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A preparation method of a polyurethane/epoxy resin composite material

A technology of epoxy resin and composite materials, applied in the direction of polyurea/polyurethane adhesives, adhesive types, adhesives, etc., which can solve the problems of reduced bond strength, limited adhesion and heat resistance, poor high temperature resistance, etc. problems, to achieve the effect of improving bonding performance, improving rigidity and comprehensive mechanical properties

Active Publication Date: 2014-01-22
太原英可奥笔墨科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The synthetic soft segments of existing polyurethane adhesives are mainly provided by polyether or polyester polyol segments, and the hard segments are mainly provided by the reaction of isocyanate groups and amine chain extenders containing benzene rings. and heat resistance are limited, so polyurethane adhesives also have some deficiencies during use.
Polyurethane adhesives have low mechanical properties and poor high temperature resistance, which limit its use, and are easily hydrolyzed under high temperature and high humidity to reduce the bond strength. They do not have long-term heat resistance, and light-colored formulations are susceptible to ultraviolet light aging

Method used

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  • A preparation method of a polyurethane/epoxy resin composite material
  • A preparation method of a polyurethane/epoxy resin composite material
  • A preparation method of a polyurethane/epoxy resin composite material

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preparation example Construction

[0028] Implementation of a kind of polyurethane / epoxy resin composite material provided by the present invention, i.e. a kind of preparation method of polyurethane / epoxy resin composite adhesive material, at first is to obtain A Components, and then prepare the binary arylamine-terminated epoxy resin E-44 to obtain the curing agent B component, and finally mix the A and B components in a certain proportion to prepare the polyurethane / epoxy resin composite adhesive agent material. The specific steps are as follows (feeding amount is calculated by mass fraction):

[0029] (1) Synthesis of NCO-terminated MDI-50 type polyurethane prepolymer

[0030] Add 100 parts of polyether polyol N210 into the reactor in parts by mass, and dehydrate for 2.5 hours at 120°C while maintaining a vacuum of 0.08-0.09 MPa; then cool down to 50°C, add 52.2-77.9 parts of diisocyanate, and then heat up to 80 ℃ heat preservation reaction for 2.5 h; control the mass content of free -NCO% to 6.0% ~ 10.0%,...

Embodiment 1

[0064] (1) Synthesis of NCO-terminated MDI-50 type polyurethane prepolymer

[0065] Add 100 parts of polyether polyol N210 into the reactor in parts by mass, dehydrate for 2.5 hours at 120°C while maintaining a vacuum of 0.08-0.09 MPa; then cool down to 50°C, add 52.2 parts of diisocyanate, and then heat up to 80°C Insulation reaction for 2.5 h; when the mass content of free-NCO% is controlled to 6.0%, then degassing under a vacuum of 0.8-0.9 MPa for 0.5 h to obtain -NCO-terminated MDI-50 with a mass content of free-NCO% of 6.0% Polyurethane prepolymer, called A component.

[0066] (2) Synthesis of binary aromatic amine-terminated epoxy resin E-44

[0067] Accurately weigh 272 parts of TX-2 binary aromatic amine in a four-necked bottle, and after heating up to 65±2°C, add 257 parts of E-44 liquid epoxy resin dropwise, keep for 4 to 5 hours to complete the dropping, and then the temperature Rise to 80±2°C, continue to react for 4h to get -NH 2 The blocked curing agent compon...

Embodiment 2

[0071] (1) Synthesis of NCO-terminated MDI-50 type polyurethane prepolymer

[0072] Add 100 parts of polyether polyol N210 into the reactor in parts by mass, dehydrate for 2.5 hours at 120°C while maintaining a vacuum of 0.08-0.09 MPa; then cool down to 50°C, add 77.9 parts of diisocyanate, and then heat up to 80°C Insulation reaction for 2.5 h; when the mass content of free-NCO% was controlled to 10.0%, and then degassed for 0.5 h under a vacuum of 0.8-0.9 MPa, the -NCO-terminated MDI-50 type with a mass content of free-NCO% of 10.0% was obtained Polyurethane prepolymer, called A component.

[0073] (2) Synthesis of binary aromatic amine-terminated epoxy resin E-44

[0074] Accurately weigh 272 parts of binary aromatic amine TX-2 in a four-necked bottle, and after heating up to 65±2°C, add 257 parts of E-44 liquid epoxy resin dropwise, keep the dropwise addition for 4 to 5 hours, and then temperature Rise to 80±2°C, continue to react for 4h to get -NH 2 The blocked curing ...

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Abstract

A preparation method of a polyurethane / epoxy resin composite material comprises a step of adding a polyether polyol into a reactor to be treated, adding a diisocyanate and heating, controlling the mass content of free -NCO, and obtaining an A component after vacuum deaeration; a step of heating a binary aromatic amine, adding dropwise the liquid epoxy resin and heating again, and reacting to obtain a B component; and a step of stirring and mixing uniformly the A component and the B component stoichiometrically, and reacting and curing to obtain the polyurethane / epoxy resin composite material. When being used as an adhesive, the composite material has good bonding strength, high-temperature resistance, low-temperature resistance, impact resistance and flexibility. The composite material has a wide application scope, and can be prepared into a high-hardness polyurethane elastomer composite material to be applied.

Description

technical field [0001] The invention relates to a preparation method of polyurethane / epoxy resin composite material, in particular to a preparation method of epoxy resin modified polyurethane composite adhesive material. technical background [0002] Polyurethane adhesive is an important part of polyurethane resin. It has excellent impact resistance, flexibility and low temperature resistance in application. It is suitable for bonding various substrates and forming a soft-hard transition layer between substrates. , At the same time, it also has good cushioning and shock absorption functions. It is precisely because of these characteristics of polyurethane adhesives that their application fields continue to expand, and they have a large application space in civil engineering, transportation, electronic components, daily necessities, and packaging. adhesive. [0003] The synthetic soft segments of existing polyurethane adhesives are mainly provided by polyether or polyester ...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/58C08G18/48C08G18/10C09J175/08
CPCC08G18/10C08G18/4825C08G18/643C09J175/08C08G18/64
Inventor 赵凌云
Owner 太原英可奥笔墨科技有限公司
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