Ultra-soft protein-like wet-process resin, and preparation method and application thereof

Abstract

The invention relates to an ultra-soft protein wet resin which is prepared from 5%-10% of polyester / polyether glycol, 0.3%-0.7% of double-hydroxyl-terminated polyether modified silicone oil, 0.3%-1% of ethylene glycol, 2%-5% of diphenylmethane-4,4'-diisocyanate, 15%-20% of polyvinyl alcohol powder, 0.15%-0.25% of polyamide wax and 68%-73% of N,N-dimethylformamide. The present invention also discloses a preparation method of the ultra-soft protein-like wet-process resin. A wet-process leather base prepared from the polyurethane polyvinyl alcohol blend wet-process resin according to the formulation and synthesis process has a strong sense of sponge, honeycombed cell structure like dermal protein fiber and fine crease, and has the characteristics, like dermal protein fiber, of softness, comfort, relaxation and warmness.

Description

technical field [0001] The invention relates to the technical field of preparation of blended modified polyurethane resins, and more specifically relates to a supersoft polyurethane / polyvinyl alcohol blended wet-process resin with a handle similar to protein fibers, as well as its preparation method and application. Background technique [0002] Polyurethane resin for synthetic leather is a new type of polymer material used to partially replace natural leather. With the depletion of natural resources, natural leather resources will become increasingly insufficient to meet the growing market demand. With the competition of the synthetic leather industry Intensified day by day, people have higher and higher requirements for polyurethane resin for synthetic leather, ordinary polyurethane resin can no longer meet people's requirements, and then some artificial leather synthetic leather materials have become the focus of the market. [0003] Generally, polyurethane synthetic leat...

AI Technical Summary

Problems solved by technology

[0002] Polyurethane resin for synthetic leather is a new type of polymer material used to partially replace natural leather. With the depletion of natural resources, natural leather resources will become increasingly insufficient to meet the growing market demand. With the competition of the synthetic leather industry With the increasing intensity, people have higher and higher requirements for polyurethane resin for synthetic leather. Ordinary polyurethane resin can no longer meet people's requirements, and some artificial leather synthetic leather materials have become the focus of the market.

[0003] Generally, polyurethane synthetic leather products on the market have low cell density, small cells, or elongated cells because of their cell structure. The cell density is quite different from the protein fiber network structure in animal skins. , so the synthetic leather is not as soft and natural as natural animal leather.

In order to form a network structure similar to leather protein fibers, one direction of making artificial leather synthetic leather products is to form a honeycomb microporous structure, and use polyurethane alone to make synthetic leather wet-laid bass (note: add polyurethane resin DMF solvent and other fillers and additives are used to make a mixed solution. After degassing by a vacuum machine, dip or coat it on the base cloth, and then put it in water to replace the solvent. The polyurethane resin gradually solidifies to form a microporous polyurethane grain layer. Although it can form micropores by rolling, drying and shaping to make wet method bass), the number and density of micropores have certain limitations.

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