Polyester compounds having enhanced hydrophobic surface properties

Patent metadata

Field	Value
Publication number	US-10100159-B2
Application number	US-201414900574-A
Country	US
Kind code	B2
Filing date	Jul 10, 2014
Priority date	Jul 12, 2013
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

Abstract

A masterbatch having reactive silicone as a hydrophobic additive, the polyester compound that the silicone-containing masterbatch has been let down into, and the plastic articles and films from such compounds having enhanced hydrophobic properties are disclosed. Films having a Water Contact Angle of at least 76° (ASTM D7490-08) are exemplified.

First claim

What is claimed is:

1. A masterbatch, comprising:
(a) polyethylene terephthalate carrier;
(b) α, ω -difunctional polydimethylsiloxane, wherein the α, ω -difunctional polydimethylsiloxane is present in a range of 3 to 10 weight percent of the masterbatch;
(c) a chain extender of pyromellitic dianhydride, wherein the chain extender is present in a range of 0.5 to 1.0 weight percent of the masterbatch; and
(d) optionally, other additives comprising a catalyst.

2. The masterbatch of claim 1 , wherein the ingredients by weight percent of the masterbatch are listed in the chart below:

Polyester Terephthalate
80%-99%

Carrier

Catalyst
0.1%-2%  

Other optional additives
  0%-10%.

3. The masterbatch of claim 1 , wherein the α, ω -difunctional polydimethylsiloxane comprises epoxy-functional siloxanes or carbinol-functional siloxanes.

4. A hydrophobic polyester compound comprising the masterbatch of claim 1 and polyethylene terephthalate resin.

5. An enhanced hydrophobic polyester compound comprising:
(a) polyethylene terephthalate matrix and
(b) a hydrophobic polyester masterbatch of claim 1 .

6. The polyester compound of claim 5 , wherein the α, ω -difunctional polydimethylsiloxane of the masterbatch comprises epoxy-functional siloxanes or carbinol-functional siloxanes.

7. The polyester compound of claim 5 , wherein the amount of masterbatch is between about 10% to about 20% of the weight percent of the polyester compound.

8. The polyester compound of claim 5 , wherein the additive is selected from the group consisting of anti-blocking agents; adhesion promoters; biocides; anti-fogging agents; anti-static agents; bonding, blowing and foaming agents; dispersants; fillers and extenders; fire and flame retardants and smoke suppressants; impact modifiers; initiators; lubricants; micas; pigments, colorants and dyes; plasticizers; processing aids; silanes, titanates and zirconates; stabilizers; stearates; ultraviolet light absorbers; viscosity regulators; waxes; and combinations of them.

9. The polyester compound of claim 5 , in the shape of an injection molded plastic article, an extruded plastic article, a calendered plastic article, a blow molded plastic article, or a thermoformed plastic article.

10. A film having at least one layer comprised of the polyester compound of claim 5 .

11. A laminate of the film of claim 10 , wherein there is more than one film layer, and wherein each layer comprises same or different ingredients.

12. The laminate of claim 11 , wherein there is a skin layer contacting one surface of a core layer; wherein the core layer also has an opposing surface; and wherein the skin layer has a thickness between about 0.5 micrometers and about 1 millimeter.

13. The laminate of claim 12 , further comprising a second skin layer contacting the opposing surface of the core layer, wherein the core layer comprises polyester resin without the masterbatch.

14. The film of claim 10 , wherein the compound in the form of a film has a Water Contact Angle according to ASTM D7490-08 at least about 30 percent higher as compared with a film of the same polyester without the masterbatch.

15. The film of claim 14 , wherein the Water Contact Angle is at least 76°.

16. The film of claim 14 , wherein the Water Contact Angle is at least 78°.

17. The film of claim 14 , wherein the Water Contact Angle is at least 80°.

18. The film of claim 14 , wherein the Water Contact Angle is at least 81°.

19. A fiber comprised of the polyester compound of claim 5 .

Assignees

• Polyone Corp

Inventors

• Alric Jerome
• Huart Delphine
• Habay Andre
• Waeler Jerome

Classifications

• C08J2383/06

  containing silicon bound to oxygen-containing groups (C08J2383/12 takes precedence) · CPC title

• C08K5/09

  Carboxylic acids; Metal salts thereof; Anhydrides thereof · CPC title

• C08K5/1539

  Cyclic anhydrides · CPC title

• C08J5/18

  Manufacture of films or sheets · CPC title

• C08L2205/05

  containing polymer components which can react with one another · CPC title