Ultraviolet-resistant and hydrolysis-resistant silicon rubber leather and coating process thereof

Abstract

The invention discloses ultraviolet-resistant and hydrolysis-resistant silicon rubber leather which comprises constitution raw materials in parts by mass: 100-200 parts of a vinyl silicon rubber-basedadhesive, 20-30 parts of vinyl silicon oil, 10-20 parts of dimethyl silion oil, 10-30 parts of hydrogen-containing silicon oil, 0.1-0.5 part of a thickening agent, 0.1-0.3 part of a platinum catalyst, 5-20 parts of a paste pigment and 0.01-0.05 part of an inhibitor. The leather is simple in process, high in production efficiency and low in production cost, the silicon rubber leather has both ultraviolet rays and hydrolysis properties, yellowing and color fading caused by ultraviolet rays can be avoided in long-term use, and in addition, good hydrolysis resistance can be achieved in damp or water.

Description

technical field [0001] The invention relates to the technical field of organosilicon and leather manufacturing, in particular to a UV-resistant and hydrolysis-resistant silicone rubber leather and a coating process for the UV-resistant and hydrolysis-resistant silicone rubber leather. Background technique [0002] Traditional synthetic leather is mainly made of PU synthetic leather, which is made of isocyanate, macromolecular polyol and small molecular polyol chain extender as the main raw materials. [0003] Isocyanate mainly chooses TDI or MDI as the raw material. Because the benzene ring is directly connected to the isocyanate group, the large PI bond on the benzene ring forms a conjugation with the adjacent -NCO. Under the action, it will cause the urethane bond to decompose and generate aromatic amine. After the benzene nucleus on the aromatic amine is oxidized and rearranged, it will generate chromophoric groups such as quinone structure, so that the produced PU leathe...

AI Technical Summary

Problems solved by technology

[0003] Isocyanate mainly chooses TDI or MDI as the raw material. Because the benzene ring is directly connected to the isocyanate group, the large PI bond on the benzene ring forms a conjugation with the adjacent -NCO. Under the action, it will cause the urethane bond to decompose and generate aromatic amine. After the benzene nucleus on the aromatic amine is oxidized and rearranged, it will generate chromophoric groups such as quinone structure, so that the produced PU leather products are easy to yellow and resistant Poor UV ability

[0004] At the same time, the main chain formed by the combination of isocyanate and hydroxyl in PU synthetic leather has strong polarity and is easily hydrolyzed in moisture or water, making PU synthetic leather poor in hydrolysis resistance.