A dense thermoplastic polyurethane for the preparation of porous structures

Abstract

A kind of dense thermoplastic polyurethane for preparing porous structure of the present invention comprises thermoplastic polyurethane A and thermoplastic polyurethane B; Wherein, the quality of thermoplastic polyurethane B is 0.5-10% of the total mass of thermoplastic polyurethane A; Described thermoplastic polyurethane A is made of Polyisocyanate A1, polyhydroxy macromolecule compound A2, and polyhydroxy small molecule compound A3 are obtained by polymerization, and the mass of NCO in thermoplastic polyurethane A after polymerization is 0 to 0.1 wt% of the total mass; the thermoplastic polyurethane B is composed of polyisocyanate A1, The polyhydroxy macromolecule compound B2 and the polyhydroxy small molecule compound A3 are obtained by polymerization, and the mass content of NCO in the thermoplastic polyurethane B after polymerization is 1-15 wt% of the total mass of the thermoplastic polyurethane B. The thermoplastic polyurethane of the present invention is used as a base material for preparing a porous structure molded body, which can effectively stabilize the cell structure of porous particles, and has outstanding welding and molding effect of the molded body, and is especially suitable for the method of welding by high-energy radiation.

Description

A kind of dense thermoplastic polyurethane for preparing porous structure technical field The present invention relates to a kind of dense thermoplastic polyurethane for the preparation of porous structure, the present invention also relates to the utilization of the Porous structured particles obtained from dense thermoplastic polyurethane, shaped bodies and uses thereof. Background technique Thermoplastic polyurethane material, as a kind of high molecular polymer material of thermoplastic molding, because of its excellent performance from Applications are used in daily life to industrial fields. Depending on the field of application, thermoplastic polyurethane can be applied in various ways Processed into sheet, film, porous, etc., wherein the thermoplastic polyurethane porous material is foamed in thermoplastic through physical or chemical foaming. Polyurethane introduces gas and forms a porous structure inside, so that it has the characteristics of low density a...

AI Technical Summary

Problems solved by technology

[0003] At present, problems such as difficulty in foaming, uneven cells, shrinkage after foaming, or easy collapse in welding molding commonly exist in the process of preparing thermoplastic polyurethane moldings, and technicians pay more attention to the process improvement of foaming and molding processes. However, there are few studies on the structural properties of thermoplastic polyurethane itself.

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