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US 10,370,533 B2Granted
Thermoplastic composition and laser-welded article
AssigneeSabic Global Technologies B.V.
InventorTony Farrell
Life of this patent
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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.
Claims15
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.
4 more elements
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.
8 more elements
Dependencies are inferred from the claim text.