Laminated structures using UV-curable adhesion promoters
View Patent ↗An adhesion promoter for enhancing the bond between adjacent layers of a multilayer structure to prevent delamination thereof is disclosed. The adhesion promoter comprises an aromatic polyimide-based UV-cured acrylate. Also disclosed are laminated structures including liquid crystal displays and bonded missile domes that utilize an adhesion promoter of the invention, and methods for fabricating such structures.
1. A liquid crystal display comprising a pair of optically transparent substrates defining a liquid crystal cell, each substrate of the pair of substrates having an outer surface carrying:
a pressure sensitive adhesive layer;
an adhesion promoter layer comprising as constituencies:
(a) an aromatic polyimide; and
(b) a UV-cured resin,
wherein the percentages by weight of the constituents (a) and (b) are effective to enhance the bond between adjacent layers of a laminated structure; and
an optical layer,
wherein
the adhesion promoter layer is interposed between and joining the adhesive layer and the outer surface of the substrate,
the pressure sensitive adhesive layer is interposed between and joining the adhesion promoter layer and the optical layer, and
the adhesion promoter layer is effective to enhance the bond between adjacent layers of a laminated structure.
2. The display of claim 1 , wherein the relative proportions, by weight, of the constituents (a) and (b) are from 20% to 60% of (a), and from 40% to 80% of (b) for a total of 100 parts of (a) and (b).
3. The display of claim 1 , wherein the relative proportions, by weight, of the constituents (a) and (b) are from 30% to 50% of (a), and from 50% to 70% of (b) for a total of 100 parts of (a) and (b).
4. The display of claim 1 , wherein the relative proportions, by weight, of the constituents (a) and (b) are from 35% to 45% of (a), and from 55% to 65% of (b) for a total of 100 parts of (a) and (b).
5. The display of claim 1 , wherein the optical layer comprises a compensator.
6. The display of claim 1 , wherein the optical layer comprises a polarizer.
7. The display of claim 1 , wherein the adhesion promoter layer has a thickness in the range of 0.05 to 0.15 μm.