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Primer coating for automobile composite material bonding and preparation method of primer coating

A technology of composite materials and primers, which is applied in the bonding methods, adhesives, coatings and other directions of surface pretreatment, can solve the problems of poor moisture and heat resistance, and achieve excellent moisture and heat aging resistance, stable performance and good adhesion. effect of effect

Active Publication Date: 2019-12-20
HUBEI HUITIAN NEW MATERIALS STOCK CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects existing in the prior art, the present invention provides a primer for bonding automotive composite materials to solve the problem of poor moisture and heat resistance of the existing primer

Method used

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  • Primer coating for automobile composite material bonding and preparation method of primer coating
  • Primer coating for automobile composite material bonding and preparation method of primer coating
  • Primer coating for automobile composite material bonding and preparation method of primer coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Mix MDI and D20 with isocyanate group and hydroxyl molar ratio of 1.2 to 1.6:1 and heat up to 75 to 78°C. After the reaction is complete, an isocyanate group-containing resin with an isocyanate group content of 2wt% to 5wt% is obtained. Discharge spare;

[0036] (2) Mix MDI-50 and Poly bd R45V with a molar ratio of isocyanate group to hydroxyl group of 5 to 7:1 and heat it up to 75 to 78°C, and keep it warm for reaction. After the reaction is complete, the obtained isocyanate group content is 6wt% to 9wt%. The isocyanate group-containing polyolefin is discharged for subsequent use;

[0037](3) 25 parts by weight of A-Link25, 12 parts by weight of isocyanate group-containing resin prepared in step (1), 6 parts by weight of polyolefin containing isocyanate group prepared in step (2), 0.3 parts by weight of Superchlon 822, 8 parts by weight of 2 parts by weight of carbon black, 2 parts by weight of stannous octoate and 46.7 parts by weight of ethyl acetate were mixed ...

Embodiment 2

[0039] (1) Mix HDI biuret with a molar ratio of isocyanate group to amino group of 1.2-1.6:1 and A-1110, heat it up to 75-78°C, and keep it warm for reaction. After the reaction is complete, the obtained isocyanate group content is 6wt%-8wt % isocyanate-containing silane coupling agent;

[0040] (2) Mix MDI and DA2110 with a molar ratio of isocyanate group to hydroxyl group of 1.2 to 1.6:1, heat up to 75 to 78°C, and keep warm for reaction. After the reaction is complete, an isocyanate group containing isocyanate group with an isocyanate group content of 2wt% to 5wt% is obtained The resin is discharged for standby;

[0041] (3) Mix MDI-50 and Krasol LBH-3000 with a molar ratio of isocyanate group to hydroxyl group of 5 to 7:1 and heat it up to 75 to 78°C, and keep it warm for reaction. After the reaction is complete, the obtained isocyanate group content is 6wt% to 9wt. % of polyolefin containing isocyanate group, discharging for subsequent use;

[0042] (4) 20 parts by weig...

Embodiment 3

[0044] (1) Mix MDI and DA2110 with a molar ratio of isocyanate group to hydroxyl group of 1.2 to 1.6:1, heat up to 75 to 78°C, and keep warm for reaction. After the reaction is complete, an isocyanate group containing isocyanate group with an isocyanate group content of 2wt% to 5wt% is obtained The resin is discharged for standby;

[0045] (2) Mix MDI-50 and Poly bd R45V with a molar ratio of isocyanate group and terminal hydroxyl group of 7:1, heat up to 75-78°C, and keep warm for reaction. After the reaction is complete, the isocyanate group content is 6wt%-9wt%. Polyolefin containing isocyanate groups, discharged for later use;

[0046] (3) 20 parts by weight of Link35, 12 parts by weight of isocyanate group-containing resin prepared in step (1), 9 parts by weight of polyolefin containing isocyanate group prepared in step (2), 0.1 part by weight of chlorinated polyolefin, 7 parts by weight of 2 parts by weight of silicon dioxide, 2 parts by weight of stannous octoate and 4...

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Abstract

The invention discloses a primer coating for automobile composite material bonding and a preparation method of the primer coating and belongs to the technical field of polyurethane adhesive bonding primer coatings. The primer coating comprises the following components in parts by weight: 10-30 parts of a silane coupling agent of which the content of an isocyanate group is 6-8wt%, 5-15 parts of a resin of which the content of an isocyanate group is 2-5wt%; 5-10 parts of polyolefin of which the content of an isocyanate group is 6-9wt%, 0-0.5 part of chloridized polyolefin is 20-45wt%, 5-10 partsof a powder aid, 0.5-1 part of a catalyst and 10-50 parts of a solvent. The primer coating is rapid in surface dry time, high in automobile composite material bonding and in addition, good in high temperature and high humidity performance; and when the primer coating is used together with a single-component polyurethane bonding adhesive, the space of a production line site can be saved, adhesiveapplication can be convenient, the production efficiency of automobile manufacturing can be improved, and the problems that a conventional single-component polyurethane adhesive primer coating cannotbe used on an automobile composite material and particularly is poor in high temperature and high humidity resistance can be solved.

Description

technical field [0001] The invention belongs to the technical field of polyurethane adhesive bonding primer, and relates to a primer for bonding automobile composite materials and a preparation method thereof. Background technique [0002] Typically, engineering plastics and composite materials are used for door, roof, seat components, and peripheral structural parts of the car, and these composite materials are fixed to the body by bonding. At present, most processes use two-component structural adhesives after flame treatment or plasma treatment of composite materials, such as Total’s 6023 or Hubei Huitian New Materials Co., Ltd.’s HT8667 for bonding. Two-component bonding The glue sizing equipment is complicated when glue is applied, which is often limited by the manufacturing line space. [0003] The one-component polyurethane structural adhesive has simple sizing equipment and can solve such problems. However, the one-component polyurethane adhesive is directly applie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/06C09D167/00C09D123/00C09D7/61C09D7/63C09D7/65C09J5/02
CPCC08L2205/03C09D167/00C09D167/06C09J5/02C09J2423/106C09J2475/00C09D7/61C09D7/63C09D7/65C08L23/00C08L23/28C08K5/544C08K3/04
Inventor 赵景左唐礼道韩胜利王翠花赵勇刚章锋
Owner HUBEI HUITIAN NEW MATERIALS STOCK CO LTD
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