发明授权
US4990539A Preparation of styrene polymer foam particles 失效
苯乙烯聚合物泡沫颗粒的制备

Preparation of styrene polymer foam particles
摘要:
Styrene polymer foam particles of from 10 to 30 kg/m.sup.3 in density are obtained by foaming styrene polymers which, per kg, contain from 0.7 to 3 moles of blowing agent mixture composed of from 60 to 90 mol % of water and from 10 to 40 mol % of the C.sub.4 - or C.sub.5 -hydrocarbon with the aid of microwaves.
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