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公开(公告)号：US3789028A
公开(公告)日：1974-01-29
申请号：US3789028D
申请日：1972-07-03
Applicant: HOECHST AG
CPC classification number: C08J9/224 , C08J2325/04
Abstract: FOAMABLE PARTICLES OF THE STYRENE POLYMERS AND A VOLATILE BLOWING AGENT AND A LIPOPHILIC SURFACE-ACTIVE COATING AGENT, WHEREIN THESE PARTICLES CONTAIN, AS A COATING AGENT, FROM 0.05 TO 0.5% BY WEIGHT, CACULATED ON THE BLOWING AGENT CONTAINING STYRENE POLYMER, OF MIXTURES OF MONO-, DI- AND TRI-ESTERS OF GLYCEROL WITH SATURATED FATTY ACIDS HAVING FROM 12 TO 22 CARBON ATOMS, OR MIXTURES THEREOF. THESE FOAMABLE PARTICLES OFFER AN ESSENTIAL
SHORTENING OF THE COOLING TIME DURING FOAMING, A BETTER BOND OF THE FOAMED PARTICLES AND A SUBSTANTIALLY UNIFORM DISTRIBUTION OF THE GROSS UNIT WEIGHT IN THE FOAM BLOCK.-
公开(公告)号：DK129852B
公开(公告)日：1974-11-25
申请号：DK332872
申请日：1972-07-04
Applicant: HOECHST AG
Abstract: 1392467 Coated foamable polymer particles HOECHST AG 5 July 1972 [5 July 1971] 31435/72 Heading B2E [Also in Division C3] Coated foamable polymer particles are made by coating styrene polymer particles containing a volatile blowing agent with an ester of glycerol with at least one C 12-22 fatty acid e.g. a mixture of a mono-, di- and tri-ester of glycerol with stearic and palmitic acids or a mixture of fatty acids obtained by hydrogenation and saponification of beef tallow or coconut oil. The polymer may be polystyrene or a copolymer of styrene with methyl-styrene and/or acrylonitrile. The blowing agent may be pentane or a chloro- or fluorochlorohydrocarbon. The polymer particles may be coated with a solution of the glycerol ester in a solvent or with the ester in powder form.
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