Polyacrylate compositions

1. An uncured gasket composition curable at room temperature on a first sealing surface, comprising:

(a) a (meth)acrylate component comprising a silyl-functionalized poly(acrylate) having the structure,

wherein each R 1 is independently selected from a C 1 to C 6 alkyl, each R 2 is independently selected from a C 1 to C 10 alkyl, a is integer from 0-3, q is an integer from 2 to about 1,000, and A is a hydrocarbon diradical containing at least one (meth)acrylate linkage;

(b) at least one of a phenylene diamine within structure I or a diphenyl amine within structure II, wherein structure I comprises:

wherein R and R 1 are each members individually selected from the group consisting of C 1-12 alkyl, C 2-12 alkenyl, C 3-12 cyclo or bicycloalkyl, C 6-18 aryl, and derivatives thereof, and x and y are each individually 0-2;

structure II comprises:

wherein R 2 and R 3 are each members individually selected from the group consisting of C 1-12 alkyl, C 2-12 alkenyl, C 3-12 cyclo or bicycloalkyl, C 6-18 aryl, and derivatives thereof, and n and m are each individually 0-5; and combinations thereof; and

(c) at least one component which reduces shrinkage of the cured composition upon exposure of the cured composition to a hydrocarbon fluid, wherein the component is present in an amount sufficient to reduce shrinkage of the cured composition when exposed to a hydrocarbon fluid.

2. The composition according to claim 1 , wherein the phenylene diamine is represented by a member selected from the group consisting of:

(R is 1,3-dimethylbutyl or 4-dimethylpentyl);

3. The composition according to claim 1 , wherein the diphenyl amine is represented by a member selected from the group consisting of:

4. Reaction products of the composition according to claim 1 .

5. The composition of claim 1 , wherein the component which reduces shrinkage is a polyolefin added to the composition in particulate form.

6. The composition of claim 5 , wherein the polyolefin is substantially dissolved in the composition.

7. The composition of claim 5 , wherein the polyolefin in particulate form is comprised of a polyolefin containing repeating units of at least one C 2 to C 7 alkene monomer.

8. The composition of claim 1 , wherein the component which reduces shrinkage is present in an amount of about 1% to about 20% by weight of the composition.

9. The composition of claim 5 , wherein the component which reduces shrinkage has an average particle size of about 0.1 to about 50 microns.

10. The composition of claim 1 , further comprising a moisture-cure catalyst or an amine-based catalyst.

11. The composition of claim 5 , wherein the hydrocarbon fluid-absorbing component which reduces shrinkage is polyethylene in particulate form.

12. The composition according to claim 1 , comprising both of a phenylene diamine within structure I and a diphenyl amine within structure II.

13. A gasket formed by the cured reaction products of the composition of claim 1 sealingly engaged between the first sealing surface and a second sealing surface.

14. A method of making an automotive engine gasket comprising:

providing a first surface designed to be sealed to a mating surface;

disposing the composition of claim 1 on the first surface;

moving one of the sealing surfaces adjacent the other sealing surface so that the composition is disposed between the sealing surfaces; and

curing the composition;

wherein reaction products of the composition form a seal between the sealing surfaces.

15. The method of claim 14 wherein the step of disposing comprises disposing composition around a periphery of the first sealing surface.

16. The method of claim 14 wherein the step of disposing comprises disposing composition around a periphery of the first sealing surface and subsequently contacting the disposed composition to the mating sealing surface before curing.

17. A motorized vehicle component, comprising:

a first portion having a first predefined sealing surface fluidly connected to an internal chamber;

a second portion having a second predefined sealing surface adjacent the first sealing surface and fluidly connected to the chamber; and

a cured reaction product of a curable gasket composition disposed between the first and second sealing surfaces and in contact with the chamber to seal the chamber, the curable gasket composition comprising,

(a) a (meth)acrylate component comprising a silyl-functionalized poly(acrylate) having the structure,

wherein each R 1 is independently selected from a C 1 to C 6 alkyl, each R 2 is independently selected from a C 1 to C 10 alkyl, a is integer from 0-3, q is an integer from 2 to about 1,000, and A is a hydrocarbon diradical containing at least one (meth)acrylate linkage; and

(b) at least one of a phenylene diamine within structure I or a diphenyl amine within structure II, wherein structure I comprises:

wherein R and R 1 are each members individually selected from the group consisting of C 1-12 alkyl, C 2-12 alkenyl, C 3-12 cyclo or bicycloalkyl, C 6-18 aryl, and derivatives thereof, and x and y are each individually 0-2;

structure II comprises:

wherein R 2 and R 3 are each members individually selected from the group consisting of C 1-12 alkyl, C 2-12 alkenyl, C 3-12 cyclo or bicycloalkyl, C 6-18 aryl, and derivatives thereof, and n and m are each individually 0-5; and combinations thereof; and

(c) at least one component which reduces shrinkage of the cured composition upon exposure of the cured composition to a hydrocarbon fluid, wherein the component is present in an amount sufficient to reduce shrinkage of the cured composition when exposed to a hydrocarbon fluid.

18. The component of claim 17 wherein the phenylene diamine represented by a member selected from the group consisting of:

(R is 1,3-dimethylbutyl or 4-dimethylpentyl);

and wherein the component which reduces shrinkage is a polyolefin.