US5352712A — Ultraviolet radiation-curable coatings for optica…

Claim 1

Independent Claim 180 words

A radiation-curable primary coating composition for an optical fiber comprising (A) from about 10 percent to about 90 percent by weight of a reactively terminated urethane oligomer which is the reaction product of (i) a hydrocarbon polyol, the hydrocarbon portion of which is fully or partially hydrogenated and has a weight average molecular weight of from about 500 to about 4,000; (ii) a wholly aliphatic polyisocyanate; and (iii) an endcapping monomer supplying a reactive terminus; (B) from about 10 percent to about 90 percent by weight of a hydrocarbon monomer containing between 6 and 20 carbon atoms which is terminated with at least one end group reactive with the reactive terminus of (A); and (C) optionally, from about 0.05 percent to about 10.0 percent by weight of photoinitiator, wherein all of the stated percentages are percentages by weight based on the total weight of (A), (B), and (C), wherein the tensile modulus of the coating composition, when cured, is less about 500 psi at 25° C., and wherein the refractive index of the cured coating composition is 1.48 or higher.

Claim 2

Dependent Claim 180 words

A radiation-curable primary coating composition for an optical fiber comprising (A) from about 10 percent to about 90 percent by weight of a reactively terminated urethane oligomer which is the reaction product of (i) a hydrocarbon polyol, the hydrocarbon portion of which is fully or partially hydrogenated and has a weight average molecular weight of from about 500 to about 4,000; (ii) a wholly aliphatic polyisocyanate; and (iii) an endcapping monomer supplying a reactive terminus; (B) from about 10 percent to about 90 percent by weight of a hydrocarbon monomer containing between 6 and 20 carbon atoms which is terminated with at least one end group reactive with the reactive terminus of (A); and (C) optionally, from about 0.05 percent to about 10.0 percent by weight of photoinitiator, wherein all of the stated percentages are percentages by weight based on the total weight of (A), (B), and (C), wherein the tensile modulus of the coating composition, when cured, is less about 500 psi at 25° C., and wherein the refractive index of the cured coating composition is 1.48 or higher.

Claim 3

Dependent Claim 44 words

A radiation-curable primary coating composition for an optical fiber according to claim 1 wherein said oligomer (A) is terminated with a terminus selected from the group consisting of acrylic, methacrylic, vinylic, allylic, itaconic, crotonic, styrenic, acrylamide, norbornenyl, acetylenic, epoxy, mercapto, amino and mixtures thereof.

Claim 4

Dependent Claim 57 words

A radiation-curable primary coating composition for an optical fiber according to claim 1 wherein said hydrocarbon polyol (i) is selected from the group consisting of fully or partially hydrogenated 1,2-polybutadiene polyol; 1,2-polybutadiene polyol hydrogenated to an iodine number of from 9 to 21; fully or partially hydrogenated polyisobutylene polyol; polybutene polyol; hydrogenated dimer diol; and mixtures thereof.

Claim 5

Dependent Claim 34 words

A radiation-curable primary coating composition for an optical fiber according to claim 1 wherein said organic polyisocyanate (ii) is selected from the group consisting of isophorone diisocyanante; dicyclohexylmethane-4, 4'-diisocyanante; hexamethylene diisocyanate; and trimethylhexamethylene diisocyanate.

Claim 6

Dependent Claim 24 words

A radiation-curable primary coating composition for an optical fiber according to claim 1 wherein said oligomer (A) is endcapped with an hydroxyalkyl vinyl ether.

Claim 7

Dependent Claim 20 words

A radiation-curable primary coating composition for an optical fiber according to claim 5 wherein said ether is hydroxybutyl vinyl ether.

Claim 8

Dependent Claim 22 words

A radiation-curable primary coating composition for an optical fiber according to claim 1 wherein said oligomer (A) is endcapped with allyl ether.

Claim 9

Dependent Claim 181 words

A radiation-curable primary coating composition for an optical fiber according to claim 1 wherein said oligomer (A) is characterized by the formula ##STR4## where R 1 is a linear or branched hydrocarbon polymer of from 500 to 4,000 molecular weight selected from the group consisting of fully or partially hydrogenated 1,2-polybutadiene; 1,2-polybutadiene hydrogenated to an iodine number of from 9 to 21; fully or partially hydrogenated polyisobutylene; polybutene polyol; and hydrogenated dimer diol; R 2 is a linear, branched or cyclic alkylene of from six to twenty carbon atoms; and X and Q are independently either (a) a radical or the formula: ##STR5## wherein R 5 is selected from the group consisting of acrylic, methacrylic, vinylic, allylic, itaconic, crotonic, styrenic, acrylamide, norbornenyl, acetylenic, epoxy, mercapto and amino; R 3 and R 4 are independently hydrogen, methyl, ethyl or propyl; m is an integer from 1 to 10; and p is either zero or one, or (b) a saturated alkyl radical of from nine to twenty carbon atoms, with the proviso that said oligomer must possess at least one reactive terminal group.

Claim 10

Dependent Claim 107 words

A radiation-curable primary coating composition according to claim 1 wherein said monomer (B) is selected from the group consisting of hexyl acrylate; hexyl methacrylate; 2-ethylhexyl acrylate; 2-ethylhexyl methacrylate; octyl acrylate; octyl methacrylate; isooctyl acrylate; isooctyl methacrylate; decyl acrylate; decyl methacrylate; isodecyl acrylate; isodecyl methacrylate; lauryl acrylate; lauryl methacrylate; stearyl acrylate; stearyl methacrylate; C 14 -C 15 hydrocarbon diol diacrylates; C 14 -C 15 hydrocarbon diol dimethacrylates; tridecyl acrylate; tridecyl methacrylate; palmitic acrylate; palmitic methacrylate; 1,10-decane dithiol; hexanediol divinyl ether; mercaptoacetate esters; mercaptopropionate esters; lauryl vinyl ether; ethylhexylvinyl ether; isodecyl vinyl ether; butanediol divinyl ether; cyclohexanedimethanol divinyl ether; C 14 -C 15 diol divinyl ethers; and mixtures thereof.

Claim 11

Dependent Claim 41 words

A radiation-curable primary coating composition according to claim 1 additionally comprising from about 1.0 percent to about 50.0 percent by weight, based on total weight of (A), (B) and (C), of a crosslinking agent (D) distinct from (A), (B) and (C).

Claim 12

Dependent Claim 27 words

A radiation-curable primary coating composition according to claim 10 wherein said crosslinking agent (D) comprises trimethylol ethane trivinyl ether and is distinct from (A), (B) and (C).

Claim 13

Dependent Claim 34 words

A radiation-curable primary coating composition according to claim 1 additionally comprising from about 0.0001 percent to about 3.0 percent by weight, based on total weight of (A), (B) and (C), of a stabilizer (E).

Claim 14

Dependent Claim 46 words

A radiation-curable primary coating composition according to claim 12 wherein said stabilizer (E) is selected from the group consisting of diethyl hydroxylamine; organic phosphites; hindered phenols; trihexylamine; octadecyl-3-(3', 5'-di-tert-butyl-4'-hydroxy phenyl) propionate; thiodiethylene bis (3,5-di-tert-butyl-4-hydroxy) hydrocinnamate; butylated paracresol-dicyclopentadiene copolymer; tetrakis [methylene (3,5-di-tert-butyl-4-hydroxyhydrocinnamate)]methane; 3-aminopropyltrimethoxy silane; and mixtures thereof.

Claim 15

Dependent Claim 37 words

A radiation-curable primary coating composition according to claim 1 additionally comprising from about 0.1 percent to about 3.0 percent by weight, based on total weight of (A), (B) and (C), of an organofunctional silane adhesion promoter (F).

Claim 16

Dependent Claim 39 words

A radiation-curable primary coating composition according to claim 14 wherein said silane adhesion promoter (F) is selected from the group consisting of amino-functional silanes; mercapto-functional silanes; acrylate-functional silanes; methacrylate-functional silanes; acrylamido-functional silanes; allyl-functional silanes; vinyl-functional silanes; and mixtures thereof.

Claim 17

Dependent Claim 37 words

A radiation-curable primary coating composition according to claim 14 wherein said silane adhesion promoter (F) is selected from the group consisting of mercaptoalkyl trialkoxy silane; methacryloxyalkyl trialkoxy silane; aminoalkyl trialkoxy silane; vinyl trialkoxy silane; and mixtures thereof.

Claim 18

Dependent Claim 19 words

A radiation-curable primary coating composition according to claim 1 wherein said silane adhesion promoter (F) is gamma-mercaptopropyl trimethoxy silane.

Claim 19

Dependent Claim 65 words

A radiation-curable primary coating composition for an optical fiber according to claim 1 wherein said photoinitiator (C) is selected from the group consisting of hydroxymethylphenyl propanone; hydroxycyclohexylphenyl ketone; dimethoxyphenyl acetophenone; 2-methyl-1, 4-(methyl thio) phenyl-2-morpholino-propane-1; 1-(4-isopropylphenyl)-2-hydroxy-2-methylpropan-1-one; 1-(4-dodecylphenyl)-2-hydroxy-2-methylpropan-1-one; 4-(2-hydroxyethoxy)phenyl-2(2-hydroxy-2-propyl) ketone; diethoxyacetophenone; 2,2-di-sec-butoxyaceto-phenone; diethoxyphenyl acetophenone; (4-octyloxyphenyl) phenyl iodonium hexafluoro antimonate; (4-octyloxyphenyl) diphenyl sulfonium hexafluoro antimonate; (4-decyloxyphenyl) phenyl iodonium hexafluoro antimonate; (4-otadecyloxyphenyl) phenyl iodonium hexafluoro antimonate; and mixtures thereof.

Claim 20

Dependent Claim 20 words

A radiation-curable primary coating composition for an optical fiber according to claim 1 wherein said photoinitiator (E) is hydroxymethylphenyl propanone.

Claim 21

Dependent Claim 23 words

A radiation-curable primary coating composition for an optical fiber according to claim 1 wherein said photoinitiator (E) is (4-octyloxyphenyl) phenyl iodonium hexafluoro antimonate.

Claim 22

Dependent Claim 42 words

A radiation-curable primary coating composition for an optical fiber according to claim 1 additionally comprising from about 0.1 percent to about 10 percent by weight, based on total weight of (A), (B) and (C), of a mercapto functional chain transfer agent (H).

Claim 23

Dependent Claim 56 words

A radiation-curable primary coating composition according to claim 1 additionally comprising from about 5 percent to about 60 percent by weight, based on total weight of (A), (B) and (C), of a monomer or oligomer (G) which is capable of increasing the refractive index relative to that of a composition containing only (A), (B) and (C).

Claim 24

Dependent Claim 32 words

A radiation-curable primary coating composition according to claim 22 wherein said monomer or oligomer (G) comprises (i) an aromatic moiety; (ii) a moiety providing a reactive terminus; and (iii) a hydrocarbon moiety.

Claim 25

Dependent Claim 35 words

A radiation-curable primary coating composition according to claim 22 wherein said monomer or oligomer (G) is selected from the group consisting of polyalkylene glycol nonylphenyl ether acrylates; polyalkylene glycol nonylphenyl ether methacrylates; and mixtures thereof.

Claim 26

Dependent Claim 120 words

A radiation-curable primary coating composition for an optical fiber, comprising (A) from about 30 percent to about 70 percent by weight of an aliphatic vinyl ether urethane oligomer having as a backbone a hydrogenated 1,2-polybutadiene polymer; (B) from about 5 percent to about 40 percent by weight of 1,10-decane dithiol; (C) from about 2 percent to about 10 percent by weight of hydroxymethyl phenyl propanone photoinitiator; (D) from about 1 percent to about 20 percent by weight of trimethylol ethane trivinyl ether crosslinking agent; and (E) from about 0.001 percent to about 0.1 percent by weight of diethyl hydroxyl amine stabilizer, wherein all of the stated percentages are percentages by weight based upon total weight of (A), (B), and (C).

Claim 27

Dependent Claim 120 words

A radiation-curable primary coating composition for an optical fiber, comprising (A) from about 30 percent to about 70 percent by weight of an aliphatic vinyl ether urethane oligomer having as a backbone a hydrogenated 1,2-polybutadiene polymer; (B) from about 5 percent to about 40 percent by weight of 1,10-decane dithiol; (C) from about 2 percent to about 10 percent by weight of hydroxymethyl phenyl propanone photoinitiator; (D) from about 1 percent to about 20 percent by weight of trimethylol ethane trivinyl ether crosslinking agent; and (E) from about 0.001 percent to about 0.1 percent by weight of diethyl hydroxyl amine stabilizer, wherein all of the stated percentages are percentages by weight based upon total weight of (A), (B), and (C).

Claim 28

Dependent Claim 29 words

A radiation curable primary coating composition according to claim 25 additionally comprising (F) from about 0.3 percent to about 1.0 percent by weight of gamma-mercaptopropyl trimethoxy silane adhesion promoter.

Claim 29

Dependent Claim 91 words

A radiation-curable primary coating composition for an optical fiber, comprising (A) from about 20 percent to about 80 percent by weight of an aliphatic vinyl ether-terminated urethane oligomer having as a backbone an hydrogenated 1,2-polybutadiene polymer; (B) from about 5 percent to about 80 percent by weight of hexanediol divinyl ether; and (C) from about 0.05 percent to about 5.0 percent by weight of (4-octyloxyphenyl) phenyl iodonium hexafluoro antimonate cationic cure initiator, wherein all of the stated percentages are percentages by weight based upon total weight of (A), (B) and (C).

Claim 30

Dependent Claim 91 words

A radiation-curable primary coating composition for an optical fiber, comprising (A) from about 20 percent to about 80 percent by weight of an aliphatic vinyl ether-terminated urethane oligomer having as a backbone an hydrogenated 1,2-polybutadiene polymer; (B) from about 5 percent to about 80 percent by weight of hexanediol divinyl ether; and (C) from about 0.05 percent to about 5.0 percent by weight of (4-octyloxyphenyl) phenyl iodonium hexafluoro antimonate cationic cure initiator, wherein all of the stated percentages are percentages by weight based upon total weight of (A), (B) and (C).

Claim 31

Dependent Claim 47 words

A radiation curable primary coating composition according to claim 27 additionally comprising (D) from about 0.3 percent to about 1.0 percent by weight of a silane adhesion promoter selected from the group consisting of mercapto-functional silanes; vinyl-functional silanes; acrylate-functional silanes; methacrylate-functional silanes; epoxy-functional silanes; and mixtures thereof.

Claim 32

Dependent Claim 236 words

A radiation-curable coating composition for the surface of an optically useful article comprising (A) from about 10 percent to about 90 percent by weight of a reactively terminated urethane oligomer which is the reaction product of (i) a hydrocarbon polyol, the hydrocarbon portion of which is fully or partially hydrogenated and has a weight average molecular weight of from about 500 to about 4,000; (ii) a wholly aliphatic polyisocyanate; and (iii) an endcapping monomer supplying a reactive terminus; (B) from about 10 percent to about 90 percent by weight of a hydrocarbon monomer containing between 6 and 20 carbon atoms which is terminated with at least one end group reactive with the reactive terminus of (A); (C) optionally, from about 0.05 percent to about 10.0 percent by weight of a photoinitiator; (F) from about 0.1 percent to about 3.0 percent by weight of an organofunctional silane adhesion promoter; and (G) from about 5 percent to about 60 percent by weight of a monomer or oligomer which is capable of increasing the reactive index relative to that of a composition containing only (A), (B) and (C), wherein all of the stated percentages are percentages by weight based on total weight of (A), (B), and (C). wherein the tensile modulus of the coating composition, when cured, is less about 500 psi at 25° C., and wherein the refractive index of the cured coating composition is 1.48 or higher.

Claim 33

Dependent Claim 236 words

A radiation-curable coating composition for the surface of an optically useful article comprising (A) from about 10 percent to about 90 percent by weight of a reactively terminated urethane oligomer which is the reaction product of (i) a hydrocarbon polyol, the hydrocarbon portion of which is fully or partially hydrogenated and has a weight average molecular weight of from about 500 to about 4,000; (ii) a wholly aliphatic polyisocyanate; and (iii) an endcapping monomer supplying a reactive terminus; (B) from about 10 percent to about 90 percent by weight of a hydrocarbon monomer containing between 6 and 20 carbon atoms which is terminated with at least one end group reactive with the reactive terminus of (A); (C) optionally, from about 0.05 percent to about 10.0 percent by weight of a photoinitiator; (F) from about 0.1 percent to about 3.0 percent by weight of an organofunctional silane adhesion promoter; and (G) from about 5 percent to about 60 percent by weight of a monomer or oligomer which is capable of increasing the reactive index relative to that of a composition containing only (A), (B) and (C), wherein all of the stated percentages are percentages by weight based on total weight of (A), (B), and (C). wherein the tensile modulus of the coating composition, when cured, is less about 500 psi at 25° C., and wherein the refractive index of the cured coating composition is 1.48 or higher.

Claim 34

Dependent Claim 47 words

A radiation-curable coating composition for the surface of an optically useful article according to claim 29 wherein said oligomer (A) is terminated with a terminus selected from the group consisting of acrylic, methacrylic, vinylic, allylic, itaconic, crotonic, styrenic, acrylamide, norbornenyl, acetylenic, epoxy, mercapto, amino and mixtures thereof.

Claim 35

Dependent Claim 60 words

A radiation-curable coating composition for the surface of an optically useful article according to claim 29 wherein said hydrocarbon polyol (i) is selected from the group consisting of fully or partially hydrogenated 1,2-polybutadiene polyol; 1,2-polybutadiene polyol hydrogenated to an iodine number of from 9 to 21; fully or partially hydrogenated polyisobutylene polyol; polybutene polyol; hydrogenated dimer diol; and mixtures thereof.

Claim 36

Dependent Claim 38 words

A radiation-curable coating composition for the surface of an optically useful article according to claim 29 wherein said organic polyisocyanate (ii) is selected from the group consisting of isophorone diisocyanante; dicyclo- hexylmethane-4, 4'-diisocyanante; hexamethylene diisocyanate; and trimethylhexamethylene diisocyanate.

Claim 37

Dependent Claim 26 words

A radiation-curable coating for the surface of an optically useful article according to claim 29 wherein said oligomer (A) is endcapped with an hydroxyalkyl vinyl ether.

Claim 38

Dependent Claim 22 words

A radiation-curable coating for the surface of an optically useful article according to claim 29 wherein said ether is hydroxybutyl vinyl ether.

Claim 39

Dependent Claim 24 words

A radiation-curable coating for the surface of an optically useful article according to claim 29 wherein said oligomer (A) is endcapped with allyl ether.

Claim 40

Dependent Claim 185 words

A radiation-curable coating for the surface of an optically useful article according to claim 29 wherein said oligomer (A) is characterized by the formula ##STR6## where R 1 is a linear or branched hydrocarbon polymer of from about 500 to about 4,000 molecular weight selected from the group consisting of fully or partially hydrogenated 1,2-polybutadiene; 1,2-polybutadiene hydrogenated to an iodine number of from 9 to 21; fully or partially hydrogenated polyisobutylene; polybutene polyol; and hydrogenated dimer diol; R 2 is a linear, branched or cyclic alkylene of from six to twenty carbon atoms; and X and Q are independently either (a) a radical or the formula: ##STR7## wherein R 5 is selected from the group consisting of acrylic, methacrylic, vinylic, allylic, itaconic, crotonic, styrenic, acrylamide, norbornenyl, acetylenic, epoxy, mercapto and amino; R 3 and R 4 are independently hydrogen, methyl, ethyl or propyl; m is an integer from 1 to 10; and p is either zero or one, or (b) a saturated alkyl radical of from nine to twenty carbon atoms, with the proviso that said oligomer must possess at least one reactive terminal group.

Claim 41

Dependent Claim 115 words

A radiation-curable coating composition for the surface of an optically useful article according to claim 29 wherein said monomer (B) is selected from the group consisting of hexyl acrylate; hexyl methacrylate; 2-ethylhexyl acrylate; 2-ethylhexyl methacrylate; octyl acrylate; octyl methacrylate; isooctyl acrylate; isooctyl methacrylate; decyl acrylate; decyl methacrylate; isodecyl acrylate; isodecyl methacrylate; lauryl acrylate; lauryl methacrylate; tridecyl acrylate; tridecyl methacrylate; palmitic acrylate; palmitic methacrylate; 1, 10-decane dithiol; hexanediol divinyl ether; mercaptoacetate esters; mercaptopropionate esters; lauryl vinyl ether, ehtylhexylvinyl ether; isodecyl vinyl ether; butanediol divinyl ether; cyclohexanedimethanol divinyl ether; C 14 -C 15 diol divinyl ethers; stearyl acrylate; stearyl methacrylate; C 14 -C 15 hydrocarbon diol diacrylates; C 14 -C 15 hydrocarbon diol dimethacrylates; and mixtures thereof.

Claim 42

Dependent Claim 48 words

A radiation-curable coating composition for the surface of an optically useful article according to claim 29 additionally comprising from about 1.0 percent to about 50.0 percent by weight, based on total weight of (A), (B) and (C), of a crosslinking agent (D) distinct from (A), (B) and (C).

Claim 43

Dependent Claim 34 words

A radiation-curable coating composition for the surface of an optically useful article according to claim 29 wherein said crosslinking agent (D) comprises trimethylol ethane trivinyl ether and is distinct from (A), (B) and (C).

Claim 44

Dependent Claim 41 words

A radiation-curable coating composition for the surface of an optically useful article according to claim 29 additionally comprising from about 0.0001 percent to about 3.0 percent by weight, based on total weight of (A), (B) and (C), of a stabilizer (E).

Claim 45

Dependent Claim 51 words

A radiation-curable coating for the surface of an optically useful article according to claim 40 wherein said stabilizer (E) is selected from the group consisting of diethyl hydroxylamine; organic phosphites; hindered phenols; trihexylamine; octadecyl-3-(3',5'-di-tert-butyl-4'-hydroxy phenyl) propionate; thiodiethylene bis (3,5-ditert-butyl-4-hydroxy) hydrocinnamate; butylated paracresol-dicyclopentadiene copolymer; tetrakis [methylene (3,5-di-tert-butyl-4-hydroxyhydrocinnamate)]methane; 3-aminopropyltrimethoxy silane; and mixtures thereof.

Claim 46

Dependent Claim 46 words

A radiation-curable coating composition for the surface of an optically useful article according to claim 29 wherein said silane adhesion promoter (F) is selected from the group consisting of amino-functional silanes; mercapto-functional silanes; acrylate-functional silanes; methacrylate-functional silanes; acrylamido-functional silanes; allyl-functional silanes; vinyl-functional silanes; and mixtures thereof.

Claim 47

Dependent Claim 44 words

A radiation-curable coating composition for the surface of an optically useful article according to claim 29 wherein said silane adhesion promoter (F) is selected from the group consisting of mercaptoalkyl trialkoxy silane; methacryloxyalkyl trialkoxy silane; aminoalkyl trialkoxy silane; vinyl trialkoxy silane; and mixtures thereof.

Claim 48

Dependent Claim 26 words

A radiation-curable coating composition for the surface of an optically useful article according to claim 42 wherein said silane adhesion promoter (F) comprises gamma-mercaptopropyl trimethoxy silane.

Claim 49

Dependent Claim 66 words

A radiation-curable coating composition for the surface of an optically useful article according to claim wherein said photoinitiator (C) is selected from the group consisting of hydroxymethylphenyl propanone; hydroxycyclohexylphenyl ketone; dimethoxyphenyl acetophenone; 2-methyl-1, 4-(methyl thio) phenyl-2-morpholino-propane-1; 1-(4-isopropyl-phenyl)-2-hydroxy-2-methyl-propan-1-one; 1-(4-dodecylphenyl)-2-hydroxy-2-methylpropan-1-one;4-(2-hydroxyethoxy)phenyl-2(2-hydroxy-2-propyl) ketone; diethoxyacetophenone; 2,2-di-sec-butoxyacetophenone; diethoxyphenyl acetophenone; (4-octyloxyphenyl) phenyl iodonium hexafluoro antimonate; (4-octyloxyphenyl) diphenyl sulfonium hexafluoro antimonate; (4-decyloxyphenyl) phenyl iodonium hexafluoro antimonate; (4-otadecyloxyphenyl) phenyl iodonium hexafluoro antimonate; and mixtures thereof.

Claim 50

Dependent Claim 23 words

A radiation-curable coating composition for the surface of an optically useful article according to claim 29 wherein said photoinitiator (C) comprises hydroxymethylphenyl propanone.

Claim 51

Dependent Claim 26 words

A radiation-curable coating composition for the surface of an optically useful article according to claim 29 wherein said photoinitiator (C) comprises (4-octyloxyphenyl) phenyl iodonium hexafluoro antimonate.

Claim 52

Dependent Claim 44 words

A radiation-curable coating for the surface of an optically useful article according to claim 29 additionally comprising from about 0.1 percent to about 10 percent by weight, based on total weight of (A), (B) and (C), of a mercapto functional chain transfer agent (H).

Claim 53

Dependent Claim 39 words

A radiation-curable coating composition for the surface of an optically useful article according to claim 29 wherein said monomer or oligomer (G) comprises (i) an aromatic moiety; (ii) a moiety providing a reactive terminus; and (iii) a hydrocarbon moiety.

Claim 54

Dependent Claim 42 words

A radiation-curable coating composition for the surface of an optically useful article according to claim 29 wherein said monomer or oligomer (G) is selected from the group consisting of polyalkylene glycol nonylphenyl ether acrylates; polyalkylene glycol nonylphenyl ether methacrylates; and mixtures thereof.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1997-10-03	1998-04-04	1998-10-04	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2001-10-03	2002-04-04	2002-10-04	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2005-10-03	2006-04-04	2006-10-04	$7700.00	Window Closed / Lapsed

Ultraviolet radiation-curable coatings for optical fibers

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