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US 2010/0304100 A1Published application
Photocurable resin composition for producing three dimensional articles having high clarity
AssigneeHuntsman Advanced Materials Americas LLC
InventorJohn Wai Fong
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Abstract
The present invention provides a low viscosity photocurable composition including (i) a cationically curable component comprising a polyglycidyl epoxy compound (II) a free radically active component (iii) a cationic photoinitiator (v) a free radical photoinitiator and optionally (iv) one or more optional components. The photocurable composition can be cured using rapid prototyping techniques to form clear, colorless three-dimensional articles having excellent mechanical properties.
Claims22
A photocurable composition comprising:
- (a) 35-80% by weight of a cationically curable component comprising a polyglycidyl epoxy compound;
- (b) 5-60% by weight of a free radically active component comprising an ethoxylated and/or propoxylated poly(meth)acrylate;
- (c) 0.1-10% by weight of a antimony-free cationic photoinitiator;
- (d) 0.01-10% by weight of a free radical photoinitiator;
- and
- (e) 0-40% by weight of one or more optional components
- wherein the percent by weight is based on the total weight of the photocurable composition and wherein the photocurable composition, after cure, is clear and has a yellowness index/inch thickness of less than 70 and a flexural modulus of at least 1000 MPa.
4 more elements
A photocurable composition comprising:
- (a) 40-70% by weight of a cationically curable component comprising one or more epoxy-containing compounds and one or more oxetane compounds;
- (b) 15-60% by weight of a free radically active component comprising
- (i) at least one ethoxylated or propoxylated poly(meth)acrylate or mixture thereof and
- (ii) a non-aromatic poly(meth)acrylate;
- (c) 0.1-10% by weight of an antimony-free cationic photoinitiator;
- (d) 0, 1-10% by weight of a free radical photoinitiator;
- (e) 0-40% by weight of one or more optional components
- wherein the amount of the ethoxylated or propoxylated poly(meth)acrylate or mixture thereof is greater than 40% by weight of the total amount of free radically active component and wherein the photocurable composition, after cure by exposure to actinic radiation and optionally heat, has a yellowness index/inch thickness of less than 70.
5 more elements
A photocurable composition comprising:
- (a) 30-55% by weight of a cationically curable component comprising a hydrogenated aromatic polyglycidyl epoxy compound;
- (b) 5-60% by weight of a free radically active component comprising an ethoxylated and/or propoxylated poly(meth)acrylate;
- (c) 0.1-10% by weight of a antimony-free cationic photoinitiator;
- (d) 0.01-10% by weight of a free radical photoinitiator;
- and
- (e) 0-40% by weight of one or more optional components
- (f) 5-25% of an oxetane compound having one oxetane ring
- wherein the percent by weight is based on the total weight of the photocurable composition and wherein the photocurable composition has a C:H:O ratio of at least 3.0:3.75:1 and after cure, is clear and has a yellowness index/inch thickness of less than 70 and a flexural modulus of at least 1000 MPa.
5 more elements
Dependencies are inferred from the claim text.