Radiation curable resin composition and rapid three-dimensional imaging process using the same
First Claim
1. A liquid radiation curable resin comprising:
- (A) from about 0 to about 12 wt % of a cycloaliphatic epoxide having a linking ester group;
(B) from about 30 to about 65 wt % of one or more epoxy functional components, wherein element (B) is not the same as element (A);
(C) from about 10 to about 30 wt % of one or more oxetanes;
(D) from about 1 to about 10 wt % of one or more polyols;
(E) from about 2 to about 20 wt % of one or more radically curable (meth)acrylate components;
(F) from about 2 to about 12 wt % of one or more impact modifiers;
(G) from about 0.1 to about 8 wt % of one or more free radical photoinitiators; and
(H) from about 0.1 to about 8 wt % of one or more cationic photoinitiators;
wherein the one or more epoxy functional components other than (A) comprises from about 0.25 wt % to about 1.0 wt % of a mono-functional epoxy with an ethylhexyl chain; and
wherein the liquid radiation curable resin has a viscosity at 30°
C. of from about 200 cps to about 1300 cps.
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Accused Products
Abstract
The invention relates to a liquid radiation curable resin capable of curing into a solid upon irradiation comprising: (A) from about 0 to about 12 wt % of a cycloaliphatic epoxide having a linking ester group; (B) from about 30 to about 65 wt % of one or more epoxy functional components other than A; (C) from about 10 to about 30 wt % of one or more oxetanes; (D) from, about 1 to about 10 wt % of one or more polyols; (E) from about 2 to about 20 wt % of one or more radically curable (meth)acrylate components; (F) from about 2 to about 12 wt % of one or more impact modifiers; (G) from about 0.1 to about 8 wt % of one or more free radical photoinitiators; and (H) from about 0.1 to about 8 wt % of one or more cationic photoinitiators; wherein the liquid radiation curable resin has a viscosity at 30° C. of from about 600 cps to about 1300 cps.
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Citations
21 Claims
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1. A liquid radiation curable resin comprising:
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(A) from about 0 to about 12 wt % of a cycloaliphatic epoxide having a linking ester group; (B) from about 30 to about 65 wt % of one or more epoxy functional components, wherein element (B) is not the same as element (A); (C) from about 10 to about 30 wt % of one or more oxetanes; (D) from about 1 to about 10 wt % of one or more polyols; (E) from about 2 to about 20 wt % of one or more radically curable (meth)acrylate components; (F) from about 2 to about 12 wt % of one or more impact modifiers; (G) from about 0.1 to about 8 wt % of one or more free radical photoinitiators; and (H) from about 0.1 to about 8 wt % of one or more cationic photoinitiators; wherein the one or more epoxy functional components other than (A) comprises from about 0.25 wt % to about 1.0 wt % of a mono-functional epoxy with an ethylhexyl chain; and wherein the liquid radiation curable resin has a viscosity at 30°
C. of from about 200 cps to about 1300 cps.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
(2) providing a stereolithography machine; (3) coating a layer of a liquid radiation curable resin onto a surface; (4) exposing said layer imagewise to actinic radiation to form a first exposed imaged cross-section, wherein the radiation is of sufficient intensity and time to cause substantial curing of the layer in the exposed areas; (5) coating an additional layer of the liquid radiation curable resin onto the previously exposed imaged cross-section; (6) exposing said additional layer imagewise to actinic radiation to form an additional imaged cross-section, wherein the radiation is of sufficient intensity and time to cause substantial curing of the second layer in the exposed areas and to cause adhesion to the previously exposed imaged cross-section; and (7) repeating steps (5) and (6) a desired number of times to build up the three-dimensional article, wherein the liquid radiation curable resin is that of claim 1.
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19. A three-dimensional article made by a process of claim 18, after full cure, has a Young'"'"'s modulus of from about 2 GPa to about 3 GPa, a notched Izod impact strength of from about 0.30 J/cm to about 0.60 J/cm, a heat deflection temperature of from about 40°
- C. to about 65°
C., and a 24-hour water absorption value of from about 0.2 weight % to about 0.7 weight %.
- C. to about 65°
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20. A three-dimensional article made from the liquid radiation curable resin of claim 1.
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21. A three-dimensional article made from the liquid radiation curable resin of claim 1 that, after full cure,
has a Young'"'"'s modulus of from about 2 GPa to about 3 GPa, a notched Izod impact strength of from about 0.30 J/cm to about 0.60 J/cm, a heat deflection temperature of from about 40° - C. to about 65°
C., anda 24-hour water absorption value of from about 0.2 weight % to about 0.7 weight %.
- C. to about 65°
Specification