发明名称 |
PROCESS FOR THE PREPARATION OF GRANULAR OXYMETHYLENE POLYMERS HAVING IMPROVED MECHANICAL PROPERTIES |
摘要 |
<p>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 70.mu.m. 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.</p> |
申请公布号 |
CA1106097(A) |
申请公布日期 |
1981.07.28 |
申请号 |
CA19780308974 |
申请日期 |
1978.08.09 |
申请人 |
HOECHST AKTIENGESELLSCHAFT |
发明人 |
BURG, KARLHEINZ;HELLER, ALWIN;SABEL, HANS-DIETER;SCHLAF, HELMUT;SEXTRO, GUENTER |
分类号 |
C08J3/14;C08J3/12;(IPC1-7):08G2/28;08J3/12 |
主分类号 |
C08J3/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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