Soft polyurethane foam with excellent density distribution

Abstract

The invention discloses soft polyurethane foam with excellent density distribution, and belongs to the technical field of polyurethane. The problems that in the prior art, density distribution of foamis not uniform, foam holes are poor and a foaming process is not stable are solved. According to the invention, an synthesized organic silicon surfactant with a relatively low density and a relatively low density gradient is firstly applied to preparation of the polyurethane foam, so that the density distribution of the synthesized polyurethane foam is more uniform, foam holes are more excellent,emulsification performance is better, and the foaming process is more stable.

Description

technical field

[0001] The invention relates to a polyurethane foam, in particular to a flexible polyurethane foam with excellent density distribution, and belongs to the technical field of polyurethane. Background technique

[0002] Polyurethane foam is mainly prepared by generating gas during the polymerization process of raw materials such as polyether (or polyester) polyol, isocyanate, water, catalyst, foam stabilizer and other additives, and the generated gas makes the reaction mixture generate foam to form Uniform and fine cells.

[0003] In modern general polyurethane technology, foam stabilizer (commonly used silicone surfactant) is an indispensable component, it plays the role of emulsifying foam material, stabilizing foam and regulating cells, it increases the interaction of various components Solubility, helps the formation of bubbles, controls the size and uniformity of the cells, promotes the balance of the gel tension of the foam cells, and makes the cell wall...

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