embodiment 3

[0040] (1) Synthesis and separation and purification of sesame oil ester alcohol: after 8mol sesame oil is heated to 70 ℃, add the alkaline solution of the ethylene glycol of 1mol, wherein the quality of alkali is 1.5% of tung oil quality, under the condition of stirring, Reflux for 70 minutes, then add an appropriate amount of acid to neutralize, let the reaction solution stand still, separate layers, and separate the lower glycerin layer; then wash the upper liquid with water, remove the lower water phase, and distill under reduced pressure to remove ethylene glycol and large amounts. Part of the water, etc., and finally dried to obtain the sesame oil ester alcohol;

[0041] (2) Synthesis of castor oil-based PU prepolymer: Add 1 mol of polyethylene glycol (molecular weight: 2000) and 0.05 mol of castor oil to the reactor, stir and heat up to 125°C, and dehydrate under reduced pressure After 2 hours, cool down to 65°C, then add 1 mol of toluene diisocyanate and an appropriate...

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Abstract

The invention discloses a multifunctional UV cured polyurethane vegetable oleate prepolymer, and a preparation method and application thereof. According to the method, trifunctional UV cured polyurethane prepolymer is prepared from trifunctional castor oil, and a photosensitive monomer adopted by prepared UV cured polyurethane adopts vegetable oleate alcohol to replace traditional acrylic ester, so that the prepared UV polyurethane initiates polymerization and film formation in a UV light irradiation condition, in an aerobic condition without a photoinitiator or a cationic photoinitiator and radical photoinitiator compound initiating condition, and effectively overcomes the problem of oxygen inhibition. As vegetable oil is taken as a raw material, the prepared prepolymer has excellent biodegradability. The multifunctional UV cured polyurethane vegetable oleate prepolymer can be widely applied to various fields, such as UV cured paint, UV cured ink and UV cured adhesives.

Description

technical field [0001] The invention belongs to the field of UV-curable polymer materials, and in particular relates to a multifunctional UV-curable polyurethane vegetable oleate prepolymer and its preparation method and application. Background technique [0002] The matrix resin of traditional UV curing materials mainly includes photosensitive resins such as epoxy acrylate, polyurethane acrylate, and polyester acrylate. Acrylic esters are used in the preparation of these types of resins, and the photosensitive groups come from the double bonds in the acrylates, so the initiators used are free radical initiators. However, for free radical photoinitiation systems, oxygen inhibition has always been a difficult problem to solve. Oxygen inhibition is very harmful to the UV curing process, especially when the coating film thickness is thin. During the photoinitiation process, with the consumption of oxygen molecules in the curing system, the oxygen in the air on the surface of t...

Claims

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Application Information

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IPC IPC(8): C08G18/67C08G18/66C08G18/48C08G18/42C08G18/36C09D175/14C09D11/101C09J175/14
CPCC08G18/36C08G18/4238C08G18/48C08G18/4833C08G18/6662C08G18/6696C09D11/101C09D175/06C09D175/08C09D175/14C09J175/06C09J175/08C09J175/14
Inventor 袁腾杨卓鸿梁斌张超群周闯张淑婷
Owner SOUTH CHINA AGRI UNIV
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