A kind of hydrophobic membrane based on fluorine-containing polyurethane and its preparation method

A polyurethane and hydrophobic film technology, applied in the field of polyurethane materials, can solve the problems of insufficient weather resistance and water resistance, reduced mechanical properties of polyurethane products, and failure to reach modified polyurethane, etc., and achieves good water repellency, easy curing, and easy stored effect
CN106750432BActive Publication Date: 2020-04-03SUZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SUZHOU UNIV
Publication Date
2020-04-03

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Abstract

The invention discloses a hydrophobic film based on fluorine-containing polyurethane and a preparation method thereof; the fluorine-containing polyurethane is spin-coated to form a film, and the hydrophobic film based on fluorine-containing polyurethane is obtained after curing; Addition polymerization of isocyanate, catalyzed by tin catalyst, extended by chain extender, and capped with aminosilane coupling agent to obtain fluorine-containing polyurethane; the product has a fluorine-containing polyether block with high fluorine content, located in the polyether The fluoroalkyl group of the side group is prone to microphase separation and surface migration, and the surface energy of the polyurethane is low. The fluorine-containing polyurethane is terminated with a silane coupling agent, which is easy to store and cure. The hydrophobic membrane based on fluorine-containing polyurethane disclosed by the invention has a water contact angle higher than 110° and excellent water repellency.
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Description

technical field

[0001] The invention relates to a polyurethane material, in particular to a hydrophobic membrane based on fluorine-containing polyurethane and a preparation method thereof, belonging to the field of polyurethane and fine chemicals. Background technique

[0002] Polyurethane is a block-type polymer formed by the addition polymerization of polyether and diisocyanate, which is formed by the addition and polymerization of soft segments and hard segments. Its unique molecular structure and aggregated structure make polyurethane have excellent mechanical properties such as toughness and strength. And has superior oil resistance, wear resistance and other properties. Because of this, polyurethane has become one of the most widely used polymer materials today. However, the traditional polyurethane materials have insufficient weather resistance and water resistance. Since these polyurethanes use diisocyanates containing aromatic ring structures as the reactant, the p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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