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US 11,299,576 B2Granted
Sustainable chemistry systems for recyclable dental models and other additively manufactured products
AssigneeCarbon, Inc.
InventorsJustin Poelma, Mu San Zhang, Xinyu Gu, Jason P. Rolland, Joseph M. DeSimone
Life of this patent
Estimating the term…
Abstract
Provided herein are methods of recycling additively manufactured objects, which may include making a reactive particulate material by recycling preformed articles or recovered coating material. Methods of use of the reactive particulate material and material sets including the same are also provided.
Claims25
A method of making a reactive particulate material by recycling a preformed article or recovered coating material, comprising:
- (a) providing a preformed article, or recovered coating material, produced by a process of light polymerizing a single-cure resin in an additive manufacturing or coating process, wherein said resin is solely polymerized by light polymerization in said process, the resin comprising more than 90% by weight of:
- (i) a reactive blocked polyurethane prepolymer, a reactive blocked polyurea prepolymer, a reactive blocked polyurethane-polyurea copolymer, or a combination thereof, and (ii) optionally a monofunctional reactive diluent;
- wherein said resin further comprises:
- (iii) a photo-initiator,
- wherein said reactive blocked polyurethane prepolymer, reactive blocked polyurea prepolymer, reactive blocked polyurethane-polyurea copolymer, or combination thereof is blocked with a tertiary amine-containing (meth)acrylate selected from t-butylaminoethyl methacrylate (TBAEMA), tertiary pentylaminoethyl methacrylate (TPAEMA), tertiary hexylaminoethyl methacrylate (THAEMA), tertiary-butylaminopropyl methacrylate (TBAPMA), acrylate analogs thereof, and mixtures thereof, and
- wherein said resin does not include a chain extender for heat and/or microwave polymerization of a thermally reactive component of the reactive blocked polyurethane prepolymer, reactive blocked polyurea prepolymer, or reactive blocked polyurethane-polyurea copolymer;
- and then
- (b) comminuting said preformed article or coating material into a reactive particulate material.
5 more elements
A reactive particulate material produced by a process comprising:
- (a) providing a preformed article, or recovered coating material, produced by a process of light polymerizing a single-cure resin in an additive manufacturing or coating process, wherein said resin is solely polymerized by light polymerization in said process, the resin comprising more than 90% by weight of:
- (i) a reactive blocked polyurethane prepolymer, a reactive blocked polyurea prepolymer, a reactive blocked polyurethane-polyurea copolymer, or a combination thereof, and (ii) optionally a monofunctional reactive diluent;
- wherein said resin further comprises:
- (iii) a photo-initiator,
- wherein said reactive blocked polyurethane prepolymer, reactive blocked polyurea prepolymer, reactive blocked polyurethane-polyurea copolymer, or combination thereof is blocked with a tertiary amine-containing (meth)acrylate selected from t-butylaminoethyl methacrylate (TBAEMA), tertiary pentylaminoethyl methacrylate (TPAEMA), tertiary hexylaminoethyl methacrylate (THAEMA), tertiary-butylaminopropyl methacrylate (TBAPMA), acrylate analogs thereof, and mixtures thereof, and
- wherein said resin does not include a chain extender for heat and/or microwave polymerization of a thermally reactive component of the reactive blocked polyurethane prepolymer, reactive blocked polyurea prepolymer, or reactive blocked polyurethane-polyurea copolymer;
- and then
- (b) comminuting said preformed article or coating material into a particulate material,
- to thereby produce the reactive particulate material.
6 more elements
A method of making a recyclable preformed article, comprising:
- (a) providing a single-cure resin comprising more than 90% by weight of:
- (i) a reactive blocked polyurethane prepolymer, a reactive blocked polyurea prepolymer, a reactive blocked polyurethane-polyurea copolymer, or a combination thereof, and (ii) optionally a monofunctional reactive diluent;
- wherein said resin further comprises:
- (iii) a photo-initiator,
- wherein said reactive blocked polyurethane prepolymer, reactive blocked polyurea prepolymer, reactive blocked polyurethane-polyurea copolymer, or combination thereof is blocked with a tertiary amine-containing (meth)acrylate selected from t-butylaminoethyl methacrylate (TBAEMA), tertiary pentylaminoethyl methacrylate (TPAEMA), tertiary hexylaminoethyl methacrylate (THAEMA), tertiary-butylaminopropyl methacrylate (TBAPMA), acrylate analogs thereof, and mixtures thereof, and
- wherein said resin does not include a chain extender for heat and/or microwave polymerization of a thermally reactive component of the reactive blocked polyurethane prepolymer, reactive blocked polyurea prepolymer, or reactive blocked polyurethane-polyurea copolymer;
- and then
- (b) light polymerizing said resin in an additive manufacturing process to produce said preformed article, wherein said resin is solely polymerized by light polymerization in said process;
- and then
- (c) comminuting the preformed article, optionally wherein the comminuting step is carried out by grinding, shredding, chopping, or pelletizing.
7 more elements
Dependencies are inferred from the claim text.