Photosensitive diacrylate and dimethacrylate compositions
First Claim
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1. A photosensitive composition comprising(a) 5-65% by weight of a compound of formula (Ia) or (Ib),
- wherein the substituents R1 are each independently of the other hydrogen or methyl,
R2 is an unsubstituted C1-C20alkyl group or a C1-C20 alkyl group which is substituted by one or more than one substituent selected from the group consisting of hydroxy, C6-C14aryl and halogen, an unsubstituted phenyl group or a phenyl group which is substituted by one or more than one substituent selected from the group consisting of C1-C6alkyl, hydroxy or halogen, or is a radical of formula —
CH2—
OR3, wherein R3 is an unsubstituted C1-C20alkyl group or a C1-C20alkyl group which is substituted by one or more than one substituent selected from the group consisting of hydroxy, C6-C14aryl and halogen, an unsubstituted phenyl group or a phenyl group which is substituted by one or more than one substituent selected from the group consisting of C1-C6alkyl, hydroxy and halogen, or is a C2-C6alkenyl group, a C2-C20acyl group or an unsubstituted cyclohexylcarbonyl group or a cyclohexylcarbonyl group which is substituted by one or more than one substituent selected from the group consisting of C1-C6alkyl, hydroxy and halogen, Z is a group of formulae (IIa)-(IIe) wherein Y is a direct bond, C1-C6alkylene, —
S—
, —
O—
, —
SO—
, —
SO2—
or —
CO—
, and R1 is hydrogen or methyl, and wherein the aromatic and cycloaliphatic rings of formulae (IIa)-(IIe) are unsubstituted or substituted by one or more than one substituent selected from the group consisting of C1-C6alkyl, chloro and bromo, (b) 15-70% by weight of one or more than one bifunctional acrylate or methacrylate having a molecular weight in the range from 150 to 450 and differing from the compound of formula (Ia) or (Ib), (c) 0-40% by weight of one or more than one monomeric polyfunctional acrylate or methacrylate having a functionality of not less than 3 and a molecular weight of not more than 600, (d) 0-10% by weight of at least one monofunctional acrylate or methacrylate, (e) 0-10% by weight of N-vinylpyrrolidone or N-vinylcaprolactam, (f) 2-10% by weight of at least one photoinitiator, and (g) 0-60% by weight of at least one urethane acrylate or methacrylate having a functionality of 2-4 and a molecular weight in the range from 500-10000.
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Abstract
A photosensitive composition of (a) a compound of formula (Ia) or (Ib) and (b) a bifunctional acrylate or methacrylate.
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Citations
11 Claims
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1. A photosensitive composition comprising
(a) 5-65% by weight of a compound of formula (Ia) or (Ib), - wherein the substituents R1 are each independently of the other hydrogen or methyl,
R2 is an unsubstituted C1-C20alkyl group or a C1-C20 alkyl group which is substituted by one or more than one substituent selected from the group consisting of hydroxy, C6-C14aryl and halogen, an unsubstituted phenyl group or a phenyl group which is substituted by one or more than one substituent selected from the group consisting of C1-C6alkyl, hydroxy or halogen, or is a radical of formula —
CH2—
OR3, wherein R3 is an unsubstituted C1-C20alkyl group or a C1-C20alkyl group which is substituted by one or more than one substituent selected from the group consisting of hydroxy, C6-C14aryl and halogen, an unsubstituted phenyl group or a phenyl group which is substituted by one or more than one substituent selected from the group consisting of C1-C6alkyl, hydroxy and halogen, or is a C2-C6alkenyl group, a C2-C20acyl group or an unsubstituted cyclohexylcarbonyl group or a cyclohexylcarbonyl group which is substituted by one or more than one substituent selected from the group consisting of C1-C6alkyl, hydroxy and halogen,Z is a group of formulae (IIa)-(IIe) wherein Y is a direct bond, C1-C6alkylene, —
S—
, —
O—
, —
SO—
, —
SO2—
or —
CO—
, and R1 is hydrogen or methyl, and wherein the aromatic and cycloaliphatic rings of formulae (IIa)-(IIe) are unsubstituted or substituted by one or more than one substituent selected from the group consisting of C1-C6alkyl, chloro and bromo,(b) 15-70% by weight of one or more than one bifunctional acrylate or methacrylate having a molecular weight in the range from 150 to 450 and differing from the compound of formula (Ia) or (Ib), (c) 0-40% by weight of one or more than one monomeric polyfunctional acrylate or methacrylate having a functionality of not less than 3 and a molecular weight of not more than 600, (d) 0-10% by weight of at least one monofunctional acrylate or methacrylate, (e) 0-10% by weight of N-vinylpyrrolidone or N-vinylcaprolactam, (f) 2-10% by weight of at least one photoinitiator, and (g) 0-60% by weight of at least one urethane acrylate or methacrylate having a functionality of 2-4 and a molecular weight in the range from 500-10000. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
irradiating the first layer over the entire first surface or in a predetermined pattern with a UV/VIS light source, such that within the irradiated areas a layer solidifies in a desired layer thickness, coating a new layer of the composition on the solidified layer, wherein the new layer has a second surface, irradiating the new layer over the entire second surface or in a predetermined pattern, and such that a three-dimensional object is formed from a plurality of solidified layers which adhere to one another by repeated coating and irradiation.
- wherein the substituents R1 are each independently of the other hydrogen or methyl,
Specification