Process for preparing heat treated solution cast polyketone-based barrier polymer materials

• US 4,895,689 A
• Filed: 12/04/1987
• Issued: 01/23/1990
• Est. Priority Date: 12/04/1987
• Status: Expired due to Fees

• Current Assignee: Shell Oil Company (Shell Plc)
• Original Assignee: Shell Oil Company (Shell Plc)
• Inventors: Gerlowski, Leonard E.
• Primary Examiner(s): Lorin, Hubert C.
• Application Number:
  US07/128,967
• Time in Patent Office: 781 Days
• Field of Search: 264/216, 264/204, 264/331.17, 264/331.15, 264/41, 264/49, 264/298, 264/234, 264/237, 264/319, 264/345, 264/348, 210/500.22, 210/500.27
• US Class Current: 264/216
• CPC Class Codes: B01D 71/72 Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of the groups B01D71/46 - B01D71/70 and B01D71/701 - B01D71/702
• CPC Class Codes: C08G 67/02 Copolymers of carbon monoxide and aliphatic unsaturated compounds
• CPC Class Codes: C08J 2329/12 Homopolymers or copolymers of unsaturated ketones
• CPC Class Codes: C08J 5/18 Manufacture of films or sheets

Abstract

A process for preparing a polymer material having improved oxygen and carbon dioxide barrier properties wherein a heated solution cast film, of a linear alternating polymer of carbon dioxide and at least one ethylenically unsaturated hydrocarbon, is cooled at a selected rate.

Claims

1. A process for preparing a polymer material having improved oxygen and carbon dioxide barrier properties comprising the steps of:

blending together hexafluoroisopropanol and a member selected from the group consisting of methanol, ethanol, isopropyl alcohol, butanol, and mixtures thereof, in a ratio of vol% ranging from 99;

1 to 60;

40;

adding a quantity of a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon to form up to a 17wt% solution of said polymer;

casting said solution forming a solution cast film;

heating said solution cast film to a temperature in the range from about 20°

C. to below to about 0°

C. below the melting point of the polymer; and

cooling said heated solution cast film at from about 6°

C. to about 10°

C. per minute.

2. The process of claim 1, wherein after said film is cooled, said film is heated to a temperature from about 0°

C. to about 20°

C. below the melting point of the polymer and cooled at a moderate cooling rate.

3. The process of claim 1, wherein said linear alternating polymer is of the formula:

##STR1## wherein B is the moiety of an ethylenically unsaturated α

-olefin of at least 3 carbon atoms polymerized through the ethylenic unsaturation, the ratio of y;

x is no more than about 0.5.

4. The process of claim 3, wherein the α

-olefin is propylene and the ratio of y;

x is from about 0.01 to about 0.2.

5. The process of claim 1, further including the step of adding a member selected from the group consisting of:

a filler, a hardener, an extender, a fortifier, a carrier, a preservative, a substance to enhance the amorphous density of the polymer material, a nucleating agent and mixtures thereof,

to the solution prior to solution casting.

6. The process of claim 1, wherein hexafluoroisopropanol and methanol are blended together in the proportion 84:

16 vol%.