A kind of method that carbodiimide catalyzed amino-terminated hyperbranched polymer is used for leather tanning

Abstract

The invention discloses a method for using carbodiimide catalyzed amino-terminated hyperbranched polymers for leather tanning, and particularly relates to a method which is characterized in that the carbodiimide catalyzed amino-terminated hyperbranched polymers and a raw leather collagen fiber net generate multi-point covalent cross-linking; in the tanning step, the carbodiimide catalyzed amino-terminated hyperbranched polymers and the raw leather collagen fiber net are used for generating multi-point covalent cross-linking, so that the amino-terminated hyperbranched polymers and the raw leather collagen fiber net are used for generating multi-point covalent cross-linking, and thus the damp heat resistance stability and other physical mechanical performance of finished product leather tanned by the amino-terminated hyperbranched polymers can be improved. Under the catalysis of the carbodiimide, the amino-terminated hyperbranched polymers have the capability of singly bearing a tanningagent; a filling agent is re-tanned; the application range of the amino-terminated hyperbranched polymers to leather chemical engineering is expanded. The tanning method provided by the invention usescarbodiimide as the tanning catalyst, and uses the amino-terminated hyperbranched polymers as basic materials; when the method is applied to the leather tanning work section, the finished product leather has the advantages of good damp heat resistance stability, excellent physical mechanical performance, richness, softness and the like are realized.

Description

technical field [0001] The invention relates to the technical field of leather tanning, in particular to a method for using carbodiimide-catalyzed amino-terminated hyperbranched polymers in leather tanning. Background technique [0002] my country is a major processing country in the world's leather industry, and its processing volume and export volume rank first in the world for a long time. However, the non-renewable chrome tanning agent used in the traditional leather tanning process has a greater potential threat to the environment, which is the main factor preventing the sustainable development of the leather industry. one of the problems. Therefore, the development and application of sustainable and renewable organic syntans for leather processing is the focus of research by colleagues at home and abroad. Amino-terminated hyperbranched polymers have been studied as leather auxiliary tanning agents and retanning agents in the past few years, but amino-terminated hyperbr...

AI Technical Summary

Problems solved by technology

Amino-terminated hyperbranched polymers have been studied as leather auxiliary tanning agents and retanning agents in the past few years, but amino-terminated hyperbranched polymers are used alone in the leather tanning process. The tanned leather has low shrinkage temperature, Insufficient physical and mechanical properties, limited application range and other defects, so the application in the leather industry is generally limited to the application of filling and high absorption of dyes in the retanning section

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