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Two-component polyurethane sealant and preparation method thereof

A two-component polyurethane and sealant technology, used in polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve problems such as failure of anti-fog coatings, achieve fast curing speed and improve driving safety , the effect of improving adhesion

Active Publication Date: 2017-05-31
CHENGDU GUIBAO NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the rapid development of the automobile industry, most of the mid-to-high-end cars currently use anti-fog lights, and after the silicone sealant is applied to anti-fog lights, its high volatile content will lead to the failure of the anti-fog coating, limiting its application

Method used

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  • Two-component polyurethane sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053]80 parts of polyether polyols with a molecular weight of 5000, 20 parts of polyester polyols with a molecular weight of 2800, 150 parts of light calcium, 50 parts of heavy calcium, 50 parts of diisobutyl phthalate, 0.5 parts of 3-(2 , 3-glycidyloxy)propyltrimethoxysilane, 0.5 parts of ureapropyltrimethoxysilane, 3 parts of hindered phenol antioxidants were added to a vacuum kneader and mixed uniformly at 80°C; then at a temperature of 120°C, Under the condition of vacuum degree of 0.09MPa, dehydration and blending were carried out for 100 minutes to obtain component A of the two-component polyurethane sealant.

[0054] 60 parts of toluene diisocyanate, 20 parts of 1,6-hexamethylene diisocyanate, 20 parts of dimethylene phenyl diisocyanate, 120 parts of polyether polyol with molecular weight of 2000, 80 parts of polyether polyol with molecular weight of 5000, Add 50 parts of alkane oil into the mixer and stir for 120 minutes under nitrogen protection; then add 20 parts of...

Embodiment 2

[0057] 100 parts of polyester polyol with a molecular weight of 3000, 20 parts of light calcium, 60 parts of heavy calcium, 20 parts of diisooctyl phthalate, 1 part of aminoethylaminopropyltrimethoxysilane, 2 parts of hindered phenol Add antioxidants into a vacuum kneader and mix uniformly at 80°C; then dehydrate and blend for 60 minutes at a temperature of 100°C and a vacuum of 0.06MPa to obtain component A of the two-component polyurethane sealant.

[0058] 50 parts of benzhydryl-4,4'-diisocyanate, 50 parts of 1,6-hexamethylene diisocyanate, 200 parts of polyether polyol with a molecular weight of 2000, 100 parts of polyester polyol with a molecular weight of 2800, 40 parts Aromatic hydrocarbon oil was added into the mixer and stirred for 200 minutes under nitrogen protection; then 10 parts of fumed silica and 0.5 parts of dibutyltin dimaleate were added, and stirred for 7 minutes under a vacuum of 0.09 MPa to obtain bis Component polyurethane sealant B component.

[0059] ...

Embodiment 3

[0061] 60 parts of polyether polyol with a molecular weight of 3000, 40 parts of polyether polyol with a molecular weight of 5000, 300 parts of light calcium, 200 parts of heavy calcium, 50 parts of alkane oil, 30 parts of diisodecyl phthalate, 0.5 Add 1 part of aminoethylaminopropyltriethoxysilane, 3 parts of hindered phenolic antioxidant, 2 parts of aromatic secondary amine antioxidant into a vacuum kneader and mix uniformly at 80°C; Under the condition of 0.09MPa, dehydration and blending for 200 minutes to obtain component A of two-component polyurethane sealant.

[0062] Add 80 parts of toluene diisocyanate, 20 parts of isophorone diisocyanate, 50 parts of polyether polyol with a molecular weight of 3000, and 50 parts of alkane oil into the mixer, and stir for 60 minutes under nitrogen protection; then add 5 parts of gas phase Silicon dioxide, 1 part of dibutyltin dilaurate, and 0.5 part of stannous octoate were stirred for 5 minutes under a vacuum degree of 0.08 MPa to o...

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Abstract

The invention discloses a two-component polyurethane sealant. The two-component polyurethane sealant is prepared from, by mass, 4-10 parts of a component A and 1 part of a component B, wherein the component A is prepared from, by mass, 100 parts of a polyalcohol polymer, 20-100 parts of a plasticizer, 50-500 parts of calcium carbonate, 0.5-2 parts of a tackifier and 1-5 parts of an antioxidant, and the component B is prepared from, by mass, 100 parts of polyisocyanate, 50-300 parts of a polyalcohol polymer, 10-50 parts of a plasticizer, 5-20 parts of fumed silica and 0.5-2.0 parts of a catalyst. The polyurethane sealant is high in mechanical strength, good in aging resistance, high in curing speed, low in volatile content, not capable of polluting a car lampshade and suitable for bonding sealing of a car lamp.

Description

technical field [0001] The invention belongs to the field of macromolecular materials, and in particular relates to a preparation method of a two-component polyurethane sealant, which is mainly used for automobile lamps. Background technique [0002] The currently used sealants for automotive lights are mainly divided into two categories: hot melt adhesives and room temperature vulcanizing adhesives. Among them, hot melt adhesives include thermoplastic hot melt adhesives and reactive hot melt adhesives, and room temperature vulcanizing rubbers are further divided into one-component room temperature vulcanizing rubbers and two-component room temperature vulcanizing rubbers. [0003] Hot melt adhesive needs to be heated and melted before use, and then the melt adhesive is coated on the joint, cooled and solidified to obtain a preliminary bonding effect. One of its most prominent advantages is its fast curing speed, which can adapt to rapid continuous industrial production. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J175/06C09J11/04C09J11/06C08K13/02C08K3/26C08K5/12C08K5/5435C08K5/544C08K3/36C08G18/42C08G18/48
CPCC08G18/4018C08G18/42C08G18/4808C08K3/26C08K3/36C08K5/12C08K5/5435C08K5/544C08K13/02C08K2003/265C08L2201/08C08L2203/20C09J11/04C09J11/06C09J175/06C09J175/08
Inventor 毛俊轩熊婷潘林李文辉邹明晶车国勇王有治
Owner CHENGDU GUIBAO NEW MATERIAL