Abstract: An abrasive article comprises abrasive particles adhered to a substrate by a binder material. The binder material comprises an at least partially cured resole phenolic resin and an organic polymeric rheology modifier. The amount of the at least partially cured resole phenolic resin comprises 99.01 to 99.98 weight percent of the combined weight of the at least partially cured resole phenolic resin and the organic polymeric rheology modifier. Methods of making the abrasive article are also disclosed.

Abstract: A coated abrasive article comprises a backing having first and second opposed major surfaces, a make layer disposed on at least a portion of the first major surface and bonding abrasive particles to the backing, a size layer overlaid on at least a portion of the make layer and the abrasive particles, and a supersize layer disposed on the size layer. The supersize layer comprises an at least partially cured water-based epoxy resin and an organic polymeric rheology modifier, and wherein the amount of the at least partially cured epoxy resin comprises from 75 to 99.99 weight percent of the combined weight of the at least partially cured epoxy resin and the organic polymeric rheology modifier. A method of making the coated abrasive article is also disclosed.

Abstract: A coated abrasive article comprises a backing having first and second opposed major surfaces, a make layer disposed on at least a portion of the first major surface and bonding abrasive particles to the backing, a size layer overlaid on at least a portion of the make layer and the abrasive particles, and an optional supersize layer. At least one of the size layer or the optional supersize layer comprises an at least partially cured resole phenolic resin and an organic polymeric rheology modifier, and wherein the amount of the at least partially cured resole phenolic resin comprises from 75 to 99.99 weight percent of the combined weight of the at least partially cured resole phenolic resin and the organic polymeric rheology modifier. A method of making the coated abrasive article is also disclosed.

Abstract: A composition comprises a cyanoacrylate polymer and a protected amine. A method comprises: providing a shaped model comprising a cyanoacrylate polymer; preparing an investment having a cavity that corresponds to the shaped model; and heating the shaped model to sufficient temperature that the cyanoacrylate polymer depolymerizes and volatilizes. A hardenable material may be cast in the investment to provide a replica of the shaped model. A curable composition comprises: a cyanoacrylate monomer; a free-radical photoinitiator; and a protected amine, wherein the curable composition is free of compounds that initiate anionic polymerization of the cyanoacrylate monomer at ambient temperature. A method of curing the curable composition is also disclosed.

Abstract: An abrasive article comprises abrasive particles adhered to a substrate by a binder material. The binder material comprises an at least partially cured resole phenolic resin and an organic polymeric rheology modifier. The amount of the at least partially cured resole phenolic resin comprises from 75 to 99.99 weight percent of the combined weight of the at least partially cured resole phenolic resin and the organic polymeric rheology modifier. Methods of making the abrasive article are also disclosed.

Abstract: A catalyst for use with a phenolic resins which imparts accelerated curing at reduced temperatures. The catalyst is selected from elemental halogen or opium polyhalide compounds of the general formula: O+X(2n+1)?, where 1?n?4, Q is onium group, preferably selected from ammonium, sulfonium and phosphonium; and X is a halide. Each X may be the same or different and may include mixed halides such a X?Br2Cl or Cl2Br.

Abstract: A process of preparing polybenzoxazines using an alkylammonium salt of an acid having a pKa in acetonitrile of 9 or more as catalyst is described.

Abstract: A phenolic resin composition is described comprising at least 50 wt.-% of phenolic resin; first polymerized units comprising a cationic group; and second polymerized units comprising an anionic group. The cationic groups are ionically bonded to the anionic groups. The ionic bonding of the cationic group and anionic group of the polymerized units can provide certain complex viscosity and/or tan delta properties. In some embodiments, the phenolic resin composition has a complex viscosity at 65C of at least 50 Pascal(seconds) and/or has a tan delta at 65C ranging from 0.5 to 2.5. Abrasive articles and methods of making an abrasive article are also described.

Abstract: The disclosure provides a catalyst for use with a benzoxazine resins which imparts accelerated curing at reduced temperatures. The catalyst is selected from elemental halogen or onium polyhalide compounds.

Abstract: A resin blend is provided including a blend of a benzoxazine resin and a phthalonitrile resin. The benzoxazine/phthalonitrile resin blends prior to cure have more favorable processing and curing properties compared to the phthalonitrile resins alone, enabling greater ease in manufacturing.

Abstract: The disclosure provides a catalyst for use with a phenolic resins which imparts accelerated curing at reduced temperatures. The catalyst is selected from elemental halogen or onium polyhalide compounds.

Abstract: The disclosure provides a catalyst for use with a benzoxazine resins which imparts accelerated curing at reduced temperatures. The catalyst is selected from elemental halogen or onium polyhalide compounds.

Abstract: A resin blend is provided including a blend of a benzoxazine resin and a phthalonitrile resin. The benzoxazine/phthalonitrile resin blends prior to cure have more favorable processing and curing properties compared to the phthalonitrile resins alone, enabling greater ease in manufacturing.

Abstract: Poly(benzoxazine) polymer are prepared by heating a benzoxazine compound in the presence of a (meth)acrylate copolymer having pendent tosylate groups, resulting in an interpenetrating polymer network of a poly(benzoxazine) and a crosslinked (meth)acrylate copolymer.

Abstract: A curable benzoxazine composition is described wherein the benzoxazine is derived from an aryl amine having a b.p.>200° C. The curable compositions are more thermally stable and have reduced weight loss and by-products upon cure.

Abstract: A process of preparing polybenzoxazines using an alkylammonium salt of an acid having a pKa in acetonitrile of 9 or more as catalyst is described.

Abstract: A polymerizable composition is described comprising a benzoxazine, and a tosylate, which when thermolyzed, forms a (meth)acrylamide, a (meth)acrylate, a vinyl ketone, a vinyl ether or a styrenic compound.

Abstract: A process for preparing benzoxazine-thiol polymer film is described comprising forming a rolling bank of a curable composition comprising a polybenzoxazine and a polythiol, wherein the rolling bank contacts first and second carrier substrates; passing the first and second substrates with the curable composition therebetween through a nip; and at least partially curing the curable composition to provide the corresponding polymeric layer. The compositions are useful in coating, sealants, adhesive and many other applications.

Abstract: A curable benzoxazine composition is described wherein the benzoxazine is derived from an aryl amine having a b.p.>200° C. The curable compositions are more thermally stable and have reduced weight loss and by-products upon cure.

Abstract: Novel oligomers and polymers derived from the reaction of benzoxazine compounds with a mixture of epoxy compounds and amine compounds are disclosed. The compositions are useful in coating, sealants, adhesive and many other applications.