# US 7,745,549 B2 · Distortional matrix of epoxy resin and diamine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,745,549 B2 - Document ID: US7745549B2 - Status: Granted - Kind: B2 - Application number: 11/613,667 - Filed: 2006-12-20 - Published: 2007-06-28 - Granted: 2010-06-29 - Earliest claimed: 2005-12-22 - Assignees: The Boeing Company - Inventors: Stephen Christensen; James S. Senger - Web page: https://patentgrep.com/patent/US7745549B2 ## CPC - C08G 59/3218: {Carbocyclic compounds} - C08G 59/5033: {aromatic} - C08G 59/504: {containing an atom other than nitrogen belonging to the amine group, carbon and hydrogen} - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS ## Abstract The invention relates to composites having increased distortional deformation, and/or decreased dilatation load, as expressed within the von Mises strain relationship, which provide increased von Mises strain results. These composites may provide enhanced composite mechanical performances. ## Claims ### Claim 1 A method of forming a composition having a von Mises strain of at least 0.300 by combining a mixture comprising at least one diamine and at least one epoxy resin which collectively have the von Mises strain of at least 0.300, the mixture comprising one of the following: (1) a Bisphenol F based tri-functional novolac epoxy resin and a 4,4′ bis (3-aminophenoxy) diphenylsulfone; (2) a Bisphenol F based tri-functional novolac epoxy resin and a 3,3 ′diaminodiphenylsulfone; (3) a Bisphenol F based tri-functional novolac epoxy resin and a 1,3 bis(3-aminophenoxy) benzene; (4) a diglycidyl α, α′-bis(4-hydroxyphenyl)-p-diisopropylbenzene and a 4,4′ bis (3-aminophenoxy) diphenylsulfone; (5) a 1,3 bis(4-aminophenoxy)-2,2 dimethylpropane and a diglycidyl ether of Bisphenol-A; and (6) a 1,3 bis(3-aminophenoxy)-2,2 dimethylpropane and a diglycidyl ether of Bisphenol-A. ### Claim 2 (depends on 1) The method of claim 1 wherein the von Mises strain of said formed composition is at least 0.400. ### Claim 3 (depends on 1) The method of claim 1 wherein the combining the mixture consisting of the at least one diamine and the at least one epoxy resin comprises combining the Bisphenol F based tri-functional novolac epoxy resin and the 3,3′diaminodiphenylsulfone. ### Claim 4 (depends on 3) The method of claim 3 wherein the von Mises strain of said formed composition ranges up to substantially 0.345 with the diamine weight percent content being 52%, wherein said at least one diamine comprises said 3,3′diaminodiphenylsulfone. ### Claim 5 (depends on 1) The method of claim 1 wherein the combining the mixture consisting of the at least one diamine and the at least one epoxy resin comprises combining the Bisphenol F based tri-functional novolac epoxy resin and the 4,4′bis (3-aminophenoxy) diphenylsulfone. ### Claim 6 (depends on 5) The method of claim 5 wherein the von Mises strain of the formed composition ranges from substantially 0.322 with a diamine weight percent content of substantially 41% to substantially 0.342 with the diamine weight percent content of substantially 65%, wherein said diamine comprises said 4,4′bis (3-aminophenoxy) diphenylsulfone. ### Claim 7 (depends on 6) The method of claim 6 wherein the substantially 41% diamine weight percent content composition comprises a substantially 1:1 stoichiometry ratio. ### Claim 8 (depends on 1) The method of claim 1 wherein the combining the mixture consisting of the at least one diamine and the at least one epoxy resin comprises combining the Bisphenol F based tri-functional novolac epoxy resin and the 1,3 bis(3-aminophenoxy) benzene. ### Claim 9 (depends on 8) The method of claim 8 wherein the von Mises strain of the formed composition ranges from substantially 0.313 with the diamine weight percent content of substantially 32% to substantially 0.37 with the diamine weight percent content of substantially 56%, wherein said at least one diamine comprises said 1,3 bis(3-aminophenoxy) benzene. ### Claim 10 (depends on 9) The method of claim 9 wherein the substantially 32% diamine weight percent content composition comprises a substantially 1:1 stoichiometry ratio. ### Claim 11 (depends on 1) The method of claim 1 wherein the combining the mixture consisting of the at least one diamine and the at least one epoxy resin comprises combining the diglycidyl α, α′-bis(4-hydroxyphenyl)-p-diisopropylbenzene and the 4,4′ bis (3-aminophenoxy) diphenylsulfone. ### Claim 12 (depends on 11) The method of claim 11 wherein the von Mises strain of the formed composition ranges from substantially 0.41 with a diamine weight percent content of substantially 24% to substantially 0.42 with the diamine weight percent content of substantially 32%, wherein said at least one diamine comprises said 4, 4′bis (3-aminophenoxy) diphenylsulfone. ### Claim 13 (depends on 12) The method of claim 12 wherein the substantially 32% diamine weight percent content composition comprises a substantially 1:1 stoichiometry ratio. ### Claim 14 (depends on 1) The method of claim 1 wherein the combining the mixture consisting of the at least one diamine and the at least one epoxy resin comprises combining the 1,3 bis(4-aminophenoxy)-2,2 dimethylpropane and the diglycidyl ether of Bisphenol-A. ### Claim 15 (depends on 14) The method of claim 14 wherein the combining the mixture consisting of the at least one diamine and the at least one epoxy resin comprises using a substantially 1:1 stoichiometric ratio of substantially 30% by weight of said 1,3 bis(4-aminophenoxy)-2,2 dimethylpropane substance with substantially 70% by weight of said diglycidyl ether of Bisphenol-A to yield the von Mises strain of substantially 0.31. ### Claim 16 (depends on 1) The method of claim 1 wherein the combining the mixture consisting of the at least one diamine and the at least one epoxy resin comprises combining the 1,3 bis(3-aminophenoxy)-2,2 dimethylpropane and the diglycidyl ether of Bisphenol-A. ### Claim 17 (depends on 16) The method of claim 16 wherein the combining the mixture consisting of the at least one diamine and the at least one epoxy resin comprises using a substantially 1:1 stoichiometric ratio of substantially 30% by weight of said 1,3 bis(3-aminophenoxy)-2,2 dimethylpropane substance with substantially 70% by weight of said diglycidyl ether of Bisphenol-A to yield the von Mises strain of substantially 0.32. ### Claim 18 (depends on 1) The method of claim 1 wherein the combining comprises combining the mixture consisting of one diamine and one epoxy resin from among the combinations of diamine and epoxy resin (1), (2), (3), (4), (5) or (6).