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US 5,334,692 AGranted
Highly branched polyphosphonates based on melamine
AssigneeBayer Aktiengesellschaft
InventorsBernhard Hess, Wolfgang Schulz-Schlitte, Jurgen Kirsch, Dieter Freitag, Uwe Arndt, Hans-Georg Gehrke, Klaus Zander
Life of this patent
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Abstract
New, highly branched polyphosphonates which have a greatly improved flame retardant action compared with known polyphosphonates which are suitable as additives for plastics. In addition the new polyphosphonates may be incorporated in plastics as stabilizers with excellent migration properties.
Claims5
Highly branched compounds composed of phosphorus-containing structural units and melamine units, comprising:
- A) from 70 to 99.5% by weight of structural units corresponding to formula (AI) or (AI') ##STR14## wherein R.sub.1 stands for a C.sub.1 -C.sub.10 alkyl group or an aromatic ring having 6 to 12 carbon atoms,
- D stands for oxygen,
- d denotes 1,
- n stands for integers from 2 to 1000 and
- X stands for the following formula ##STR15## wherein Y denotes a single bond or C.sub.1 -C.sub.3 -alkylene, C.sub.5 -C.sub.12 -cycloalkylene, O, S, CO or SO.sub.2,
- R' and R" denote, independently, C.sub.1 -C.sub.10 -alkyl, halogen, phenyl or hydrogen,
- a stands for zero or 1, and
- t.sub.1 and t.sub.2 denote, independently, 0, 1, 2, 3 or 4, or
- X denotes a naphthylene or phenolphthalein group, and
- B) from 0.5 to 30% by weight of structural units of one or more compounds corresponding to formula (BII) or (BIII) ##STR16## wherein R.sub.2 stands for a CH.sub.2 --O structural unit or hydrogen
- R.sub.3 stands for a CH.sub.2 --O structural unit and
- T stands for an optionally substituted C.sub.1 -C.sub.10 -alkylene, C.sub.5 -C.sub.10 -cycloalkylene or C.sub.6 -C.sub.10 -arylene group or an optionally substituted diphenylmethane group,
- together with structural units derived from polyphenols having 3 or 4 aromatic OH groups.
10 more elements
A thermoplastic molding composition comprising:
- i) 30 to 98% by weight of polyalkylene terephthalate;
- and
- ii) 2 to 30% by weight of highly branched compounds composed of phosphorus-containing structural units and melamine units, comprising:
- A) from 70 to 99.5% by weight of structural units corresponding to formula (AI)or (AI') ##STR17## wherein R.sub.1 stands for a C.sub.1 -C.sub.10 alkyl group or an aromatic ring having 6 to 12 carbon atoms,
- D stands for oxygen,
- d denotes 1,
- n stands for integers from 2 to 1000 and
- X stands for the following formula ##STR18## wherein Y denotes a single bond or C.sub.1 -C.sub.3 -alkylene, C.sub.5 -C.sub.12 -cycloalkylene, O, S, CO or SO.sub.2,
- R' and R" denote, independently, C.sub.1 -C.sub.10 -alkyl, halogen, phenyl or hydrogen,
- a stands for zero or 1, and
- t.sub.1 and t.sub.2 denote, independently, 0, 1, 2, 3, or 4 or
- X denotes a naphthylene or phenolphthalein group, and
- B) from 0.1 to 40% by weight of structural units of one or more compounds corresponding to formula (BII) or (BIII) ##STR19## wherein
- R.sub.2 stands for a CH.sub.2 --O structural unit or hydrogen
- R.sub.3 stands for a CH.sub.2 --O structural unit and
- T stands for an optionally substituted C.sub.1 -C.sub.10 -alkylene, C.sub.5 -C.sub.10 -cycloalkylene or C.sub.6 -C.sub.10 -arylene group or an optionally substituted diphenylmethane group,
- together with structural units derived from polyphenols having 3 or 4 aromatic OH groups.
14 more elements
Dependencies are inferred from the claim text.