发明授权
US4220732A Microcellular polyurethane foams 失效
微孔聚氨酯泡沫

Microcellular polyurethane foams
摘要:
A method of improving the load-bearing properties of microcellular flexible, urethane foams wherein the processing characteristics for the production thereof are also improved, which comprises utilizing a combination of 1,4-butanediol and phenyldiethanolamine as a chain extender.
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