Poly(oxyalkylene) polymer processing additive, compositions, and methods

Patent metadata

Field	Value
Publication number	US-10982079-B2
Application number	US-201515537506-A
Country	US
Kind code	B2
Filing date	Dec 17, 2015
Priority date	Dec 19, 2014
Publication date	Apr 20, 2021
Grant date	Apr 20, 2021

Abstract

A poly(oxyalkylene) polymer having a weight average molecular weight of at least 50,000 grams per mole and a metal salt of a carboxylic acid, sulfonic acid, or alkylsulfate, in combination are useful as a polymer processing additive. In some embodiments, the polymer processing additive further includes a poly(oxyalkylene) polymer having a weight average molecular weight of up to 20,000 grams per mole Polymer processing additive compositions and thermoplastic, for example, polyolefin, compositions including a poly(oxyalkylene) polymer and a metal salt of a carboxylic acid, sulfonic acid, or alkylsulfate are disclosed. Methods of reducing melt defects during the extrusion of a thermoplastic polymer, which may be a homogeneously catalyzed polyolefin, are also disclosed.

First claim

What is claimed is:

1. A thermoplastic composition comprising:
a polyolefin; and
a polymer processing additive composition comprising:
a first poly(oxyalkylene) polymer having a weight average molecular weight of at least 60,000 grams per mole;
a second poly(oxyalkylene) polymer having a weight average molecular weight of up to 15,000 grams per mole; and
a metal salt of a carboxylic acid, sulfonic acid, or alkylsulfate, wherein the first poly(oxyalkylene) polymer and the second poly(oxyalkylene) polymer are present in a weight ratio ranging from 1:3 to 2:1, and wherein the thermoplastic composition is free of fluoropolymers and silicones.

2. The thermoplastic composition of claim 1 , wherein the weight average molecular weight of the first poly(oxyalkylene) polymer is up to about 500,000 grams per mole.

3. The thermoplastic composition of claim 1 , wherein the weight average molecular weight of the first poly(oxyalkylene) polymer is up to about 1,000,000 grams per mole.

4. The thermoplastic composition of claim 1 , wherein the metal salt is a metal salt of a carboxylic acid.

5. The thermoplastic composition of claim 1 , further comprising at least one of an antioxidant, a metal oxide, or a hindered amine light stabilizer.

6. The thermoplastic composition of claim 1 , wherein the first poly(oxyalkylene) polymer is a polyethylene glycol.

7. The thermoplastic composition of claim 1 , wherein the polyolefin is a linear low density polyethylene.

8. The thermoplastic composition of claim 1 , wherein the polyolefin is a homogeneously catalyzed polyolefin.

9. A method of reducing melt defects during extrusion of the polyolefin, the method comprising extruding the thermoplastic composition of claim 1 .

10. The method of claim 9 , further comprising:
admixing the polymer processing additive composition and the polyolefin to provide the thermoplastic composition before extruding the thermoplastic composition.

11. The thermoplastic composition of claim 1 , wherein the metal salt is present at up to 15% by weight, based on the total weight of the first poly(oxyalkylene) polymer, the second poly(oxyalkylene) polymer, and the metal salt of a carboxylic acid, sulfonic acid, or alkyl sulfate.

12. The thermoplastic composition of claim 1 , wherein the first poly(oxyalkylene) polymer and second poly(oxyalkylene) polymer are present in a weight ratio ranging from 1:2 to 2:1.

13. The thermoplastic composition of claim 1 , wherein the composition further comprises polycaprolactone.

14. The thermoplastic composition of claim 1 , wherein the metal salt is a sodium or potassium salt.

15. The thermoplastic composition of claim 1 , wherein the metal salt is a zinc or calcium salt.

16. The thermoplastic composition of claim 1 , wherein the metal salt is present in an amount of 0.0001 percent by weight to 0.5 percent by weight, based on the total weight of the thermoplastic composition.

17. The thermoplastic composition of claim 1 , wherein the second poly(oxyalkylene) polymer has a weight average molecular weight of about 8,000 grams per mole.

Assignees

• 3M Innovative Properties Co

Inventors

• LAVALLéE CLAUDE
• Mamun Shireen A

Classifications

• C08K5/42

  Sulfonic acids; Derivatives thereof · CPC title

• C08K5/521

  Esters of phosphoric acids, e.g. of H3PO4 · CPC title

• C08L71/02

  Polyalkylene oxides · CPC title

• C08K5/098

  Metal salts of carboxylic acids · CPC title

• C08L23/04 Primary

  Homopolymers or copolymers of ethene · CPC title