Paint film composites and methods of making and using the same

Patent metadata

Field	Value
Publication number	US-8932424-B2
Application number	US-93403809-A
Country	US
Kind code	B2
Filing date	Mar 18, 2009
Priority date	Mar 25, 2008
Publication date	Jan 13, 2015
Grant date	Jan 13, 2015

Abstract

Paint film composites comprise sheet metal, a color layer, and an optional transparent protective layer. Methods of making and using the paint film composites, and shaped articles made thereby, are also disclosed.

First claim

What is claimed is:

1. A method of making a paint film composite, the method comprising:
contacting a curable composition with a releasable first forming web and a releasable second forming web to form a rolling bank of the curable composition disposed at least partially between the first and second forming webs, the curable composition comprising a colorant and a curable polymeric material precursor, wherein the curable polymeric material precursor comprises one or more polyisocyanates and one or more compounds selected from the group consisting of polyols, polyamines, and aminoalcohols;
passing at least a portion of each of the releasable first and second forming webs and the curable composition through a nip while said at least a portion of the curable composition is sandwiched between the releasable first and second forming webs to provide a curable layer precursor;
at least partially curing the curable layer precursor to provide an opaque color layer comprising the colorant and a polymeric material comprising a polyurethane;
separating the first forming web from the color layer; and
permanently adhering the color layer to unpainted sheet metal with an adhesive while the second forming web is in contact with the color layer.

2. The method of claim 1 , the polyurethane being extensible and having hard segments in an amount of from 30 to 70 percent by weight.

3. The method of claim 1 , further comprising permanently deforming the paint film composite.

4. The method of claim 3 , wherein said permanently deforming the paint film composite comprises roll forming or stamping.

5. The method of claim 1 , wherein the adhesive is a pressure-sensitive adhesive.

Assignees

• Johnson Michael A
• Brandys Frank A
• Nielsen Kent E
• Ho Charlie C
• Rajamani Vijay
• 3M Innovative Properties Co

Inventors

• Johnson Michael A
• Brandys Frank A
• Nielsen Kent E
• Ho Charlie C
• Rajamani Vijay

Classifications

• B32B2307/41

  Opaque · CPC title

• Y10T156/10

  Methods of surface bonding and/or assembly therefor · CPC title

• B32B15/095 Primary

  comprising polyurethanes · CPC title

• B32B2307/748

  Releasability · CPC title

• B32B37/15 Primary

  with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state · CPC title