Method for forming a laminated window that can exhibit a variable level of adhesion
View Patent ↗A method for forming a laminated window having one or more interlayers that can exhibit a variable level of adhesion is disclosed. The method includes: a) assembling a cast between two plies that make up the laminated window; b) filling the cast with a reaction mixture for forming a polymer material; c) adding at least one first silane comprising an isocyanate functional silane and at least one second silane comprising an epoxy silane to the reaction mixture; and d) curing the reaction mixture.
1. A method for improving the adhesion performance exhibited by a laminated window having an interlayer comprising:
a) assembling a cast between two plies that make up the laminated window;
b) filling the cast with a reaction mixture for forming a polymer material;
c) adding at least one first silane comprising an isocyanate functional silane and at least one second silane comprising an epoxy silane to the reaction mixture; and
d) curing the reaction mixture,
wherein the method is a non-extrusion method.
2. The method according to claim 1 , wherein the first silane is added to the reaction mixture in an amount ranging from 0.01 to 0.05 wt. %.
3. The method according to claim 1 , wherein the second silane is added to the reaction mixture in an amount up to 0.1 wt. %.
4. The method according to claim 1 , further comprising adding an abhesion agent to the reaction mixture.
5. The method according to claim 4 , wherein the abhesion agent is stearyl acid phosphate containing 3 stearyl (C 18 ) groups bonded to a phosphorus atom.
6. The method according to claim 4 , wherein the abhesion agent is added in an amount up to 0.1 wt. % of the reaction mixture.
7. The method according to claim 1 , wherein the curing is accomplished by thermal curing, curing using ultraviolet (UV) light, or a combination of thermal and UV curing.
8. A laminated window comprising:
A first transparent ply and a second transparent ply; and
One or more interlayers sandwiched between the two plies, wherein the interlayer(s) is formed from a reaction mixture comprising at least one first silane comprising an isocyanate functional silane and at least one second silane comprising an epoxy silane via a non-extrusion process.
9. The laminated window according to claim 8 , wherein the plies comprise glass, plastic, or both.
10. The laminated window according to claim 8 , wherein the first silane is present in the reaction mixture in an amount ranging from 0.01 to 0.05 wt. %.
11. The laminated window according to claim 8 , wherein the second silane is present in the reaction mixture in an amount up to 0.1 wt. %.
12. The laminated window according to claim 8 , wherein the visible light transmittance exhibited ranges from 70% to 90% and the haze exhibited is no greater than 0.5% haze.
13. The laminated window according to claim 8 , wherein the degree of adhesion exhibited by the laminated window ranges from 1 pound to 10 pounds per lineal inch (1.75×10 2 N/m to 1.75×10 3 N/m) as determined by a 90° Peel Test according to NASA TECH BRIEF 65-10173.
14. The laminated window according to claim 8 , wherein the degree of adhesion as determined by NASA TECH BRIEF 65-10173 remains within the 1 pound to 10 pounds per lineal inch (1.75×10 2 N/m to 1.75×10 3 N/m) after exposure to temperatures ranging from −50° F. to 120° F. (−46° C. to 49° C.) and relative humidities ranging from 0 to 100 percent for at least 5 days.
15. The laminated window according to claim 7 , wherein the laminated window is used as an automotive windshield, an automotive sidelight, an aircraft window, a storefront display window, or a sky light.