Stabilizer mixtures for plastics

Patent 4806580 Issued on February 21, 1989. Estimated Expiration Date:

October 9, 2007. 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

Ortho-substituted aryl phosphite additive composition
Patent #: 4348308
Issued on: 09/07/1982
Inventor: Minagawa , et al.

Chroman derivatives useful as stabilizers for polypropylene and ଲ-carotin
Patent #: 4404304
Issued on: 09/13/1983
Inventor: Horner , et al.

Chroman derivatives and stabilized polypropylene composition
Patent #: 4511685
Issued on: 04/16/1985
Inventor: Nissen , et al.

Stabilizers Patent #: 4680327
Issued on: 07/14/1987
Inventor: Hettche , et al.

Inventors

Assignee

BASF Aktiengesellschaft

Application

No. 07/107461 filed on 10/09/1987

US Classes:

524/110, Six-membered chalcogen ring252/400.24, Trivalent P (e.g., phosphorous acid, phosphites, etc.)252/404, Phenol or quinone radical containing524/126, Phosphorus bonded directly to only two chalcogen atoms and having at least one P-C linkage, e.g., phosphinate, phosphonite, etc.524/147, Phosphorus directly bonded to oxygen524/151, Two or more aryl groups524/153Triphenyl phosphite per se

Examiners

Primary: Morgan, Kriellion S.

Attorney, Agent or Firm

Keil & Weinkauf

International Classes

C08K 5/00 (20060101)
C08K 5/378 (20060101)
C08K 5/524 (20060101)
C08K 5/5393 (20060101)
C08K 5/1545 (20060101)

Foreign Application Priority Data

1986-10-10 DE

Abstract

Stabilizer mixtures for stabilizing plastics comprising one part by weight of a chroman derivative (I) of the general formula ##STR1## where R= ##STR2## where Z=C7 -C30 -alkyl, --CH2 CH2 --S--[C1 -C30 -alkyl] or ##STR3## and from 5 to 14 parts by weight of an organic phosphite of the general formula (II) ##STR4## where R1, R2 and R3 are identical of different alkyl and/or aryl or of an organic phosphonite of the formula (III) ##STR5## where +is C(CH3)3, a mixing ratio (a):(b) of from 1:6 to 1:10 being preferred.