Resin composition and three dimensional object
AssigneesDsm N.V., Jsr Corporation, Japan Fine Coatings Co., Ltd.
InventorsTetsuya Yamamura, Takayoshi Tanabe, Takashi Ukachi
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Abstract
A photocurable resin composition suitable for use in three-dimensional photofabrication comprising (A) a cationically polymerizable organic compound, (B) a cationic photoinitiator, and (C) a (co)polymer obtainable by (co)polymerization of monomers comprising at least one (meth)acrylate-group comprising monomer. A process for producing a three-dimensional object which comprises the use of a washing agent having a Hansen-solubility between 27-35 (Mpa)1/2.
Claims17
A photocurable resin composition suitable for use in three-dimensional photofabrication comprising (A) a cationically polymerizable organic compound, (B) a cationic photoinitiator, and (C) a (co)polymer obtainable by (co)polymerization of monomers comprising at least one (meth)acrylate-group comprising monomer
2 The resin composition according to claim 1, wherein (A) is chosen from the group consisting of cyclohexeneoxide group-containing compounds and glycidyl group-containing compounds.
3 The resin composition according to anyone of claim 1 or 2, wherein (A) is chosen from the compounds 3,4-epoxycyclohexylmethyl-3′,4′-epoxycyclohexanecarboxylate and bis(3,4-epoxycyclohexylmethyl)adipate.
4 The resin composition according to anyone of claims 1-3, wherein (C) may be one or more of (co)polymers selected from (1) a homopolymer of a (meth)acrylate group containing monomer, (2) a copolymer made from two or more (meth)acrylates group containing monomers, and (3) a copolymer made from one or more (meth)acrylates group containing monomers and one or more other monomers copolymerizable with the (meth)acrylate group containing monomer.
5 The resin composition according to anyone of claims 1-4, wherein (C) is a copolymer from two or more (meth)acrylic acid alkyl esters.
6 The resin composition according to anyone of claims 1 6, wherein (C) is a copolymer of n-butyl acrylate and 2-ethylhexyl acrylate.
7 The resin composition according to anyone of claims 1-6, wherein (C) is a copolymer of n-butyl acrylate and 2-ethylhexyl acrylate, wherein the ratio of n-butyl acrylate to 2-ethylhexyl acrylate is from 70:30 to 90:10.
The resin composition according to claim 7, wherein the weight average molecular weight (Mw) of (C) is 2,000-20,000.
A photocurable resin composition suitable for use in stereolithography, wherein the resin composition contains between 0.3 and 1.5 wt % water.
A process for making three dimensional objects from successive layers of a photocurable composition comprising the steps of (a) forming a layer of photocurable resin composition;
- (b) curing at least a portion of the layer by exposure to radiation;
- (c) introducing a new layer of resin composition onto the layer previously exposed to the radiation;
- (d) repeating steps (b) and (c) until a three dimensional object is formed and (e) washing the object with a washing agent, whereby the washing agent satisfies two conditions:
- (I) the washing agent causes a test specimen, obtained by photocuring a liquid resin comprising 50 parts by weight of polypropylene glycol diacrylate shown by the following formula (A),
- 3
- wherein m+n is 7, 47 parts by weight of methoxytripropylene glycol acrylate shown by the following formula (B),
- 4
- and 3 parts by weight of 1-hydroxycyclohexyl phenyl ketone as a photoinitiator, to swell at a swelling rate of 10 wt % or less when immersed therein at 23° C. for 12 hours, and (II) the washing agent causes the liquid resin to be dissolved or dispersed therein when 5 ml of the liquid resin is added to 30 ml of the washing agent and shaken for one minute at ambient temperature.
A process for making three dimensional objects from successive layers of a photocurable composition comprising the steps of (a) forming a layer of photocurable resin composition;
- (b) curing at least a portion of the layer by exposure to radiation;
- (c) introducing a new layer of resin composition onto the layer previously exposed to the radiation;
- (d) repeating steps (b) and (c) until a three dimensional object is formed and (e) washing the object with a washing agent, whereby the washing agent comprises a compound of which the three-component Hansen solubility parameter is 27-35 (MPa)1/2.
A process for making three dimensional objects from successive layers of a photocurable composition comprising the steps of (a) forming a layer of photocurable resin composition;
- (b) curing at least a portion of the layer by exposure to radiation, (c) introducing a new layer of resin composition onto the layer previously exposed to the radiation;
- (d) repeating steps (b) and (c) until a three dimensional object is formed and (e) washing the object with a washing agent, whereby the washing agent comprises a compound shown by the formula:
- HO—(R6—-O)p-H
- wherein R6 represents an alkylene group having 1-10 carbon atoms and p is an integer from 1 to 20, excluding HOCH2OH.
Dependencies are inferred from the claim text.