Liquid jet recording head

Claim 2

A liquid jet recording head comprising a cured product of an active energy-ray-curing resin composition at least a part of its constitution, said composition comprising: (A) a graft copolymerized polymer having a number average molecular weight of 5,000 or more and a weight average molecular weight of 50,000 or less which comprises a trunk chain composed mainly of structural units derived from at least one monomer selected from the group consisting of alkyl methacrylates, acrylonitrile and styrene and has graft chains having structural units derived from at least one monomer selected from the group consisting of the monomers represented by the following formula x and other monomers presented by the formula y: ##STR11## (wherein R 1 is hydrogen or an alkyl or hydroxyalkyl group having 1 to 3 carbon atoms, R 2 is hydrogen or an alkyl or acyl group having 1 to 4 carbon atoms which may have hydroxy group, R 3 is an alkyl group having 2 to 6 carbon atoms, a halogen-substituted alkyl group having 2 to 6 carbon atoms, alkylether group represented by the formula: -CH 2 ) n O-CH 2 ) m (wherein 2≦m+n≦6, n≠0 and m≠0), or a phenylalkyl group represented by the formula: ##STR12## (wherein 2≦m+n≦4, or the case where n=0 or m=0 is contained), added to said trunk chain; (B) a linear polymer having a number average molecular weight of 50,000 or more and a weight average molecular weight of 350,000 or less and having a glass transition temperature of 60° C. or more which comprises structural units derived from at least one monomer selected from the group consisting of methyl methacrylate, ethyl methacrylate, isobutyl methacrylate, t-butyl methacrylate, benzyl acrylate, tricyclodecaneacrylate, tricyclodecane methacrylate, acrylonitrile, isobornyl methacrylate, isobornyl methacrylate, tricyclodecaneoxyethyl methacrylate, styrene. dimethylaminoethyl methacrylate and cyclohexyl methacrylate and other structural units derived from at least one monomer selected from the group consisting of the monomers represented by said formula (x) and the monomers represented by said formula (y); (C) a resin esterificated at part of epoxy groups present in an epoxy resin containing at least one compound having two or more epoxy groups in one molecule with an unsaturated carboxylic acid; and (D) a polymerization initiator capable of generating a Lewis acid with irradiation of an active energy ray.

Claim 3

The recording head according to claim 1, wherein the weight ratio of said graft copolymerized polymer (A) to said linear polymer (B) is such that (A):(B) is in the range from 80:20 to 50:50.

Claim 4

The recording head according to claim 1 or 2, wherein the weight ratio of the sum weight of said graft copolymerized polymer (A) and said linear polymer (B) to said epoxy resin (C) is such that [(A)+(B)]:(C) is in the range from 100:50 to 100:200.

Claim 5

The recording head according to anyone of claims 1 to 3, wherein the weight ratio of the sum of said graft copolymerized polymer (A), said linear polymer (B) and said epoxy resin (C) to said polymerization initiator (D) is such that [(A)+(B)+(C)]:(D) is in the range from 100:1 to 100:10.

Claim 6

The recording head according to anyone of claims 1 to 4, wherein said polymerization initiator (D) comprises at least one compound selected from the group consisting of aromatic halonium salt compounds and aromatic onium salt compounds having photosensitivity containing an element belonging to group VIa or group Va of the periodic table.

Claim 7

The recording head according to claim 1, wherein said part is a member having formed a discharge opening for discharging ink.

Claim 8

The recording head according to claim 1, wherein said part is a member which defines a liquid path communicating with a discharge opening for discharging ink.

Claim 9

The recording head according to claim 7, wherein the member defining the liquid path is a liquid path wall.

Claim 10

The recording head according to claim 1, wherein said part is a member provided on a member which defines a liquid path communicating with a discharge opening for discharging ink.

Claim 11

The recording head according to claim 9, wherein the member provided is used as an adhesive layer.

Claim 12

The recording head according to claim 9, wherein the member provided is a flat plate.

Claim 13

The recording head according to claim 1, which comprises a discharge energy generating element.

Claim 14

The recording head according to claim 12, wherein the discharge energy generating element is a heat generating element.

Claim 15

The recording head according to claim 12, wherein the discharge energy generating element is a piezoelectric element.

Claim 16

The recording head according to claim 12, wherein a discharge opening for discharging ink is provided so as to oppose the discharge energy generating element.

Claim 17

A liquid jet recording apparatus comprising a liquid jet recording head having a discharge opening for discharging recording liquid, a driving circuit for driving said recording head and platen, said liquid jet recording head comprising a cured product of an active energy-ray-curing resin composition as at least a part of its constitution, said composition comprising: (A) a graft copolymerized polymer having a number average molecular weight of 5,000 or more and a weight average molecular weight of 50,000 or less which comprises a trunk chain composed mainly of structural units derived from at least one monomer selected from the group consisting of alkyl methacrylates, acrylonitrile and styrene and has graft chains having structural units derived from at least one monomer selected from the group consisting of the monomers represented by the following formula x and other monomers presented by the formula y: ##STR13## (wherein R 1 is hydrogen or an alkyl or hydroxyalkyl group having 1 to 3 carbon atoms. R 2 is hydrogen or an alkyl or acyl group having 1 to 4 carbon atoms which may have hydroxy group, R 3 is an alkyl group having 2 to 6 carbon atoms, a halogen-substituted alkyl group having 2 to 6 carbon atoms an alkylether group represented by the formula: -CH 2 ) n O-CH 2 ) m (wherein 2≦m+n≦6, n≠0 and m≠0), or a phenylalkyl group represented by the formula: ##STR14## (wherein 2≦m+n≦4, or the case where n=0 or m=0 is contained), added to said trunk chain; (B) a linear polymer having a number average molecular weight of 50,000 or more and a weight average molecular weight of 350,000 or less and having a glass transition temperature of 60° C. or more which comprises structural units derived from at least one monomer selected from the group consisting of methyl methacrylate ethyl methacrylate isobutyl methacrylate, t-butyl methacrylate benzyl methacrylate, acrylonitrile, isobornyl methacrylate, isobornyl acrylate, tricyclodecaneacrylate, tricyclodecane methacrylate, tricyclodecaneoxyethyl methacrylate, styrene, dimethylaminoethyl methacrylate and cyclohexyl methacrylate and other structural units derived from at least one monomer selected from the group consisting of the monomers represented by said formula (x) and the monomers represented by said formula (y); (C) a resin esterificated at part of epoxy groups present in an epoxy resin containing at least one compound having two or more epoxy groups in one molecule with an unsaturated carboxylic acid; and (D) a polymerization initiator capable of generating a Lewis acid with irradiation of an active energy ray.

Claim 18

A liquid jet recording apparatus comprising a liquid jet recording head having a discharge opening for discharging recording liquid, a driving circuit for driving said recording head and platen, said liquid jet recording head comprising a cured product of an active energy-ray-curing resin composition as at least a part of its constitution, said composition comprising: (A) a graft copolymerized polymer having a number average molecular weight of 5,000 or more and a weight average molecular weight of 50,000 or less which comprises a trunk chain composed mainly of structural units derived from at least one monomer selected from the group consisting of alkyl methacrylates, acrylonitrile and styrene and has graft chains having structural units derived from at least one monomer selected from the group consisting of the monomers represented by the following formula x and other monomers presented by the formula y: ##STR13## (wherein R 1 is hydrogen or an alkyl or hydroxyalkyl group having 1 to 3 carbon atoms. R 2 is hydrogen or an alkyl or acyl group having 1 to 4 carbon atoms which may have hydroxy group, R 3 is an alkyl group having 2 to 6 carbon atoms, a halogen-substituted alkyl group having 2 to 6 carbon atoms an alkylether group represented by the formula: -CH 2 ) n O-CH 2 ) m (wherein 2≦m+n≦6, n≠0 and m≠0), or a phenylalkyl group represented by the formula: ##STR14## (wherein 2≦m+n≦4, or the case where n=0 or m=0 is contained), added to said trunk chain; (B) a linear polymer having a number average molecular weight of 50,000 or more and a weight average molecular weight of 350,000 or less and having a glass transition temperature of 60° C. or more which comprises structural units derived from at least one monomer selected from the group consisting of methyl methacrylate ethyl methacrylate isobutyl methacrylate, t-butyl methacrylate benzyl methacrylate, acrylonitrile, isobornyl methacrylate, isobornyl acrylate, tricyclodecaneacrylate, tricyclodecane methacrylate, tricyclodecaneoxyethyl methacrylate, styrene, dimethylaminoethyl methacrylate and cyclohexyl methacrylate and other structural units derived from at least one monomer selected from the group consisting of the monomers represented by said formula (x) and the monomers represented by said formula (y); (C) a resin esterificated at part of epoxy groups present in an epoxy resin containing at least one compound having two or more epoxy groups in one molecule with an unsaturated carboxylic acid; and (D) a polymerization initiator capable of generating a Lewis acid with irradiation of an active energy ray.

Claim 19

The recording apparatus according to claim 16, wherein the weight ratio of said graft copolymerized polymer (A) to said linear polymer (B) is such that (A):(B) is in the range from 80:20 to 50:50.

Claim 20

The recording apparatus according to claim 16 or 17, wherein the weight ratio of the sum weight of said graft copolymerized polymer (A) and said linear polymer (B) to said epoxy resin (C) is such that [(A)+(B)]:(C) is in the range from 100:50 to 100:200.

Claim 21

The recording apparatus according to anyone of claims 16 to 18, wherein the weight ratio of the sum of said graftt copolymerized polymer (A), said linear polymer (B) and said epoxy resin (C) to said polymerization initiator (D) is such that [(A)+(B)+(C)]:(D) is in the range from 100:1 to 100:1.

Claim 22

The recording apparatus according to anyone of claims 16 to 19, wherein said polymerization initiator (D) comprises at least one compound selected from the group consisting of aromatic halonium salt compounds and aromatic onium salt compounds having photosensitivity containing an element belonging to group VIa or group Va of the periodic table.

Claim 23

The recording apparatus according to claim 16, wherein said part is a member having formed a discharge opening for discharging ink.

Claim 24

The recording apparatus according to claim 16, wherein said part is a member which defines a liquid path communicating with a discharge opening for discharging ink.

Claim 25

The recording apparatus according to claim 22, wherein the member defining the liquid path is a liquid path wall.

Claim 26

The recording apparatus according to claim 16, wherein said part is a member provided on a member which defines a liquid path communicating with a discharge opening for discharging ink.

Claim 27

The recording apparatus according to claim 24, wherein the member provided is used as an adhesive layer.

Claim 28

The recording apparatus according to claim 24, wherein the member provided is a flat plate.

Claim 29

The recording apparatus according to claim 16, which comprises a discharge energy generating element.

Claim 30

The recording apparatus according to claim 27, wherein the discharge energy generating element is a heat generating element.

Claim 31

The recording apparatus according to olaim 27, wherein the discharge energy generating element is a piezoelectric element.

Claim 32

The recording apparatus according to olaim 27, wherein the discharge energy generating element is a piezoelectric element.

Claim 33

The recording apparatus according to claim 27, wherein a discharge opening for discharging ink is provided so as to oppose the discharge energy generating element.