Nanoparticle Processing Aide For Extrusion And Injection Molding

• US 20130172464A1
• Filed: 08/31/2011
• Published: 07/04/2013
• Est. Priority Date: 09/20/2010
• Status: Abandoned Application

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Baran, Jimmie R. Jr., Ballard, William V., Fansler, Duane D., Gundel, Douglas B., Johnson, Michael A., Paff, Armin J.
• Application Number:
  US13/825,040
• Publication Number:
  US 20130172464A1
• Time in Patent Office: Days
• US Class Current: 524/264
• CPC Class Codes: B29C 45/0013 using fillers dispersed in the moulding material, e.g. metal particles
• CPC Class Codes: C08J 3/201 Pre-melted polymers
• CPC Class Codes: C08J 3/203 Solid polymers with solid and/or liquid additives
• CPC Class Codes: C08K 2201/011 Nanostructured additives
• CPC Class Codes: C08K 3/36 Silica
• CPC Class Codes: C08K 5/5419 containing at least one Si—C bond
• CPC Class Codes: C08K 5/5425 containing at least one C=C bond
• CPC Class Codes: C08K 9/06 with silicon-containing compounds

Abstract

Processing aides for extrusion and/or injection molding are described. In particular, nanoparticle processing aides, including surface-modified nanoparticle processing aides are described. Methods of using such nanoparticle processing aides in extrusion and injection molding processes are also described.

Claims

1. A method of processing a mixture in an extruder or injection molder, the method comprising melting a solid thermoplastic resin to form a molten resin, melt-mixing the molten resin and surface-modified nanoparticles to form the mixture, and extruding or injection molding the mixture, wherein the mixture comprises 0.5 to 10 wt. %, inclusive, of the surface-modified nanoparticles.

2. The method of claim 1, further comprising pre-mixing the solid thermoplastic resin and the surface modified nanoparticles prior to melting the solid thermoplastic resin.

3. The method of claim 1, wherein melting the solid thermoplastic resin and melt-mixing the molten resin and the surface modified nanoparticles occur within the extruder or injection molder.

4. The method according of claim 1, wherein at least one solid thermoplastic resin comprises a polyester resin.

5. The method of claim 4, wherein the polyester is a polyalkylene terephthalate.

6. The method of claim 5, wherein the polyalkylene terephthalate is selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, and polycyclohexylenedimethylene terephthalate.

7. The method of claim 1, wherein at least one solid thermoplastic resin comprises a polyamide.

8. The method of claim 7, wherein the polyamide is selected from the group consisting of polyamide 6, polyamide 66, and polyamide 6/69 copolymer,

9. The method of claim 1, wherein at least one solid thermoplastic resin comprises a polyalkylene.

10. The method of claim 9, wherein the polyalkylene comprises polypropylene.

11. The method of claim 1, wherein at least one solid thermoplastic resin comprises a liquid crystal polymer.

12. The method of claim 11, wherein the liquid crystal polymer comprises glass fibers.

13. The method of claim 1, wherein at least one solid thermoplastic resin comprises a polycarbonate.

14. The method of claim 1, wherein the resin further comprises at least one of pigments, fibers, and glass.

15. The method of claim 1, wherein the surface modified nanoparticles comprise silica nanoparticles comprising a silica core and a surface treatment agent covalently bonded to the core.

16. The method of claim 15, wherein at least one surface treatment agent is a trialkoxy alkylsilanes.

17. The method of claim 16, wherein the trialkoxy silane is selected from the group consisting of methyltrimethoxysilane, isooctyltrimethoxysilane, octadecyltrimethoxysilane, and combinations thereof.

18. The method of claim 15, wherein at least one surface treatment agent is vinyltrimethoxysilane.

21. An extruded article made according to the method of claim 1.

22. An injection molded article made according to the method of claim 1.

19. (canceled)

20. The method of claim 19, wherein the mixture comprises 0.5 to 5 wt. %, inclusive, of the surface-modified nanoparticles.