Thermosetting binder prepared with mono(hydroxyalkyl)urea and oxazolidone crosslinking agents
AssigneeNational Starch and Chemical Investment Holding Corporation
InventorsDavid R. Nass, Andrew J. Kielbania, Jr., Sharon P. Lee, Steven P. Pauls, Sr.
Life of this patent
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Abstract
Abrasive articles comprising a cured thermosetting binder and abrasive grains. The binder is prepared with a poly-functional molecule comprising at least two functional groups selected from the group consisting of carboxyl and anhydride, and a crosslinking agent which is selected from the group consisting of a mono(hydroxyalkyl)urea comprising a single urea group, a single hydroxyl group, and at least two carbon atoms disposed between the urea group and the hydroxyl group, and 2-oxazolidone. The abrasive articles comprise bonded, nonwoven or coated abrasive articles.
Claims36
An abrasive article comprising:
- (a) a plurality of abrasive grains;
- and
- (b) at least one binder for the abrasive grains,
- wherein said binder comprises a cured composition comprising a poly-functional molecule comprising at least two functional groups selected from the group consisting of carboxyl and anhydride, and a crosslinking agent which is selected from the group consisting of a mono(hydroxyalkyl)urea comprising a single urea group, a single hydroxyl group, and at least two carbon atoms disposed between the urea group and the hydroxyl group, and 2-oxazolidone, wherein the crosslinking agent is present in an amount effective to crosslink the poly-functional molecule.
A nonwoven abrasive article comprising a plurality of abrasive grains bonded into a nonwoven web by a binder, wherein said binder comprises a cured composition comprising a poly-functional molecule comprising at least two functional groups selected from the group consisting of carboxyl and anhydride, and a crosslinking agent which is selected from the group consisting of a mono(hydroxyalkyl)urea comprising a single urea group, a single hydroxyl group, and at least two carbon atoms disposed between the urea group and the hydroxyl group, and 2-oxazolidone, wherein the crosslinking agent is present in an amount effective to crosslink the poly-functional molecule.
A bonded abrasive article comprising a plurality of abrasive grains bonded together by a binder to form a shaped mass, wherein said binder comprises a cured composition comprising a poly-functional molecule comprising at least two functional groups selected from the group consisting of carboxyl and anhydride, and a crosslinking agent which is selected from the group consisting of a mono(hydroxyalkyl)urea comprising a single urea group, a single hydroxyl group, and at least two carbon atoms disposed between the urea group and the hydroxyl group, and 2-oxazolidone, wherein the crosslinking agent is present in an amount effective to crosslink the poly-functional molecule.
A coated abrasive article comprising:
- (i) a substrate having a front side and a back side;
- (ii) at least one layer of abrasive grains bonded to said front side of said substrate by means of a make coat;
- (iii) optionally one or more additional coats selected from the group consisting of a size coat, a supersize coat, a saturant coat, a presize coat, and a backsize coat;
- wherein at least one of said make, size, supersize, saturant, presize, and backsize coats comprises a cured binder composition comprising:
- a poly-functional molecule comprising at least two functional groups selected from the group consisting of carboxyl and anhydride, and a crosslinking agent which is selected from the group consisting of a mono(hydroxyalkyl)urea comprising a single urea group, a single hydroxyl group, and at least two carbon atoms disposed between the urea group and the hydroxyl group, and 2-oxazolidone, wherein the crosslinking agent is present in an amount effective to crosslink the poly-functional molecule.
An open low-density abrasive article, comprising in combination:
- (a) a lofty, open, nonwoven three-dimensional fibrous web comprising a plurality of interentangled randomly-extending polyamide staple fibers including points of intersection and contact between said fibers, said points of intersection and contact between said fibers being bonded together to form a three-dimensionally integrated structure throughout said web;
- (b) a plurality of abrasive particles dispersed throughout said web and securely adhered to said surface of said fibers;
- and
- (c) a cured thermosetting binder composition dispersed throughout said web, said binder composition comprising a poly-functional molecule comprising at least two functional groups selected from the group consisting of carboxyl and anhydride, and a crosslinking agent which is selected from the group consisting of a mono(hydroxyalkyl)urea comprising a single urea group, a single hydroxyl group, and at least two carbon atoms disposed between the urea group and the hydroxyl group, and 2-oxazolidone, wherein the crosslinking agent is present in an amount effective to crosslink the poly-functional molecule.
A casting core composition comprising:
- (a) refractory grains;
- and
- (b) at least one binder for the refractory grains,
- wherein said binder comprises a cured composition comprising a poly-functional molecule comprising at least two functional groups selected from the group consisting of carboxyl and anhydride, and a crosslinking agent which is selected from the group consisting of a mono(hydroxyalkyl)urea comprising a single urea group, a single hydroxyl group, and at least two carbon atoms disposed between the urea group and the hydroxyl group, and 2-oxazolidone, wherein the crosslinking agent is present in an amount effective to crosslink the poly-functional molecule.
A friction material comprising a base material and at least one binder, wherein said binder comprises a cured composition comprising a poly-functional molecule comprising at least two functional groups selected from the group consisting of carboxyl and anhydride, and a crosslinking agent which is selected from the group consisting of a mono(hydroxyalkyl)urea comprising a single urea group, a single hydroxyl group, and at least two carbon atoms disposed between the urea group and the hydroxyl group, and 2-oxazolidone, wherein the crosslinking agent is present in an amount effective to crosslink the poly-functional molecule.
A friction material comprising a porous fibrous base material formed from an aqueous paper slurry formulation having incorporated therein at least one silicone resin and at least one thermosetting resin, the silicone resin and thermosetting resin being dispersed throughout the fibrous base material such that the friction material exhibits high heat resistance and a substantially uniform coefficient of friction, wherein the thermosetting resin comprises a cured composition comprising a poly-functional molecule comprising at least two functional groups selected from the group consisting of carboxyl and anhydride, and a crosslinking agent which is selected from the group consisting of a mono(hydroxyalkyl)urea comprising a single urea group, a single hydroxyl group, and at least two carbon atoms disposed between the urea group and the hydroxyl group, and 2-oxazolidone, wherein the crosslinking agent is present in an amount effective to crosslink the poly-functional molecule.
A composition for use in making foundry molds and cores comprising a mixture of:
- (a) an aggregate;
- and
- (b) an aqueous solution of a resin comprising a poly-functional molecule comprising at least two functional groups selected from the group consisting of carboxyl and anhydride, and a crosslinking agent which is selected from the group consisting of a mono(hydroxyalkyl)urea comprising a single urea group, a single hydroxyl group, and at least two carbon atoms disposed between the urea group and the hydroxyl group, and 2-oxazolidone, wherein the crosslinking agent is present in an amount effective to crosslink the poly-functional molecule.
A grinding composition comprising:
- (i) a plurality of abrasive grains;
- and
- (ii) a resin comprising a poly-functional molecule comprising at least two functional groups selected from the group consisting of carboxyl and anhydride, and a crosslinking agent which is selected from the group consisting of a mono(hydroxyalkyl)urea comprising a single urea group, a single hydroxyl group, and at least two carbon atoms disposed between the urea group and the hydroxyl group, and 2-oxazolidone, wherein the crosslinking agent is present in an amount effective to crosslink the poly-functional molecule,
- wherein said grinding composition is formed by mixing said abrasive grains, said resin, and a catalyst and molding and curing said grinding composition.
An abrasive stone pad comprising:
- (i) a dispersed silicon carbide compound formed by mixing a diluent, silicon carbide and a dispersing agent;
- and
- (ii) a resin comprising a poly-functional molecule comprising at least two functional groups selected from the group consisting of carboxyl and anhydride, and a crosslinking agent which is selected from the group consisting of a mono(hydroxyalkyl)urea comprising a single urea group, a single hydroxyl group, and at least two carbon atoms disposed between the urea group and the hydroxyl group, and 2-oxazolidone, wherein the crosslinking agent is present in an amount effective to crosslink the poly-functional molecule,
- wherein said abrasive stone pad is formed by mixing said dispersed silicon carbide compound, said resin, and a catalyst and molding and curing said abrasive stone pad.
Dependencies are inferred from the claim text.