C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/103, 402/121
C08G 2/28 (2006.01) C08J 3/12 (2006.01)
Patent
CA 1106097
Abstract of the disclosure Oxymethylene polymers (POM) are obtained in a granular form, by cooling a POM solution or dispersion, whose temperature is above the sintering temperature of the POM, to a temperature slightly below the sintering temperature of the POM, and extracting from the suspension obtained only those POM particles which show a grain diameter of more than 70µm. As solvent or dispersing agent as well as precipitating and cooling agent there is used a mixture of methanol and water with a methanol content of at least 75 % by weight. The POM obtained is suitable as engineering plastic material for the manufacture of shaped articles having improved mechanical properties.
308974
Burg Karlheinz
Heller Alwin
Sabel Hans-Dieter
Schlaf Helmut
Sextro Gunter
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
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