Photopolymerizable compositions featuring novel co-initiators

Claim 2

In a photopolymerizable composition comprising an addition-polymerizable compound containing ethylenic unsaturation, and a co-initiator composition comprising a carbonyl compound and a photopolymerization activator responsive in the presence of the photo-excited form of said carbonyl compound to form a free radical, said activator being selected from the group consisting of an amine other than a 3-ketocoumarin, an acetic acid derivative, a phosphine, a phosphite, a bismuthine, an arsine, a stibine, a sulfinic acid, a sulfinic acid ester, a sulfone, a dicarbonyl, a ketone, a bi-imidazole, and a stannate; the improvement wherein said carbonyl compound is a coumarin having an absorption maximum between about 250 and about 550 nm and a ##STR32## substituent in the 3-position, wherein R 1 is alkyl or alkenyl having 1 to about 12 carbon atoms, or a carbo-cyclic or heterocyclic group having about 5 to about 20 nuclear carbon and hetero atoms, said coumarin and said activator being present in an amount sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.

Claim 3

In a photopolymerizable composition comprising an addition-polymerizable compound containing ethylenic unsaturation and a co-initiator composition comprising an amine, other than a 3-ketocoumarin, capable of forming a free radical in the presence of a photo-excited carbonyl compound, and a carbonyl compound; the improvement wherein said carbonyl compound is a coumarin having an absorption maximum between about 250 and about 550 nm and a ##STR33## substituent in the 3-position, wherein R 1 is alkyl or alkenyl having 1 to about 12 carbon atoms, or a carbocyclic or heterocyclic group having about 5 to about 20 nuclear carbon and hetero atoms, said coumarin and said amine being present in an amount sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.

Claim 4

In a photopolymerizable composition comprising an addition-polymerizable compound containing ethylenic unsaturation and a co-initiator composition comprising an amine, other than a 3-ketocoumarin, capable of forming a free radical in the presence of a photo-excited carbonyl compound, and a carbonyl compound; the improvement wherein said carbonyl compound is a coumarin having an absorption maximum between about 250 and about 550 nm and a ##STR33## substituent in the 3-position, wherein R 1 is alkyl or alkenyl having 1 to about 12 carbon atoms, or a carbocyclic or heterocyclic group having about 5 to about 20 nuclear carbon and hetero atoms, said coumarin and said amine being present in an amount sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.

Claim 5

A composition as defined in claims 1 or 2, wherein said coumarin includes a polar substituent, whereby said coumarin is soluble in polar solvents.

Claim 6

In a photopolymerizable composition comprising an addition-polymerizable acrylate and a co-initiator composition comprising an amine capable of forming a free radical in the presence of a photo-excited carbonyl compound, and a carbonyl compound; the improvement wherein said carbonyl compound is 3-benzoyl-7-methoxycoumarin, said coumarin and said amine being present in an amount sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth of that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.

Claim 7

In a photopolymerizable composition comprising an addition-polymerizable acrylate and a co-initiator composition comprising an amine capable of forming a free radical in the presence of a photo-excited carbonyl compound, and a carbonyl compound; the improvement wherein said carbonyl compound is 3-benzoyl-7-methoxycoumarin, said coumarin and said amine being present in an amount sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth of that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.

Claim 8

In a photopolymerizable composition comprising an addition-polymerizable acrylate and a co-initiator composition comprising an amine capable of forming a free radical in the presence of a photo-excited carbonyl compound, and a carbonyl compound; the improvement wherein said carbonyl compound is 3-(2-benzofuroyl)-7-diethylaminocoumarin, said coumarin and said amine being present in an amount of sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth of that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.

Claim 9

In a photopolymerizable composition comprising an addition-polymerizable acrylate and a co-initiator composition comprising an amine capable of forming a free radical in the presence of a photo-excited carbonyl compound, and a carbonyl compound; the improvement wherein said carbonyl compound is 3-(2-benzofuroyl)-7-diethylaminocoumarin, said coumarin and said amine being present in an amount of sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth of that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.

Claim 10

In a photopolymerizable composition comprising an addition-polymerizable acrylate and a co-initiator composition comprising an amine capable of forming a free radical in the presence of a photo-excited carbonyl compound, and a carbonyl compound; the improvement wherein said carbonyl compound is 3-(2-benzofuroyl)-7-(1-pyrrolidinyl)coumarin, said coumarin and said amine being present in an amount sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.

Claim 11

In a photopolymerizable composition comprising an addition-polymerizable acrylate and a co-initiator composition comprising an amine capable of forming a free radical in the presence of a photo-excited carbonyl compound, and a carbonyl compound; the improvement wherein said carbonyl compound is 3-(2-benzofuroyl)-7-(1-pyrrolidinyl)coumarin, said coumarin and said amine being present in an amount sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.

Claim 12

A composition as defined in claims 5 or 6, wherein said amine is ethyl p-dimethylaminobenzoate.

Claim 13

A composition as defined in claims 5 or 6, wherein said amine is N-methyl-N-benzylaniline.

Claim 14

A composition as defined in claims 5 or 6, wherein said amine is a polymer.

Claim 15

In a photopolymerizable composition comprising an addition-polymerizable acrylate and a co-initiator composition comprising an amine capable of forming a free radical in the presence of a photo-excited carbonyl compound, and a carbonyl compound; the improvement wherein said carbonyl compound is 3-(p-diethylaminocinnamoyl)-7-diethylaminocoumarin, said coumarin and said amine being present in an amount sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.

Claim 16

In a photopolymerizable composition comprising an addition-polymerizable acrylate and a co-initiator composition comprising an amine capable of forming a free radical in the presence of a photo-excited carbonyl compound, and a carbonyl compound; the improvement wherein said carbonyl compound is 3-(p-diethylaminocinnamoyl)-7-diethylaminocoumarin, said coumarin and said amine being present in an amount sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.

Claim 17

In a photopolymerizable composition comprising an addition-polymerizable acrylate and a co-initiator composition comprising an amine capable of forming a free radical in the presence of a photo-excited carbonyl compound, and a carbonyl compound; the improvement wherein said carbonyl compound is 3,3'-carbonylbis(7-diethylaminocoumarin), said coumarin and said amine being present in an amount sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.

Claim 18

In a photopolymerizable composition comprising an addition-polymerizable acrylate and a co-initiator composition comprising an amine capable of forming a free radical in the presence of a photo-excited carbonyl compound, and a carbonyl compound; the improvement wherein said carbonyl compound is 3,3'-carbonylbis(7-diethylaminocoumarin), said coumarin and said amine being present in an amount sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.

Claim 19

In a photopolymerizable composition comprising an addition-polymerizable acrylate and a co-initiator composition comprising an amine capable of forming a free radical in the presence of a photo-excited carbonyl compound, and a carbonyl compound; the improvement wherein said carbonyl compound is 3,3'-carbonylbis(5,7-di-n-propoxycoumarin), said coumarin and said amine being present in an amount sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.

Claim 20

In a photopolymerizable composition comprising an addition-polymerizable acrylate and a co-initiator composition comprising an amine capable of forming a free radical in the presence of a photo-excited carbonyl compound, and a carbonyl compound; the improvement wherein said carbonyl compound is 3,3'-carbonylbis(5,7-di-n-propoxycoumarin), said coumarin and said amine being present in an amount sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.

Claim 21

In a photopolymerizable composition comprising an addition-polymerizable compound containing ethylenic unsaturation, and a co-initiator composition comprising a carbonyl compound and an activator capable of forming a free radical in the presence of the photoexcited form of said carbonyl compound, said activator having the structure: ##STR34## wherein R 6 , R 7 and R 8 are the same or different, and are each alkyl or alkoxy containing from 1 to about 20 carbon atoms, or aryl or alkaryl containing from 6 to 10 carbon atoms; the improvement wherein said carbonyl compound is a coumarin having an absorption maximum between about 250 and about 550 nm and a ##STR35## substituent in the 3-position, wherein R 1 is alkyl or alkenyl having 1 to about 12 carbon atoms, or a carbocyclic or heterocyclic group having about 5 to about 20 nuclear carbon and hetero atoms, said coumarin and said activator being present in an amount sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.

Claim 22

In a photopolymerizable composition comprising an addition-polymerizable compound containing ethylenic unsaturation, and a co-initiator composition comprising a carbonyl compound and an activator capable of forming a free radical in the presence of the photoexcited form of said carbonyl compound, said activator having the structure: ##STR34## wherein R 6 , R 7 and R 8 are the same or different, and are each alkyl or alkoxy containing from 1 to about 20 carbon atoms, or aryl or alkaryl containing from 6 to 10 carbon atoms; the improvement wherein said carbonyl compound is a coumarin having an absorption maximum between about 250 and about 550 nm and a ##STR35## substituent in the 3-position, wherein R 1 is alkyl or alkenyl having 1 to about 12 carbon atoms, or a carbocyclic or heterocyclic group having about 5 to about 20 nuclear carbon and hetero atoms, said coumarin and said activator being present in an amount sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.

Claim 23

In a photopolymerizable composition comprising an addition-polymerizable compound containing ethylenic unsaturation, and a co-initiator composition comprising a carbonyl compound and an activator capable of forming a free radical in the presence of the photoexcited form of said carbonyl compound, said activator having the structure: ##STR36## wherein R 9 , R 10 and R 11 are the same or different and are each alkyl containing from 1 to about 12 carbon atoms, or aryl or alkaryl containing from 6 to 10 carbon atoms, the improvement wherein said carbonyl compound is a coumarin having an absorption maximum between about 250 and about 550 nm and a ##STR37## substituent in the 3-position, wherein R 1 is alkyl or alkenyl having 1 to about 12 carbon atoms, or a carbocyclic or heterocyclic group having about 5 to about 20 nuclear carbon and hetero atoms, said coumarin and said activator being present in an amount sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.

Claim 24

In a photopolymerizable composition comprising an addition-polymerizable compound containing ethylenic unsaturation, and a co-initiator composition comprising a carbonyl compound and an activator capable of forming a free radical in the presence of the photoexcited form of said carbonyl compound, said activator having the structure: ##STR36## wherein R 9 , R 10 and R 11 are the same or different and are each alkyl containing from 1 to about 12 carbon atoms, or aryl or alkaryl containing from 6 to 10 carbon atoms, the improvement wherein said carbonyl compound is a coumarin having an absorption maximum between about 250 and about 550 nm and a ##STR37## substituent in the 3-position, wherein R 1 is alkyl or alkenyl having 1 to about 12 carbon atoms, or a carbocyclic or heterocyclic group having about 5 to about 20 nuclear carbon and hetero atoms, said coumarin and said activator being present in an amount sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.

Claim 25

In a photopolymerizable composition comprising an addition-polymerizable compound containing ethylenic unsaturation, and a co-initiator composition comprising a carbonyl compound and a photopolymerization activator responsive in the presence of the photo-excited form of said carbonyl compound to form a free radical, said activator being selected from the group consisting of an amine other than a 3-ketocoumarin, an acetic acid derivative, a phosphine, a phosphite, a bismuthine, an arsine, a stibine, a sulfine acid or a sulfinic acid ester, a sulfone, a dicarbonyl, a ketone, a bi-imidazole, and a stannate; the improvement wherein said carbonyl compound is selected from the group consisting of 3-(2-benzofuroyl)-7-diethylaminocoumarin 3-(2-benzofuroyl)-7-(1-pyrrolidinyl)coumarin 7-dimethylamino-3-thenoylcoumarin 3-benzoyl-7-diethylaminocoumarin 3-(o-methoxybenzoyl)-7-diethylaminocoumarin 3-(p-dimethylaminobenzoyl)-7-diethylaminocoumarin 3,3'-carbonylbis(5,7-di-n-propoxycoumarin) 3,3'-carbonylbis(7-diethylaminocoumarin) 3-benzoyl-7-methoxycoumarin 7-diethylamino-3-[3-(2-thienyl)acryloyl]coumarin 3-(2-furoyl)-7-diethylaminocoumarin 3-(p-diethylaminocinnamoyl)-7-diethylaminocoumarin 7-methoxy-3-(3-pyridylcarbonyl)coumarin 3-benzoyl-5,7-di-n-propoxycoumarin 7-dimethylamino-3-[3-(2-thienyl)acryloyl]coumarin 9-(7-diethylamino-3-coumarinoyl)-1,2,4,5-tetrahydro-3H,6H,10H[1]benzopyrano[6,7,8-i,j]quinolizine-10-one 3-(p-cyanobenzoyl)-5,7-di-n-propoxycoumarin 9-(7-di-n-propylamino-3-coumarinoyl)-1,2,4,5-tetrahydro-3H,6H,10H[1]benzopyrano[6,7,8-i,j]quinolizine-10-one 9-(4-diethylaminocinnamoyl)-1,2,4,5-tetrahydro-3H,6H,10H[1]benzopyrano[6,7,8-i,j]quinolizine-10-one 9-[3-(2-thienyl)acryloyl]-1,2,4,5-tetrahydro-3H,6H,10H[1]benzopyrano[6,7,8-i,j]quinolizine-10-one 7-diethylamino-3-(4-dimethylaminocinnamylideneacetyl)coumarin 9-[3-(9-julolidyl)acryloyl]-1,2,4,5-tetrahydro-3H,6H,10H[1]benzopyrano[6,7,8-i,j]quinolizine-10-one

Claim 26

In a photopolymerizable composition comprising an addition-polymerizable compound containing ethylenic unsaturation, and a co-initiator composition comprising a carbonyl compound and a photopolymerization activator responsive in the presence of the photo-excited form of said carbonyl compound to form a free radical, said activator being selected from the group consisting of an amine other than a 3-ketocoumarin, an acetic acid derivative, a phosphine, a phosphite, a bismuthine, an arsine, a stibine, a sulfine acid or a sulfinic acid ester, a sulfone, a dicarbonyl, a ketone, a bi-imidazole, and a stannate; the improvement wherein said carbonyl compound is selected from the group consisting of 3-(2-benzofuroyl)-7-diethylaminocoumarin 3-(2-benzofuroyl)-7-(1-pyrrolidinyl)coumarin 7-dimethylamino-3-thenoylcoumarin 3-benzoyl-7-diethylaminocoumarin 3-(o-methoxybenzoyl)-7-diethylaminocoumarin 3-(p-dimethylaminobenzoyl)-7-diethylaminocoumarin 3,3'-carbonylbis(5,7-di-n-propoxycoumarin) 3,3'-carbonylbis(7-diethylaminocoumarin) 3-benzoyl-7-methoxycoumarin 7-diethylamino-3-[3-(2-thienyl)acryloyl]coumarin 3-(2-furoyl)-7-diethylaminocoumarin 3-(p-diethylaminocinnamoyl)-7-diethylaminocoumarin 7-methoxy-3-(3-pyridylcarbonyl)coumarin 3-benzoyl-5,7-di-n-propoxycoumarin 7-dimethylamino-3-[3-(2-thienyl)acryloyl]coumarin 9-(7-diethylamino-3-coumarinoyl)-1,2,4,5-tetrahydro-3H,6H,10H[1]benzopyrano[6,7,8-i,j]quinolizine-10-one 3-(p-cyanobenzoyl)-5,7-di-n-propoxycoumarin 9-(7-di-n-propylamino-3-coumarinoyl)-1,2,4,5-tetrahydro-3H,6H,10H[1]benzopyrano[6,7,8-i,j]quinolizine-10-one 9-(4-diethylaminocinnamoyl)-1,2,4,5-tetrahydro-3H,6H,10H[1]benzopyrano[6,7,8-i,j]quinolizine-10-one 9-[3-(2-thienyl)acryloyl]-1,2,4,5-tetrahydro-3H,6H,10H[1]benzopyrano[6,7,8-i,j]quinolizine-10-one 7-diethylamino-3-(4-dimethylaminocinnamylideneacetyl)coumarin 9-[3-(9-julolidyl)acryloyl]-1,2,4,5-tetrahydro-3H,6H,10H[1]benzopyrano[6,7,8-i,j]quinolizine-10-one

Claim 27

3'-carbonylbis(5,7-dibutoxycoumarin) 3,3'-carbonylbis(7-acetoxycoumarin) 5,7,7'-trimethoxy-3,3'-carbonylbiscoumarin 3-cinnamoyl-7-diethylaminocoumarin 7-diethylamino-3-(4-morpholinocinnamoyl)coumarin 7-diethylamino-3-(4-ethoxycinnamoyl)coumarin 3-(4-bromocinnamoyl)-7-diethylaminocoumarin 7-diethylamino-3-[3-(4-methoxy-1-naphthyl)acryoyl]-coumarin 7-diethylamino-3-cinnamylideneacetylcoumarin 9-[3-(2-thienyl)acryloyl]-1,2,4,5-tetrahydro-3H,6H,10H[1]benzopyrano[6,7,8-i,j]quinolizine-10-one 7-diethylamino-3-(3-fluorosulfonylbenzoyl)coumarin 3-(4-methoxybenzoyl)-5,7-di-n-propoxycoumarin 3-(4-nitrobenzoyl)-5,7-di-n-propoxycoumarin 3-(3-trifluoromethylbenzoyl)-5,7-di-n-propoxycoumarin 3-(4-cyanobenzoyl)-7-diethylaminocoumarin 3-benzoyl-5,7-dimethoxycoumarin 3-benzoyl-5,7-diethoxycoumarin 3-benzoyl-6-methoxycoumarin 3-benzoyl-8-ethoxycoumarin 3-benzoylbenzo[f]coumarin 5,7-diethoxy-3-(2-thenoyl)coumarin 3-(2-benzofuroyl)-5,7-diethoxycoumarin 3-benzoyl-7-hydroxycoumarin 7-acetoxy-3-benzoylcoumarin 7-methoxy-3-(4-methoxybenzoyl)coumarin 3-(4-fluorosulfonylbenzoyl)-7-methoxycoumarin 3-(4-ethoxycinnamoyl)-7-methoxycoumarin 3-benzoyl-7-dimethylaminocoumarin 3-benzoyl-7-diethylaminocoumarin 3-benzoyl-7-pyrrolidinylcoumarin 3-(4-iodobenzoyl)-7-dimethylaminocoumarin 3-(4-iodobenzoyl)-7-diethylaminocoumarin 7-dimethylamino-3-(4-dimethylaminobenzoyl)coumarin 7-diethylamino-3-(4-nitrobenzoyl)coumarin 7-diethylamino-3-(2-thenoyl)coumarin 7-pyrrolidinyl-3-(2-thenoyl)coumarin 7-dimethylamino-3-(2-furoyl)coumarin 7-diethylamino-3-(2-methoxybenzoyl)coumarin 3,3'-carbonylbiscoumarin 3,3'-carbonylbis(7-methoxycoumarin) 3,3'-carbonylbis(6-methoxycoumarin) 3,3'-carbonylbis(5,7-dimethoxycoumarin) 3,3'-carbonylbis(5,7-diethoxycoumarin) 3,3'-carbonylbis(5,7-di-isopropoxycoumarin); said coumarin and said activator being present in an amount sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.

Claim 28

3'-carbonylbis(5,7-dibutoxycoumarin) 3,3'-carbonylbis(7-acetoxycoumarin) 5,7,7'-trimethoxy-3,3'-carbonylbiscoumarin 3-cinnamoyl-7-diethylaminocoumarin 7-diethylamino-3-(4-morpholinocinnamoyl)coumarin 7-diethylamino-3-(4-ethoxycinnamoyl)coumarin 3-(4-bromocinnamoyl)-7-diethylaminocoumarin 7-diethylamino-3-[3-(4-methoxy-1-naphthyl)acryoyl]-coumarin 7-diethylamino-3-cinnamylideneacetylcoumarin 9-[3-(2-thienyl)acryloyl]-1,2,4,5-tetrahydro-3H,6H,10H[1]benzopyrano[6,7,8-i,j]quinolizine-10-one 7-diethylamino-3-(3-fluorosulfonylbenzoyl)coumarin 3-(4-methoxybenzoyl)-5,7-di-n-propoxycoumarin 3-(4-nitrobenzoyl)-5,7-di-n-propoxycoumarin 3-(3-trifluoromethylbenzoyl)-5,7-di-n-propoxycoumarin 3-(4-cyanobenzoyl)-7-diethylaminocoumarin 3-benzoyl-5,7-dimethoxycoumarin 3-benzoyl-5,7-diethoxycoumarin 3-benzoyl-6-methoxycoumarin 3-benzoyl-8-ethoxycoumarin 3-benzoylbenzo[f]coumarin 5,7-diethoxy-3-(2-thenoyl)coumarin 3-(2-benzofuroyl)-5,7-diethoxycoumarin 3-benzoyl-7-hydroxycoumarin 7-acetoxy-3-benzoylcoumarin 7-methoxy-3-(4-methoxybenzoyl)coumarin 3-(4-fluorosulfonylbenzoyl)-7-methoxycoumarin 3-(4-ethoxycinnamoyl)-7-methoxycoumarin 3-benzoyl-7-dimethylaminocoumarin 3-benzoyl-7-diethylaminocoumarin 3-benzoyl-7-pyrrolidinylcoumarin 3-(4-iodobenzoyl)-7-dimethylaminocoumarin 3-(4-iodobenzoyl)-7-diethylaminocoumarin 7-dimethylamino-3-(4-dimethylaminobenzoyl)coumarin 7-diethylamino-3-(4-nitrobenzoyl)coumarin 7-diethylamino-3-(2-thenoyl)coumarin 7-pyrrolidinyl-3-(2-thenoyl)coumarin 7-dimethylamino-3-(2-furoyl)coumarin 7-diethylamino-3-(2-methoxybenzoyl)coumarin 3,3'-carbonylbiscoumarin 3,3'-carbonylbis(7-methoxycoumarin) 3,3'-carbonylbis(6-methoxycoumarin) 3,3'-carbonylbis(5,7-dimethoxycoumarin) 3,3'-carbonylbis(5,7-diethoxycoumarin) 3,3'-carbonylbis(5,7-di-isopropoxycoumarin); said coumarin and said activator being present in an amount sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.

Claim 29

In a photopolymerizable element comprising a support and on the support a layer comprising an addition-polymerizable compound containing ethylenic unsaturation, and a co-initiator composition comprising a carbonyl compound and a photopolymerization activator responsive in the presence of the photo-excited form of said carbonyl compound to form a free radical, said activator being selected from the group consisting of an amine other than a 3-ketocoumarin, an acetic acid derivative, a phosphine, a phosphite, a bismuthine, an arsine, a stibine, a sulfinic acid, a sulfinic acid ester, a sulfone, a dicarbon yl, a ketone, a bi-imidazole, and a stannate; the improvement wherein said carbonyl compound is a coumarin having an absorption maximum between about 250 and about 550 nm and a ##STR38## substituent in the 3-position, wherein R 1 is alkyl or alkenyl having 1 to about 12 carbon atoms, or a carbocyclic or heterocyclic amine, having about 5 to about 20 nuclear carbon and hetero atoms, said coumarin and said activator being present in an amount sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.

Claim 30

In a photopolymerizable element comprising a support and on the support a layer comprising an addition-polymerizable compound containing ethylenic unsaturation, and a co-initiator composition comprising a carbonyl compound and a photopolymerization activator responsive in the presence of the photo-excited form of said carbonyl compound to form a free radical, said activator being selected from the group consisting of an amine other than a 3-ketocoumarin, an acetic acid derivative, a phosphine, a phosphite, a bismuthine, an arsine, a stibine, a sulfinic acid, a sulfinic acid ester, a sulfone, a dicarbon yl, a ketone, a bi-imidazole, and a stannate; the improvement wherein said carbonyl compound is a coumarin having an absorption maximum between about 250 and about 550 nm and a ##STR38## substituent in the 3-position, wherein R 1 is alkyl or alkenyl having 1 to about 12 carbon atoms, or a carbocyclic or heterocyclic amine, having about 5 to about 20 nuclear carbon and hetero atoms, said coumarin and said activator being present in an amount sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.

Claim 31

In a method of photopolymerizing a composition by exposing it to activating radiation, the composition comprising an addition-polymerizable compound containing ethylenic unsaturation and a co-initiator composition including a carbonyl compound and a photopolymerization activator responsive in the presence of the photo-excited form of said carbonyl compound to form a free radical, said activator being selected from the group consisting of an amine other than a 3-ketocoumarin, an acetic acid derivative, a phosphine, a phosphite, a bismuthine, an arsine, a stibine, a sulfinic acid, a sulfinic acid ester, a sulfone, a dicarbonyl, a ketone, a bi-imidazole, and a stannate; the improvement wherein said carbonyl compound is a coumarin having an absorption maximum between about 250 and about 550 nm and a ##STR39## substituent in the 3-position, wherein R 1 is alkyl or alkenyl having 1 to about 12 carbon atoms, or a carbocyclic or heterocyclic group having about 5 to about 20 nuclear carbon and hetero atoms, said coumarin and said activator being present in an amount sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.

Claim 32

In a method of photopolymerizing a composition by exposing it to activating radiation, the composition comprising an addition-polymerizable compound containing ethylenic unsaturation and a co-initiator composition including a carbonyl compound and a photopolymerization activator responsive in the presence of the photo-excited form of said carbonyl compound to form a free radical, said activator being selected from the group consisting of an amine other than a 3-ketocoumarin, an acetic acid derivative, a phosphine, a phosphite, a bismuthine, an arsine, a stibine, a sulfinic acid, a sulfinic acid ester, a sulfone, a dicarbonyl, a ketone, a bi-imidazole, and a stannate; the improvement wherein said carbonyl compound is a coumarin having an absorption maximum between about 250 and about 550 nm and a ##STR39## substituent in the 3-position, wherein R 1 is alkyl or alkenyl having 1 to about 12 carbon atoms, or a carbocyclic or heterocyclic group having about 5 to about 20 nuclear carbon and hetero atoms, said coumarin and said activator being present in an amount sufficient to provide, when the composition is coated, dried and exposed to a medium-pressure mercury light source, a speed which is at least about one-fifth that of the same composition coated, dried and exposed identically except with a co-initiator consisting of Michler's ketone and benzophenone.