发明名称 |
Fire retardant fine particulate expandable styrene polymers |
摘要 |
Fine particulate expandable flame retardant styrene polymers having an improved minimum mold dwell time and reduced block shrinkage are prepared by: (a) mixing together styrene monomer or a mixture of styrene and a cpolymerizable monomer with an organic halogen compound and an expanding agent in an aqueous disperson; (b) adding before or during polymerization to the mixture of (a) from 0.0001 to 0.1% by weight of an epoxidation product of an aliphatic hydrocarbon of which the epoxidated aliphatic chain comprises from 6 to 18 C atoms, this epoxidation product being soluble in the monomers; (c) carrying out a polymerization in the aqueous suspension of (a) and (b) using radical forming initiators at temperatures of 80 DEG C.-130 DEG C. to form expandable particles; (d) pre-forming the expandable particles resulting from (c); (e) ageing the pre-formed particles of (d); and (f) molding the pre-formed and aged particles of (e) in a pressure resistant mold.
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申请公布号 |
US4419458(A) |
申请公布日期 |
1983.12.06 |
申请号 |
US19830486430 |
申请日期 |
1983.04.19 |
申请人 |
CHEMISCHE WERKE HUELS AG |
发明人 |
RIGLER, JOSEF K.;WIENHOEFER, EKKEHARD;LEITHAEUSER, HORST;TRUKENBROD, KARL |
分类号 |
C08J9/16;C08F2/44;C08J9/00;C08J9/20;(IPC1-7):C08J9/20;C08J9/22 |
主分类号 |
C08J9/16 |
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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