Breathable polyurethane synthetic leather preparation method

Abstract

The invention belongs to the technical field of synthetic leather preparation and relates to a breathable polyurethane synthetic leather preparation method. The method includes: subjecting octamethyl cyclotetrasiloxane and gamma-aminoethyl aminopropyl trimethoxysilane to ring opening and polymerization to obtain amino modified silicon oil; reacting with polytetrahydrofuran glycol to obtain polyether modified amino silicon oil; reacting with isophorone diisocyanate to obtain a prepolymer; reacting with 2,2-dimethylolpropionic acid and the like, and carrying out operations such as neutralizing to obtain polyether amino silicon oil modified polyurethane; fermenting gluconacetobacter and polyether amino silicon oil modified polyurethane to obtain bacterial cellulose; mixing with part of polyether amino silicon oil modified polyurethane, adding additives, stirring, coating, and performing operations of solidifying, washing, drying and the like to obtain breathable polyurethane synthetic leather. The breathable polyurethane synthetic leather prepared according to the method is higher than 720mL / cm<2>.h in air permeability and light and comfortable to wear and is excellent in water permeability which is higher than 952g / m<2>.24h.

Description

technical field

[0001] The invention relates to a preparation method of breathable polyurethane synthetic leather, which belongs to the technical field of synthetic leather preparation. Background technique

[0002] Synthetic leather is a kind of base material with various cloth bases, and resin is coated on the base material to make it have various patterns, patterns, functions and handles. At present, synthetic leather is more and more widely used in the fields of clothing, sports shoes, sofas and bags, which to a large extent makes up for the limitations brought about by the scarcity of animal skins to related preparation industries. In an industrial sense, it is not only suitable for modern large-scale production, but also can protect the ecology, reduce environmental pollution, and make full use of non-natural resources.

[0003] Polyurethane molecules contain two kinds of soft and hard segment components, which can form a special microphase separation structure, so th...