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A kind of shape memory modified polyurethane resin and preparation method thereof

A polyurethane resin and polyurethane prepolymer technology, which is applied in the field of shape memory modified polyurethane resin and its preparation, can solve the problems of weather resistance, poor air permeability and moisture permeability, shape memory persistence and unsatisfactory mechanical strength, etc., and achieve the preparation The method is simple and easy to implement, improves thermal stability and mechanical strength, and improves the effect of shape memory ability

Active Publication Date: 2019-06-18
长兴材料工业(广东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the durability and mechanical strength of shape memory polyurethane materials are not ideal at present, and the weather resistance, air permeability and moisture permeability are still poor.

Method used

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  • A kind of shape memory modified polyurethane resin and preparation method thereof
  • A kind of shape memory modified polyurethane resin and preparation method thereof
  • A kind of shape memory modified polyurethane resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]An embodiment of the shape memory modified polyurethane resin of the present invention, the modified polyurethane resin described in this embodiment is prepared by the following method:

[0038] In the reaction vessel, add 0.005 parts by weight of graphene oxide and 10 parts by volume of xylene, stir evenly, add 50 parts by weight of alkyd resin, heat up to 180 ° C, and continue electric stirring for 1 hour to obtain alkyd resin-graphene oxide polymer , cooling standby;

[0039] Take 60 parts by weight of polyurethane prepolymer in another reaction vessel, add a little acetone, and disperse with electric stirring for 2 minutes, add 1 part by volume of triethylamine, 5 parts by weight of alkyd resin-graphene oxide, heat up to 80°C, and react for 1 hour , cooling and discharging;

[0040] Wherein, the parts by weight / volume=g / ml, the polyurethane prepolymer is toluene diisocyanate, the weight ratio of the soft segment and the hard segment is 1:0.5, and the molecular weigh...

Embodiment 2

[0042] An embodiment of the shape memory modified polyurethane resin of the present invention, the modified polyurethane resin described in this embodiment is prepared by the following method:

[0043] In the reaction vessel, add 0.01 parts by weight of graphene oxide and 18 parts by volume of xylene, stir evenly, add 65 parts by weight of alkyd resin, heat up to 200 ° C, and continue stirring for 2 hours to obtain alkyd resin-graphene oxide Polymer, cooling for standby;

[0044] Take 70 parts by weight of polyurethane prepolymer in another reaction vessel, add a little acetone, stir and disperse evenly, add 2 parts by volume of triethylamine, 8 parts by weight of alkyd resin-graphene oxide polymer, and heat up to 85°C , react for 2h, cool down and discharge;

[0045] Wherein, the parts by weight / volume=g / ml, the polyurethane prepolymer is diphenylmethane diisocyanate, the weight ratio of the soft segment and the hard segment is 1:0.7, and the molecular weight is 7000; the gr...

Embodiment 3

[0047] An embodiment of the shape memory modified polyurethane resin of the present invention, the modified polyurethane resin described in this embodiment is prepared by the following method:

[0048] In the reaction vessel, add 0.015 parts by weight of graphene oxide and 20 parts by volume of xylene, stir evenly with electric motor, add 78 parts by weight of alkyd resin prepolymer, raise the temperature to 210°C, and continue stirring for 2 hours to obtain alkyd resin-graphite oxide vinyl polymer, spare;

[0049] Put 80 parts by weight of polyurethane prepolymer in another reaction vessel, add a little acetone, stir and disperse evenly, add 4 parts by volume of triethylamine, 15 parts by weight of alkyd resin-graphene oxide, heat up to 80 ° C, react for 2 hours, and produce material;

[0050] Wherein, the parts by weight / volume=g / ml, the polyurethane prepolymer is hexamethylene diisocyanate, the weight ratio of the soft segment and the hard segment is 1:0.8, and the molecul...

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Abstract

The invention discloses a method for preparing shape memory modified polyurethane resin. The method comprises the following steps: (1) adding graphene oxide into a reaction container, adding alkyd resin and dispersant, uniformly stirring, heating to 180-240 DEG C, and continuously stirring for 1-2 hours to obtain an alkyd resin-graphene oxide polymer; (2) stirring and dispersing a polyurethane prepolymer in the reaction container, adding a chain extender and the alkyd resin-graphene oxide polymer obtained in the step (1), heating to 75-85 DEG C, reacting for 1-2 hours, cooling and discharging to obtain the shape memory modified polyurethane resin. The shape memory modified polyurethane resin prepared by the preparation method is temperature and pressure dual-response weather-proof shape memory resin, and can keep shape memory in a temperature range of 0-100 DEGC and / or a pressure range of 100Pa and 10KPa.

Description

technical field [0001] The invention relates to the field of shape-memory polymer resins, in particular to a shape-memory modified polyurethane resin and a preparation method thereof. Background technique [0002] Shape memory materials refer to materials that can sense the stimuli of environmental changes such as temperature, force, electromagnetic, solvent, etc., adjust and memorize their state parameters, and return to their preset states. It has become a hot spot in the research of smart materials in recent years. Among them, the shape memory polymer material (SMP) has the characteristics of easy preparation, adjustable shape and temperature, and wide application compared with traditional shape memory alloys and shape memory ceramics, and has attracted more attention. [0003] The microphase structure of shape memory polymers must have the characteristics of microphase separation, including "stationary phase" and "reversible phase". The "reversible phase" changes shape w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/73C08G18/75C08G18/65C08G18/64C08G83/00
CPCC08G18/64C08G18/65C08G18/73C08G18/755C08G18/7614C08G18/7671C08G83/001C08G2280/00
Inventor 于爱华王磊
Owner 长兴材料工业(广东)有限公司