Process for preparing oxymethylene polymers in a granular form

Details Process for preparing oxymethylene polymers in a granular form Process for preparing oxymethylene polymers in a granular form

C - Chemistry, Metallurgy

08

G

402/104, 402/121

C08G 2/28 (2006.01) C08J 3/12 (2006.01)

Patent

CA 1055192

PROCESS FOR PREPARING OXYMETHYLENE POLYMERS IN A GRANULAR FORM Abstract of the disclosure: Oxymethylene polymers are obtained in a granular form by cooling a solution or dispersion of an oxymethylene polymer, the temperature of which solution or dispersion is above the sintering temperature of the oxymethylene polymer, to a tem- perature just below the sintering temperature of the oxymethy- lene polymer. As dissolving or dispersing agent as well as precipitating and cooling agent there is used a mixture of methanol and water having a methanol content of at least 75% by weight. The oxymethylene polymer obtained is suitable as engineering plastic for preparing moulded articles.

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