USE OF POLYAMIDE 6 (PA6) AS A HEAT-AGING STABILIZER IN POLYMER COMPOSITIONS COMPRISING POLYPHENYLENE SULFIDE (PPS)

• US 20190309165A1
• Filed: 12/01/2017
• Published: 10/10/2019
• Est. Priority Date: 12/02/2016
• Status: Active Grant

• Current Assignee: Solvay Speciality Polymers Usa, LLC
• Original Assignee: Solvay Specialty Polymers USA, LLC (Solvac SA)
• Inventors: JEOL, Stephane, WARD, Christopher, LEO, Vito
• Granted Patent: US 11,174,387 B2
• Time in Patent Office: Days
• CPC Class Codes: C08J 3/22 using masterbatch techniques
• CPC Class Codes: C08K 13/06 Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
• CPC Class Codes: C08K 2201/019 the composition being defined by the absence of a certain additive
• CPC Class Codes: C08K 5/00 Use of organic ingredients
• CPC Class Codes: C08K 5/005 Stabilisers against oxidation, heat, light, ozone
• CPC Class Codes: C08K 7/14 Glass
• CPC Class Codes: C08K 9/00 Use of pretreated ingredients
• CPC Class Codes: C08L 77/02 Polyamides derived from omega-amino carboxylic acids or from lactams thereof C08L77/10 takes precedence
• CPC Class Codes: C08L 77/06 Polyamides derived from polyamines and polycarboxylic acids C08L77/10 takes precedence
• CPC Class Codes: C08L 77/10 Polyamides derived from aromatically bound amino and carboxyl groups of amino-carboxylic acids or of polyamines and polycarboxylic acids
• CPC Class Codes: C08L 81/02 Polythioethers; Polythioether-ethers
• CPC Class Codes: C08L 81/04 Polysulfides

Abstract

The present invention relates to a polymer composition comprising polyphenylene sulphide (PPS), polyamide 6 (PA6), reinforcing agents, wherein the weight ratio of PPS/PA6 is at least 2, with the proviso that the composition does not comprise an elastomer or comprises an elastomer in an amount not exceeding 1 wt. %. The present invention also relates to articles incorporating the polymer composition and the use of polyamide 6 (PA6) as a heat-aging stabilizer in a polymer composition.

Claims

1-12. -12:

(canceled)

13. A polymer composition comprising:

35 to 70 wt. % of a polyphenylene sulfide (PPS),

5 to 15 wt. % of polyamide 6 (PA6),

25 to 60 wt. % of reinforcing agents,

0 to 5 wt. % of an optional component selected from the group consisting of plasticizers, colorants, pigments, antistatic agents, dyes, lubricants, thermal stabilizers, light stabilizers, flame retardants, nucleating agents and antioxidants, wherein the weight ratio PPS/PA6 is at least 2,

with the proviso that the composition does not comprise an elastomer or comprises an elastomer in an amount not exceeding 1 wt. %,

wherein wt. % are based on the total weight of the composition.

14. The polymer composition of claim 13, wherein the PPS comprises at least about 50 mol. % of recurring units (R_PPS) of formula (L):

15. The polymer composition of claim 13, wherein the PA6 comprises at least about 50 mol. % of recurring units (R_PA6) of formula (N):

—

NH—

(CH₂)₅—

CO—

wherein mol. % is based on the total number of moles in the PA6.

16. The polymer composition of claim 13, wherein the weight ratio of PPS/PA6 is at least 3.

17. A method of making the polymer composition of claim 13, wherein the method comprises melt-blending PPS, PA6, and the reinforcing agents, and optionally any other components or additives.

18. An article comprising the polymer composition of claim 13.

19. The article of claim 18, wherein the article is a film, a laminate, an automotive part, an engine part, an electrical part, or an electronic part.

25. The polymer composition of claim 13, wherein the weight ratio of PPS/PA6 is at least 4.

26. The polymer composition of claim 13, wherein the weight ratio of PPS/PA6 is at least 5.

20. A method of heat-stabilizing a polymer composition comprising adding polyamide 6 (PA6) as a heat-aging stabilizer in the polymer composition

21. The method of claim 20, wherein the polymer composition comprises:

35 to 70 wt. % of a polyphenylene sulfide (PPS),

25 to 60 wt. % of reinforcing agents,

0 to 5 wt. % of an optional component selected from the group consisting of plasticizers, colorants, pigments, antistatic agents, dyes, lubricants, thermal stabilizers, light stabilizers, flame retardants, nucleating agents and antioxidants, with the proviso that the composition either does not comprise an elastomer or comprises an elastomer in an amount not exceeding 1 wt. %,

wherein wt. % are based on the total weight of the composition.

22. The method of claim 20, wherein the PA6 comprises at least about 50 mol. % of recurring units (R_PA6) of formula (N):

—

NH—

(CH₂)₅—

CO—

wherein mol. % is based on the total number of moles in the PA6.

23. The method of claim 20, wherein the PA6 in the composition ranges from 5 to 15 wt. %, based on the total weight of the composition.

24. The method of claim 20, wherein the weight ratio of PPS/PA6 is at least 3.

27. The method of claim 20, wherein the weight ratio of PPS/PA6 is at least 4.

28. The method of claim 20, wherein the weight ratio of PPS/PA6 is at least 5.