# US 7,745,007 B2 · Release sheets and methods of making the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,745,007 B2 - Document ID: US7745007B2 - Status: Granted - Kind: B2 - Application number: 11/590,218 - Filed: 2006-10-31 - Published: 2008-05-01 - Granted: 2010-06-29 - Earliest claimed: 2006-10-31 - Assignees: S.D. Warren Company - Inventors: Wayne L. Bilodeau - Web page: https://patentgrep.com/patent/US7745007B2 ## CPC - C09D 133/04: Homopolymers or copolymers of esters {(C09D143/04 takes precedence)} - C09J 7/40: characterised by release liners - C08G 61/12: Macromolecular compounds containing atoms other than carbon in the main chain of the macromolecule - C08G 2261/135: Cross-linked structures - C08G 2261/334: containing heteroatoms - C08G 2261/76: crosslinking - C08L 65/00: Compositions of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain (C08L7/00 - C08L57/00, C08L61/00 take precedence); Compositions of derivatives of such polymers - C09J 2401/006: in the substrate - C09J 2433/005: in the release coating - C09J 2433/006: in the substrate - C09J 2475/006: in the substrate - Y10T 428/269: including synthetic resin or polymer layer or component - Y10T 428/31551: Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.] - Y10T 428/31576: Ester monomer type [polyvinylacetate, etc.] - Y10T 428/31935: Ester, halide or nitrile of addition polymer - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H) - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Release sheets that can be used to manufacture artificial leather, paneling, and other products, as well as methods of making such release sheets are described. In general, the release sheets include a substrate and a release coating. The release coating is formed on the substrate by applying a crosslinkable material, such as an acrylic functional material, then crosslinking the material. An example of a release coating is the crosslinked reaction product of an acrylic functional material and a Michael donor. The release sheets have surfaces that can be replicated with high fidelity using a casting material, such as a urethane casting material. ## Claims ### Claim 1 A product comprising: a release sheet comprising a substrate and a coating extending from the substrate, the coating comprising a crosslinked polymeric material that is a crosslinked reaction product of an acrylic functional material and a Michael donor; and a cast sheet integral with the coating. ### Claim 2 (depends on 1) The product of claim 1, wherein the cast sheet is formed of a polyurethane. ### Claim 3 A product comprising: a release sheet comprising a substrate and a coating extending from the substrate, the coating comprising a crosslinked polymeric material that is a crosslinked reaction product of an acrylic functional material and a Michael donor, wherein the reaction product of the acrylic functional material and the Michael donor has a turbidity of less than 250 NTU, as measured using ASTM D5180; and a cast sheet integral with the coating. ### Claim 4 A release sheet comprising: a substrate; and a coating extending from the substrate, the coating comprising a crosslinked polymeric material that is a crosslinked reaction product of an acrylic functional material and a Michael donor, wherein a solvent-borne polyurethane material cast upon the coating and set has a peel resistance from the release sheet of less than about 275 g/1.5 in. ### Claim 5 (depends on 4) The release sheet of claim 4, wherein the peel resistance is less than 100 g/1.5 in. ### Claim 6 A product comprising: a release sheet comprising a substrate and a coating extending from the substrate, the coating comprising a crosslinked polymeric material that is a crosslinked reaction product of an acrylic functional material and a Michael donor, wherein a solvent-borne polyurethane material cast upon the coating and set has a peel resistance from the release sheet of less than 115 g/1.5 in, measured using a solvent-borne polyurethane material; and a cast sheet integral with the coating.