# US 2021/0277216 A1 · Thermoplastic molding compounds > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0277216 A1 - Document ID: US20210277216A1 - Status: Published application - Kind: A1 - Application number: 17/251,336 - Filed: 2019-07-24 - Published: 2021-09-09 - Earliest claimed: 2018-07-26 - Assignees: Clariant International Ltd. - Applicants: Clariant International Ltd - Inventors: Jeremia SCHWABE; Erik HAUCK; Simon BODENDORFER; Sebastijan BACH; Matthias ROESSLE; Torsten LINDNER; Robert TURNER; Christian NEU; Matthias MORAND; Gabriele STIEHL - Web page: https://patentgrep.com/patent/US20210277216A1 ## CPC - C08F 210/06: Propene - C08L 23/14: Copolymers of propene (C08L23/16 takes precedence) - C08F 210/16: Copolymers of ethene with alpha-alkenes, e.g. EP rubbers - C08L 23/12: Polypropene - C08L 23/16: Ethylene-propylene or ethylene-propylene-diene copolymers - C09J 123/14: Copolymers of propene (C09J123/16 takes precedence) - C08L 91/06: Waxes - C08L 2205/025: containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure - C08L 2205/035: containing four or more polymers in a blend - C08L 2314/06: Metallocene or single site catalysts - C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - 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) ## Abstract The invention relates to thermoplastic molding compounds having melt viscosities of less than 30,000 mPas for use as a hot-melt adhesive, comprising the components A and B, wherein component A comprises one or more C3/C2 copolymers each produced with metallocene catalysts and each having a melt viscosity at 170° C. of less than 20,000 mPas, measured according to DIN 53019, and a molecular weight MW of 1000 g/mol to 50,000 g/mol, and component B comprises one or more C2/C3 copolymers each produced with metallocene catalysts and each having a melt flow index MI of 1 to 100 g/min, measured at 190° C./2.16 kg, according to ASTM D 1238, and a molecular weight MW of 50,000 g/mol to 300,000 g/mol. Said thermoplastic molding compounds, because of the viscosity and mechanical properties thereof, are suitable for fiber mesh applications. ## Claims ### Claim 1 A thermoplastic molding material comprising the components A and B, wherein the thermoplastic molding material has a melt viscosity at 170° C. of less than 30 000 mPas, wherein the component A comprises one or more C3/C2-copolymers each of which have been produced with metallocene catalysts and have a melt viscosity at 170° C. of less than 20 000 mPas measured according to DIN 53019 and a molecular weight MW of 1000 g/mol to 50 000 g/mol, and the component B comprises one or more C2/C3-copolymers each of which have been produced with metallocene catalysts and have a melt index MI of 1 to 100 g/min measured at 190° C./2.16 kg according to ASTM D 1238 and a molecular weight MW of 50 000 g/mol to 300 000 g/mol. ### Claim 2 (depends on 1) The thermoplastic molding material as claimed in claim 1, wherein the thermoplastic molding material has a melt viscosity at 170° C. of 100 to 25 000 mPas, preferably 500 to 20 000 mPas, particularly preferably 1000 to 15 000 mPas, measured according to DIN 53019. ### Claim 3 (depends on 1) The thermoplastic molding material as claimed in claim 1, wherein the thermoplastic molding material has a strength of not less than 8 MPa measured according to ISO 527 save that a non-standard test specimen produced by hot melt pressing and differing from the test specimen conforming to the standard in terms of its dimensions was used. The test specimens used have the following dimensions: total length: 50 mm, width of narrow part: 3.3 mm, width at ends: 7 mm, length of narrow parallel part: 25 mm, thickness: 1 mm. ### Claim 4 (depends on 1) The thermoplastic molding material as claimed in claim 1, wherein the thermoplastic molding material has a breaking elongation of more than 1000% measured according to ISO 527 save for the test specimen used which has the following dimensions which deviate from the specification: total length: 50 mm, width of narrow part: 3.3 mm, width at ends: 7 mm, length of narrow parallel part: 25 mm, thickness: 1 mm. ### Claim 5 (depends on 1) The thermoplastic molding material as claimed in claim 1, wherein said material contains 2% by weight to 98% by weight, preferably 30% by weight to 95% by weight, particularly preferably 40% by weight to 90% by weight, based on the total weight of the thermoplastic molding material, of the component A and 2% by weight to 98% by weight, preferably 5% by weight to 70% by weight, preferably 10% by weight to 60% by weight, based on the total weight of the thermoplastic molding material, of the component B. ### Claim 6 (depends on 1) The thermoplastic molding material as claimed in claim 1, wherein component B is an elastomeric, semicrystalline C3/C2-copolymer having a proportion of propylene greater than 80% by weight. ### Claim 7 (depends on 1) The thermoplastic molding material as claimed in claim 1, wherein component A is a random copolymer of propylene derived from 70% to 95% by weight of propylene and from 5% to 30% by weight of ethylene. ### Claim 8 (depends on 1) The thermoplastic molding material as claimed in claim 1, wherein the component B has a melting enthalpy measured according to ISO 11357-2 of 0 to 50 J/g, preferably of 1 to 30 J/g, particularly preferably of 2 to 20 J/g. ### Claim 9 (depends on 1) The thermoplastic molding material as claimed in claim 1, wherein the component A has a weight-average molecular weight according to ISO 16014 of 1000 to 50 000 g/mol, preferably 5000 to 30 000 g/mol, and component B has a weight-average molecular weight according to ISO 16014 of 50 000 to 300 000 g/mol, preferably 70 000 to 150 000 g/mol. ### Claim 10 (depends on 1) The thermoplastic molding material as claimed in claim 1, wherein the component A has a melt viscosity at 170° C. measured according to DIN 53019 of 10 to 10 000 mPas, preferably 100 to 5000 mPas, and component B has a melt index at 190° C./2.16 kg measured according to ASTM D1238 of between 1 g/10 min and 50 g/10 min, preferably between 1 g/10 min and 30 g/10 min. ### Claim 11 (depends on 1) The thermoplastic molding material as claimed in claim 1, wherein component A has a breaking elongation less than 1000% measured according to ISO 527 save for the test specimen used and component B has a breaking elongation greater than 1000% measured according to ISO 527 save for the test specimen used which has the following dimensions: total length: 50 mm, width of narrow part: 3.3 mm, width at ends: 7 mm, length of narrow parallel part: 25 mm, thickness: 1 mm. ### Claim 12 (depends on 1) A hot melt adhesive containing a thermoplastic molding material as claimed in claim 1. ### Claim 13 (depends on 12) The hot melt adhesive as claimed in claim 12, wherein said adhesive contains no tackifiers or plasticizers. ### Claim 14 (depends on 12) The hot melt adhesive as claimed in claim 12, wherein said adhesive contains organic or inorganic pigments, fillers, flame retardants, stabilizers, antistats, antioxidants and light stabilizers. ### Claim 15 (depends on 1) A process for producing a thermoplastic molding material as claimed in claim 1 by mixing the components A and B. ### Claim 16 (depends on 1) The use of the thermoplastic molding material as claimed in claim 1 for bonding or affixing substrates. ### Claim 17 (depends on 16) The use of the thermoplastic molding material as claimed in claim 16, wherein the bonding is an affixing of fillers or granular or pulverulent materials on structured or textile substrates. ### Claim 18 (depends on 12) The use of the hot melt adhesive as claimed in claim 12 for bonding or affixing substrates. ### Claim 19 (depends on 18) The use of the hot melt adhesive as claimed in claim 18, wherein the bonding is an affixing of fillers or granular or pulverulent materials on structured or textile substrates.