Phosphorus compound

Patent 6794528 Issued on September 21, 2004. Estimated Expiration Date:

April 20, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Polyesters containing bicyclic phosphate flame retardant Patent #: 3947423
Issued on: 03/30/1976
Inventor: Hills

Inventors

Assignee

Daicel Chemical Industries, Ltd.

Application

No. 10018971 filed on 04/20/2001

US Classes:

558/70, Phosphorus esters (i.e., compounds having the phosphorus ester group, wherein trivalent or pentavalent phosphorus and carbon are bonded directly to the same divalent chalcogen, and wherein the carbon may be single bonded to any atom but may be multiple bonded only to carbon)560/116Plural alicyclic rings in acid moiety

Examiners

Primary: Killos, Paul J.

Attorney, Agent or Firm

Birch, Stewart, Kolasch & Birch, LLP

Foreign Patent References

0 116 200 EP 08/01/1984
49-10124 b JP 03/01/1974
51-19858 JP 06/01/1976
57-55947 JP 04/01/1982
58-187451 JP 11/01/1983
2-18336 JP 04/01/1990
3-14072 JP 02/01/1991
5-1079 JP 01/01/1993
9-286910 JP 11/01/1997
11-35833 JP 02/01/1999
9731925 WO 09/01/1997

International Classes

C07C 902
C07C 6874

Abstract

The phosphorus-containing compound of the present invention is represented by the following formula (I), (II) or (III): wherein Z1, Z2 and Z3 each represents a cycloalkane, a cycloalkene, a polycyclic aliphatic hydrocarbon or an aromatic hydrocarbon rings which may have a substituent; R represents a halogen atom, a hydroxyl, a carboxyl, a halocarboxyl(haloformyl), an alkyl, an alkoxy, an alkenyl or an aryl groups; A represents a polyvalent group corresponding to an alkane; Y1, Y2 and Y3 each represents —O—, —S— or —NR1—, wherein R1 represents a hydrogen atom or an alkyl group; k is an integer of 1 to 6; m is an integer of 0 to 2; n is an integer of not less than 1; q is an integer of 0 to 5; r is 0 or 1; and S is an integer of 1 to 4.The phosphorus-containing compound is excellent in heat resistance and is useful as flame retardants, plasticizers, or stabilizers.