发明名称 |
Method of terminating oxymethylene polymerization |
摘要 |
A polyoxymethylene having enhanced thermal stability and resistance to depolymerization is obtained by using an alkylated melamine compound of formula (1) as a polymerization terminating agent in a polymerization of formaldehyde or a cyclic oligomer thereof and an optional comonomer in the presence of an acid catalyst:wherein,R1 to R6 are each independently H, C1-4 alkyl or CH2OR7; R7 is H, C1-4 alkyl or R8COOR9; R8 is -(CH2)n-, n being an integer of 1 to 4; and R9 is C1-4 alkyl.
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申请公布号 |
US6576740(B1) |
申请公布日期 |
2003.06.10 |
申请号 |
US20020031124 |
申请日期 |
2002.01.09 |
申请人 |
KOREA ENGINEERING PLASTICS CO., LTD. |
发明人 |
CHIN CHONG-WON;KIM YOUNG-HEUP;BYUN KYUNG-SEOB |
分类号 |
C08G2/10;C08G2/00;C08G2/06;C08G2/28;(IPC1-7):C08F6/00 |
主分类号 |
C08G2/10 |
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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