Flame-resistant polycarbonates containing units deriving from halogenated carbonyl compounds in their polymer chain
申请人:ENICHEM S.p.A.
公开号:EP0372624A2
公开(公告)日:1990-06-13
Flame-resistant thermoplastic branched polycarbonates of high molecular weight are prepared from:
(1) a carbonate precursor;
(2) at least one dihydroxyaromatic compound of formula:
where:
R is a single bond, or a substituted or non-substituted linear or branched C₁-C₅ alkylene radical, or a group chosen from O, S, SO₂ and CO;
X and Y, which may be the same or different, are H or CH₃;
m and n, which may be the same or different, are whole numbers from 1 to 4;
(3) at least one halogenated carbonyl compound of formula:
where: Z is a group chosen from O, S and NH;
R₁ and R₂, which may be the same or different, are chlorine or bromine;
R is hydrogen or chlorine or bromine or a C₁-C₃ alkyl radical;
p is zero or 1 or 2.
高分子量阻燃热塑性支链聚碳酸酯由以下材料制备而成:
(1) 碳酸酯前体;
(2) 至少一种式中的二羟基芳香族化合物:
其中
R 是单键,或取代或非取代的直链或支链 C₁-C₅亚烷基,或选 自 O、S、SO₂ 和 CO 的基团;
X 和 Y(可以相同或不同)是 H 或 CH₃;
m 和 n,可以相同,也可以不同,均为 1 至 4 的整数;
(3) 至少一种式中的卤代羰基化合物:
其中Z 是选自 O、S 和 NH 的基团;
R₁ 和 R₂ 可以相同或不同,均为氯或溴;
R 是氢或氯或溴或 C₁-C₃ 烷基;
p 为 0 或 1 或 2。