A kind of polyurethane micro flexible foam

Abstract

The invention discloses a polyurethane miniature flexible foam plastic, which comprises the following parts by weight: component A: 250-300 parts; component B: 100 parts; said component A includes coefficient parts by weight: polyether polyol: 30 parts Parts of polyester polyol: 50 parts of crosslinking agent: 50 parts of catalyst: 0.5 part of blowing agent: 5 parts; the component B is isocyanate. 2‑butyne‑1,4‑diol diglyceride, panthenyl ethyl ether, 4‑[(1Z,3Z)‑4‑(3,4‑dihydroxyphenyl)‑2,3‑diiso The addition of cyanobut-1,3-dienyl]benzene-1,2-diol to replace the castor oil base, and the position of the active group of the chain segment of these substances is fixed, so the reaction conditions are also relatively easy to control, forming The product is relatively stable, and it is found in actual production that its performance is similar to or even better than that of castor oil-based polyurethane.

Description

technical field [0001] The present invention relates to a kind of polyurethane, more specifically relates to a kind of polyurethane micro flexible foam plastic. Background technique [0002] Flexible foam (flexible foam) is less compressible, and can immediately return to its original shape after the stress is removed, and there is almost no residual deformation of the foam. [0003] In the prior art, castor oil-based polyols are used to polymerize and synthesize flexible foam plastics. The castor oil-based flexible foam plastics have good mechanical properties, but the castor oil base itself has many side groups, and the reaction process It is not easy to control, which leads to large differences in the performance of the product from batch to batch. Contents of the invention [0004] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a polyurethane miniature flexible foam plastic with small performance gap between different b...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, castor oil-based polyols are used to polymerize and synthesize flexible foam plastics. The castor oil-based flexible foam plastics have good mechanical properties, but the castor oil base itself has many side groups, and the reaction process It is not easy to control, which leads to a large difference in the performance of the product from batch to batch

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