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A process for the preparation of a sulfur foam material and, in particular, for suitable adducts of, if necessary, modified sulfur and organic, proton acidity
A process for the preparation of a sulfur foam material and, in particular, for suitable adducts of, if necessary, modified sulfur and organic, proton acidity
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机译:制备硫泡沫材料的方法,特别是用于必要时改性硫和有机质子酸度的合适加合物的制备方法
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摘要
Foams contg. at least 50 wt. % sulphur for use as insulation materials, construction materials, and base layers for road surfaces are prepd. by reaching (I) a polyisocyanate or a polyisothiocyanate, and (II) a prod. prepd. by reacting molten sulphur with an org. protonic a acid that reacts to form a sulphur-contg. org. acid contg. protonic acid groups. Process gives high quality flexible or rigid foams having a low flammability, uniform cell structure, and good physical properties.
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