What I claim is:
1. A method of preparing a polymerizate from a reactant monomer or prepolymer which undergoes shrinkage during the formation of said polymerizate which comprise reacting said reactant monomer or prepolymer in the presence of a monomer selected from the group consisting of: @@STR14@@ wherein R.sub.1 represents a C.sub.1 -C.sub.6 alkenyl, R.sub.2 represents C.sub.1 -C.sub.6 alkenyl, R.sub.3 represents a C.sub.1 -C.sub.6 alkyl or C.sub.3 -C.sub.8 cycloaliphatic unsubstituted, or substituted with halo, C.sub.1 -C.sub.6 alkyl, alkoxy, hydroxy, or one of one or more hetero atoms; R.sub.4 represents a C.sub.1 -C.sub.6 alkyl or C.sub.3 -C.sub.8 cycloaliphatic unsubstituted, or substituted with halo, C.sub.1 -C.sub.6 alkyl, alkoxy, hydroxy, or one of one or more hetero atoms; R.sub.5 is a C.sub.1 -C.sub.6 alkenyl; R.sub.6 represents C.sub.1 -C.sub.6 alkenyl; R.sub.7 is a C.sub.1 -C.sub.6 alkenyl or C.sub.3 -C.sub.8 cycloaliphatic unsubstituted, or substituted with halo, C.sub.1 -C.sub.6 alkyl, alkoxy, hydroxy, or one of one or more hetero atoms; or aryl; and R.sub.8 is hydrogen or C.sub.1 -C.sub.6 alkyl or a C.sub.3 -C.sub.8 cycloaliphatic unsubstituted, or substituted with halo, C.sub.1 -C.sub.6 alkyl, alkoxy, hydroxy, or one of one or more hetero atoms; or aryl to form a polymerizate containing said reactant and said monomer as chemically contained constituents thereof.
2. The process of claim 1, wherein the polymerizate of the admixture containing said reactant and said monomer undergoes substantially no shrinkage or positive expansion during the formation of said polymerizate.
3. The process of claim 2, wherein tile reactant monomer or prepolymer comprises an ethoxylated bisphenol of dimethacrylate.
4. The process of claim 2, wherein the reacting step is carried out in the presence of a photo-initiator.
5. The process of claim 4, wherein the photo-initiator is sensitive to visible light.
6. A resinous composition comprising the monomer of formula I @@STR15@@ wherein R.sub.1 represents a C.sub.1 -C.sub.6 alkenyl, R.sub.2 represents C.sub.1 -C.sub.6 alkenyl, R.sub.3 represents a C.sub.1 -C.sub.6 alkyl or C.sub.3 -C.sub.8 cycloaliphatic unsubstituted, or substituted with halo, C.sub.1 -C.sub.6 alkyl, alkoxy, hydroxy, or one of one or more hetero atoms; and R.sub.4 represents a C.sub.1 -C.sub.6 alkyl or C.sub.3 -C.sub.8 cycloaliphatic unsubstituted, or substituted with halo, C.sub.1 -C.sub.6 alkyl, alkoxy, hydroxy, or one of one or more hetero atoms and a compound selected from the group consisting of thermoplastic and thermosetting monomer compounds.
7. A composite comprising a polymerized composition of claim 6 and a substrate.
8. A shaped composite comprising a polymerized composition of claim 6.
9. The composite of claim 7, wherein the substrate is embedded within the polymerized composition.
10. The composite of claim 7, wherein the substrate has coated thereon the polymerized composition.
11. The composite of claim 7, wherein there is more than one substrate and the polymerized composite extends between said substrate.
12. Polymers polymerized from the monomers of formula (I): @@STR16@@ wherein R.sub.1 represents a C.sub.1 -C.sub.6 alkenyl, R.sub.2 represents C.sub.1 -C.sub.6 alkenyl, R.sub.3 represents a C.sub.1 -C.sub.6 alkyl or C.sub.3 -C.sub.8 cycloaliphatic unsubstituted, or substituted with halo, C.sub.1 -C.sub.6 alkyl, alkoxy, hydroxy, or one of one or more hetero atoms; and R.sub.4 represents a C.sub.1 -C.sub.6 alkyl or C.sub.3 -C.sub.8 cycloaliphatic unsubstituted, or substituted with halo, C.sub.1 -C.sub.6 alkyl, alkoxy, hydroxy, or one of one or more hetero atoms.
13. Polymers polymerized from the monomers of formula II @@STR17@@ wherein R.sub.5 is a C.sub.1 -C.sub.6 alkenyl; R.sub.6 represents C.sub.1 -C.sub.6 alkenyl; R.sub.7 is a C.sub.1 -C.sub.6 alkenyl or C.sub.3 -C.sub.8 cycloaliphatic unsubstituted, or substituted with halo, C.sub.1 -C.sub.6 alkyl, alkoxy, hydroxy, or one of one or more hetero atoms; or aryl; and R.sub.8 is hydrogen or C.sub.1 -C.sub.6 alkyl or a C.sub.3 -C.sub.8 cycloaliphatic unsubstituted, or substituted with halo, C.sub.1 -C.sub.6 alkyl, alkoxy, hydroxy, or one of one or more hetero atoms; or aryl.