Solar energy shielding window film laminates
First Claim
1. A solar energy shielding window film laminate exhibiting visual light transmittance in the range of 5 to 80%, which comprises:
- at least two polyester films; and
at least one layer of adhesive contained between the polyester films, wherein the at least one adhesive layer comprises a polyurethane base laminating adhesive having solar-energy-screen particles dispersed therein, wherein the solar-energy-screen particles comprise;
complex metal oxides, wherein combinations of main metals in the complex metal oxides are selected from the group of Cu—
Cr, Cu—
Fe—
Mn, Cu—
Mn, Cu—
Cr—
Mn, Cu—
Cr—
Mn—
Ni, Co—
Cr—
Fe and combinations thereof; and
one or more hexaborides.
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Accused Products
Abstract
The invention relates to solar energy shielding window film laminates exhibiting visual light transmittance in the range of 5 to 80% with minimum progressive fading or degradation of reflective quality wherein base polyester films have a layer of adhesive sandwiched there between, the adhesive layer containing dispersed mixed metal oxides as solar-energy-screen particles optionally in combination with rare earth hexaborides, antimony containing metal oxide, indium containing metal oxide, titanium nitride, or carbon particles either singly or in combinations thereof. The process for preparation of these laminates involves steps of selecting a polyester (PET) substrate; coating it with an adhesive formulation containing the dispersed mixed metal oxides as solar-energy-screen particles and other additives followed by lamination with a second PET film; applying a UV hard coat layer on one side of the PET film laminate and applying pressure sensitive adhesive on a side opposite the UV hard coat layer of the laminate followed by lamination with a release sheet.
52 Citations
32 Claims
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1. A solar energy shielding window film laminate exhibiting visual light transmittance in the range of 5 to 80%, which comprises:
- at least two polyester films; and
at least one layer of adhesive contained between the polyester films, wherein the at least one adhesive layer comprises a polyurethane base laminating adhesive having solar-energy-screen particles dispersed therein, wherein the solar-energy-screen particles comprise;
complex metal oxides, wherein combinations of main metals in the complex metal oxides are selected from the group of Cu—
Cr, Cu—
Fe—
Mn, Cu—
Mn, Cu—
Cr—
Mn, Cu—
Cr—
Mn—
Ni, Co—
Cr—
Fe and combinations thereof; and
one or more hexaborides. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
- at least two polyester films; and
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28. A solar energy shielding window film laminate, which comprises:
- at least two polyester films; and
at least one layer of adhesive contained between the polyester films, wherein the at least one adhesive layer comprises a polyurethane base laminating adhesive having solar-energy-screen particles dispersed therein, wherein the solar-energy-screen particles comprise complex metal oxides, wherein combinations of main metals in the complex metal oxides are selected from the group of Cu—
Cr, Cu—
Fe—
Mn, Cu—
Mn, Cu—
Cr—
Mn, Cu—
Cr—
Mn—
Ni, Co—
Cr—
Fe and combinations thereof, and one or more hexaborides,wherein the at least one adhesive layer is prepared from an adhesive formulation consisting essentially of;
the polyurethane laminating adhesive;
the solar-energy-screen particles; and
from about 10 to about 90% by weight, based on the total dry weight of the laminating adhesive and solar-energy-screen particles, of one or more organic solvents.
- at least two polyester films; and
-
29. A solar energy shielding window film laminate, which comprises:
- at least two polyester films; and
at least one layer of adhesive contained between the polyester films, wherein the at least one adhesive layer comprises a polyurethane base laminating adhesive having solar-energy-screen particles dispersed therein, wherein the solar-energy-screen particles consist essentially of complex metal oxides, wherein combinations of main metals in the complex metal oxides are selected from the group of Cu—
Cr, Cu—
Fe—
Mn, Cu—
Mn, Cu—
Cr—
Mn, Cu—
Cr—
Mn—
Ni, Co—
Cr—
Fe and combinations thereof, and one or more hexaborides. - View Dependent Claims (30, 31, 32)
- at least two polyester films; and
Specification