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Polyurethane structural adhesive used for bonding automobile spoiler and preparation method and application of polyurethane structural adhesive

A polyurethane and structural adhesive technology, applied in the field of structural adhesives, can solve the problems of large shrinkage deformation, poor toughness, cracking, etc., and achieve the effects of moderate modulus and hardness, excellent weather resistance, and high shear strength

Active Publication Date: 2018-07-13
CHINA BUILDING MATERIAL TEST & CERTIFICATION GRP SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this patent achieves good shear strength to a certain extent and has good bonding performance in a stable room temperature environment, its toughness is poor, especially in high-temperature and low-temperature environments with large vibrations, and the shrinkage deformation is large , is prone to cracking and degumming, and is difficult to meet the actual requirements. Therefore, those skilled in the art urgently need to find a solution that can solve the above problems

Method used

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  • Polyurethane structural adhesive used for bonding automobile spoiler and preparation method and application of polyurethane structural adhesive

Examples

Experimental program
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Embodiment 1

[0028] This embodiment provides a kind of polyurethane structural adhesive for bonding automobile spoiler, which comprises first component and second component:

[0029] Wherein the first component includes: 30 parts of polyoxypropylene glycol (number average molecular weight is 2000), 3 parts of polyoxypropylene trihydric alcohol (number average molecular weight is 450), polyoxypropylene glycol (number average molecular weight is 450) 200) 2 parts, 10 parts of castor oil (hydroxyl value 161mgKOH / g), 23.99 parts of nano calcium carbonate, 25 parts of 800 mesh stearic acid modified heavy calcium carbonate, 2 parts of fumed silica, 2 parts of anhydrous calcium oxide 1 part, 1 part of carbon black, 1 part of N-β-aminoethyl-γ-aminopropyltrimethoxysilane, 0.01 part of dibutyltin dilaurate.

[0030] The above-mentioned components are fully and evenly dispersed planetary, and the viscosity is 30 Pa·s, that is, the first component is obtained.

[0031] Wherein the second component in...

Embodiment 2

[0035] This embodiment provides a kind of polyurethane structural adhesive for bonding automobile spoiler, which comprises first component and second component:

[0036] Wherein the first component includes: 28 parts of polyoxypropylene glycol (number average molecular weight is 4000), 3 parts of polyoxypropylene trihydric alcohol (number average molecular weight is 500), polyoxypropylene glycol (number average molecular weight is 500) 400) 2 parts, 8 parts of castor oil (hydroxyl value 161mgKOH / g), 25.98 parts of nano calcium carbonate, 27 parts of 800 mesh stearic acid modified heavy calcium carbonate, 2 parts of fumed silica, 2 parts of anhydrous calcium oxide 1 part, 1 part of carbon black, 1 part of N-β-aminoethyl-γ-aminopropyltrimethoxysilane, 0.02 part of stannous octoate.

[0037] The above-mentioned components are fully and evenly dispersed planetary, and the viscosity is 26Pa·s, that is, the first component is obtained.

[0038] Wherein the second component includes...

Embodiment 3

[0042] This embodiment provides a kind of polyurethane structural adhesive for bonding automobile spoiler, which comprises first component and second component:

[0043] Wherein the first component comprises: 32 parts of polyoxypropylene diols (number average molecular weight is 3000), 3 parts of polyoxypropylene triols (number average molecular weight is 500), polyoxypropylene diols (number average molecular weight is 500) 300) 3 parts, castor oil (hydroxyl value 161mgKOH / g) 12 parts, nano calcium carbonate 25.99 parts, 800 mesh stearic acid modified heavy calcium carbonate 18 parts, fumed silica 2 parts, anhydrous calcium oxide 2 1 part, 1 part of carbon black, 1 part of N-β-aminoethyl-γ-aminopropyltrimethoxysilane, 0.01 part of dibutyltin dilaurate.

[0044] The above-mentioned components are fully and evenly dispersed planetary, and the viscosity is 30 Pa.s, that is, the first component is obtained.

[0045] Wherein the second component includes: polymethylene polyphenyl ...

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Abstract

The invention discloses a polyurethane structural adhesive used for bonding an automobile spoiler and a preparation method and application of the polyurethane structural adhesive used for bonding theautomobile spoiler. The polyurethane structural adhesive comprises raw materials of a first component and a second component in a feed mass ratio of 1: (0.75 to 1.5), wherein the second component comprises polyisocyanate; the first component comprises polyether polyol having the number average molecular weight from 2000 to 4000 and being more than difunctionality, polyether polyol having the number average molecular weight from 300 to 500 and being more than tri-functionality, polyether polyol having the number average molecular weight from 90 to 400 and castor oil in a feed mass ratio of (7 to 33): (0.6 to 5): 1 to (2 to 13); the preparation of the polyurethane structural adhesive used for bonding the automobile spoiler comprises the following steps: respectively mixing various componentsin the first component and the second component through a physical mixing method and then blending to obtain the polyurethane structural adhesive; the application of the polyurethane structural adhesive used for bonding the automobile spoiler is that the first component and the second component of the polyurethane structural adhesive are separately sprayed on the bonding part of the spoiler on anautomobile, and the automobile spoiler is bonded to realize bonding; and by adopting the polyurethane structural adhesive used for bonding the automobile spoiler, all performances in various aspectsat room temperature and high and low temperature are excellent.

Description

technical field [0001] The invention belongs to the technical field of structural adhesives, and in particular relates to a polyurethane structural adhesive for bonding automobile spoilers, a preparation method and application thereof. Background technique [0002] Since the 1990s, my country's reform and opening-up situation has promoted the rapid development of the automobile industry, especially all kinds of passenger cars represented by cars. In terms of application, there is a trend of developing towards high performance, multi-variety, serialization and specialization. Generally, the spoiler material produced by automobile companies is polypropylene, which has high impact resistance, strong mechanical properties, and resistance to various organic solvents and acid and alkali corrosion. In the automatic assembly process of automobiles, adhesives are usually used Bond it to the car, but the car will generate large vibrations during driving, which will cause the car spoil...

Claims

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Application Information

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IPC IPC(8): C09J175/08C09J11/04C09J11/06C08G18/67C08G18/48
CPCC08G18/36C08G18/4812C08K2003/2206C08K2003/265C08K2201/011C08K2201/014C09J11/04C09J11/06C09J175/08C08K13/06C08K3/26C08K3/36C08K3/22C08K3/04C08K5/544
Inventor 林良陈建华葛晴耀余奕帆邓海燕
Owner CHINA BUILDING MATERIAL TEST & CERTIFICATION GRP SUZHOU