# US 2021/0277230 A1 · Polymer blends containing thermoplastic and cross-linked reaction product from polyaddition or polycondensation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0277230 A1 - Document ID: US20210277230A1 - Status: Published application - Kind: A1 - Application number: 17/261,288 - Filed: 2019-07-22 - Published: 2021-09-09 - Earliest claimed: 2018-07-25 - Assignees: Covestro Intellectual Property GmbH & Co. KG - Applicants: Covestro Intellectual Property GmbH & Co. KG - Inventors: Andreas Seidel; Mandy Gieler - Web page: https://patentgrep.com/patent/US20210277230A1 ## CPC - C08L 69/00: Compositions of polycarbonates; Compositions of derivatives of polycarbonates - C08L 2205/03: containing three or more polymers in a blend - C08L 2310/00: Masterbatches - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract The invention relates to a polymer blend of at least one thermoplastic component and a further crosslinked, polymeric component, in which this further component is formed in situ in an extruder or kneader during the melt compounding of the thermoplastic component(s) by polyaddition or polycondensation reaction of starting components containing functional groups. The invention also relates to a process for producing the polymer blend, to the use of the polymer blend for the production of shaped bodies and to the shaped bodies themselves. ## Claims ### Claim 1 A polymer blend comprising: A) a thermoplastic polymer selected from the group consisting of polycarbonates, polyester carbonates, polyesters and polyam ides, or a monophasic mixture of a plurality of thermoplastic polymers selected from the group consisting of polycarbonates, polyester carbonates, polyesters and polyam ides, B) optionally at least one further thermoplastic polymer which is different from component A and is not completely miscible with component A, C) 1 to 200 parts by weight, based on 100 parts by weight of component A, of a cross-linked or branched polymer, wherein component C is formed in situ in an extruder or kneader during the melt compounding of component A and optional further components in the presence of C.1 a first monomeric or oligomeric component comprising functional groups C.1.1 and C.2 a second monomeric or oligomeric component comprising functional groups C.2.1 which are different from C.1.1, by polyaddition or polycondensation in a reaction of the functional groups C.1.1 of component C.1 with the functional groups C.2.1 of component C.2, where components C.1 and C.2 are difunctional or higher-functionality compounds or are mixtures of one or more difunctional or higher-functionality compounds, and wherein at least one of components C.1 and C.2 comprises higher-functionality compounds. ### Claim 2 (depends on 1) The polymer blend of claim 1, wherein the functional groups C.1.1 and C.2.1 are selected from the group of reaction pairings consisting of epoxy groups and carboxyl groups, epoxy and hydroxyl groups, hydroxyl and carboxyl groups, isocyanate and hydroxyl groups, amino and carboxyl groups, amino and epoxy groups, amino and isocyanate groups, and anhydride and amino groups. ### Claim 3 (depends on 1) The polymer blend of claim 1, wherein component C.1 and component C.2 are homogeneously miscible with the melt of component A in the quantitative ratios used under the conditions of the melt compounding of component A and optional further components. ### Claim 4 (depends on 1) The polymer blend of claim 1, comprising: 1 to 99 parts by weight of component A, based on a total of 100 parts by weight of components A and B, 99 to 1 parts by weight of component B, based on a total of 100 parts by weight of components A and B, 1 to 200 parts by weight, based on 100 parts by weight of component A, of a polymer of component C, wherein component A and component B form separate phases in the polymer blend. ### Claim 5 (depends on 1) The polymer blend of claim 1, wherein component C forms a polymeric network which, in a temperature range below the decomposition temperatures of components A and C and also of optional component B, exchanges covalent bonds intramolecularly or intermolecularly in a dynamic manner. ### Claim 6 (depends on 1) The polymer blend of claim 1, comprising 10 to 50 parts by weight of component C, based on 100 parts by weight of component A. ### Claim 7 (depends on 1) The polymer blend of claim 1, wherein at least 40% by weight of the components of C.1 and C.2 used are converted to afford the polymer of component C. ### Claim 8 (depends on 1) The polymer blend of claim 1, further comprising as component D, 0.001 to 20 parts by weight, based on a total of 100 parts by weight of components A, B and C, of one or more polymer additives or processing auxiliaries. ### Claim 9 (depends on 8) The polymer blend of claim 8, wherein component D comprises a catalyst for the polycondensation or polyaddition reaction which leads to the formation of component C, the catalyst being selected from at least one representative of the group consisting of tin compounds, zinc compounds, zirconium compounds, samarium compounds, phosphonium salts and ammonium salts. ### Claim 10 (depends on 1) The polymer blend of claim 1, characterized in that component B is a polyolefin, a monophasic mixture of a plurality of miscible polyolefins or a monophasic mixture of a plurality of polymers comprising at least one polyolefin. ### Claim 11 (depends on 1) The polymer blend of claim 1, wherein component C is a crosslinked epoxy resin. ### Claim 12 (depends on 1) A process for producing a polymer blend of claim 1, comprising: (i) in a first process step at least one of the components C.1 and C.2 is physically premixed with component A, and (ii) in a second process step the premixture(s) produced in step (i) are melt compounded with addition of the remaining components and the polymer of component C is formed in the process by polyaddition or polycondensation and the final blend morphology is formed. ### Claim 13 (depends on 12) The process of claim 12, wherein in process step (i) first the components C.1 and C.2 and optionally further components are physically premixed together or separately with component A and in process step (ii), as component D, a catalyst for the polyaddition or polycondensation reaction of C.1 with C.2 is additionally added. ### Claim 14 (canceled) ### Claim 15 (depends on 1) A shaped body produced from a polymer blend of claim 1.