Stereolithography using vinyl ether-epoxide polymers
First Claim
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1. A polymer precursor composition for forming three-dimensional objects by stereolithography consisting essentially of(a) vinyl ether functionalized compounds;
- (b) epoxy functionalized compounds;
(c) an effective amount of a cationic photoinitiator;
said vinyl ether compounds and epoxy compounds both being curable by acids released by said photoinitiator and having proportions selected to provide a three-dimensional polymeric object having suitable green strength with minimal curl distortion when said composition is polymerized in stereolithography by a light source selected from the group consisting of UV and visible light lasers and defined by the formula M=F/E whereM is the vinyl ether equivalent weight of the composition and has a value between 80 and 800F is the total weight in grams of the compositionE is the number of vinyl ether equivalents in the composition.
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Abstract
Polymer precursor formulations suitable for stereolithography may be prepared from compositions containing vinyl ether functionalized compounds and epoxy functionalized compounds plus an effective amount of a cationic photoinitiator.
67 Citations
22 Claims
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1. A polymer precursor composition for forming three-dimensional objects by stereolithography consisting essentially of
(a) vinyl ether functionalized compounds; -
(b) epoxy functionalized compounds; (c) an effective amount of a cationic photoinitiator;
said vinyl ether compounds and epoxy compounds both being curable by acids released by said photoinitiator and having proportions selected to provide a three-dimensional polymeric object having suitable green strength with minimal curl distortion when said composition is polymerized in stereolithography by a light source selected from the group consisting of UV and visible light lasers and defined by the formula M=F/Ewhere M is the vinyl ether equivalent weight of the composition and has a value between 80 and 800 F is the total weight in grams of the composition E is the number of vinyl ether equivalents in the composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
- 4. The composition of claim 3 wherein said vinyl ether oligomers are derived from a urethane obtained by reacting
(i) an hydroxyl terminated polyester having the formula ##STR14## where X and Y are divalent radicals having a molecular weight of 28 to about 500 and selected from the group consisting of alkylene, arylene, aralkylene, and cycloalkylene radicals m has an average value of 1 to about 100 and (ii) a diisocyanate having the formula - space="preserve" listing-type="equation">OCN--Q--NCO
where Q is a divalent radical selected from the group consisting of alkylene, arylene, aralkylene, and cycloalkylene radicals or a polyisocyanate having a functionality greater than 2 and (iii) a hydroxy monovinyl ether having the formula
space="preserve" listing-type="equation">R'"'"'CH═
CR"O--Z--OHwhere R'"'"' and R" are mono valent radicals selected from the group consisting of H and alkyl groups having 1-10 carbon atoms Z is a divalent radical having a molecular weight of 28 to about 250 and selected from the group consisting of alkylene, cycloalkylene, or polyalkylene ether radicals.
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- 5. The composition of claim 3 wherein said vinyl ether oligomers are derived from a urethane obtained by reacting
(i) an hydroxyl terminated polyether having the formula - space="preserve" listing-type="equation">HO--X--(--O--X).sub.m --OH
where m has an average value of 1 to about 100 X is a divalent radical having a molecular weight of 28 to about 500 and selected from the group consisting of alkylene, arylene, aralkylene, and cycloalkylene radicals and (ii) a diisocyanate having the formula
space="preserve" listing-type="equation">OCN--Q--NCOwhere Q is a divalent radical selected from the group consisting of alkylene, arylene, aralkylene, and cycloalkylene radicals or a polyisocyanate having a functionality greater than 2 and (iii) a hydroxy monovinyl ether having the formula
space="preserve" listing-type="equation">R'"'"'CH═
CR"O--Z--OHwhere R'"'"' and R" are mono valent radicals selected from the group consisting of H and alkyl groups having 1-10 carbon atoms Z is a divalent radical having a molecular weight of 28 to about 250 and selected from the group consisting of alkylene, cycloalkylene, or polyalkylene ether radicals.
- space="preserve" listing-type="equation">R'"'"'CH═
CR"OZOH
- space="preserve" listing-type="equation">(R'"'"'CH═
CR'"'"'--0--Z--).sub.n --A'"'"'
- space="preserve" listing-type="equation">(R'"'"'CH═
CR"--O--Z--O).sub.n --A"
- space="preserve" listing-type="equation">(R'"'"'CH═
CR"--0--Z).sub.n --B
- space="preserve" listing-type="equation">M.sub.2 --(--OZ--OCR"═
CHR'"'"').sub.n
- space="preserve" listing-type="equation">M.sub.3 --(--OZ--OCR"--CHR'"'"').sub.n
- space="preserve" listing-type="equation">(R'"'"'CH═
CR'"'"'--0--Z--).sub.n --A'"'"'
Specification