A kind of preparation method of organosilicon/waterborne polyurethane interpenetrating network polymer emulsion containing zinc phthalocyanine for synthetic leather

Abstract

The invention belongs to the technical field of synthetic leather and discloses a preparation method of a zinc phthalocyanine-containing organosilicone / waterborne polyurethane interpenetrating polymernetworked polymer emulsion for synthetic leather. The method comprises the following steps of (1) dissolving zinc metal phthalocyanine into solvent, then adding in silane coupling agent as modifier,and under action of basic catalysts and in a nitrogen atmosphere, obtaining silane coupling agent-modified zinc metal phthalocyanine; (2) preparing a polyurethane prepolymer; (3) adding the prepared silane coupling agent-modified zinc metal phthalocyanine into the polyurethane prepolymer to obtain a zinc phthalocyanine-containing organosilicone / waterborne polyurethane interpenetrating polymer networked polymer; (4) placing the prepared zinc phthalocyanine-containing organosilicone / waterborne polyurethane interpenetrating polymer networked polymer in hot water, placing the mixture into a high gravity reactor to obtain the zinc phthalocyanine-containing organosilicone / waterborne polyurethane interpenetrating polymer networked polymer emulsion for synthetic leather. The zinc phthalocyanine-containing organosilicone / waterborne polyurethane interpenetrating polymer networked polymer emulsion for synthetic leather is good in photocatalytic effects, stable under light and heat and free from toxicity and harm and achieves antibacterial and mildew-proof effects.

Description

technical field [0001] The invention relates to the technical field of synthetic leather, in particular to a preparation method of an organic silicon / waterborne polyurethane interpenetrating network polymer emulsion containing zinc phthalocyanine for synthetic leather. Background technique [0002] Polyurethane (PU) synthetic leather, as a type of polyurethane elastomer, has the appearance, feel and mechanical properties similar to natural leather, and is currently the most popular and mainstream product in synthetic leather. Then, the special molecular structure of polyurethane, the fiber components in the synthetic leather base cloth and the auxiliary agents contained in the synthetic leather such as protein adhesives, lignocellulose fillers, etc. can provide a rich source of nutrients for the growth of microorganisms, making the polyurethane synthetic leather extremely It is easily rotted and deteriorated by microorganisms, and the service life is greatly shortened. At th...

AI Technical Summary

Problems solved by technology

The traditional photocatalytic antibacterial treatment method is mainly to dope polyurethane with inorganic photoacid media, mainly nano-titanium dioxide, by blending or in-situ generation method, and the addition of titanium dioxide by blending has poor compatibility, easy migration, and poor washability; The original flavor method solves the compatibility problem, but the cost of the titanium alkoxide precursor used is high, and the nano-titanium dioxide produced by the original flavor is tightly contained by the polymer, which makes it difficult for photogenerated electron-hole recombination to occur, and the antibacterial property is poor

In addition, nano-titanium dioxide composite materials can only exert antibacterial effect under the action of ultraviolet rays, and ultraviolet rays account for less than 5% of sunlight, and ultraviolet rays have certain harm to human tissues.