Coextruded weatherable film structures and laminates
First Claim
1. A coextruded multilayer weatherable film product adapted to be adhered as a weatherable surface coating onto a substrate in a separate process operation, comprising:
- at least a first thermoplastic surface layer of a weatherable polymer comprising (a) AES, ASA, SAN or mixtures thereof or (b) any of the polymers of (a) blended with PVC, CPE, aliphatic polyurethanes or saturated styrenic block copolymers;
said first layer having a 1% secant modulus of greater than about 100,000 psi and said first layer having a thickness of about 20 mils or less; and
at least a second thermoplastic layer underlying the weatherable layer, said second layer being adjacent to and adhered to said first layer and said second layer adapted to be adhered to the substrate in a subsequent operation;
said second layer having a 1% secant modulus of less than about 200,000 psi and said second layer having a thickness of about 20 mils or less;
wherein the total thickness of the coextruded weatherable film is less than 25 mils.
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Accused Products
Abstract
A coextruded weatherable film for lamination to an underlying nonweatherable substrate, including, for example, a two-layer film structure including an outer layer of a weatherable polymer that provides weather resistance such as ethylene/propylene/nonconjugated diene-reinforced styrene/acrylonitrile copolymer (AES) or butyl acrylate-reinforced styrene/acrylonitrile copolymer (ASA), coextruded over a thermoplastic underlying layer, for example, of a carbon black pigmented, UV stabilized polymer such as chlorinated polyethylene that provides UV protection for an underlying substrate such as vinyl siding or polymer layers.
132 Citations
12 Claims
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1. A coextruded multilayer weatherable film product adapted to be adhered as a weatherable surface coating onto a substrate in a separate process operation, comprising:
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at least a first thermoplastic surface layer of a weatherable polymer comprising (a) AES, ASA, SAN or mixtures thereof or (b) any of the polymers of (a) blended with PVC, CPE, aliphatic polyurethanes or saturated styrenic block copolymers;
said first layer having a 1% secant modulus of greater than about 100,000 psi and said first layer having a thickness of about 20 mils or less; andat least a second thermoplastic layer underlying the weatherable layer, said second layer being adjacent to and adhered to said first layer and said second layer adapted to be adhered to the substrate in a subsequent operation;
said second layer having a 1% secant modulus of less than about 200,000 psi and said second layer having a thickness of about 20 mils or less;
wherein the total thickness of the coextruded weatherable film is less than 25 mils. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A process for producing a coextruded multilayer film product adapted to be adhered as a weatherable surface coating onto a substrate in a separate process operation, comprising:
coextruding at least a first thermoplastic surface layer of a weatherable polymer with at least a first underlying layer adjacent to the weatherable polymer layer, said first surface layer comprising (a) AES, ASA, SAN or mixtures thereof of (b) any of the polymers of (a) blended with PVC, CPE, aliphatic polyurethanes or saturated styrenic block copolymers, said first surface layer having a 1% secant modulus of greater than about 100,000 psi, said first surface layer having a thickness of about 20 mils or less, said first underlying layer intimately adherable to and compatible with the weatherable polymer layer, said first underlying layer having a 1% secant modulus of less than about 200,000 psi, said first underlying layer having a thickness of about 20 mils or less; and
said first underlying layer adapted to be intimately adherable to and compatible with a substrate.
Specification