LASER-TRANSPARENT PBT WITH ORGANIC ADDITIVES

• US 20110306707A1
• Filed: 06/10/2011
• Published: 12/15/2011
• Est. Priority Date: 06/11/2010
• Status: Active Grant

• Current Assignee: BASF SE
• Original Assignee: BASF SE
• Inventors: Benten, Rebekka von, Eibeck, Peter, Heckmann, Walter, Kurikov, Jordan, Pulbere, Mariou Sorin
• Granted Patent: US 8,889,768 B2
• Time in Patent Office: Days
• US Class Current: 524/84
• CPC Class Codes: C08K 5/0008 Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
• CPC Class Codes: C08L 67/02 Polyesters derived from dicarboxylic acids and dihydroxy compounds C08L67/06 takes precedence

Abstract

Use of thermoplastic molding compositions comprising, as essential components,

• A) a polyester,
• B) from 20 to 200 mmol/kg of polyester A) of at least one compound of the general formula (I)

where
respectively independently at any position

• -A¹- is —NR—, —O—, —S—, —CH=A⁴- where R is H or C_1-6-alkyl, A⁴ is N or CH
• A² is COOX or OX, where X is Li, Na, K, Rb, Cs, Mg/2, Ca/2, Sr/2, Ba/2, Al/3
• A³ is C_1-6-alkyl, C_6-12-aryl, O_7-13-alkaryl, C_7-13-aralkyl, O—C_1-6-alkyl, O—C_6-12-aryl, O—C_7-13-alkaryl, O—C_7-13-aralkyl, COOX′, OX′, SX′, SO₃X′, where X′ is H or X, S—C_1-6-alkyl, S—C_6-12-aryl, NR₂, halogen, NO₂,
• n is an integer from 1 to 4, and
• m is an integer from 0 to 4−n, where m=1, if A³=NO₂,
  with the proviso that the number of mmol is based on the group(s) COOX and OX and SX′ where X′═X, to the extent that these are present in the compound of the general formula (I), and also moreover
• C) from 0 to 230% by weight of further added substances, based on the weight of component A),
  for producing laser-transparent moldings of any type.

Claims

1-12. -12. (canceled)

13. A laser-transparent molding of any type, comprising a thermoplastic molding compositions comprising,

A) a polyester,

B) from 20 to 200 mmol/kg of polyester A) of at least one compound of the general formula (I)

14. The molding according to claim 13, where the molding compositions comprise from 25 to 140 mmol/kg of polyester A of component B).

15. The molding according to claim 13, where the laser transparency of the molding is at least 33% (measured at 1064 nm on a molding of thickness 2 mm).

16. The molding according to claim 13, wherein n has the value 1 or 2, and m has the value 0 or 1 or 2.

17. The molding according to claim 16, wherein n has the value 1 and m has the value 0 or 1.

18. The molding according to claim 13, wherein X is Li, Na, K, Rb or Cs.

19. The molding according to claim 18, wherein X is Li, Na or K.

20. The molding according to claim 13, wherein A³ is C_1-6-alkyl, OX, SO₃X, halogen or NO₂.

21. The molding according to claim 13 obtained via laser transmission welding.

22. The moldings according to claim 13, wherein laser transmission welding is used to bond the laser-transparent moldings to laser-absorbent moldings.

23. A process for producing welded moldings, which comprises using laser transmission welding to bond laser-transparent moldings as defined in claim 13 to laser-absorbent moldings.

24. A welded molding obtainable according to the process of claim 23, which is suitable for applications in the electrical, electronic, telecommunications, information-technology, computer, household, sports, medical, motor-vehicle or entertainment sector.