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Ethylene-vinyl alcohol copolymer (EVOH) containing resin composition and mixture and blend thereof

A technology of vinyl alcohol copolymer and resin composition, applied in the direction of synthetic resin layered products, chemical instruments and methods, layered products, etc., can solve high gel, extruder current and pressure rise, cannot be processed or solved, etc. question

Pending Publication Date: 2021-07-16
CHANG CHUN PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These problems may reduce the visual appearance and mechanical strength of films formed from EVOH
Furthermore, these issues have not been adequately addressed or resolved by existing technologies
[0005] For example, the traditional method is to add boron to remove the EVOH sticking to the inside of the machine, but once the concentration of boron ions is too high, it will easily lead to an increase in the current and pressure of the extruder, and even uneven dispersion of boron ions will also lead to Subsequent film formation has too much gel (Gel), making the film appearance unsightly

Method used

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  • Ethylene-vinyl alcohol copolymer (EVOH) containing resin composition and mixture and blend thereof
  • Ethylene-vinyl alcohol copolymer (EVOH) containing resin composition and mixture and blend thereof
  • Ethylene-vinyl alcohol copolymer (EVOH) containing resin composition and mixture and blend thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Four fluoropolymers (Example Fluoropolymers A-D) were prepared according to the invention. The fluorine-containing ethylene-vinyl alcohol copolymer (hereinafter referred to as "EVOH") resin composition of the present invention was then prepared using Example Fluoropolymers A-D. Although Example Fluoropolymers A-D were prepared according to the specific methods disclosed below, other types of fluoropolymers can be used to add to EVOH.

[0049] Example Fluoropolymer A

[0050] Example Fluoropolymer A was prepared using an autoclave as a batch reactor. The autoclave has an internal volume of about 20 L and is equipped with an electromagnetic induction stirrer. Fully fill the autoclave with nitrogen (N 2 ), and then filled with reduced-pressure nitrogen five times.

[0051]While reducing the pressure in the autoclave, 6960 g of deoxygenated pure water, 3204 g of 1,1,2-trichloro-1,2,2-trifluoroethane, and 3.5 g of methylcellulose were put into the autoclave. The viscosi...

Embodiment 2

[0065] A non-limiting method of preparing fluorine-containing EVOH particles formed from the fluorine-containing EVOH resin composition is provided below. According to methods similar to those disclosed below, 16 non-limiting example EVOH resin compositions (Examples EVOH 1-16) and 4 comparative example EVOH resin compositions (Comparative Example EVOH 1-4) with fluorine particles were prepared. ). However, the specific methods for preparing Example EVOH 1-16 and Comparative Example EVOH 1-4 will generally differ in one or more respects from the methods disclosed below.

[0066] An ethylene-vinyl acetate copolymer (hereinafter referred to as "EVAC") with an ethylene content of 29 mole% was saponified to a saponification degree of 99.5% to prepare EVOH polymer. Subsequently, EVOH was dissolved in a solution containing methanol and water (70:30 ratio). After that, the EVOH solid content of the solution was 41 wt.%, and the solution was placed at 60°C.

[0067] Then the aforem...

Embodiment 3

[0072] Films were formed using Example EVOH particles 1 to 16, respectively, according to the methods described below. The Example EVOH particles 1-16 and Comparative Example EVOH particles 1-4 were fed into a single-layer T-die casting film extruder (optical control system MEV4) to prepare a film. The thicknesses of the films formed from Example EVOH particles 1-16 and Comparative Example EVOH particles 1-4 were each 20 μm. The temperature of the extruder was set at 220°C, and the temperature of the mold (ie, T-shaped mold) was set at 230°C. The rotation frequency of the screw was 7 rpm (rotations / minutes).

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Abstract

The present invention relates to an Eethylene vinyl alcohol copolymer-containing resin composition and a mixture and a blend thereof. The EVOH-containing resin composition comprises an ethylene-vinyl alcohol copolymer and fluorine-containing particles, and the total fluorine ion content of the EVOH-containing resin composition is greater than 45 and less than 41000 ppm. According to the invention, EVOH attached to the interior of the extruder can be reduced, and gel or gels of subsequent finished products can be effectively reduced.

Description

[0001] CROSS REFERENCE TO RELATED APPLICATIONS: This application claims priority to U.S. Patent Application Serial No. 16 / 729,984, filed December 30, 2019, entitled "Ethylene-Vinyl Alcohol Particles and Films Thereof," and the present This application is a continuation-in-part of this case, the entire contents of which are hereby incorporated by reference. This application also claims priority to U.S. Patent Application Nos. 16 / 877,555 and 16 / 877,570, filed May 19, 2020, the entire contents of which are hereby incorporated by reference. technical field [0002] The invention relates to a fluorine-containing ethylene-vinyl alcohol copolymer (ethylene-vinyl alcohol, EVOH) resin composition. The fluorine-containing ethylene-vinyl alcohol copolymer resin composition has particles, particularly fluorine-containing particles. The total fluoride ion content contained in the fluorine-containing EVOH resin composition is greater than 45 and less than 41000ppm. The invention also disc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L29/04C08L27/20C08L27/16C08J5/18
CPCB29B9/065B29B9/12C08F214/18C08J3/12C08J5/18C08L23/08C08L27/12C08L29/04C08L101/04C08L23/0861C08J2323/08C08J2427/20C08J2329/04C08J2427/16C08L2203/16C08L27/20C08L27/16B32B27/306C08K2003/387B29B9/16B29B7/007B32B2307/7244B32B27/18B32B2307/558B32B2264/303B32B2264/302B32B2264/0242B32B27/08B32B7/12B32B27/32B32B27/34B32B2250/03B32B2250/24B32B2250/246C08L2205/025B29B7/48B29B7/726C08K3/38C08L23/28
Inventor 吴厚锡李育修林文星
Owner CHANG CHUN PETROCHEMICAL CO LTD
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