Low-foam and anti-ageing wet type polyurethane resin for synthetic leather and preparation method thereof

Abstract

The invention relates to a flow-foam and anti-ageing wet type polyurethane resin for synthetic leather and a preparation method thereof. The polyurethane resin comprises the following components in percentage by weight: 7 to 15% of diphenylmethane-4, 4'-diisocyanate, 8 to 15% of polyadipate type polyester polyol, 2 to 7% of diethylene glycol phthalic anhydride polymer, 0.5 to 3% of castor oil, 1 to 4% of chain extender, 60 to 80% of N, N-dimethylformamide, and 1 to 4% of assistant. The polyurethane resin is less and small in foam structure (low foam), high in elasticity, small in crease after being creased, and high in restorability.

Description

technical field

[0001] The invention relates to the technical field of polyurethane resin preparation, and more specifically relates to a wet-process polyurethane resin for low-foaming and aging-resistant synthetic leather and a preparation method thereof. Background technique

[0002] China's light industry leather processing ranks first in the world. The export volume of leather products ranks first in the light industry for many years in a row. China is increasingly becoming a processing and production base for international brand leather products, and the production technology has fully reached the international advanced level. After decades of rapid development, the current leather products are extremely rich. At the same time, China is also a big country in the production of luggage. There are four major bag manufacturing bases in Huadu of Guangdong, Quanzhou of Fujian, Pinghu of Zhejiang and Baigou of Hebei. With the continuous improvement of people's living and con...

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