Photosensitive compositions
First Claim
1. A photosensitive composition for production of a three-dimensional object by means of a stereolithographic process comprisinga) 5-95% by weight of a polyester of formula II or III ##STR10## wherein R1 is the radical of a cyclic anhydride of a dicarboxylic acid after removal of the --O--CO--O-- grouping, which radical may be substituted by C1 -C22 alkyl, C5 -C10 cycloalkyl, C3 -C6 alkenyl, C6 -C10 aryl, halogen or C1 -C22 alkyl which is interrupted by --O-- or --CO--O--,R2 is hydrogen, unsubstituted or halogen-substituted C1 -C22 alkyl, C5 -C10 cycloalkyl, C7 -C12 aralkyl, C6 -C10 aryl or a radical --CH2 --O--R5 or --CH2 --O--CO--R5, wherein R5 is C1 -C22 alkyl, C5 -C6 cycloalkyl or C6 -C10 aryl,R3 is hydrogen, orR2 and R3, together with the linking carbon atoms, are a cyclopentylene or cyclohexylene radical,R4 is a radical of 4 to 12 carbon atoms which carries an unsaturated end group and carboxyl or ether groups,wherein A in formulae II and III is a radical H3 C--(CH2)y --CO--O--, H3 C--(CH2)y --O--, --O--CO--(CH2)y --CO--O--, --O--(CH2)y --O-- or ##STR11## wherein R7 is methyl or hydrogen if m=1 or, if m=2-4, is hydrogen, n=2-150 and y is an integer from 2-20, or wherein A is derived from a linear or branched polyethylene glycol or polypropylene glycol or a copolymer of these two glycols or a carboxyl-terminated polyester,x is an integer from 0-100,n is an integer from 2-150, andz is an integer from 1-4,b) 10-90% by weight of a liquid polyfunctional aliphatic, cycloaliphatic or aromatic (meth)acrylate, which is a mixture of a di(meth)acrylate and a tri(meth)acrylate,c) 0-70% of a mono(meth)acrylate or mono-N-vinyl compound with a molecular weight of not more than 500,d) 0.1-10% by weight of a photoinitiator, ande) 0-10% by weight of optional customary additives.
16 Assignments
0 Petitions
Accused Products
Abstract
Photosensitive compositions comprising
a) 5-95% by weight of a polyester of formula I, II or III ##STR1## wherein R1 is the radical of a cyclic anhydride of a dicarboxylic acid after removal of the --O--CO--O-- grouping, which radical may be substituted by C1 -C22 alkyl, C5 -C10 cycloalkyl, C3 -C6 alkenyl, C6 -C10 aryl, halogen or C1 -C22 alkyl which is interrupted by --O-- or --CO--O--,
R2 is hydrogen, unsubstituted or halogen-substituted C1 -C22 alkyl, C5 -C10 cycloalkyl, C7 -C22 aralkyl, C6 -C10 aryl or a radical --CH2 --O--R5 or --CH2 --O--CO--R5, wherein R5 is C1 -C22 alkyl, C5 -C6 cycloalkyl or C6 -C10 aryl,
R3 is hydrogen, or
R2 and R3, together with the linking carbon atoms, are a cyclopentylene or cyclohexylene radical,
R4 is a radical of 4 to 12 carbon atoms which carries an unsaturated end group and carboxyl or ether groups,
A is a mono- or polyfunctional low molecular or high molecular carboxylate or alcoholate,
x is an integer from 0-100,
n is an integer from 2-150, and
z is an integer from 1-4,
b) 10-90% by weight of a liquid polyfunctional aliphatic, cycloaliphatic or aromatic (meth)acrylate,
c) 0-70% of a mono(meth)acrylate or mono-N-vinyl compound with a molecular weight of not more than 500,
d) 0.1-10% by weight of a photoinitiator, and
e) 0-10% by weight of optional customary additives.
8 Citations
15 Claims
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1. A photosensitive composition for production of a three-dimensional object by means of a stereolithographic process comprising
a) 5-95% by weight of a polyester of formula II or III ##STR10## wherein R1 is the radical of a cyclic anhydride of a dicarboxylic acid after removal of the --O--CO--O-- grouping, which radical may be substituted by C1 -C22 alkyl, C5 -C10 cycloalkyl, C3 -C6 alkenyl, C6 -C10 aryl, halogen or C1 -C22 alkyl which is interrupted by --O-- or --CO--O--, R2 is hydrogen, unsubstituted or halogen-substituted C1 -C22 alkyl, C5 -C10 cycloalkyl, C7 -C12 aralkyl, C6 -C10 aryl or a radical --CH2 --O--R5 or --CH2 --O--CO--R5, wherein R5 is C1 -C22 alkyl, C5 -C6 cycloalkyl or C6 -C10 aryl, R3 is hydrogen, or R2 and R3, together with the linking carbon atoms, are a cyclopentylene or cyclohexylene radical, R4 is a radical of 4 to 12 carbon atoms which carries an unsaturated end group and carboxyl or ether groups, wherein A in formulae II and III is a radical H3 C--(CH2)y --CO--O--, H3 C--(CH2)y --O--, --O--CO--(CH2)y --CO--O--, --O--(CH2)y --O-- or ##STR11## wherein R7 is methyl or hydrogen if m=1 or, if m=2-4, is hydrogen, n=2-150 and y is an integer from 2-20, or wherein A is derived from a linear or branched polyethylene glycol or polypropylene glycol or a copolymer of these two glycols or a carboxyl-terminated polyester, x is an integer from 0-100, n is an integer from 2-150, and z is an integer from 1-4, b) 10-90% by weight of a liquid polyfunctional aliphatic, cycloaliphatic or aromatic (meth)acrylate, which is a mixture of a di(meth)acrylate and a tri(meth)acrylate, c) 0-70% of a mono(meth)acrylate or mono-N-vinyl compound with a molecular weight of not more than 500, d) 0.1-10% by weight of a photoinitiator, and e) 0-10% by weight of optional customary additives.
Specification
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- Resources
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Current Assignee3D Systems, Inc. (3D Systems Corporation)
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Original AssigneeCiba-Geigy Corporation (Novartis Ag)
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InventorsSchulthess, Adrian, Hunziker, Max, Steinmann, Bettina
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Primary Examiner(s)Chapman, Mark A.
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Application NumberUS08/231,953Time in Patent Office649 DaysField of Search430/269, 430/270, 430/280, 430/281, 430/285, 522/107US Class Current430/269CPC Class CodesB33Y 70/00 Materials specially adapted...C08G 63/52 Polycarboxylic acids or pol...C08G 63/58 Cyclic ethers C08G59/00 tak...G03F 7/0037 Production of three-dimensi...G03F 7/032 with binders
