×

Cyclic bis and tris phosphites and stabilized synthetic resin compositions

  • US 4,670,492 A
  • Filed: 10/22/1985
  • Issued: 06/02/1987
  • Est. Priority Date: 12/01/1983
  • Status: Expired due to Fees
First Claim
Patent Images

1. Cyclic tris phosphites having the formula:

  • ##STR116## wherein;

    A is selected from the group consisting of sulfur;

    oxygen;

    alkylidene having from one to about six carbon atoms;

    cycloalkylidene having from three to about eight carbon atoms; and

    phenyl and alkyl phenyl alkylidene having from seven to about fourteen carbon atoms;

    R is selected from the group consisting of alkyl having from one to about eighteen carbon atoms;

    cycloalkyl having from three to about eight carbon atoms; and

    phenalkylidene and alkyl phenalkylidene having from seven to about twelve carbon atoms;

    R1 is selected from the group consisting of hydrogen;

    alkyl having from one to about eighteen carbon atoms;

    cycloalkyl having from three to about eight carbon atoms; and

    phenalkylidene and alkyl phenalkylidene having from seven to about twelve carbon atoms;

    n is 3;

    R2 is ##STR117## wherein;

    m=1;

    R3, R4, R5, R6 are hydrogen or lower alkyl; and

    , when the rings are aromatic, at least two of R3, R4, R5 and R6 in each ring is lower alkyl; and

    Y is alkylidene having from three to about six carbon atoms.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×