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A kind of low-odor spray-molded automobile instrument panel material and preparation method thereof

A low-odor technology for automotive dashboards, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of high viscosity of polyester polyols, high elongation at break, unfavorable processing and production of dashboards, etc., and achieve a good surface Performance, the effect of excellent wear resistance

Active Publication Date: 2021-02-05
BOMEX CHEM SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Patent CN 105820303 A uses highly branched and high hydroxyl value polyester polyols to prepare polyurethane instrument panels, and then highly branched and high hydroxyl value polyester polyols have high viscosity, which is not conducive to the processing and production of instrument panels, and polyester polyurethane The hydrolysis resistance of the material is poor; the patent CN 101591420 B has prepared the instrument panel material by using polyether polyol, but, during the spraying process, the instrument panel material has different directions and angles, which is prone to sagging, and over The use of multiple catalysts can affect the performance of the material
Moreover, the elongation at break of the material in this patent is too high, which is not conducive to the effective blasting of the airbag when the car encounters an accident, and cannot effectively protect the occupants.

Method used

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  • A kind of low-odor spray-molded automobile instrument panel material and preparation method thereof
  • A kind of low-odor spray-molded automobile instrument panel material and preparation method thereof
  • A kind of low-odor spray-molded automobile instrument panel material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The parts mentioned in the following examples all refer to parts by weight.

[0041] The following technical indicators are evaluated for the sprayed polyurethane instrument panel obtained in each of the following embodiments. Surface properties: abrasion resistance, solvent resistance (petroleum ether, alcohol, ammonia detergent, surfactant),

[0042] High temperature color fastness;

[0043] Mechanical properties: tensile strength, elongation at break;

[0044] Emissions: odor, VOC, condensation, formaldehyde, flame retardant properties.

[0045] Aging performance: humidity aging (70°C, 95% humidity, 500h), heat aging (120°C, 500h), environmental cycle ((+80 / -40)°C);

[0046] The above tests are carried out in accordance with the German Volkswagen Standard TL52296 and its referenced standards.

[0047] The following components are used in the examples of this application:

[0048] Water-based two-component in-mold paint

[0049] Wherein, preferred formula comprise...

Embodiment 3

[0078] The formula of table 1 embodiment 1-3

[0079]

[0080] Samples were prepared according to the formulations of Examples 1-3 in Table 1. For each sample, each test was repeated three times, and the average value was obtained.

[0081] The abrasion resistance performance of table 2 embodiment 1-3 abrasion resistance performance

[0082] Example Example 1 Example 2 Example 3 Dry grinding 100 times Grade 4‐5 Grade 4‐5 Grade 4‐5 petroleum ether Grade 4‐5 Grade 4‐5 Grade 4‐5 alcohol level 4 level 4 level 4 Ammonia Glass Cleaner Grade 4‐5 Grade 4‐5 Grade 4‐5 Surfactant Grade 4‐5 Grade 4‐5 Grade 4‐5

[0083] Table 3 embodiment 1-3 solvent resistance performance

[0084]

[0085] The emitting performance of table 4 embodiment 1-3

[0086] Example Example 1 Example 2 Example 3 Condensed mg 0.49 0.50 0.48 Formaldehydemg / kg 0.74 0.78 0.72 Total carbon ugC / g 8.50 8...

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Abstract

The invention discloses a low-odor spray-molded automobile dashboard material and a preparation method thereof. The spray-molded automobile dashboard material comprises two layers, the surface layer is a water-based two-component in-mold paint layer, and the film inner paint is dispersed by water-based polyurethane The body reacts with the aliphatic curing agent to form a film with a certain thickness, the thickness is 10-100μm; the inner layer is a polyurethane layer, and the polyurethane layer contains amino polyether, polyether polyol, chain extender, cross-linking agent, catalyst, etc. and isocyanate compound Formed by polymerization reaction, thickness 0.5‑5 mm. When the material of the present invention is used to prepare an instrument panel, especially when the parts of the instrument panel are in different directions, the material can be solidified rapidly and the sagging phenomenon is avoided. In addition, the instrument panel made of the above materials has reasonable mechanical properties, excellent surface properties and aging resistance, which improves the explosion problem of the safety airbag of the car in an accident and improves the safety performance of the car. The invention discloses a preparation method of the instrument panel material.

Description

technical field [0001] The invention relates to a plastic spraying material and a preparation method thereof, in particular to a low-odor spray molding automobile instrument panel material and a preparation method thereof. [0002] The invention relates to a plastic-sprayed automotive instrument panel material, the surface layer of which is a water-based two-component in-mold paint. While further improving the odor and VOC of the automotive interior material, the instrument panel is endowed with excellent surface properties, including wear resistance, and Solvent and weather resistance. Its inner layer is a polyurethane layer, which is formed by reacting a composition with polyether polyol as the main component and an aromatic isocyanate compound. The composition with polyether polyol as the main component contains amino polyether with extremely high activity , to improve the sag problem of sprayed polyurethane in the spraying process, or the problem of material performance d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/046C08G18/66C08G18/48C08G18/50C08G18/32C09D175/04
CPCC08G18/3206C08G18/4804C08G18/4825C08G18/4829C08G18/5021C08G18/6674C08J2375/08C08J2475/04C09D175/04C08J7/0427
Inventor 袁黎峰周红欣吕一军周震杰冯丽李晶杨君胜
Owner BOMEX CHEM SHANGHAI
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