Treated rubber and products made therefrom
AssigneeRyvec, Inc.
InventorPeter Kvesic
Life of this patent
Estimating the term…
Abstract
Treated rubber is made from ground rubber and a polyurethane resin. Products made by mixing treated rubber with additional polyurethane resin, molding and curing the polyurethane have higher tensile strengths and/or elongations than similar products made from untreated rubber. The method using treated rubber uses less polyurethane binder to produce products of equivalent strengths. The molding time is also reduced because of the reduced amount of polyurethane binder used.
Claims69
A method of making coated rubber particles comprising mixing rubber particles with a polyurethane resin until the resin is cured and the mixture is substantially free of large clumps.
A recycled rubber product comprising:
- a granulate of treated rubber particles and
- a polyurethane binder,
- wherein the granulate of treated rubber particles comprises rubber particles coated with a cured polyurethane resin, and wherein the granulate of treated rubber particles is substantially free of large clumps.
A method of making a recycled rubber product comprising:
- mixing a granulate of treated rubber particles with a polyurethane binder to form a rubber composite;
- forming a product from the rubber composite;
- and
- curing the product,
- wherein the granulate of treated rubber particles comprise rubber particles coated with a cured polyurethane resin, and wherein the granulate of treated rubber particles is substantially free of large clumps.
A granulate of treated rubber particles, wherein a treated rubber particle comprises a rubber particle coated with cured polyurethane resin, and wherein the polyurethane resin does not contain a dye or pigment, and wherein the granulate is substantially free of large clumps.
A granulate of treated rubber particles, wherein a treated rubber particle comprises a rubber particle coated with less than about 1% by weight of a cured polyurethane resin, wherein the granulate of treated rubber particles is substantially free of large clumps.
Dependencies are inferred from the claim text.