Polymer processing additive, compositions, and methods

Patent metadata

Field	Value
Publication number	US-11359079-B2
Application number	US-201415022842-A
Country	US
Kind code	B2
Filing date	Sep 19, 2014
Priority date	Sep 20, 2013
Publication date	Jun 14, 2022
Grant date	Jun 14, 2022

Abstract

A poly(oxyalkylene) polymer and a metal salt of a carboxylic acid, sulfonic acid, or alkylsulfate, in combination are useful as a polymer processing additive synergist. Polymer processing additive compositions, homogeneously catalyzed olefin compositions, and other extrudable polymer 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 composition comprising:
a polyolefin;
a polymer processing additive selected from the group consisting of a fluoropolymer and a silicone-containing polymer; and
a polymer processing additive synergist comprising a polyethylene glycol and a metal salt selected from the group consisting of a metal salt of an aliphatic carboxylic acid, a metal salt of an aliphatic sulfonic acid, and a metal salt of an alkylsulfate, wherein the polyethylene glycol is present in an amount of at least 85% by weight, based on the total weight of the polymer processing additive synergist, and wherein the metal salt is a sodium, potassium, aluminum, or barium salt.

2. The composition of claim 1 , wherein the polymer processing additive synergist comprising the polyethylene glycol and the metal salt has higher thermal stability than the polyethylene glycol alone.

3. The composition of claim 1 , wherein the metal salt is the metal salt of an aliphatic carboxylic acid or the metal salt of an aliphatic sulfonic acid.

4. The composition of claim 3 , wherein the metal salt is the metal salt of an aliphatic carboxylic acid, and wherein the aliphatic carboxylic acid is other than stearic acid.

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

6. The composition of claim 1 , wherein the metal salt is present in an amount of at least 5% by weight, based on the total weight of the polymer processing additive synergist.

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

8. The composition of claim 1 , wherein the polyolefin is made by homogeneous catalysis with a metallocene catalyst.

9. The composition of claim 1 , wherein the polymer processing additive is a fluoropolymer having a Mooney viscosity ML 1+10 @ 121° C. in a range from 30 to 90.

10. The composition of claim 1 , wherein the combined weight of the polymer processing additive and the polymer processing additive synergist is in a range from 0.01 percent to 10 percent, based on the total weight of the composition.

11. The composition of claim 1 , wherein the polymer processing additive is a fluoropolymer.

12. The composition of claim 1 , wherein the polymer processing additive is a silicone-containing polymer.

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

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

15. A composition comprising:
a polyolefin;
a polymer processing additive selected from the group consisting of a fluoropolymer and a silicone-containing polymer; and
a polymer processing additive synergist comprising a polyethylene glycol and a metal salt selected from the group consisting of a metal salt of a carboxylic acid and a metal salt of a sulfonic acid, wherein the metal salt is a sodium or potassium salt, and wherein the polyethylene glycol is present at least at 85% by weight, based on the total weight of the polymer processing additive synergist.

16. The composition of claim 15 , wherein the polyolefin is a linear low density polyethylene.

17. The composition of claim 15 , wherein the polymer processing additive is a fluoropolymer having a Mooney viscosity ML 1+10 @ 121° C. in a range from 30 to 90.

18. The composition of claim 15 , wherein the metal salt is present in an amount of at least 5% by weight, based on the total weight of the polymer processing additive synergist.

19. The composition of claim 1 , wherein the polyolefin is made with a metallocene catalyst.

20. The composition of claim 1 , wherein the polyolefin is made with a single-site catalyst.

Assignees

• 3M Innovative Properties Co

Inventors

• LAVALLéE CLAUDE
• Mamun Shireen A

Classifications

• C08L23/0815 Primary

  with aliphatic 1-olefins containing one carbon-to-carbon double bond · CPC title

• B29B7/7461

  Combinations of dissimilar mixers · CPC title

• C08K3/22

  of metals · CPC title

• C08L2310/00

  Masterbatches · CPC title

• B29K2105/0094

  having particular viscosity · CPC title