# US 10,370,533 B2 · Thermoplastic composition and laser-welded article > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,370,533 B2 - Document ID: US10370533B2 - Status: Granted - Kind: B2 - Application number: 15/307,945 - Filed: 2015-05-19 - Published: 2017-03-30 - Granted: 2019-08-06 - Earliest claimed: 2014-06-05 - Assignees: Sabic Global Technologies B.V. - Applicants: Sabic Global Technologies B.V. - Inventors: Tony Farrell - Web page: https://patentgrep.com/patent/US10370533B2 ## CPC - C08L 67/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence) - C08K 5/132: Phenols containing keto groups {, e.g. benzophenones} - C08K 5/3475: condensed with carbocyclic rings - C08K 5/3492: Triazines - C08L 69/00: Compositions of polycarbonates; Compositions of derivatives of polycarbonates - C08L 69/005: {Polyester-carbonates} - C08L 2201/08: Stabilised against heat, light or radiation or oxydation - 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 2205/03: containing three or more polymers in a blend - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) ## Abstract A composition includes specific amounts of an amorphous polycarbonate, a partially crystalline polyester, and an ultraviolet absorbing agent comprising a hydroxyaryl group and a hydrogen-bond accepting group. The ultraviolet absorbing agent has a lambda-max less than 400 nanometers. The composition excludes white pigments, and colorants having a lambda-max of 400 to 700 nanometers. The composition is useful for forming a near infrared laser-transmissive part in a laser welded article that further includes a near infrared laser-absorbing part. ## Claims ### Claim 1 A composition comprising: 20 to 79.95 weight percent of an amorphous polycarbonate produced via interfacial polymerization; 20 to 79.95 weight percent of a partially crystalline polyester comprising poly(butylene terephthalate), poly(ethylene terephthalate), poly(butylene terephthalate) copolymers, poly(ethylene terephthalate) copolymers, or a combination thereof; and 0.05 to 2 weight percent of an ultraviolet absorbing agent, wherein the ultraviolet absorbing agent comprises 2-(2-hydroxy-5-t-octylphenyl)benzotriazole, 2-hydroxy-4-octyloxybenzophenone, 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-[(hexyl)oxy]-phenol, or a combination thereof; wherein the composition excludes white pigments, and colorants having a lambda-max of 400 to 700 nanometers; wherein all weight percent values are based on the total weight of the composition, and wherein the amorphous polycarbonate has a terminal hydroxyaryl group content of less than or equal to 300 parts per million by weight and an internal hydroxyaryl group content of less than or equal to 150 parts per million by weight. ### Claim 2 (depends on 1) The composition of claim 1, wherein the composition comprises 0 to less than 5 weight percent of fillers. ### Claim 3 (depends on 1) The composition of claim 1, wherein the composition excludes polyestercarbonates. ### Claim 4 (depends on 1) The composition of claim 1, wherein the composition excludes polycarbonate-polysiloxane block copolymers. ### Claim 5 (depends on 1) The composition of claim 1, wherein the composition excludes impact modifiers. ### Claim 6 (depends on 1) The composition of claim 1, wherein the composition excludes any polymer other than the amorphous polycarbonate and the partially crystalline polyester. ### Claim 7 (depends on 1) The composition of claim 1, wherein the composition excludes flame retardants. ### Claim 8 (depends on 1) The composition of claim 1, wherein the ultraviolet absorbing agent further comprises 2-(2-hydroxy-3-t-butyl-5-methylphenyl)-5-chlorobenzotriazole, 2-(2-hydroxy-3,5-di-t-butylphenyl)benzotriazole, 2-(2-hydroxy-3,5-di-t-butylphenyl)-5-chlorobenzotriazole, 2-(2-hydroxy-3-sec-butyl-5-t-butylphenyl)benzotriazole, 2-(2-hydroxy-3,5-di-t-pentylphenyl)benzotriazole, 2-(2-hydroxy-3,5-di-(1-methyl-1-phenylethyl)phenyl)benzotriazole, or a combination thereof. ### Claim 9 (depends on 1) The composition of claim 1, wherein the amorphous polycarbonate comprises repeat units having the formula wherein at least 60 percent of the total number of R1 groups are aromatic. ### Claim 10 (depends on 9) The composition of claim 9, wherein R1 is the residue of a dihydroxy compound having the formula wherein n, p, and q are each independently 0, 1, 2, 3, or 4; Ra is independently at each occurrence halogen, or unsubstituted or substituted C1-10 hydrocarbyl; and Xa is a single bond, —O—, —S—, —S(O)—, —S(O)2—, —C(O)—, or C1-18 hydrocarbylene, which can be cyclic or acyclic, aromatic or non-aromatic, and can further comprise one or more heteroatoms selected from halogens, oxygen, nitrogen, sulfur, silicon, or phosphorous. ### Claim 11 (depends on 9) The composition of claim 9, wherein at least 90 percent of the total number of R1 groups have the formula ### Claim 12 (depends on 1) The composition of claim 1, wherein the partially crystalline polyester comprises poly(butylene terephthalate). ### Claim 13 (depends on 1) The composition of claim 1, wherein the amorphous polycarbonate comprises repeat units having the formula wherein at least 90 percent of the total number of R1 groups have the formula wherein the partially crystalline polyester component comprises poly(butylene terephthalate); wherein the composition comprises 40 to 59.8 weight percent of the amorphous polycarbonate, 40 to 59.8 weight percent of the partially crystalline polyester, and 0.2 to 0.8 weight percent of the ultraviolet absorbing agent; wherein the composition excludes fillers; wherein the composition excludes any polymer other than the amorphous polycarbonate and the partially crystalline polyester; and wherein the composition excludes flame retardant. ### Claim 14 A laser welded article comprising: a near infrared laser-transmissive part; and a near infrared laser-absorbing part; wherein the near infrared laser-transmissive part comprises a composition comprising 20 to 79.95 weight percent of an amorphous polycarbonate produced via interfacial polymerization; 20 to 79.95 weight percent of a partially crystalline polyester comprising poly(butylene terephthalate), poly(ethylene terephthalate), poly(butylene terephthalate) copolymers, poly(ethylene terephthalate) copolymers, or a combination thereof; 0.05 to 2 weight percent of an ultraviolet absorbing agent, wherein the ultraviolet absorbing agent comprises 2-(2-hydroxy-5-t-octylphenyl)benzotriazole, 2-hydroxy-4-octyloxybenzophenone, 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-[(hexyl)oxy]-phenol, or a combination thereof; wherein the composition excludes white pigments, and colorants having a lambda-max of 400 to 700 nanometers; wherein all weight percent values are based on the total weight of the composition; and wherein the amorphous polycarbonate has a terminal hydroxyaryl group content of less than or equal to 300 parts per million by weight and an internal hydroxyaryl group content of less than or equal to 150 parts per million by weight. ### Claim 15 (depends on 14) The laser welded article of claim 14, wherein the amorphous polycarbonate comprises repeat units having the formula wherein at least 90 percent of the total number of R1 groups have the formula wherein the partially crystalline polyester component comprises poly(butylene terephthalate); wherein the composition comprises 40 to 59.8 weight percent of the amorphous polycarbonate, 40 to 59.8 weight percent of the partially crystalline polyester, and 0.2 to 0.8 weight percent of the ultraviolet absorbing agent; wherein the composition excludes fillers; wherein the composition excludes any polymer other than the amorphous polycarbonate and the partially crystalline polyester; and wherein the composition excludes flame retardant.