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Coating process of automotive upholstery

A technology of automotive interior parts and coating technology, applied in the field of auto parts, can solve problems such as stability, self-thickening, insufficient solid content gloss retention, poor film forming and flexibility, poor water and solvent resistance, etc. , to achieve the effect of coating consumption, good hardness, excellent wear resistance and corrosion resistance

Active Publication Date: 2018-02-16
NINGBO SHUAITELONG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Acrylic resin has the advantages of fast drying, good transparency, good gloss and color retention, and good adhesion, gloss, hardness and weather resistance. Its disadvantages are high minimum film-forming temperature, low film-forming property and flexibility. Poor, poor water and solvent resistance, hot sticky and cold brittle
The molecular structure of polyurethane has a segment structure composed of hard segments and soft segments, which determines its unique properties of being hard and flexible. Its two-phase structure makes water-based polyurethane have excellent low-temperature film-forming properties, leveling properties and flexibility. , good heat back tackiness, but there are deficiencies in stability, self-thickening, solid content, gloss retention, etc.

Method used

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  • Coating process of automotive upholstery

Examples

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Comparison scheme
Effect test

Embodiment 1

[0035] The coating material of the present embodiment is made up of the component of following parts by weight:

[0036] 16 parts of hydroxyacrylic acid emulsion; 55 parts of polystyrene grafted polyurethane; 12 parts of hydroxymethyl cellulose; 10 parts of cyclodextrin-coated calcium carbonate whiskers, 5 parts of diethylene glycol methyl ether; 12 parts of deionized water. The polystyrene segment accounts for 8% of the total amount of polystyrene-grafted polyurethane. The preparation method of cyclodextrin-coated calcium carbonate whiskers is as follows: disperse cyclodextrin in ethanol, stir at 5000r / min for 20min, then raise the temperature to 80°C, add filler, keep stirring at 500r / min, keep warm for 4h, filter and wash and drying to obtain cyclodextrin-coated calcium carbonate whiskers, wherein the mass ratio of cyclodextrin to calcium carbonate whiskers is 15:1.

[0037] Send the automotive interior parts to be processed into the spray booth. The temperature of the spr...

Embodiment 2

[0039] The coating material of the present embodiment is made up of the component of following parts by weight:

[0040] 16 parts of hydroxyacrylic acid emulsion; 55 parts of polystyrene grafted polyurethane; 12 parts of hydroxymethyl cellulose; 10 parts of cyclodextrin-coated calcium carbonate whiskers, 5 parts of diethylene glycol methyl ether; 12 parts of deionized water. The polystyrene segment accounts for 8% of the total amount of polystyrene-grafted polyurethane. The preparation method of cyclodextrin-coated calcium carbonate whiskers is as follows: disperse cyclodextrin in ethanol, stir at 5000r / min for 20min, then heat up to 80°C, add filler, keep stirring at 500r / min, keep warm for 4h, filter and wash and drying to obtain cyclodextrin-coated calcium carbonate whiskers, wherein the mass ratio of cyclodextrin to calcium carbonate whiskers is 15:1.

[0041] Send the automotive interior parts to be processed into the spray booth. The temperature of the spray booth is 25...

Embodiment 3

[0043] The coating material of the present embodiment is made up of the component of following parts by weight:

[0044]16 parts of hydroxyacrylic acid emulsion; 55 parts of polystyrene grafted polyurethane; 12 parts of hydroxymethyl cellulose; 10 parts of cyclodextrin-coated calcium carbonate whiskers, 5 parts of diethylene glycol methyl ether; 12 parts of deionized water. The polystyrene segment accounts for 8% of the total amount of polystyrene-grafted polyurethane. The preparation method of cyclodextrin-coated calcium carbonate whiskers is as follows: disperse cyclodextrin in ethanol, stir at 5000r / min for 20min, then heat up to 80°C, add filler, keep stirring at 500r / min, keep warm for 4h, filter and wash and drying to obtain cyclodextrin-coated calcium carbonate whiskers, wherein the mass ratio of cyclodextrin to calcium carbonate whiskers is 15:1.

[0045] Send the automotive interior parts to be processed into the spray booth. The temperature of the spray booth is 25°...

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Abstract

The invention belongs to the field of automobile parts and relates to a coating process of an automotive upholstery. The coating process comprises the steps that S1, pretreatment is conducted, specifically, carbon dioxide snowflake cleaning is conducted, and dust and electricity removing treatment is conducted; S2, primer is sprayed, specifically, the waterborne polyurethane epoxy resin primer issprayed; S3, finishing coat is sprayed, specifically, the coat is sprayed, and levelling is conducted for 10-20 min after spraying; and S4, solidifying and cooling are conducted, specifically, solidifying is conducted at 70-90 DEG C, and cooling is conducted. The coating process further comprises the step that ultrasonic treatment is conducted after the S3, specifically, the automotive upholsterycoated with the finishing coat is coated with polyethylene, and ultrasonic treatment is conducted for 80-120 s at the pressure of 10-20 MPa. The finishing coat comprises 12-20 parts of hydroxy acrylicemulsion, 53-63 parts of polystyrene grafted polyurethane, 9-15 parts of carboxy methyl cellulose, 8-14 parts of cyclodextrin wrapped filler, 3-8 parts of a coalescing agent and 10-15 parts of deionized water.

Description

technical field [0001] The invention belongs to the field of auto parts, and relates to a coating process for auto interior parts. Background technique [0002] In recent years, plastic products have been widely used in industrial products, especially in the rapid expansion of applications in the fields of automobiles and electric vehicles. More and more automotive interior parts have begun to be plasticized, and the ensuing demand for these plastic parts The requirements for decoration and durability are getting higher and higher, and the automotive interior parts after spraying coatings are required to have good toughness, hardness, wear resistance and corrosion resistance. [0003] At present, there are two types of paints: solvent-based and water-based paints. Although the price of solvent-based paints is only half of that of water-based paints, the content of benzene series in solvent-based paints is much higher than that of water-based paints, which not only pollutes t...

Claims

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Application Information

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IPC IPC(8): B05D1/38B05D3/00B05D3/02B05D7/00C09D187/00C09D7/65C09D7/62
CPCB05D1/38B05D3/002B05D3/0254B05D7/542B05D7/582B05D2320/00B05D2502/00B05D2503/00B05D2507/01C09D187/005C08L1/284C08L33/04C08K9/10C08K7/06C08K7/08B05D2420/01B05D2420/02B05D2420/03
Inventor 吴志光吴锡辉励春林江华侨
Owner NINGBO SHUAITELONG GRP
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