Environmentally friendly rubber sealing strip quick-drying paint

Abstract

The invention discloses environment-friendly rubber sealing strip quick drying paint which comprises the following components: a conjugated polydialkylenemethylsilane resin, a silane coupling agent and isocyanate. The conjugated polydialkylenemethylsilane resin, the silane coupling agent and the isocyanate are subjected to chain propagation reaction under the actions of ultraviolet light, free radical and oxygen in air, and lots of covalent bonds are formed among the previous components and unsaturated double bonds, sulfur atoms which are not completely vulcanized and active hydrogen atoms on the rubber surface. Moreover, hydrogen bonds are formed between urethane and hydroxyl in coating molecules and hydrogen atoms in the rubber, and adhesive force between the coating and the rubber surface is extremely high due to double effects of the covalent bonds and hydrogen bonds. Because molecular chains in the conjugated polydialkylenemethylsilane resin, the silane coupling agent and the isocyanate grow quickly in air and the conjugated polydialkylenemethylsilane resin, the silane coupling agent and the isocyanate react with moisture in the air, so that a quick drying effect is achieved.

Description

technical field [0001] The invention relates to a coating, in particular to an environment-friendly quick-drying coating for rubber sealing strips. Background technique [0002] There are usually two spraying methods in the industry for the spraying process of rubber sealing strips, one is the traditional offline manual spraying, and the other is the online automatic spraying adopted by more and more manufacturers. There are many offline spraying processes, and the stability of product quality is difficult to guarantee; compared with offline manual spraying, the online automatic spraying method has more uniform film thickness, firmer film formation, better adhesion, more natural and beautiful gloss, and more stable quality . [0003] Because of the low surface energy of automobile rubber sealing strips, the existing process of coating the surface is very complicated. Generally, it needs to be carried out: surface cleaning→plasma treatment→preheating→spraying→high temperatu...

AI Technical Summary

Problems solved by technology

Water-based two-component wear-resistant coating is a new technology developed in recent years. Chinese patent CN101845267A discloses a water-based two-component wear-resistant coating, which has the advantages of environmental protection and good wear resistance, but the construction process is complicated, and the rubber surface requires Plasma treatment, pre-baking, the temperature should reach 80-100 degrees before painting, high temperature baking after painting, the temperature should be 230-300 degrees

Oil-based wear-resistant rubber paint is a solvent-based rubber coating. Its advantage is that it does not require high-temperature baking and has good wear resistance; however, the rubber surface should be treated with plasma before coating, and it should be baked at a low temperature of 60-100 degrees after coating. Dry, because it contains a large amount of benzene harmful solvents, it will cause environmental pollution, it is flammable and explosive when baking, if it is naturally dried, the curing time is very long, the surface is dry for more than 30 minutes, and the cross-linking curing takes longer, which affects production Efficiency, in addition, the adhesion with rubber is not good, after high temperature and low temperature, cold and hot cycle is easy to fall off

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