Automobile interior decorative plate with self-repairing function, and preparation method thereof

A self-repairing technology for interior decorative panels, applied to chemical instruments and methods, household appliances, flat products, etc., can solve problems such as scratches and damages, improve hardness and wear resistance, excellent weather resistance, improve hardness and resistance scratchy effect

Inactive Publication Date: 2020-09-11
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The automobile interior decoration board not only realizes its own certain scratch resistance, but also realizes the self-repair of the damaged coating at normal temperature, and the same part can be repaired multiple times, which effectively solves the problem of the automobile interior decoration board being scratched. The problem of scratching and damage during use; in addition, by integrally forming the self-healing water-based polyurethane layer with the plastic base layer, the problem of bonding between the self-healing layer and the rigid polyurethane material of the automotive interior trim panel is also solved, improving the quality of the car. Hardness and wear resistance of automotive interior trim panels

Method used

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  • Automobile interior decorative plate with self-repairing function, and preparation method thereof
  • Automobile interior decorative plate with self-repairing function, and preparation method thereof

Examples

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Effect test

Embodiment 1

[0050] The present embodiment provides a kind of preparation method of the automotive interior trim panel with self-repairing function, it comprises the following steps:

[0051] (1) Preparation of self-healing water-based polyurethane emulsion: Take 70 parts of 1,6-hexanediol polycarbonate and 1 part of internal crosslinking agent trimethylolpropane, vacuum dehydrate at 120°C for 3 hours, wait for cooling After reaching 55°C, add 25 parts of hexamethylene diisocyanate and 0.3 parts of stannous octoate, mix well, then raise the temperature to 90°C and stir for 2 hours, then add 5 parts of alcohol chain extender 1,3-butanediol into the reactor React in medium for 3 hours to obtain prepolymer A; then lower the temperature of the above prepolymer A to 55°C, add 2 parts of disulfide bond-containing chain extender 2,2'-dithiodiethanol, react for 2 hours, and then cool to Add 2 parts of triethylamine at 40°C, neutralize and react for 10 minutes, add deionized water to vigorously sti...

Embodiment 2

[0056] The present embodiment provides a kind of preparation method of the automotive interior trim panel with self-repairing function, it comprises the following steps:

[0057] (1) Preparation of self-healing water-based polyurethane emulsion: Take 70 parts of polypropylene glycol and 1 part of internal crosslinking agent trimethylolpropane, vacuum dehydrate at 120°C for 3 hours, and add 30 parts of 4 after cooling down to 55°C , 4'-dicyclohexylmethane diisocyanate and 0.2 parts of dibutyltin dilaurate, mix evenly, heat up to 90°C and stir for 2 hours, add 5 parts of alcohol chain extender 1,4-butanediol into the reactor React for 3 hours to obtain prepolymer A; then lower the temperature of the above prepolymer A to 55°C, add 2 parts of disulfide bond-containing chain extender 4,4'-diaminodiphenyl disulfide, react for 2 hours, and then Cool to 40°C and add 2 parts of triethylamine, neutralize and react for 10 minutes, add deionized water to vigorously stir and emulsify and ...

Embodiment 3

[0062] The present embodiment provides a kind of preparation method of the automotive interior trim panel with self-repairing function, it comprises the following steps:

[0063] (1) Preparation of self-healing water-based polyurethane emulsion: take 55 parts of polypropylene glycol and 0.2 part of internal crosslinking agent triethanolamine, dehydrate in vacuum for 4 hours at 115°C, add 30 parts of hexamethylene after cooling down to 55°C Diisocyanate and 0.01 part of dioctyltin dilaurate, mix evenly, heat up to 90°C and stir for 2 hours, add 5 parts of alcohol chain extender 1,3-butanediol into the reactor and react for 2.5 hours to obtain a prepolymer A; then lower the temperature of the above prepolymer A to 55°C, add 1 part of chain extender 2,2'-dithiodiethanol containing disulfide bonds, react for 1.5 hours, then cool to 35°C and add 3 parts of triethylamine, Neutralize and react for 10 minutes, add deionized water to vigorously stir and emulsify and disperse, and the s...

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Abstract

The invention relates to an automobile interior decorative plate with a self-repairing function, and a preparation method thereof. The automobile interior decorative plate comprises a plastic base layer and a surface layer which are integrally formed, and the surface layer is a self-repairing waterborne polyurethane layer covering the base layer. A waterborne polyurethane emulsion with a self-repairing function is synthesized through a prepolymer method, auxiliaries are added into the waterborne polyurethane emulsion to prepare surface layer slurry, and then the automobile interior decorativeplate with the self-repairing function is prepared through a double-material injection molding process. The automobile interior decorative plate provided by the invention has certain scratch resistance, self-repairing of a damaged coating can be realized at normal temperature, and repeated repairing of the same part can be realized, so that the problem of scratch damage of the automobile interiordecorative plate in the use process is effectively solved; different glossiness values can be provided, and the weather resistance is excellent; and due to the fact that a spraying-free technology isadopted, VOC and air quality in the automobile are effectively improved, and the application value is high.

Description

technical field [0001] The invention relates to the field of automobile interior decoration manufacturing, in particular to an automobile interior decoration board and a preparation method thereof, in particular to an automobile interior decoration board with a self-repairing function and a preparation method thereof. Background technique [0002] With economic development and social progress, more and more private cars have entered thousands of households. As a part within the reach of consumers, many car interior trim panels will inevitably be scratched and damaged during use, which will not only affect the aesthetics of the car interior trim panels, greatly reduce the high-end feeling of the interior, but also affect the The use of the car is quite disadvantageous. Therefore, for how to repair the scratches and damages of the interior trim panels of automobiles, it has become an urgent problem to be solved at present. [0003] At present, the repair methods for scratche...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/40B32B27/08B32B27/20B32B27/36B32B27/30B32B27/32B32B33/00B29D7/01C08L75/08C08G18/75C08G18/66C08G18/48C08G18/32C08G18/12B60R13/02
CPCB29D7/01B32B27/08B32B27/20B32B27/302B32B27/304B32B27/32B32B27/365B32B27/40B32B33/00B32B2250/02B32B2250/24B32B2270/00B32B2307/536B32B2307/554B32B2307/584B32B2307/762B32B2605/08B60R13/02C08G18/12C08G18/3206C08G18/4825C08G18/6677C08G18/755C08L75/08C08G18/3868
Inventor 滕腾杨天博于洪阳任晓珊刘思旸赵君陆
Owner CHINA FIRST AUTOMOBILE
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