Colored thermoplastic resin compositions for laser welding, anthraquinone colorants therefor and molded product therfrom
View Patent ↗Thermoplastic resin compositions suitable for laser welding are described in which black colorants are added. These colorants constitute amine salt of anthraquinone dyes. Additional dyes, coloring agents, and a variety of other materials may be added. These compositions demonstrate outstanding mechanical and chemical properties once laser-welded.
1. A laser welded article, comprising:
a first molded article transparent to a laser beam, comprising a thermoplastic resin and a laser-transmitting black colorant comprising an amine salt of anthraquinone dye; and
a second molded article opaque to the laser beam, being laser welded to the first molded article.
2. A laser welded article according to claim 1 , wherein the amine salt of anthraquinone dye is formula [I] or formula [II],
wherein formula [I] is:
wherein R 1 to R 8 , which may be the same or different, are independently selected from the group consisting of H, alkyl, aryl, alkenyl, alkoxy, amino, hydroxy, halogen atom, acyl, acyloxy, acylamide, acyl-N-alkylamide, carboxyl, alkoxycarbonyl, cyclohexylamide, sulfonyl, formula [I-a], or —Y—W, and at least one of R 1 to R 8 is of formula [I-a]; wherein Y is S, O, or NH; wherein W is selected from alkyl group, alkenyl group, and aryl group; wherein (Z)n+ represents ammonium ion or a cation derived from an organic amine compounds or a basic dye; wherein n is 1 or 2, m1 is an integer from 1 to 4 and K1 is the ratio of m1/n;
and wherein formula [I-a] is:
wherein X is O or NH, and R 9 to R 13 , which may be the same or different, are independently selected from the group consisting of H, alkyl, aryl, alkenyl, alkoxy, amino, N-alkylamide, N-arylamide, hydroxy, halogen atom, acyl, acyloxy, acylamide, acyl-N-alkylamide, carboxyl, alkoxycarbonyl, or sulfonyl; wherein at least one of R 1 to R 8 and R 9 to R 13 is sulfonyl; and wherein formula [II] is:
wherein R 47 to R 52 , which may be the same or different, are independently selected from the group consisting of H, alkyl, aryl, alkenyl, alkoxy, amino, N-alkylamide, N-arylamide, hydroxy, halogen atom, acyl, acyloxy, acylamide, acyl-N-alkylamide, carboxyl, alkoxycarbonyl, or sulfonyl; and at least one of R 47 to R 52 is sulfonyl; and formula J in formula [II] is selected from formula [II-a] or formula [II-b] and binds two anthraquinone,
wherein formula [II-a] is:
and formula [II-b] is:
wherein R 53 to R 54 , which may be the same or different, are independently selected from the group consisting of alkyl (having 1 to 8 carbon atoms) or hydrogen; and
wherein (F)h+ represents ammonium ion or a cation derived from an organic amino compounds or a basic dye wherein h is 1 or 2, m4 is an integer from 1 to 4 and K4 is the ratio of m4/h.
3. A laser welded article according to claim 2 ,
wherein the amine salt of anthraquinone dye is formula [I], wherein R 2 , R 3 , R 5 , R 6 , R 7 , and R 8 are H; R 1 is of formula [I-a] wherein X is NH; R 9 , R 11 , and R 13 are CH 3 ; R 12 is —SO 3 − , , R 10 is H; and wherein (Z) n+ is H 3 N + (CH 2 ) 6 NH 2 wherein n is 1, m1 is an integer 2; K1 is 2.
4. A laser welded article according to claim 1 , wherein the first molded article further comprises a second dye.
5. A laser welded article according to claim 4 , wherein said second dyes is a perinone dye of formula [IV]:
wherein P is formula [IV-b] and Q is formula [IV-c]:
and wherein R 18 to R 29 is H, and m 6 is equal to 1.