Fluorine-containing ethylene-vinyl alcohol copolymer resin composition as well as mixture and blend thereof

Patent metadata

Field	Value
Publication number	US-11512196-B2
Application number	US-202017135798-A
Country	US
Kind code	B2
Filing date	Dec 28, 2020
Priority date	Dec 30, 2019
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

The instant disclosure relates to a fluorine-containing ethylene-vinyl alcohol copolymer (EVOH) resin composition as well as mixture and blend thereof. The fluorine-containing EVOH resin composition comprises EVOH and fluorine-containing particles, wherein the fluorine-containing EVOH resin composition has a total fluoride ion content ranging from 45 to 41000 ppm. The invention can reduce the adhesion of EVOH to the inside of the extruder, and effectively reduce the appearance of gel or gelled substance in subsequent finished products.

First claim

What is claimed is:

1. A fluorine-containing ethylene-vinyl alcohol copolymer resin composition, comprising:
an ethylene-vinyl alcohol copolymer; and
at least one fluorine-containing particle,
wherein the fluorine-containing ethylene-vinyl alcohol copolymer resin composition has a total fluoride ion content ranging from 45 to 41000 ppm.

2. The fluorine-containing ethylene-vinyl alcohol copolymer resin composition of claim 1 , wherein the fluorine-containing ethylene-vinyl alcohol copolymer resin composition has a surface fluoride ion content ranging from 1 to 126 ppm.

3. The fluorine-containing ethylene-vinyl alcohol copolymer resin composition of claim 1 , wherein the fluorine-containing particle includes a fluorinated polymer.

4. The fluorine-containing ethylene-vinyl alcohol copolymer resin composition of claim 1 , having at least two melting point temperatures:
a first melting point temperature of 100° C. to about 140° C. and a second melting point temperature of 150° C. to about 195° C.

5. The fluorine-containing ethylene-vinyl alcohol copolymer resin composition of claim 2 , wherein a ratio of the surface fluoride ion content to a total fluoride ion content of the fluorine-containing ethylene-vinyl alcohol copolymer resin composition ranges from 0.0015 to 0.03.

6. The fluorine-containing ethylene-vinyl alcohol copolymer resin composition of claim 1 , wherein an ethylene content of the ethylene-vinyl alcohol copolymer is 24-48 mole %.

7. The fluorine-containing ethylene-vinyl alcohol copolymer resin composition of claim 1 , wherein the ethylene-vinyl alcohol copolymer has a degree of saponification greater than 99.5 mole %.

8. The fluorine-containing ethylene-vinyl alcohol copolymer resin composition of claim 1 , wherein the fluorine-containing ethylene-vinyl alcohol copolymer resin composition further comprises a boron content of 50-250 ppm.

9. A fluorine-containing ethylene-vinyl alcohol copolymer resin composition, comprising:
an ethylene-vinyl alcohol copolymer; and
at least one fluorine-containing particle,
wherein the fluorine-containing ethylene-vinyl alcohol copolymer resin composition has a ratio of a surface fluoride ion content to a total fluoride ion content ranging from 0.0015 to 0.03.

10. A mixture containing fluorine-containing ethylene-vinyl alcohol copolymer resin composition, comprising:
the fluorine-containing ethylene-vinyl alcohol copolymer resin composition of claim 1 ; and
a first ethylene-vinyl alcohol copolymer,
wherein per 20 g of the mixture has a total fluoride ion content ranging from 100 to 11000 ppm.

11. The mixture of claim 10 , wherein the mixture has a surface fluoride ion content ranging from 2 to 55 ppm.

12. The mixture of claim 11 , wherein a ratio of the surface fluoride ion content to a total fluoride ion content of the mixture ranges from 0.0019 to 0.04.

13. The mixture of claim 10 , wherein the fluorine-containing ethylene-vinyl alcohol copolymer resin composition has an ethylene content that is the same as or different from an ethylene content of the first ethylene-vinyl alcohol copolymer.

14. A blend containing fluorine-containing ethylene-vinyl alcohol copolymer resin composition, comprising:
the fluorine-containing ethylene-vinyl alcohol copolymer resin composition of claim 1 ;
a first ethylene-vinyl alcohol copolymer; and
a second ethylene-vinyl alcohol copolymer;
wherein the first ethylene-vinyl alcohol copolymer has an ethylene content that is different from an ethylene content of the second ethylene-vinyl alcohol copolymer, and per 20 g of the blend has a total fluoride ion content ranging from 200 to 2000 ppm.

15. The blend of claim 14 , wherein a ratio of a surface fluoride ion content to a total fluoride ion content of the blend ranges from 0.0013 to 0.045.

Assignees

• Chang Chun Petrochemical Co Ltd

Inventors

• Wu Hou Hsi
• Li Yu Hsiu
• Lin Wen Hsin

Classifications

• B32B2250/24

  All layers being polymeric · CPC title

• B32B2264/0257

  Polyolefin particles, e.g. polyethylene or polypropylene homopolymers or ethylene-propylene copolymers · CPC title

• B32B2264/0242

  Vinyl halide, e.g. PVC, PVDC, PVF or PVDF (co)polymers · CPC title

• C08J2329/04

  Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids · CPC title

• C08L2205/14

  containing polymeric additives characterised by shape · CPC title