Methods for sealing the edges of multi-layer articles

Patent metadata

Field	Value
Publication number	US-9804305-B2
Application number	US-201314375029-A
Country	US
Kind code	B2
Filing date	Jan 22, 2013
Priority date	Jan 31, 2012
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

Methods for preparing edge-sealed multi-layer film articles include applying a sealant composition to a multi-layer film article that includes at least one polymeric film layer, and permitting the sealant composition to dry to form an edge-sealed article. The sealant composition includes at least one solvent capable of softening, penetrating or dissolving the polymeric film layer of the multi-layer film article, and at least one polymer dissolved in the solvent. The polymer dissolved in the solvent may be a fluoropolymer, a non-tacky at ambient temperatures(meth)acrylate-based block copolymer, or a combination thereof. Edge-sealed articles prepared by this method can include other polymeric film layers or coated layers such as metallic layers and can be part of larger assemblies.

First claim

What is claimed is:

1. A method of preparing an article comprising:
providing a multi-layer film article comprising at least one polymeric film layer and having an edge;
providing a sealant composition, the sealant composition comprising
at least one solvent capable of softening, penetrating or dissolving the at least one polymeric film layer of the multi-layer film article; and
at least one polymer dissolved in the solvent;

applying the sealant composition to at least a portion of the of the edge of the multi-layer film article; and
permitting the sealant composition to dry to form an edge-sealed article, and wherein the method further comprises the application of a solvent pre-treatment to at least a portion of the edge prior to application of the sealant composition.

2. The method of claim 1 , wherein the at least one polymer comprises a fluoropolymer, a non-tacky at ambient temperatures (meth)acrylate-based block copolymer, or a combination thereof.

3. The method of claim 2 , wherein the non-tacky at ambient temperatures (meth)acrylate block copolymer comprises at least two endblock polymeric unites that are each derived from a first monoethylenically unsaturated monomer comprising a methacrylate, acrylate, styrene, or combination thereof, and each endblock has a Tg of at least 50° C., and at least one midblock polymeric unit that is derived from a second monoethylenically unsaturated monomer comprising a methacrylate, acrylate, vinyl ester, or combination thereof and the midblock has a Tg of no greater than 20° C.

4. The method of claim 1 , wherein the sealant composition comprises additional additives comprising ultraviolet light absorbers, antioxidants, hindered amine light stabilizers (HALS), surfactants, adhesion promoters, dispersants, hydrophobic or hydrophilic enhancing agents, pigments, fillers, opaquifying agents, and combinations thereof.

5. The method of claim 1 , wherein the multi-layer film article comprises at least one metal layer.

6. The method of claim 1 , wherein the solvent comprises a ketone, alcohol, halocarbon, hydrocarbon, aromatic, ester, or combination thereof.

7. The method of claim 1 , wherein the edge comprises a perimeter edge.

8. The method of claim 1 , wherein the edge comprises a cut, slit or hole formed in the multi-layer film article.

9. The method of claim 1 , further comprising applying a second sealant composition to the edge-sealed article, the second sealant composition comprising
at least one solvent; and
at least one polymer dissolved in the solvent; and
permitting the solvent of the second sealant composition to dry.

Assignees

• 3M Innovative Properties Co

Inventors

• Katare Rajesh K
• Peterson Eric M
• Schmidt Sierra V

Classifications

• F24S23/82

  characterised by the material or the construction of the reflector · CPC title

• Y10T428/24777

  Edge feature · CPC title

• B32B2327/12

  containing fluorine · CPC title

• B32B37/0076

  characterised in that the layers are not bonded on the totality of their surfaces · CPC title

• G02B5/0808 Primary

  having a single reflecting layer (G02B5/0883, G02B5/0891 take precedence) · CPC title