Universal primer compositions and methods
First Claim
1. A composition comprising a product of a reaction of i) an additive that includes the reaction product of a) a first reaction product of at least one isocyanate including a thiophosphate and a silane selected from an amino-least one isocyanate including a thiophosphate and a silane selected from an amino-silane, a mercapto-silane, or a combination thereof;
- and b) a second reaction product that is an isocyanate functional prepolymer with an isocyanate content greater than about 1%, which is a reaction product of a polyol having a functionality of greater than about 2 and a molecular weight (Mn) greater than about 300 and an aromatic isocyanate wherein the polyol consists essentially of polyether polyols, polyester polyols, poly(alkylene carbonate)polyols, hydroxyl-containing polythioethers, polymer polyols, and mixtures thereof; and
ii) with at least one base primer composition that includes a prepolymer derived from the reaction of at least one aliphatic polyisocyanate and a polyol, and is at least partially reacted with an amino group of an aminosilane, wherein the aminosilane includes a plurality of alkoxy groups bound to silicon.
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Accused Products
Abstract
A composition for and method for bonding a substrate. In general, applied to a substrate will be a primer composition that includes an adhesion promoter, which is an adduct prepared by the reaction of at least one aromatic polyisocyanate compound, with an active hydrogen containing moiety of an organofunctional silane, and a prepolymer derived from the reaction of at least one aliphatic polyisocyanate and a polyol, and is at least partially reacted with an active hydrogen containing moiety of an organofunctional silane.
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Citations
17 Claims
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1. A composition comprising a product of a reaction of i) an additive that includes the reaction product of a) a first reaction product of at least one isocyanate including a thiophosphate and a silane selected from an amino-least one isocyanate including a thiophosphate and a silane selected from an amino-silane, a mercapto-silane, or a combination thereof;
- and b) a second reaction product that is an isocyanate functional prepolymer with an isocyanate content greater than about 1%, which is a reaction product of a polyol having a functionality of greater than about 2 and a molecular weight (Mn) greater than about 300 and an aromatic isocyanate wherein the polyol consists essentially of polyether polyols, polyester polyols, poly(alkylene carbonate)polyols, hydroxyl-containing polythioethers, polymer polyols, and mixtures thereof; and
ii) with at least one base primer composition that includes a prepolymer derived from the reaction of at least one aliphatic polyisocyanate and a polyol, and is at least partially reacted with an amino group of an aminosilane, wherein the aminosilane includes a plurality of alkoxy groups bound to silicon. - View Dependent Claims (2, 3, 4)
- and b) a second reaction product that is an isocyanate functional prepolymer with an isocyanate content greater than about 1%, which is a reaction product of a polyol having a functionality of greater than about 2 and a molecular weight (Mn) greater than about 300 and an aromatic isocyanate wherein the polyol consists essentially of polyether polyols, polyester polyols, poly(alkylene carbonate)polyols, hydroxyl-containing polythioethers, polymer polyols, and mixtures thereof; and
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5. A kit comprising a primer composition and at least one adhesive wherein the primer composition comprises
i. an adhesion promoter, which is an adduct prepared by the reaction of at least one aromatic polyisocyanate compound, with an active hydrogen containing moiety of an organofunctional silane, ii. a prepolymer derived from the reaction of at least one aliphatic polyisocyanate and a polyol, and is at least partially reacted with an active hydrogen containing moiety of an organofunctional silane; -
iii. optionally, a solvent; and iv. an isocyanate functional prepolymer with an isocyanate content greater than about 1%, and being the reaction product of a polyol and an aromatic polyisocyanate wherein the polyol has a functionality of greater than about 2 and a molecular weight (Mn) greater than about 300 and consists essentially of polyether polyols, polyester polyols, poly(alkylene carbonate)polyols, hydroxyl-containing polythioethers, polymer polyols, and mixtures thereof. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13)
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14. An additive for a primer composition comprising i) an adhesion promoter comprising a first reaction product of 1 mole of at least one isocyanate including a trifunctional, tris(p-isocyanato-phenyl)-thiophosphate and with about 2.3 to about 3.0 moles of a silane selected from an amino-silane, a mercapto-silane, or a combination thereof;
- and ii) a second reaction product that is an isocyanate functional prepolymer with an isocyanate content greater than about 1% generally formed by the reaction of a polyol having a functionality of greater than about 2 and a molecular weight (Mn) greater than about 300 and an aromatic isocyanate wherein the polyol consists essentially of polyether polyols, polyester polyols, poly(alkylene carbonate)polyols, hydroxyl-containing polythioethers, polymer polyols, and mixtures thereof;
wherein the weight ratio of adhesion promoter to isocyanate functional prepolymer with an isocyanate content of greater than about 1 percent is about 1;
140 to 1;
1. - View Dependent Claims (15)
- and ii) a second reaction product that is an isocyanate functional prepolymer with an isocyanate content greater than about 1% generally formed by the reaction of a polyol having a functionality of greater than about 2 and a molecular weight (Mn) greater than about 300 and an aromatic isocyanate wherein the polyol consists essentially of polyether polyols, polyester polyols, poly(alkylene carbonate)polyols, hydroxyl-containing polythioethers, polymer polyols, and mixtures thereof;
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16. A method of improving the performance of a primer composition, comprising the step of mixing an additive in an amount of about 1 to about 20 parts by weight to about 99 to about 80 parts by weight of the primer composition, wherein the additive includes the reaction product of i) a first reaction product of at least one isocyanate including a thiophosphate and a silane selected from an amino-silane, a mercapto-silane, or a combination thereof;
- and ii) a second reaction product that is an isocyanate functional prepolymer with an isocyanate content greater than about 1% generally formed by the reaction of a polyol having a functionality of greater than about 2 and a molecular weight (Mn) greater than about 300, and an aromatic isocyanate, wherein the polyol consists essentially of polyether polyols, polyester polyols, poly(alkylene carbonate)polyols, hydroxyl-containing polythioethers, polymer polyols, and mixtures thereof;
with a base primer composition to form a resulting primer composition; and
contacting a substrate selected from glass, metal, plastic, a coated substrate, or any combination thereof, with the resulting primer composition. - View Dependent Claims (17)
- and ii) a second reaction product that is an isocyanate functional prepolymer with an isocyanate content greater than about 1% generally formed by the reaction of a polyol having a functionality of greater than about 2 and a molecular weight (Mn) greater than about 300, and an aromatic isocyanate, wherein the polyol consists essentially of polyether polyols, polyester polyols, poly(alkylene carbonate)polyols, hydroxyl-containing polythioethers, polymer polyols, and mixtures thereof;
Specification