发明名称 |
Linearer, Phosphor enthaltender Copolyester, Verfahren zu seiner Herstellung und seine Anwendung als Flammschutzmittel. |
摘要 |
A linear copolyester, useful as a flame retardant agent, contains in its macromolecule units deriving from: (a) terephthalic acid; (b) (C2-C6)-alkylene glycol; (c) phenyl-hydroxymethylene phosphinic acid, in a mutual ratio comprised within the range of from 1 : 1 : 0.2 to 1 : 1 : 1, amd is obtained by placing a linear polyester deriving from terephthalic acid and a (C2-C6)-alkylene glycol into contact with a poly(phenylhydroxymethylene phosphinate) (I): <CHEM> wherein: Ph is the phenyl radical; R is a hydrogen atom or a linear or branched alkyl radical containing from 1 to 8 carbon atoms; and n is a number comprised within the range of from 2.5 to 100, under melting conditions, and for a contact time not longer than about 30 minutes. Such a copolyester contains the (c) units randomly distributed throughout the macromolecular chain, has an amorphous or partially crystalline structure as a function of its content of said (c) unit, and is useful in order to endow the linear polyesters, also in mixture with one another (polymeric alloys), with flameproof characteristics. |
申请公布号 |
DE68918482(T2) |
申请公布日期 |
1995.04.20 |
申请号 |
DE1989618482T |
申请日期 |
1989.03.15 |
申请人 |
GREAT LAKES CHEMICAL ITALIA S.R.L., MAILAND/MILANO, IT |
发明人 |
LANDONI, GIANLUIGI, I-20129 MILAN, IT;NERI, CARLO, I-20097 SAN DONATO MILANESE MILAN, IT |
分类号 |
C08G63/692;C08L67/00;C08L67/02 |
主分类号 |
C08G63/692 |
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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