High impact strength 3D printing materials derived from polycycloolefin monomers and crosslinkers

1. A composition comprising:

a) one or more monomers of formula (I):

wherein:

m is an integer 0, 1 or 2;

is a single bond or a double bond;

R 1 , R 2 , R 3 and R 4 are the same or different and each independently selected from the group consisting of hydrogen, halogen, methyl, ethyl, linear or branched (C 3 -C 16 )alkyl, (C 2 -C 16 )alkenyl, perfluoro(C 1 -C 12 )alkyl, (C 3 -C 12 )cycloalkyl, (C 6 -C 12 )bicycloalkyl, (C 7 -C 14 )tricycloalkyl, methoxy, ethoxy, linear or branched (C 3 -C 16 )alkoxy, (C 2 -C 6 )acyl, (C 2 -C 6 )acyloxy, (C 6 -C 14 )aryl, (C 6 -C 14 )aryl(C 1 -C 6 )alkyl, perfluoro(C 6 -C 14 )aryl, perfluoro(C 6 -C 14 )aryl(C 1 -C 3 )alkyl, (C 6 -C 14 )aryloxy, (C 6 -C 14 )aryl(C 1 -C 6 )alkoxy, tri(C 1 -C 6 )alkoxysilyl and a group of formula (A):

—Z-Aryl  (A)

wherein:

Z is a bond or a group selected from the group consisting of:

(CR 5 R 6 ) a , O(CR 5 R 6 ) a , (CR 5 R 6 ) a O, (CR 5 R 6 ) a —O—(CR 5 R 6 ) b , (CR 5 R 6 ) a —O—(SiR 5 R 6 ) b , (CR 5 R 6 ) a —(CO)O—(CR 5 R 6 ) b , (CR 5 R 6 ) a —O(CO)—(CR 5 R 6 ) b , (CR 5 R 6 ) a —(CO)—(CR 5 R 6 ) b , where a and b are integers which may be the same or different and each independently is 1 to 12;

R 5 and R 6 are the same or different and each independently selected from the group consisting of hydrogen, methyl, ethyl, linear or branched (C 3 -C 6 )alkyl, methoxy, ethoxy, linear or branched (C 3 -C 6 )alkyloxy, (C 2 -C 6 )acyl, (C 2 -C 6 )acyloxy, phenyl and phenoxy;

Aryl is phenyl or phenyl substituted with one or more of groups selected from the group consisting of methyl, ethyl, linear or branched (C 3 -C 6 )alkyl, hydroxy, methoxy, ethoxy, linear or branched (C 3 -C 6 )alkyloxy, (C 2 -C 6 )acyl, (C 2 -C 6 )acyloxy, phenyl and phenoxy; or

one of R 1 or R 2 taken together with one of R 3 or R 4 and the carbon atoms to which they are attached to form a (C 5 -C 7 )carbocyclic ring optionally containing one or more double bonds;

b) one or more compounds selected from the group consisting of:

1,3-bis(2-(bicyclo[2.2.1]hept-5-en-2-yl)ethyl)-1,1,3,3-tetramethyldisiloxane (BisENBTMDS);

1,5-bis(2-(bicyclo[2.2.1]hept-5-en-2-yl)ethyl)-1,1,3,3,5,5-hexamethyltrisiloxane (BisENBHMTS);

1,4-bis((2-(bicyclo[2.2.1]hept-5-en-2-yl)ethyl)dimethylsilyl)benzene;

3,3′-oxybis(1,5-bis(2-(bicyclo[2.2.1]hept-5-en-2-yl)ethyl)-3-cyclohexyl-1,1,5,5-tetramethyltrisiloxane) (TeTENBOMSS); and

3,7,14-tris(((2-(bicyclo[2.2.1]hept-5-en-2-yl)ethyl)dimethylsilyl)oxy)-1,3,5,7,9,11,14-heptaisobutyl-2,4,6,8,10,12,13,15,16-nonaoxa-1,3,5,7,9,11,14-heptasilatricyclo[7.3.3.15,11]hexadecane (trisnorbornenylisobutyl POSS);

c) an organo-ruthenium compound selected from the group consisting of:

a compound of formula (IIB):

a compound of formula (IIIA):

a compound of formula (IIIB):

a compound of formula (IIIC):

1,3-bis(2,4,6-trimethylphenylimidazolidin-2-ylidene)-(2-oxobenzylidene)-2-(((2,6-diisopropylphenyl-imino)methyl)phenoxy)ruthenium;

wherein:

X is a halogen or an anionic ligand;

Y is selected from the group consisting of O and S;

Y′ is OR 9 SR 9 and —N═CHC(O)O(C 1 -C 6 )alkyl, where R 9 is selected from the group consisting of methyl, ethyl, linear or branched (C 1 -C 6 )alkyl, (C 6 -C 10 )aryl, methoxy, ethoxy, linear or branched (C 1 -C 6 )alkoxy, (C 6 -C 10 )aryloxy, —OCH(CH 3 )C(O)N(CH 3 )(OCH 3 );

L is PR 3 or O═PR 3 , where R is independently selected from the group consisting of isopropyl, sec-butyl, tert-butyl, cyclohexyl, bicyclo(C 5 -C 10 )alkyl, phenyl, benzyl, isopropoxy, sec-butoxy, tert-butoxy, cyclohexyloxy, phenoxy and benzyloxy; or

X and L form a bidentate anionic ligand of the formula X-L;

R 7 is selected from the group consisting of isopropyl, sec-butyl, tert-butyl, substituted or unsubstituted cyclohexyl, substituted or unsubstituted phenyl, substituted or unsubstituted biphenyl and substituted or unsubstituted naphthyl;

R 8 is selected from the group consisting of methyl, ethyl, linear or branched (C 1 -C 6 )alkyl, (C 6 -C 10 )aryl, methoxy, ethoxy, linear or branched (C 1 -C 6 )alkoxy,

(C 6 -C 10 )aryloxy, —NHCO(C 1 -C 6 )alkyl, —NHCO-perfluoro(C 1 -C 6 )alkyl, —SO 2 N((C 1 -C 6 )alkyl) 2 and —NO 2 ;

Ar 1 , Ar 2 Ar 3 and Ar 4 are the same or different and each independently selected from the group consisting of substituted or unsubstituted phenyl, substituted or unsubstituted biphenyl and substituted or unsubstituted naphthyl;

wherein said substituents are selected from the group consisting of methyl, ethyl, iso-propyl, tert-butyl and phenyl; and

d) a compound capable of releasing a Bronsted acid when subjected to photolytic conditions, said compound selected from the group consisting of:

a compound of formula (V):

wherein

Y is halogen; and

R 30 and R 31 are the same or different and independently of each other selected from the group consisting of hydrogen, methyl, ethyl, linear or branched (C 3 -C 12 )alkyl, (C 3 -C 12 )cycloalkyl, (C 6 -C 12 )bicycloalkyl, (C 7 -C 1 a)tricycloalkyl, (C 6 -C 10 )aryl, (C 6 -C 10 )aryl(C 1 -C 3 )alkyl, (C 1 -C 12 )alkoxy, (C 3 -C 12 )cycloalkoxy, (C 6 -C 12 )bicycloalkoxy, (C 7 -C 14 )tricycloalkoxy, (C 6 -C 10 )aryloxy(C 1 -C 3 )alkyl and (C 6 -C 10 )-aryloxy; and

a compound of formula (VI):

wherein

R 32 , R 33 and R 34 are the same or different and independently of each other selected from the group consisting of halogen, methyl, ethyl, linear or branched (C 3 -C 12 )alkyl, trihalomethyl, pentahaloethyl, linear or branched perhalo(C 3 -C 12 )alkyl, (C 6 -C 10 )aryl, (C 6 -C 10 )aryl(C 1 -C 3 )alkyl, perhalo(C 6 -C 10 )aryl, perhalo(C 6 -C 10 )arylperhalo(C 1 -C 3 )alkyl, substituted or unsubstituted five membered or six membered heteroaryl(C 2 -C 4 )alkenyl and substituted or unsubstituted (C 6 -C 10 )aryl(C 2 -C 4 )alkenyl provided that one of R 32 , R 33 and R 34 is trihalomethyl, pentahaloethyl, linear or branched perhalo(C 3 -C 12 )alkyl; and wherein

said composition is in a clear liquid form at room temperature.

2. The composition according to claim 1 , wherein said composition comprising first and second monomer of formula (I) distinct from each other and one of said first and second monomers having a viscosity below 50 centipoise, and wherein said first monomer is completely miscible with said second monomer to form a clear solution.

3. The composition according to claim 1 , wherein said composition comprising a monomer of formula (I) wherein m is 1 and one of R 1 , R 2 , R 3 or R 4 is selected from the group consisting of hexyl, decyl and phenethyl, and remaining R 1 , R 2 , R 3 and R 4 are hydrogen.

4. The composition according to claim 1 , wherein said one or more compounds of d) is selected from the group consisting of:

1,3-bis(2-(bicyclo[2.2.1]hept-5-en-2-yl)ethyl)-1,1,3,3-tetramethyldisiloxane (BisENBTMDS);

1,5-bis(2-(bicyclo[2.2.1]hept-5-en-2-yl)ethyl)-1,1,3,3,5,5-hexamethyltrisiloxane (BisENBHMTS);

3,3′-oxybis(1,5-bis(2-(bicyclo[2.2.1]hept-5-en-2-yl)ethyl)-3-cyclohexyl-1,1,5,5-tetramethyltrisiloxane) (TeTENBOMSS);

and

3,7,14-tris(((2-(bicyclo[2.2.1]hept-5-en-2-yl)ethyl)dimethylsilyl)oxy)-1,3,5,7,9,11,14-heptaisobutyl-2,4,6,8,10,12,13,15,16-nonaoxa-1,3,5,7,9,11,14-heptasilatricyclo[7.3.3.15,11]hexadecane (trisnorbornenylisobutyl POSS).

5. The composition according to claim 1 , wherein the monomer of formula (I) is selected from the group consisting of:

tetracyclododecene;

2-phenyl-tetracyclododecene (PhTD);

2-benzyl-1,2,3,4,4a,5,8,8a-octahydro-1,4:5,8-dimethanonaphthalene;

2-phenethyl-1,2,3,4,4a,5,8,8a-octahydro-1,4:5,8-dimethanonaphthalene (PETD);

2-hexyl-1,2,3,4,4a,5,8,8a-octahydro-1,4:5,8-dimethanonaphthalene (HexylTD);

2-decyl-1,2,3,4,4a,5,8,8a-octahydro-1,4:5,8-dimethanonaphthalene (DecylTD);

(1,2,3,4,4a,5,8,8a-octahydro-1,4:5,8-dimethanonaphthalen-2-yl)methyl acetate (TDMeOAc);

tetracyclododecadiene;

5-(4-phenylbutyl)bicyclo[2.2.1]hept-2-ene;

5-(3-phenylpropyl)bicyclo[2.2.1]hept-2-ene;

5-phenethylbicyclo[2.2.1]hept-2-ene;

5-benzylbicyclo[2.2.1]hept-2-ene;

5-(benzyloxy)bicyclo[2.2.1]hept-2-ene;

5-(2-([1,1′-biphenyl]-4-yloxy)ethyl)bicyclo[2.2.1]hept-2-ene;

5-(2-([1,1′-biphenyl]-2-yloxy)ethyl)bicyclo[2.2.1]hept-2-ene;

5-butylbicyclo[2.2.1]hept-2-ene;

5-hexylbicyclo[2.2.1]hept-2-ene;

5-octylbicyclo[2.2.1]hept-2-ene;

5-decylbicyclo[2.2.1]hept-2-ene;

5-ethylidenebicyclo[2.2.1]hept-2-ene;

2-ethylidene-1,2,3,4,4a,5,8,8a-octahydro-1,4:5,8-dimethanonaphthalene;

3a,4,4a,5,8,8a,9,9a-octahydro-1H-4,9:5,8-dimethanocyclopenta[b]naphthalene;

5-norbornenylmethyleugenyl acetate;

3-(bicyclo[2.2.1]hept-5-en-2-yl)phenyl acetate;

1,4-di(bicyclo[2.2.1]hept-5-en-2-yl)butane (NBBuNB); and

5-(2-([1,1′-biphenyl]-4-yl)ethyl)bicyclo[2.2.1]hept-2-ene.

6. The composition according to claim 1 , wherein said one or more monomer of formula (I) is selected from the group consisting of:

tetracyclododecene (TD);

2-phenethyl-1,2,3,4,4a,5,8,8a-octahydro-1,4:5,8-dimethanonaphthalene (PETD);

5-butylbicyclo[2.2.1]hept-2-ene (BuNB);

5-hexylbicyclo[2.2.1]hept-2-ene (HexylNB);

5-decylbicyclo[2.2.1]hept-2-ene (DecylNB);

5-phenethylbicyclo[2.2.1]hept-2-ene (PENB);

5-(2-([1,1′-biphenyl]-4-yloxy)ethyl)bicyclo[2.2.1]hept-2-ene; and

5-(2-([1,1′-biphenyl]-2-yloxy)ethyl)bicyclo[2.2.1]hept-2-ene (NBEtO-2-PhPh);

3a,4,4a,5,8,8a,9,9a-octahydro-1H-4,9:5,8-dimethanocyclopenta[b]naphthalene (CPD3);

and mixtures in any combination thereof.

7. The composition according to claim 1 , wherein the organo-ruthenium compound is selected from the group consisting of a compound of formula (IIIA), a compound of formula (IIIB) and a compound of formula (IIIC):

and

wherein:

X is a halogen or an anionic ligand;

Y is selected from the group consisting of 0 and S;

Y′ is OR 9 SR 9 and —N═CHC(O)O(C 1 -C 6 )alkyl, where R 9 is selected from the group consisting of methyl, ethyl, linear or branched (C 1 -C 6 )alkyl, (C 6 -C 10 )aryl, methoxy, ethoxy, linear or branched (C 1 -C 6 )alkoxy, (C 6 -C 10 )aryloxy, —OCH(CH 3 )C(O)N(CH 3 )(OCH 3 );

L is PR 3 or O═PR 3 , where R is independently selected from the group consisting of isopropyl, sec-butyl, tert-butyl, cyclohexyl, bicyclo(C 5 -C 10 )alkyl, phenyl, benzyl, isopropoxy, sec-butoxy, tert-butoxy, cyclohexyloxy, phenoxy and benzyloxy; or

X and L form a bidentate anionic ligand of the formula X-L;

R 7 is selected from the group consisting of isopropyl, sec-butyl, tert-butyl, substituted or unsubstituted cyclohexyl, substituted or unsubstituted phenyl, substituted or unsubstituted biphenyl and substituted or unsubstituted naphthyl;

R 8 is selected from the group consisting of methyl, ethyl, linear or branched (C 1 -C 6 )alkyl, (C 6 -C 10 )aryl, methoxy, ethoxy, linear or branched (C 1 -C 6 )alkoxy, (C 6 -C 10 )aryloxy, —NHCO(C 1 -C 6 )alkyl, —NHCO-perfluoro(C 1 -C 6 )alkyl, —SO 2 N((C 1 -C 6 )alkyl) 2 and —NO 2 ;

Ar 1 , Ar 2 Ar 3 and Ara are the same or different and each independently selected from the group consisting of substituted or unsubstituted phenyl, substituted or unsubstituted biphenyl and substituted or unsubstituted naphthyl;

wherein said substituents are selected from the group consisting of methyl, ethyl, iso-propyl, tert-butyl and phenyl.

8. The composition according to claim 1 , wherein the organo-ruthenium compound is selected from the group consisting of:

1,3-bis(2,4,6-trimethylphenylimidazolidin-2-ylidene)(tricyclohexylphosphine)-(2-oxobenzylidene)ruthenium (VI) chloride;

where X=halogen, —OR a , —O(CO)R a —OSO 2 R a , where R a is (C 1 -C 12 )alkyl, (C 3 -C 12 )cycloalkyl, (C 6 -C 14 )aryl;

where X is Cl or I and R 10 is hydrogen, NO 2 or Cl;

cis-[1,3-Bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene]dichloro(3-phenyl-1H-inden-1-ylidene)(triisopropylphosphite)ruthenium (II); and

1,3-bis(2,4,6-trimethylphenylimidazolidin-2-ylidene)-(2-oxobenzylidene)-2-(((2,6-diisopropylphenyl-imino)methyl)phenoxy)ruthenium.

9. The composition according to claim 1 , wherein the compound capable of generating Bronsted acid upon subjecting to photolytic condition is a compound of the formula (V), wherein Y is fluorine, chlorine, bromine and iodine; and R 30 and R 31 are the same or different and independently of each other is selected from the group consisting of hydrogen, methoxy, ethoxy, n-propoxy, iso-propoxy, butoxy.

10. The composition according to claim 9 , wherein the compound capable of generating Bronsted acid upon subjecting to photolytic condition is selected from the group consisting of:

1-chloro-4-methoxy-9H-thioxanthen-9-one;

1-chloro-4-ethoxy-9H-thioxanthen-9-one;

1-chloro-4-propoxy-9H-thioxanthen-9-one;

1-chloro-2-propoxy-9H-thioxanthen-9-one;

1-chloro-2-ethoxy-9H-thioxanthen-9-one;

1-chloro-2-methoxy-9H-thioxanthen-9-one;

1-chloro-4-methyl-9H-thioxanthen-9-one;

1-chloro-4-ethyl-9H-thioxanthen-9-one;

1-bromo-4-propoxy-9H-thioxanthen-9-one;

1-chloro-4-phenoxy-9H-thioxanthen-9-one;

2-methyl-4,6-bis(trichloromethyl)-1,3,5-triazine;

2-ethyl-4,6-bis(trichloromethyl)-1,3,5-triazine;

2-methyl-4,6-bis(tribromomethyl)-1,3,5-triazine;

2-(2-(furan-2-yl)vinyl)-4,6-bis(trichloromethyl)-1,3,5-triazine;

2-(2-(thiophen-2-yl)vinyl)-4,6-bis(trichloromethyl)-1,3,5-triazine;

2-(4-methoxystyryl)-4,6-bis(trichloromethyl)-1,3,5-triazine; and

2-(2-methoxystyryl)-4,6-bis(trichloromethyl)-1,3,5-triazine.

11. The composition according to claim 1 , which is selected from the group consisting of:

a mixture of 2-phenethyl-1,2,3,4,4a,5,8,8a-octahydro-1,4:5,8-dimethanonaphthalene (PETD), 3,7,14-tris(((2-(bicyclo[2.2.1]hept-5-en-2-yl)ethyl)dimethylsilyl)oxy)-1,3,5,7,9,11,14-heptaisobutyl-2,4,6,8,10,12,13,15,16-nonaoxa-1,3,5,7,9,11,14-heptasilatricyclo[7.3.3.15,11]hexadecane (trisnorbornenylisobutyl-POSS), 1,3-bis(2,4,6-trimethylphenylimidazolidin-2-ylidene)-(2-oxobenzylidene)-2-(((2,6-diisopropylphenyl-imino)methyl)phenoxy)ruthenium and 1-chloro-4-propoxy-9H-thioxanthen-9-one (CPTX);

a mixture of 2-phenethyl-1,2,3,4,4a,5,8,8a-octahydro-1,4:5,8-dimethanonaphthalene (PETD), 3,3′-oxybis(1,5-bis(2-(bicyclo[2.2.1]hept-5-en-2-yl)ethyl)-3-cyclohexyl-1,1,5,5-tetramethyltrisiloxane)(TeTENBOMSS), 1,3-bis(2,4,6-trimethylphenylimidazolidin-2-ylidene)-(2-oxobenzylidene)-2-(((2,6-diisopropylphenyl-imino)methyl)phenoxy)ruthenium and 1-chloro-4-propoxy-9H-thioxanthen-9-one (CPTX);

a mixture of 2-phenethyl-1,2,3,4,4a,5,8,8a-octahydro-1,4:5,8-dimethanonaphthalene (PETD), 3a,4,4a,5,8,8a,9,9a-octahydro-1H-4,9:5,8-dimethanocyclopenta[b]naphthalene (CPD3), 3,3′-oxybis(1,5-bis(2-(bicyclo[2.2.1]hept-5-en-2-yl)ethyl)-3-cyclohexyl-1,1,5,5-tetramethyltrisiloxane)(TeTENBOMSS), 1,3-bis(2,4,6-trimethylphenylimidazolidin-2-ylidene)-(2-oxobenzylidene)-2-(((2,6-diisopropylphenyl-imino)methyl)phenoxy)ruthenium and 1-chloro-4-propoxy-9H-thioxanthen-9-one (CPTX);

a mixture of 2-phenethyl-1,2,3,4,4a,5,8,8a-octahydro-1,4:5,8-dimethanonaphthalene (PETD), 3a,4,4a,5,8,8a,9,9a-octahydro-1H-4,9:5,8 dimethanocyclopenta[b]naphthalene (CPD3), 1,3-bis(2-bicyclo[2.2.1]hept-5-en-2-yl)ethyl)-1,1,3,3-tetramethyldisiloxane (BisENBTMDS), 1,3-bis(2,4,6-trimethylphenylimidazolidin-2-ylidene)-(2-oxobenzylidene)-2-(((2,6-diisopropylphenyl-imino)methyl)phenoxy)ruthenium and 1-chloro-4-propoxy-9H-thioxanthen-9-one (CPTX); and

a mixture of 2-hexyl-1,2,3,4,4a,5,8,8-octahydro-1,4:5,8-dimethanonaphthalene (HexylTD), 3a,4,4a,5,8,8a,9,9a-octahydro-1H-4,9:5,8-dimethanocyclopenta[b]naphthalene (CPD3), 1,3-bis(2-(bicyclo[2.2.1]hept-5-en-2-yl)ethyl)-1,1,3,3-tetramethyldisiloxane (BisENBTMDS), 1,3-bis(2,4,6-trimethylphenylimidazolidin-2-ylidene)-(2-oxobenzylidene)-2-(((2,6-diisopropylphenyl-imino)methyl)phenoxy)ruthenium and 1-chloro-4-propoxy-9H-thioxanthen-9-one (CPTX).

12. A kit for forming a three dimensional object comprising:

a) one or more monomers of formula (I):

wherein:

m is an integer 0, 1 or 2;

is a single bond or a double bond;

R 1 , R 2 , R 3 and R 4 are the same or different and each independently selected from the group consisting of hydrogen, halogen, methyl, ethyl, linear or branched (C 3 -C 16 )alkyl, (C 2 -C 16 )alkenyl, perfluoro(C 1 -C 12 )alkyl, (C 3 -C 12 )cycloalkyl, (C 6 -C 12 )bicycloalkyl, (C 7 -C 14 )tricycloalkyl, methoxy, ethoxy, linear or branched (C 3 -C 16 )alkoxy, (C 2 -C 6 )acyl, (C 2 -C 6 )acyloxy, (C 6 -C 14 )aryl, (C 6 -C 14 )aryl(C 1 -C 6 )alkyl, perfluoro(C 6 -C 14 )aryl, perfluoro(C 6 -C 14 )aryl(C 1 -C 3 )alkyl, (C 6 -C 14 )aryloxy, (C 6 -C 14 )aryl(C 1 -C 6 )alkoxy, tri(C 1 -C 6 )alkoxysilyl and a group of formula (A):

—Z-Aryl  (A)

wherein:

Z is a bond or a group selected from the group consisting of:

(CR 5 R 6 ) a , O(CR 5 R 6 ) a , (CR 5 R 6 ) a O, (CR 5 R 6 ) a —O—(CR 5 R 6 ) b , (CR 5 R 6 ) a —O—(SiR 5 R 6 ) b , (CR 5 R 6 ) a —(CO)O—(CR 5 R 6 ) b , (CR 5 R 6 ) a —O(CO)—(CR 5 R 6 ) b , (CR 5 R 6 ) a —(CO)—(CR 5 R 6 ) b , where a and b are integers which may be the same or different and each independently is 1 to 12;

R 5 and R 6 are the same or different and each independently selected from the group consisting of hydrogen, methyl, ethyl, linear or branched (C 3 -C 6 )alkyl, methoxy, ethoxy, linear or branched (C 3 -C 6 )alkyloxy, (C 2 -C 6 )acyl, (C 2 -C 6 )acyloxy, phenyl and phenoxy;

Aryl is phenyl or phenyl substituted with one or more of groups selected from the group consisting of methyl, ethyl, linear or branched (C 3 -C 6 )alkyl, hydroxy, methoxy, ethoxy, linear or branched (C 3 -C 6 )alkyloxy, (C 2 -C 6 )acyl, (C 2 -C 6 )acyloxy, phenyl and phenoxy; or

one of R 1 or R 2 taken together with one of R 3 or R 4 and the carbon atoms to which they are attached to form a (C 5 -C 7 )carbocyclic ring optionally containing one or more double bonds;

b) one or more compounds selected from the group consisting of:

1,3-bis(2-(bicyclo[2.2.1]hept-5-en-2-yl)ethyl)-1,1,3,3-tetramethyldisiloxane (BisENBTMDS);

1,5-bis(2-(bicyclo[2.2.1]hept-5-en-2-yl)ethyl)-1,1,3,3,5,5-hexamethyltrisiloxane (BisENBHMTS);

1,4-bis((2-(bicyclo[2.2.1]hept-5-en-2-yl)ethyl)dimethylsilyl)benzene;

3,3′-oxybis(1,5-bis(2-(bicyclo[2.2.1]hept-5-en-2-yl)ethyl)-3-cyclohexyl-1,1,5,5-tetramethyltrisiloxane)(TeTENBOMSS); and

3,7,14-tris(((2-(bicyclo[2.2.1]hept-5-en-2-yl)ethyl)dimethylsilyl)oxy)-1,3,5,7,9,11,14-heptaisobutyl-2,4,6,8,10,12,13,15,16-nonaoxa-1,3,5,7,9,11,14-heptasilatricyclo[7.3.3.15,11]hexadecane (trisnorbornenylisobutyl POSS);

c) an organo-ruthenium compound selected from the group consisting of:

a compound of formula (IIB):

a compound of formula (IIIA):

a compound of formula (IIIB):

a compound of formula (IIIC):

and

1,3-bis(2,4,6-trimethylphenylimidazolidin-2-ylidene)-(2-oxobenzylidene)-2-(((2,6-diisopropylphenyl-imino)methyl)phenoxy)ruthenium;

wherein:

X is a halogen or an anionic ligand;

Y is selected from the group consisting of 0 and S;

Y′ is OR 9 SR 9 and —N═CHC(O)O(C 1 -C 6 )alkyl, where R 9 is selected from the group consisting of methyl, ethyl, linear or branched (C 1 -C 6 )alkyl, (C 6 -C 10 )aryl, methoxy, ethoxy, linear or branched (C 1 -C 6 )alkoxy, (C 6 -C 10 )aryloxy, —OCH(CH 3 )C(O)N(CH 3 )(OCH 3 );

L is PR 3 or O═PR 3 , where R is independently selected from the group consisting of isopropyl, sec-butyl, tert-butyl, cyclohexyl, bicyclo(C 5 -C 10 )alkyl, phenyl, benzyl, isopropoxy, sec-butoxy, tert-butoxy, cyclohexyloxy, phenoxy and benzyloxy; or

X and L form a bidentate anionic ligand of the formula X-L;

R 7 is selected from the group consisting of isopropyl, sec-butyl, tert-butyl, substituted or unsubstituted cyclohexyl, substituted or unsubstituted phenyl, substituted or unsubstituted biphenyl and substituted or unsubstituted naphthyl;

R 8 is selected from the group consisting of methyl, ethyl, linear or branched (C 1 -C 6 )alkyl, (C 6 -C 10 )aryl, methoxy, ethoxy, linear or branched (C 1 -C 6 )alkoxy, (C 6 -C 10 )aryloxy, —NHCO(C 1 -C 6 )alkyl, —NHCO-perfluoro(C 1 -C 6 )alkyl, —SO 2 N((C 1 -C 6 )alkyl) 2 and —NO 2 ;

Ar 1 , Ar 2 Ar 3 and Ara are the same or different and each independently selected from the group consisting of substituted or unsubstituted phenyl, substituted or unsubstituted biphenyl and substituted or unsubstituted naphthyl;

wherein said substituents are selected from the group consisting of methyl, ethyl, iso-propyl, tert-butyl and phenyl; and

d) a compound of formula (V):

wherein

Y is halogen; and

R 30 and R 31 are the same or different and independently of each other selected from hydrogen, methyl, ethyl, linear or branched (C 3 -C 12 )alkyl, (C 3 -C 12 )cycloalkyl, (C 6 -C 12 )bicycloalkyl, (C 7 -C 14 )tricycloalkyl, (C 6 -C 10 )aryl, (C 6 -C 10 )aryl(C 1 -C 3 )alkyl, (C 1 -C 12 )alkoxy, (C 3 -C 12 )cycloalkoxy, (C 6 -C 12 )bicycloalkoxy, (C 7 -C 14 )tricycloalkoxy, (C 6 -C 10 )aryloxy(C 1 -C 3 )alkyl and (C 6 -C 10 )-aryloxy.

13. The kit according to claim 12 , which contains a compound of formula (V) selected from the group consisting of:

1-chloro-4-methoxy-9H-thioxanthen-9-one;

1-chloro-4-ethoxy-9H-thioxanthen-9-one;

1-chloro-4-propoxy-9H-thioxanthen-9-one;

1-chloro-2-propoxy-9H-thioxanthen-9-one;

1-chloro-2-ethoxy-9H-thioxanthen-9-one;

1-chloro-2-methoxy-9H-thioxanthen-9-one;

1-chloro-4-methyl-9H-thioxanthen-9-one;

1-chloro-4-ethyl-9H-thioxanthen-9-one;

1-bromo-4-propoxy-9H-thioxanthen-9-one; and

1-chloro-4-phenoxy-9H-thioxanthen-9-one.

14. The kit according to claim 12 , which contains at least two monomers of formula (I) distinct from one another, wherein one monomer is completely soluble in the other monomer, and when said composition is exposed to radiation at 395 nm for a sufficient length of time it forms a three dimensional object.

15. The kit according to claim 12 , which contains a mixture of 2-phenethyl-1,2,3,4,4a,5,8,8a-octahydro-1,4:5,8-dimethanonaphthalene (PETD), 3a,4,4a,5,8,8a,9,9a-octahydro-1H-4,9:5,8-dimethanocyclopenta[b]naphthalene (CPD3), 1,3-bis(2-(bicyclo[2.2.1]hept-5-en-2-yl)ethyl)-1,1,3,3-tetramethyldisiloxane (BisENBTMDS), 1,3-bis(2,4,6-trimethylphenylimidazolidin-2-ylidene)-(2-oxobenzylidene)-2-(((2,6-diisopropylphenyl-imino)methyl)phenoxy)ruthenium and 1-chloro-4-propoxy-9H-thioxanthen-9-one (CPTX).

16. The kit according to claim 12 , which contains a mixture of 2-hexyl-1,2,3,4,4a,5,8,8a-octahydro-1,4:5,8-dimethanonaphthalene (HexylTD), 3a,4,4a,5,8,8a,9,9a-octahydro-1H-4.9:5,8-dimethanocyclopenta[b]naphthalene (CPD3), 1,3-bis(2-(bicyclo[2.2.1]hept-5-en-2-yl)ethyl)-1,1,3,3-tetramethyldisiloxane (BisENBTMDS), 1,3-bis(2,4,6-trimethylphenylimidazolidin-2-ylidene)-(2-oxobenzylidene)-2-(((2,6-diisopropylphenyl-imino)methyl)phenoxy)ruthenium and 1-chloro-4-propoxy-9H-thioxanthen-9-one (CPTX).

17. The kit according to claim 12 , which contains a mixture of 2-phenethyl-1,2,3,4,4a,5,8,8a-octahydro-1,4:5,8-dimethanonaphthalene (PETD), 3,7,14-tris(((2-bicyclo[2.2.1]hept-5-en-2-yl)ethyl)dimethylsilyl)oxy)-1,3,5,7,9,11,14-heptaisobutyl-2,4,6,8,10,12,13,15,16-nonaoxa-1,3,5,7,9,11,14-heptasilatricyclo[7.3.3.15,11]hexadecane (trisnorbornenylisobutyl POSS), 1,3-bis(2,4,6-trimethylphenylimidazolidin-2-ylidene)-(2-oxobenzylidene)-2-(((2,6-diisopropylphenyl-imino)methyl)phenoxy)ruthenium and 1-chloro-4-propoxy-9H-thioxanthen-9-one (CPTX).

18. A three dimensional object comprising the composition of claim 1 .

19. The kit according to claim 12 , which contains a mixture of 2-phenethyl-1,2,3,4,4a,5,8,8a-octahydro-1,4:5,8-dimethanonaphthalene (PETD), 3,3′-oxybis(1,5-bis(2-(bicyclo[2.2.1]hept-5-en-2-yl)ethyl)-3-cyclohexyl-1,1,5,5-tetramethyltrisiloxane) (TeTENBOMSS), 1,3-bis(2,4,6-trimethylphenylimidazolidin-2-ylidene)-(2-oxobenzylidene)-2-(((2,6-diisopropylphenyl-imino)methyl)phenoxy)ruthenium and 1-chloro-4-propoxy-9H-thioxanthen-9-one (CPTX).

20. The kit according to claim 12 , which contains a mixture of 2-phenethyl-1,2,3,4,4a,5,8,8a-octahydro-1,4:5,8-dimethanonaphthalene (PETD), 3a,4,4a,5,8,8a,9,9a-octahydro-1H-4,9:5,8-dimethanocyclopenta[b]naphthalene (CPD3), 3,3′-oxybis(1,5-bis(2-(bicyclo[2.2.1]hept-5-en-2-yl)ethyl)-3-cyclohexyl-1,1,5,5-tetramethyltrisiloxane) (TeTENBOMSS), 1,3-bis(2,4,6-trimethylphenylimidazolidin-2-ylidene)-(2-oxobenzylidene)-2-(((2,6-diisopropylphenyl-imino)methyl)phenoxy)ruthenium and 1-chloro-4-propoxy-9H-thioxanthen-9-one (CPTX).