METHODS FOR IMPROVING BOND BETWEEN POLYMERIC WINDSHIELD GASKET AND ADHESIVE
Disclosed herein are embodiments of a windshield assembly and methods for mounting a windshield to a vehicle frame. An exemplary method for mounting a windshield to a vehicle frame comprise treating a surface of a polymeric gasket with fluoro-oxidation, positioning the gasket on the windshield, treating the surface of the gasket with a liquid composition comprising one or more reactive adhesion promoters, applying a polyurethane-based adhesive to the treated surface of the gasket; and positioning the windshield and gasket against a mounting surface of the vehicle frame such that the adhesive adheres the treated surface of the gasket to the mounting surface.
1 . A windshield assembly for a land vehicle, comprising:
a windshield window frame;
a windshield having a periphery;
a gasket comprising a polymeric material and sized to engage the periphery of the windshield, the gasket having a fluoro-oxidized outer surface to which a primer is applied; and
an adhesive positioned to hold the outer surface of the gasket to the windshield window frame.
2 . The windshield assembly of claim 1 , wherein the gasket comprises rubber.
3 . The windshield assembly of claim 1 , wherein the adhesive is polyurethane-based.
4 . The windshield assembly of claim 1 , wherein the primer includes a silane.
5 . The windshield assembly of claim 1 wherein the primer comprises a liquid composition comprising one or more adhesion promoters.
6 . The windshield assembly of claim 1 , wherein:
the gasket comprises EPDM rubber;
the primer comprises a liquid composition comprising one or more alcohols and one or more aliphatic compounds; and
the adhesive is polyurethane based and comprises at least one urethane prepolymer, the at least one urethane prepolymer comprising one or more polyisocyanates, one or more polyetherpolyols or one or more polyesterpolyols.
7 . The windshield assembly of claim 6 , wherein the at least one urethane prepolymer comprises one or more polyisocyanates.
8 . The windshield assembly of claim 6 , wherein the at least one urethane prepolymer comprises one or more polyetherpolyols.
9 . The windshield assembly of claim 6 , wherein the at least one urethane prepolymer comprises one or more polyesterpolyols.
10 . The windshield assembly of claim 1 , wherein the adhesive comprises a polyurethane that includes a polyisocyanate, and the primer comprises one or more alcohols and one or more aliphatic compounds.
11 . The windshield assembly of claim 1 , wherein the primer comprises one or more adhesion promoters.
12 . A windshield assembly for a land vehicle, comprising:
a windshield window frame;
a windshield having a periphery;
a gasket comprising a polymeric material and sized to engage the periphery of the windshield, the gasket having a fluoro-oxidized outer surface; and
an adhesive positioned to hold the outer surface of the gasket to the windshield window frame.
13 . A method for mounting a windshield to a vehicle frame, the method comprising:
treating a surface of a polymeric gasket with fluoro-oxidation;
positioning the gasket on the windshield;
applying a polyurethane-based adhesive to the treated surface of the gasket; and
positioning the windshield and gasket against a mounting surface of the vehicle frame such that the adhesive adheres the treated surface of the gasket to the mounting surface.
14 . The method of claim 13 , further comprising treating the gasket surface with a primer composition.
15 . The method of claim 13 , wherein the adhesive is polyurethane-based.
16 . The method of claim 14 , wherein the primer includes a silane.
17 . The method of claim 14 , wherein the primer comprises a liquid composition comprising one or more adhesion promoters.
18 . The method of claim 13 , wherein the polymeric gasket comprises EPDM rubber.
19 . The method of claim 14 , wherein:
the primer comprises a liquid composition comprising one or more alcohols and one or more aliphatic compounds; and
the adhesive is polyurethane based and comprises at least one urethane prepolymer, the at least one urethane prepolymer comprising one or more polyisocyanates, one or more polyetherpolyols or one or more polyesterpolyols.