A kind of ultra-soft protein wet-process resin and its preparation method and application

Abstract

The invention relates to a supersoft protein wet-process resin, which consists of 5%-10% of polyester / polyether polyol, 0.3%-0.7% of double-terminated hydroxyl polyether modified silicone oil, 0.3%-1% of ethylene glycol, diphenyl Methyl methane-4,4-diisocyanate 2%~5%, polyvinyl alcohol powder 15%~20%, polyamide wax 0.15%~0.25%, N,N-dimethylformamide 68%~73% made. The invention also discloses a preparation method of the ultra-soft protein wet-process resin. The wet-process synthetic leather bass made of the polyurethane polyvinyl alcohol blended wet-process resin synthesized by the above formula and process has a strong sponge feel, a honeycomb-like cell structure similar to leather protein fibers, fine creases, and a texture similar to leather protein fibers. The softness, comfort, nature and warmth of the fiber.

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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