Fibrillated polymer compositions and methods of their manufacture

Patent metadata

Field	Value
Publication number	US-11339263-B2
Application number	US-201916518068-A
Country	US
Kind code	B2
Filing date	Jul 22, 2019
Priority date	Mar 16, 2015
Publication date	May 24, 2022
Grant date	May 24, 2022

Abstract

The disclosure is directed to polymer compositions comprising a matrix polymer component comprising a crystalline or semi-crystalline polymer; and a fibrillated fluoropolymer, a fibrillated fluoropolymer encapsulated by an encapsulating polymer, or a combination thereof. Methods of preparing and using these polymer compositions, as well as articles comprising the polymer compositions, as also described.

First claim

What is claimed:

1. A polymer composition consisting of:
a matrix polymer component consisting of polypropylene, nylon, linear low-density polyethylene, low-density polyethylene, high density polyethylene, or a combination thereof; and
0.1 wt. % to 15 wt. %, based on the weight of the polymer composition, of a styrene-acrylonitrile copolymer encapsulated fibrillated polytetrafluoroethylene,
wherein the composition has a complex viscosity, measured at a 0.1 rad/sec, of between 4500 Pa·s and 70,000 Pa·s, measured at a temperature of between 230° C. and 260° C., and
wherein the composition has an extensional viscosity of between 11,000 and 90,000 Pa·s at a maximum Hencky strain of 2.0 at a strain rate of 1 s·1, measured at a temperature of between 230° C. and 260° C.

2. The polymer composition of claim 1 , wherein the matrix polymer component consists of polypropylene.

3. The polymer composition of claim 2 , wherein the polypropylene is a random polymer, a co-polymer, or a homopolymer.

4. The polymer composition of claim 1 , comprising 1 wt. % to 10 wt. %, based on the weight of the polymer composition, of the styrene-acrylonitrile copolymer encapsulated polytetrafluoroethylene.

5. The polymer composition of claim 1 , having a tensile modulus of greater than 2450 MPa to 3000 MPa.

6. The polymer composition of claim 1 , having a notched impacted strength of greater than 3.5 KJ/m2 to 10 KJ/m2.

7. An article consisting of the composition of claim 1 .

8. The article of claim 7 , produced using a process comprising foaming, sheet forming, or pipe extrusion.

9. A method comprising subjecting a polymer composition of claim 1 to a process comprising foaming, sheet forming, or pipe extrusion.

10. The polymer composition of claim 1 wherein the fibrillated polytetrafluoroethylene is characterized by a DSC peak around 330° C.

11. A polymer composition consisting of:
a matrix polymer component consisting of polypropylene, nylon, linear low-density polyethylene, low-density polyethylene, high density polyethylene, or a combination thereof;
0.1 wt. % to 15 wt. %, based on the weight of the polymer composition, of a styrene-acrylonitrile copolymer encapsulated fibrillated polytetrafluoroethylene; and
a colorant consisting of a dye,
wherein the composition has a complex viscosity, measured at a 0.1 rad/sec, of between 4500 Pa·s and 70,000 Pa·s, measured at a temperature of between 230° C. and 260° C., and
wherein the composition has an extensional viscosity of between 11,000 and 90,000 Pa·s at a maximum Hencky strain of 2.0 at a strain rate of 1 s·1, measured at a temperature of between 230° C. and 260° C.

12. The polymer composition of claim 11 , wherein the matrix polymer component consists of polypropylene.

13. The polymer composition of claim 12 , wherein the polypropylene is a random polymer, a co-polymer, or a homopolymer.

14. The polymer composition of claim 11 , comprising 1 wt. % to 10 wt. %, based on the weight of the polymer composition, of the styrene-acrylonitrile copolymer encapsulated polytetrafluoroethylene.

15. The polymer composition of claim 11 , having a tensile modulus of greater than 2450 MPa to 3000 MPa.

16. The polymer composition of claim 11 , having a notched impacted strength of greater than 3.5 KJ/m2 to 10 KJ/m2.

17. An article consisting of the composition of claim 11 , wherein the article is produced using a process comprising foaming, sheet forming, or pipe extrusion.

18. A method comprising subjecting a polymer composition of claim 11 to a process comprising foaming, sheet forming, or pipe extrusion.

19. The polymer composition of claim 11 , wherein the dye consists of at least one of: coumarin 460 (blue); coumarin 6 (green); nile red; lanthanide complex; hydrocarbon or substituted hydrocarbon dye; polycyclic aromatic hydrocarbon dye; oxazole dye; oxadiazole dye; aryl- or heteroaryl-substituted poly (C2-8) olefin dye; carbocyanine dye; indanthrone dye; phthalocyanine dye; oxazine dye; carbostyryl dye; napthalenetetracarboxylic acid dye; porphyrin dye; bis(styryl)biphenyl dye; acridine dye; anthraquinone dye; cyanine dye; methine dye; arylmethane dye; azo dye; indigoid dye; thioindigoid dye; diazonium dye; nitro dye; quinone imine dye; aminoketone dye; tetrazolium dye; thiazole dye; perylene dye; perinone dye; bis-benzoxazolylthiophene (BBOT); triarylmethane dye; xanthene dye; thioxanthene dye; naphthalimide dye; lactone dye; fluorophore; 7-amino-4-methylcoumarin; 3-(2′-benzothiazolyl)-7-diethylaminocoumarin; 2-(4-biphenylyl)-5-(4-t-butylphenyl)-1,3,4-oxadiazole; 2,5-bis-(4-biphenylyl)-oxazole; 2,2′-dimethyl-p-quaterphenyl; 2,2-dimethyl-p-terphenyl; 3,5,3″″,5″″-tetra-t-butyl-p-quinquephenyl; 2,5-diphenylfuran; 2,5-diphenyloxazole; 4,4′-diphenylstilbene; 4-dicyanomethylene-2-methy 1-6-(p-dimethylaminostyryl)-4H-pyran; 1,1′-diethyl-2,2′-carbocyanine iodide; 3,3′-diethyl-4,4′,5,5′-dibenzothiatricarbocyanine iodide; 7-dimethylamino-1-methyl-4-methoxy-8-azaquinolone-2; 7-dimethylamino-4-methylquinolone-2; 2-(4-(4-dimethylaminophenyl)-1,3-butadienyl)-3-ethylbenzothiazolium perchlorate; 3-diethylamino-7-diethyliminophenoxazonium perchlorate; 2-(1-naphthyl)-5-phenyloxazole; 2,2′-p-phenylen-bis(5-phenyloxazole); rhodamine 700; rhodamine 800; pyrene; chrysene; rubrene; or coronene.

20. The polymer composition of claim 11 wherein the fibrillated polytetrafluoroethylene is characterized by a DSC peak around 330° C.

Assignees

• Shpp Global Tech Bv

Inventors

• Ramakrishnan Vaidyanath
• Gaggar Satish Kumar
• Bihari Malvika
• CUSTODIO Frederico Marques Ferreira
• Goossens Johannes Martinus Dina

Classifications

• C08J9/141

  Hydrocarbons · CPC title

• C08L63/00 Primary

  Compositions of epoxy resins; Compositions of derivatives of epoxy resins · CPC title

• C08L27/20

  Homopolymers or copolymers of hexafluoropropene · CPC title

• C08J2203/14

  Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons · CPC title

• C08G2261/512

  Hole transport · CPC title