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Modified epoxy polyurethane sealant and preparation method thereof

A technology of epoxy polyurethane and sealant, which is applied in the field of sealant, and can solve problems such as rapid failure, low temperature resistance, and poor insulation effect

Inactive Publication Date: 2021-08-20
邹微丽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing polyurethane sealant still has problems such as high temperature resistance, rapid failure at high temperature, and poor insulation effect.

Method used

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  • Modified epoxy polyurethane sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A modified epoxy polyurethane sealant, comprising the following raw materials in parts by mass: 10 parts of bisphenol A epoxy resin, 10 parts of vinyl ester resin, 0.1 part of silicon dioxide, 0.1 part of aluminum oxide, and 0.1 part of graphene oxide 0.01 part of octadecylamine, 5 parts of silane coupling agent, 10 parts of propylene oxide, 30 parts of dicyclohexylmethane diisocyanate, 30 parts of polyether triol, 1 part of dibutyltin dilaurate, polynitrogen 1 part of propidine crosslinking agent, 1 part of diethyltoluenediamine, 2 parts of curing agent, 20 parts of solvent;

[0031] The epoxy equivalent of the bisphenol A type epoxy resin is 180g / mol; the vinyl ester resin is vinyl ester resin 411; the curing agent is polyetheramine and polythiol composite curing agent, polyether The mass ratio of amine and polythiol is polyetheramine:polythiol=9:1; the solvent is acetone;

[0032] The preparation method of described modified epoxy polyurethane sealant comprises the ...

Embodiment 2

[0041] A modified epoxy polyurethane sealant, comprising the following raw materials in parts by mass: 20 parts of bisphenol A epoxy resin, 20 parts of vinyl ester resin, 0.5 part of silicon dioxide, 0.5 part of aluminum trioxide, 0.5 part of graphene oxide 0.2 parts of octadecylamine, 10 parts of silane coupling agent, 30 parts of propylene oxide, 50 parts of dicyclohexylmethane diisocyanate, 60 parts of polyether triol, 3 parts of dibutyltin dilaurate, polynitrogen 5 parts of propidine crosslinking agent, 5 parts of diethyltoluenediamine, 8 parts of curing agent, 30 parts of solvent;

[0042] The epoxy equivalent of the bisphenol A type epoxy resin is 200g / mol; the vinyl ester resin is vinyl ester resin 806; the curing agent is polyetheramine and polythiol composite curing agent, polyether The mass ratio of amine and polythiol is polyetheramine:polythiol=9:1; the solvent is dehydrated alcohol;

[0043] The preparation method of described modified epoxy polyurethane sealant ...

Embodiment 3

[0052] A modified epoxy polyurethane sealant, comprising the following raw materials in parts by mass: 15 parts of bisphenol A epoxy resin, 15 parts of vinyl ester resin, 0.3 part of silicon dioxide, 0.3 part of aluminum oxide, and 0.3 part of graphene oxide Parts, 0.1 parts of octadecylamine, 7 parts of silane coupling agent, 20 parts of propylene oxide, 40 parts of dicyclohexylmethane diisocyanate, 45 parts of polyether triol, 2 parts of dibutyltin dilaurate, polynitrogen 3 parts of propidine crosslinking agent, 3 parts of diethyltoluenediamine, 5 parts of curing agent, 25 parts of solvent;

[0053] The epoxy equivalent of the bisphenol A epoxy resin is 190g / mol; the vinyl ester resin is vinyl ester resin 430; the curing agent is polyetheramine and polythiol compound curing agent, polyether The mass ratio of amine and polythiol is polyetheramine:polythiol=9:1; the solvent is toluene;

[0054] The preparation method of described modified epoxy polyurethane sealant comprises ...

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Abstract

The invention relates to the technical field of sealants, in particular to a modified epoxy polyurethane sealant and a preparation method thereof. The modified epoxy polyurethane sealant comprisses the following raw materials in parts by weight: 10 to 20 parts of bisphenol A epoxy resin, 10 to 20 parts of vinyl ester resin, 0.1 to 0.5 part of silicon dioxide, 0.1 to 0.5 part of aluminum trioxide, 0.1 to 0.5 part of graphene oxide, 0.01 to 0.2 part of octadecylamine, 5 to 10 parts of a silane coupling agent, 10 to 30 parts of propylene oxide, 30 to 50 parts of dicyclohexylmethane diisocyanate, 30 to 60 parts of polyether triol, 1 to 3 parts of dibutyltin dilaurate, 1 to 5 parts of a polyaziridine cross-linking agent,1 to 5 parts of diethyl toluenediamine, 2 to 8 parts of a curing agent and 20 to 30 parts of a solvent. The prepared modified epoxy polyurethane sealant has the advantages of excellent mechanical property, good adhesion property, good weather resistance, high temperature resistance, good electrical insulating property and the like.

Description

technical field [0001] The invention relates to the technical field of sealant, in particular to a modified epoxy polyurethane sealant and a preparation method thereof. Background technique [0002] Sealing involves all walks of life, among which sealant is a convenient and easy-to-carry sealing material, which can adhere to the same or different materials, and has good adhesion performance and good sealing effect. It has become one of the most efficient sealing methods and is widely used. Used in home improvement, construction, transportation, aerospace and other fields. However, when the sealant is exposed to high temperature, high pressure, low temperature, partial acidity, partial alkalinity, blisters, long-term sunlight exposure, wind blowing, etc., or aging after long-term use, it will cause running, popping, dripping, and leakage. invalidated. [0003] Polyurethane is one of the six major synthetic materials in the world. Polyurethane sealant is one of the three maj...

Claims

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Application Information

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IPC IPC(8): C09J175/04C09J11/04C09J11/06C08G18/75C08G18/66C08G18/67C08G18/48C08G18/58C08G18/32
CPCC09J175/04C09J11/04C09J11/06C08G18/758C08G18/6685C08G18/4829C08G18/324C08G18/3246C08G18/58C08G18/4045C08G18/6705C08K2003/2227C08K2201/011C08L2201/02C08L2201/08C08L2203/20C08K13/06C08K9/04C08K3/36C08K3/22C08K3/042C08K5/54
Inventor 邹微丽廖昌成
Owner 邹微丽
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