US Patent 7101590 Extrusion coating compositions and method

Patent 7101590 was granted and assigned to Valspar on September, 2006 by the United States Patent and Trademark Office.

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Patent

Patent attributes

Current Assignee

Valspar

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

71015900

Patent Inventor Names

Stephen Postle0

Louis Sharp0

Martin Lu0

Rolf Jung0

Artemia Jimenez0

Christian Schmid0

Hans Widmer0

Date of Patent

September 5, 2006

Patent Application Number

109761180

Date Filed

October 28, 2004

Patent Primary Examiner

‌

Jeffrey B. Robertson

Patent abstract

Solid extrusion coating compositions for metal substrates, a method of extrusion coating a metal substrate, and a metal article are disclosed. The extrusion coating composition is a thermoplastic material and comprises: (a) a polyester having a weight average molecular weight of about 10,000 to about 50,000, and optionally, (b) a modifying resin, such as an epoxy resin having an epoxy equivalent weight of about 500 to about 15,000. The extrusion coating composition is applied to a metal substrate in an extrusion process to provide a composition film having a thickness of about 1 to about 40 microns.

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