Vegetable oil-based polyols type biodegradable UV-curing adhesive and preparation method

A vegetable oil-based, polyol-based technology, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problems of curing materials that cannot be biodegraded, biodegradable performance, environmental hazards, etc., and achieve excellent reliability Biodegradability, solution to environmental pollution problems, effect of relieving pressure

Active Publication Date: 2017-12-01
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the raw materials of traditional UV curing materials are mainly acrylate monomers and polyols from petrochemical resources. The prepared curing mater

Method used

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  • Vegetable oil-based polyols type biodegradable UV-curing adhesive and preparation method
  • Vegetable oil-based polyols type biodegradable UV-curing adhesive and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] (1) Synthesis of vegetable oil-based PU prepolymer: Add 1 mol of vegetable oil-based polyol in sequence to the reaction kettle, stir and heat up to 115°C, dehydrate under reduced pressure for 2 hours and then cool down to 65°C, then add 1mol of hexamethylene Dibutyltin dilaurate and 0.01mol catalyzer dibutyltin dilaurate, pay attention to controlling the rate of addition, and preferably drop it in 2 hours. After 2 hours of reaction, take a sample to measure the -NCO group content until the theoretical value is reached, and the first step of reaction ends;

[0066] (2) Synthesis of UV-curable vegetable oil-based PUA prepolymer: the intermediate product obtained in step (1) is cooled to 55°C, and a mixture of 1mol hydroxyethyl acrylate and 0.02mol inhibitor p-hydroxyanisole is added under stirring , react for 3 hours, track the content of -NCO group, when the free -NCO content is lower than 0.1%, stop the reaction, steam the solvent and cool down the material, and obtain t...

Embodiment 2

[0071] (1) Synthesis of vegetable oil-based PU prepolymer: Add 1 mol of vegetable oil-based polyols into the reactor in sequence, stir and heat up to 125°C, dehydrate under reduced pressure for 3 hours, then cool down to 75°C, then add 1.2mol of toluene di The mixture of isocyanate and 0.03mol catalyst dibutyltin dilaurate, pay attention to control its drop rate, preferably drop it in 3h, after reacting for 4h, take a sample to measure the content of -NCO group until it reaches the theoretical value, and the first step reaction ends;

[0072] (2) Synthesis of UV-curable vegetable oil-based PUA prepolymer: the intermediate product obtained in step (1) is cooled to 45°C, and a mixture of 1.1mol hydroxypropyl acrylate and 0.01mol inhibitor p-hydroxyanisole is added under stirring. The mixture was reacted for 3 hours, and the content of the -NCO group was tracked. When the free -NCO content was lower than 0.1%, the reaction was stopped, the solvent was evaporated, the solvent was c...

Embodiment 3

[0076] (1) Synthesis of vegetable oil-based PU prepolymer: Add 1 mol of vegetable oil-based polyols into the reaction kettle sequentially, stir and heat up to 120°C, dehydrate under reduced pressure for 2.5 hours and cool down to 70°C, then add 1.05mol of The mixture of phenylene diisocyanate and 0.01mol catalyst dibutyltin dilaurate, pay attention to control the dropping rate, preferably drop it in 2.5h, after the reaction for 3h, take a sample to measure the -NCO group content until it reaches the theoretical value, and the first step reaction ends;

[0077] (2) Synthesis of UV-curable vegetable oil-based PUA prepolymer: the intermediate product obtained in step (1) is cooled to 45°C, and a mixture of 1mol hydroxybutyl acrylate and 0.01mol inhibitor p-hydroxyanisole is added under stirring , react for 2 hours, track the content of -NCO group, when the free -NCO content is lower than 0.1%, stop the reaction, steam the solvent and cool down the material, and obtain the vegetabl...

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Abstract

The invention belongs to the technical field of UV curing polymer materials, and discloses a vegetable oil-based polyol type biodegradable UV-curing adhesive and a preparation method thereof. The method comprises the following steps: (1) adding a mixture of diisocyanate and a catalyst into a vegetable oil-based polyol and heating for reaction to obtain a vegetable oil-based PU prepolymer; (2) cooling the prepolymer of step (1) to 45 to 55 DEG C, adding (methyl) acrylate hydroxyalkyl ester, and a polymerization inhibitor for reaction to obtain a UV curing vegetable oil-based PUA prepolymer; (3) uniformly mixing the UV curing vegetable oil-based PUA prepolymer of the step (2), a free radical light initiator, a reactive diluent, and an additive to obtain the vegetable oil-based polyol type biodegradable UV curing adhesive. Not only is UV curing realized, but also excellent biodegradability is realized, thereby fundamentally solving the problem of environmental pollution caused by the difficult biodegradation of adhesive type polymer materials.

Description

technical field [0001] The invention belongs to the technical field of UV curing polymer materials, and in particular relates to a vegetable oil-based polyol type biodegradable UV curing adhesive and a preparation method thereof. Background technique [0002] UV curing materials have been widely used due to their advantages of fast curing speed, low curing energy consumption and temperature, low VOC emission, and high crosslinking degree of cured film. However, the raw materials of traditional UV curing materials are mainly acrylate monomers and polyols from petrochemical resources. The prepared curing materials are completely non-biodegradable or have poor biodegradability, and long-term residues in nature will cause serious damage to the environment. great harm. Biodegradation of polymers is a process in which polymers can be decomposed into low molecules or small molecules by the action of organisms, microorganisms and enzymes under certain conditions and within a certai...

Claims

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Application Information

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IPC IPC(8): C09J175/14C08G18/10C08G18/36C08G18/67
CPCC08G18/10C08G18/36C08G18/672C09J175/14
Inventor 袁腾杨卓鸿梁斌张超群周闯杜国浩
Owner SOUTH CHINA AGRI UNIV
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