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US Patent 5306606 - Biaxially stretched polyester film comprising a coating layer containing a salt of a sulfonic acid type polymer

US Patent Issued on April 26, 1994
Estimated Patent Expiration Date: Icon_subject December 23, 2011Estimated 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.
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Abstract

Disclosed is a biaxially stretched polyester film which comprises a polyester film and a coating layer composed of a resin composition comprising (A) an acrylic polymer and/or (B) a polyester copolymer and at least (C) a polymer containing a monomer having a sulfonic acid group neutralized with an organic amine in its recurring unit or (D) a polymer containing a monomer having a sulfonic acid group neutralized with ammonium on at least one surface of the polyester film.

Inventors

Assignee

Application

No. 813883 filed on 12/23/1991

US Classes:

430/533, Polyester or polycarbonate428/482, Of cross-linked polyester428/483, Next to addition polymer from unsaturated monomers428/516, Monoolefin polymer428/520, Ester, halide or nitrile of addition polymer428/910, PRODUCT WITH MOLECULAR ORIENTATION430/528, Ammonium salt430/529, Organic carboxylic, sulfur or phosphorus acid or salt430/535, Polymer of unsaturated ester or halide430/536Polymer of unsaturated monomer

Field of Search

428/483, Next to addition polymer from unsaturated monomers428/516, Monoolefin polymer428/520, Ester, halide or nitrile of addition polymer428/482, Of cross-linked polyester428/910, PRODUCT WITH MOLECULAR ORIENTATION430/529, Organic carboxylic, sulfur or phosphorus acid or salt430/528, Ammonium salt430/535, Polymer of unsaturated ester or halide430/536, Polymer of unsaturated monomer430/533Polyester or polycarbonate

Examiners

Primary: Thibodeau, Paul J.
Assistant: Le, H. Thi

Attorney, Agent or Firm

US Patent References

4880700, Novel oriented polyester film composites
Issued on: 11/14/1989
Inventor: Charmot, et al.
4908277, Polyester film
Issued on: 03/13/1990
Inventor: Tsunashima, et al.
5045580, Antistatic thermoplastic polyester resin composition
Issued on: 09/03/1991
Inventor: Kitamura
5079136Plastic film with antistatic layer and silver halide photographic light-sensitive material using the same
Issued on: 01/07/1992
Inventor: Tachibana, et al.

International Class

B32B 027/06

Foreign Application Priority Data

1990-12-31 JP

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