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Production of polyurethane coating of sealing strip for automobile

A technology for automotive sealing strips and polyurethane, applied in polyurea/polyurethane coatings, chemical instruments and methods, coatings, etc., can solve problems such as poor weather resistance and wear resistance, reduced sliding friction coefficient, and poor surface smoothness , to achieve low water resistance, improve stability, and reduce the difficulty of production and construction

Inactive Publication Date: 2009-08-12
上海九元石油化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the automobile sealing strips are made of rubber, which has poor weather resistance and wear resistance, poor surface smoothness, and not very beautiful appearance. This problem can be solved by electrostatic flocking technology and polyurethane spray coating technology. Among them The sealing strip after spraying polyurethane spray paint not only has good weather resistance and wear resistance, but also has a very beautiful appearance, and at the same time, the coefficient of sliding friction on the surface is greatly reduced, which greatly improves the service performance and life of the sealing strip

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Mixture of liquefied MDI and HDI A 30g Silicone C 5g

[0013] Polybutylene adipate B 100g Polyoxypropylene glycol B 100g

[0014] Toluene F 150g Butanone F 50g

[0015] Cyclohexanone F 80g Ethyl acetate F 25g

[0016] T-12 E 0.05g 1,4-butanediol D 3g

[0017] Color paste BlackB H 45g Dispersant Byk 103 G 4g

[0018] Leveling agent Byk323 J 50g Hand feeling agent 806 K 20g

Embodiment 2

[0020] Mixture of liquefied MDI and HDI A 25g Silicone C 3g

[0021] Polybutylene adipate B 100g Polyoxypropylene glycol B 80g

[0022] Toluene F 100g Butanone F 100g

[0023] Ethyl acetate F 60g Butyl acetate F 40g

[0024] T-12 E 0.06g 1,4-butanediol D 2.5g

[0025] Color paste Black B H 40g Dispersant Byk 103 G 3.5g

[0026] Leveling agent Byk 323 J 60g Hand feeling agent 806 K 22g

Embodiment 3

[0028] Mixture of liquefied MDI and HDI A 32g Silicone C 2g

[0029] Polyethylene adipate B 100g Polyoxypropylene triol B 160g

[0030] Toluene F 150g Butanone F 120g

[0031] Cyclohexanone F 30g T-12 E 0.05g

[0032] 1,4-Butanediol D 3.5g Color paste Black 0 H 35g

[0033] Dispersant Byk 103 G 4g Leveling agent Byk 323 J 50g

[0034] Hand feeling agent 806 K 30g

[0035] The polyurethane spray coating prepared by the above formula has good water resistance - no change after soaking in water for 7 days at room temperature; weather resistance - low temperature bending test - 40℃×4h bending diameter of 25mm, the coating has no cracks; higher adhesion Strength, good heat resistance - 120h storage at 80-100°C, no change in the coating; wear resistance - fluff wear tester, 350g weight, wear times > 15000 times, high and low temperature cycle test 100°C × 4h → 38 ℃, 95% R.H.×4h→—40℃×16h after two cycles, the wear resistance of the middle part is measured >10000 times, 50×10 -8...

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Abstract

Production of polyurethane coating for seal of vehicle is carried out by pre-polymerization reacting, chain-extending reacting, lowering temperature, adding into accessory while diluting by organic solvent, filtering and packing into final product. It has excellent abrasive, ageing and water resistances and low surface friction coefficient and better stability.

Description

[technical field] [0001] The invention relates to the technical field of polyurethane spray coatings, in particular to a preparation method of polyurethane spray coatings for automobile sealing strips. [technical background] [0002] At present, most of the automobile sealing strips are made of rubber, which has poor weather resistance and wear resistance, poor surface smoothness, and not very beautiful appearance. This problem can be solved by electrostatic flocking technology and polyurethane spray coating technology. Among them The sealing strip after spraying polyurethane spray paint not only has good weather resistance and wear resistance, but also has a very beautiful appearance, and at the same time, the coefficient of sliding friction on the surface is greatly reduced, which greatly improves the service performance and life of the sealing strip. [Content of the invention] [0003] The purpose of the present invention is to overcome the deficiencies of the prior art...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D7/06C09K3/10C08G18/48C08G18/42C08G18/24C08G18/79C09D7/47
Inventor 陈县萍程诗强
Owner 上海九元石油化工有限公司