Polyurethane resin used for slow-recovery sponge, and preparation method and application thereof

Abstract

The invention discloses a polyurethane resin used for slow-recovery sponge, and a preparation method and an application thereof. The resin comprises a resin A component, a resin B1 component and a resin B2 component, and the resin A component comprises polyol A, a cross-linking agent, a catalyst, a foaming agent and a foam stabilizer; the resin B1 comprises 100 parts of isocyanate B1, 10-40 parts of polyol B1 and 0.002-0.010 parts of a side reaction inhibitor, the resin B2 comprises 100 parts of isocyanate B2, 50-100 parts of polyol B2 and 0.002-0.010 parts of the side reaction inhibitor, the isocyanate B1 is methyl diphenylene diisocyanate, carbodiimide modified methyl diphenylene diisocyanate, toluene diisocyanate or diisocyanatonaphthalene, the polyol B1 is polyether triol, the isocyanate B2 is methyl diphenylene diisocyanate, carbodiimide modified methyl diphenylene diisocyanate, toluene diisocyanate or diisocyanatonaphthalene, and the polyol B2 is polyether polyol. Slow-recovery polyurethane sponge with different hardness values can be produced, and the cost is low.

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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