Method for adhering cured silicones to low energy plastics and composite prepared by the method
AssigneeDow Silicones Corporation
InventorBizhong Zhu
Life of this patent
Estimating the term…
Abstract
A primer is useful for adhering cured silicones to low energy plastic substrates. The primer is prepared from starting materials including a) an organoboron compound capable of forming a free radical generating species, and at least one of b) an organosilicon compound having, per molecule, at least one free radical reactive group and at least one other reactive group, and/or c) an organoborane liberating compound capable of reacting with starting material a) to liberate the free radical generating species. The method for forming the primer may further include use of d) an organic solvent, and e) a free radical polymerizable monomer, oligomer, macromonomer, or polymer.
Claims18
A method for adhering a cured silicone to a substrate, where the method comprises:
- 1) applying a primer composition to a surface of a substrate, where the primer composition comprises
- a) an organoboron compound capable of forming a free radical generating species, and
- 2) contacting a curable silicone composition with the surface of the substrate, where the primer composition and/or the curable silicone composition further comprise at least one of
- b) an organosilicon compound having, per molecule, at least one free radical reactive group and at least one other reactive group, and/or
- c) an organoborane liberating compound capable of reacting with starting material a) to liberate the free radical generating species, with the proviso that starting material c) is used in the method when either starting material b) is absent or starting material b) does not contain a group capable of reacting with starting material a) to liberate the free radical generating species.
A method for preparing a composite comprising:
- 1) applying a primer composition to a surface of a substrate, where the primer composition comprises
- a) an organoboron compound capable of forming a free radical generating species, and
- 2) contacting a curable silicone composition with the surface of the substrate, where the primer composition and/or the curable silicone composition further comprise at least one of
- b) an organosilicon compound having, per molecule, at least one free radical reactive group and at least one other reactive group, and/or
- c) an organoborane liberating compound capable of reacting with starting material a) to liberate the free radical generating species, with the proviso that starting material c) is used in the method when either starting material b) is absent or starting material b) does not contain a group capable of reacting with starting material a) to liberate the free radical generating species,
- 3) curing the curable silicone composition to form a cured silicone;
- wherein the composite further comprises
- a second substrate having a second surface adhered to the cured silicone opposite the surface of the substrate;
- and
- optionally a second primer on the second surface of the second substrate contacting the cured silicone.
Dependencies are inferred from the claim text.