US 7,320,764 B2 | ||
Phosphite ester additive compositions | ||
Donald R. Stevenson, Dover, Ohio (US); Thomas C. Jennings, Shaker Heights, Ohio (US); Mark E. Harr, New Philadelphia, Ohio (US); and Michael R. Jakupca, Canton, Ohio (US) | ||
Assigned to Dover Chemical Corporation, Dover, Ohio (US) | ||
Filed on May 11, 2004, as Appl. No. 10/709,510. | ||
Application 10/709510 is a continuation in part of application No. 10/086619, filed on Mar. 01, 2002, granted, now 6,824,711, filed on Nov. 30, 2004. | ||
Claims priority of provisional application 60/315746, filed on Aug. 29, 2001. | ||
Claims priority of provisional application 60/314181, filed on Aug. 16, 2001. | ||
Claims priority of provisional application 60/273303, filed on Mar. 02, 2001. | ||
Prior Publication US 2004/0183054 A1, Sep. 23, 2004 | ||
This patent is subject to a terminal disclaimer. | ||
Int. Cl. C08K 13/00 (2006.01); C08K 5/524 (2006.01); C08K 5/098 (2006.01) |
U.S. Cl. 252—400.24 [252/602; 252/609; 524/128; 524/147; 524/151] | 37 Claims |
1. A vinyl resin stabilizer additive composition which consists of:
at least two phosphite esters selected from the group consisting of alkyl bisphenol-A phosphites and pentaerythritol phosphites;
and
a zinc additive wherein a molar ratio of P/Zn is from about 80:1 to 4:1, and further wherein said additive composition is
free of calcium, cadmium, barium and tin; and further wherein
said alkyl bisphenol-A phosphite is of formula (IV)
![]() wherein
R1 is independently selected from the group consisting of H, C1-18 alkyl, C1-18 alkoxy, halogens and
R3 is C10-15 alkyl, and
m is an integral value from 0 to 5 inclusive, and wherein
said pentaerythritol phosphite is of formula (VI)
![]() wherein
R4 is selected from the group consisting of C8-18 alkyl, C6-30 aryl, C6-30 fused aryl rings, C7-35 alklylaryl, C7-35 arylalkyl and substituted derivatives thereof wherein the substituents are selected from the group consisting of halogens,
hydroxyl, C1-4 alkyl and C1-4 alkoxy.
|