Polyurethane resin for slow rebound sponge, preparation method and application

Abstract

The invention discloses a polyurethane for slow resilience sponge, its preparation method and application. The resin comprises a resin A component, a resin B1 component and a resin B2 component, and the resin A component includes polypolyol A and a crosslinking agent , catalyst, foaming agent and foam stabilizer; resin B1 includes 100 parts of isocyanate B1, 10 to 40 parts of polypolyol B1, 0.002 to 0.010 parts of side reaction inhibitor, resin B2 includes 100 parts of isocyanate B2, and 50 parts of polypolyol B2 ~100 parts, side reaction inhibitor 0.002~0.010 parts, isocyanate B1 is diphenylmethane diisocyanate, carbodiimide modified diphenylmethane diisocyanate, toluene diisocyanate or naphthalene diisocyanate, polypolyol B1 is poly Ether trihydric alcohol, isocyanate B2 is diphenylmethane diisocyanate, carbodiimide modified diphenylmethane diisocyanate, toluene diisocyanate or naphthalene diisocyanate, polypolyol B2 is polyether polyol. The invention can prepare slow-rebound polyurethane sponges with different hardness and low cost.

Description

technical field [0001] The invention relates to a polyurethane resin for sponge, its preparation method and application. Background technique [0002] The full name of polyurethane is polyurethane, which is a general term for macromolecular compounds containing repeated urethane groups on the main chain. It is a polymer compound obtained by the interaction of binary or polyvalent organic isocyanates and polyol compounds. Polyurethane sponge has the characteristics of light weight and good resilience. [0003] The resin used to produce polyurethane sponge is generally a two-component raw material - polyol mixture and prepolymer (referred to as AB material / AB component or black and white material). [0004] Polyurethane sponges with different performance requirements need to be used with different types of AB materials. For polyurethane sponge production enterprises, it is necessary to be equipped with various types of raw materials of different specifications to adapt to th...

AI Technical Summary

Problems solved by technology

For polyurethane sponge production enterprises, it is necessary to be equipped with raw materials of different types and specifications to adapt to the production of sponges with different performance requirements, and each time the raw materials are replaced, the proofing machine and the material tank need to be cleaned, and the production cost is high.

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