Water-soluble or water-dispersible graft polymers of proteins as leather tanning agents

Patent 5714560 Issued on February 3, 1998. Estimated Expiration Date:

November 13, 2016. 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

2205882

3651210

Method for treating pelts and leather
Patent #: 4314800
Issued on: 02/09/1982
Inventor: Monsheimer , et al.

Preparation of latices
Patent #: 4812550
Issued on: 03/14/1989
Inventor: Erickson , et al.

Polymeric tanning agents Patent #: 5425784
Issued on: 06/20/1995
Inventor: Denzinger, et al.

Inventors

Assignee

BASF Aktiengesellschaft

Application

No. 737329 filed on 11/13/1996

US Classes:

527/201, With ethylenically unsaturated reactant8/94.1R, TREATMENT OF HIDES, SKINS, FEATHERS AND ANIMAL TISSUES8/94.18, With organic material8/94.19C, Resin condensation in situ in leather8/94.19R, Tanning8/94.33, With organic material527/202Polymerization in the presence of a specified material

Examiners

Primary: Krass, Frederick

Attorney, Agent or Firm

Oblon, Spivak, McClelland, Maier & Neustadt, P.C.

International Classes

C14C 003/22
C08F 289/00

Foreign Application Priority Data

1994-05-13 DE

Abstract

Water-soluble or water-dispersible graft polymers which are obtainable by free-radical-initiated polymerization of(A) a monomer or monomer mixture comprising(a) from 20 to 100% by weight of acrylic acid or methacrylic acid or a mixture thereof or alkali metal, alkaline earth metal or ammonium salts thereof,(b) from 0 to 80% by weight of other monoethylenically unsaturated monomers which can be copolymerized with the monomers (a), and(c) from 0 to 5% by weight of monomers containing at least 2 ethylenically unsaturated, non-conjugated double bonds in the molecule,in the presence of proteins (B)in an A:B weight ratio of from (95 to 10):(5 to 90), are used as tanning agents for self-tanning, pretanning and assist tanning of pelts and skin pelts and for the retanning of leather and skin.