A number of polyester modified rosin with foam formulations have been utilized to prepare rigid urethanefoams.
若干聚酯改性松香及其泡沫配方已用于制备硬质尿烷泡沫。
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The urethanefoams is a kind of high molecular synthetic material and can be used widely. But being burned, it can get out the poisonous gas and results in some accidents with heavy losses of lives.
These chemicals are compatible and processable in urethane foam formulations and less flammable than foams derived from other conventional type glycols.