Aqueous bi-component coating of vehicle rubber and plastic sealing strip and preparation method thereof

Abstract

The invention relates to an aqueous bi-component coating of a vehicle rubber and plastic sealing strip and a preparation method thereof. A component A takes aqueous polyurethane as matrix resin, and a component B is a cross-linking agent. The component A contains the following components in percentage by weight: 26-55 percent of aliphatic aqueous polyurethane dispersoid, 0-5 percent of polyamide paraffin slurry, 0-20 percent of aqueous ethylene paraffin liquid, 0-12 percent of aqueous resin containing active functional group, 1-10 percent of functional material, 5-10 percent of slipping agent, 0.1-2 percent of stuffing, 0-3 percent of pigment slurry, 1.5-6 percent of special assistant and 15-45 percent of solvent, and the component B contains the following components in percentage by weight: 70-100 percent of hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate and 0-30 percent of diethylene glycol butylether acetate. The invention has the advantages that after thecross-linking reaction is carried out on the aqueous resin composition and the cross-linking agent, the aqueous bi-component coating has excellent adhesiveness and meets the adhering requirements on treated rubber and plastic surfaces, has superstrong abrasive resistance and moderate flexibility, can enhance the slipping performance and the abrasive resistance with glass, resists high temperature, does not deform or separate out and has permanent slipping effect.

Description

technical field [0001] The water-based two-component vehicle sealing strip paint of the present invention involves two coating materials, which are mainly used for internal and external coating of vehicle sealing strips, including soft PVC, rubber, EPDM and other sealing strips. Background technique [0002] The existing sealing strip mainly uses flocking layer and solvent-based coating as the contact layer of glass sliding, which is seriously polluted and does not meet the air quality requirements in the car, and solvent-based coatings emit VOC organic solvents containing harmful substances such as toluene and xylene. Compounds, the flocking layer is not stain-resistant, difficult to clean, poor wear resistance, easy to fly and pollute the indoor environment, etc., endangering organisms and affecting human health. [0003] There is also a consensus in the automotive coatings industry now that water-based coatings are the main direction of future development. Many mid-to-hig...

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Problems solved by technology

[0002] The existing sealing strip mainly uses flocking layer and solvent-based coating as the contact layer of glass sliding, which is seriously polluted and does not meet the air quality requirements in the car, and solvent-based coatings emit VOC organic solvents containing harmful substances such as toluene and xylene. Compound, flocking layer is not stain-resistant, difficult to clean, poor wear resistance, easy to fly and pollute the indoor environment, etc., harmful to organisms and affect human health

[0003] There is also a consensus in the automotive coatings industry now that water-based coatings are the main direction of future development. Many mid-to-high-end cars are beginning to require the use of water-based coatings. The surface of rubber is basically non-polar, and it is very difficult to coat the surface. It is even more difficult to make water-based coatings. Big, there are no reports of water-based coatings that can meet the standards of GB / T21282-2007 rubber and plastic sealing strips for vehicles in China.

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