Provided herein are curable compositions for use in a high temperature lithography-based photopolymerization process, a method of producing crosslinked polymers using said curable compositions, crosslinked polymers thus produced, and orthodontic appliances comprising the crosslinked polymers.

The present invention relates to novel (per)fluoropolyether (PFPE) polymers, to a process for their manufacture and to their use as additives in coating compositions.

The present invention relates to novel (per)fluoropolyether (PFPE) polymers, to a process for their manufacture and to their use as additives in coating compositions.

The present invention provides a resin composition for stereolithography that enables easy stereolithographical fabrication; and that can produce a cured object having desirable strain recovery, desirable toughness, and desirable water resistance. The present invention relates to a resin composition for stereolithography comprising a polymerizable compound (A) whose homopolymer has a glass transition temperature (Tg) of 37° C. or higher; and a photopolymerization initiator (B), and having a tan δ at 37° C. of 0.3 or less after cure.

A resin composition comprises a base resin containing a urethane (meth)acrylate oligomer, a monomer and a photopolymerization initiator, and a hydrophobized spherical inorganic oxide, wherein the inorganic oxide is dispersed in the resin composition and a content of the inorganic oxide is 1 to 60% by mass based on a total amount of the resin composition.

A resin composition comprises a base resin containing a urethane (meth)acrylate oligomer, a monomer and a photopolymerization initiator, and a hydrophobized spherical inorganic oxide, wherein the inorganic oxide is dispersed in the resin composition and a content of the inorganic oxide is 1 to 60% by mass based on a total amount of the resin composition.

A film-forming thermoset coating composition includes: (a) an aqueous medium; and Option 1 and/or Option 2 as follows: Option 1: (b1) polyurethane-acrylate core-shell particles including a polymeric acrylic core at least partially encapsulated by a polymeric shell including urethane linkages, where the polymeric shell includes an acid functional group and two or more hydrazide functional groups, where the polymeric shell is covalently bonded to at least a portion of the polymeric core; and (c1) (i) formaldehyde; (ii) polyformaldehyde; and/or (iii) a compound that generates formaldehyde; Option 2: (b2) polyurethane-acrylate core-shell particles including a polymeric acrylic core at least partially encapsulated by a polymeric shell including urethane linkages, where the polymeric shell includes an acid functional group and two or more N-methylolated hydrazide functional groups, where the polymeric shell is covalently bonded to at least a portion of the polymeric core.

A film-forming thermoset coating composition includes: (a) an aqueous medium; and Option 1 and/or Option 2 as follows: Option 1: (b1) polyurethane-acrylate core-shell particles including a polymeric acrylic core at least partially encapsulated by a polymeric shell including urethane linkages, where the polymeric shell includes an acid functional group and two or more hydrazide functional groups, where the polymeric shell is covalently bonded to at least a portion of the polymeric core; and (c1) (i) formaldehyde; (ii) polyformaldehyde; and/or (iii) a compound that generates formaldehyde; Option 2: (b2) polyurethane-acrylate core-shell particles including a polymeric acrylic core at least partially encapsulated by a polymeric shell including urethane linkages, where the polymeric shell includes an acid functional group and two or more N-methylolated hydrazide functional groups, where the polymeric shell is covalently bonded to at least a portion of the polymeric core.

To produce a cured body excellent in strength, water resistance, and uniformity, provided is a method of producing a polyurethane-based composite material, including: a polyaddition reaction step of performing a polyaddition reaction in a first raw material composition containing a radically polymerizable monomer (B) free from causing a polyaddition reaction with any of a radically polymerizable diol compound (a1) and a diisocyanate compound (a2), to thereby form a polyurethane component (A) having a number average molecular weight of from 1,500 to 5,000; a second raw material composition-preparing step of preparing a second raw material composition containing the component A, the component B, a radical polymerization initiator, and a filler; and a radical polymerization step of performing radical polymerization using the second raw material composition after completion of the polyaddition reaction step and the second raw material composition-preparing step, wherein a ratio R represented by the following equation 1 is from 20 mass % to 80 mass %: Equation 1 R=100×B/[a1+a2+A+B], where a1, a2, A, and B represent the contents (parts by mass) of the component a1, the component a2, the component A, and the component B in the second raw material composition.

To produce a cured body excellent in strength, water resistance, and uniformity, provided is a method of producing a polyurethane-based composite material, including: a polyaddition reaction step of performing a polyaddition reaction in a first raw material composition containing a radically polymerizable monomer (B) free from causing a polyaddition reaction with any of a radically polymerizable diol compound (a1) and a diisocyanate compound (a2), to thereby form a polyurethane component (A) having a number average molecular weight of from 1,500 to 5,000; a second raw material composition-preparing step of preparing a second raw material composition containing the component A, the component B, a radical polymerization initiator, and a filler; and a radical polymerization step of performing radical polymerization using the second raw material composition after completion of the polyaddition reaction step and the second raw material composition-preparing step, wherein a ratio R represented by the following equation 1 is from 20 mass % to 80 mass %: Equation 1 R=100×B/[a1+a2+A+B], where a1, a2, A, and B represent the contents (parts by mass) of the component a1, the component a2, the component A, and the component B in the second raw material composition.