Coated polymeric particulates, and a process for coating polymeric particulates

Patent metadata

Field	Value
Publication number	US-9290668-B2
Application number	US-201113703146-A
Country	US
Kind code	B2
Filing date	Jun 17, 2011
Priority date	Jun 18, 2010
Publication date	Mar 22, 2016
Grant date	Mar 22, 2016

Abstract

The instant invention provides coated polymeric particulates, and a method for producing polymeric particulates. The coated polymeric particulates according to the present invention comprise (a) one or more polymeric particulates; and (b) a coating composition present on at least a portion of at least one surface of said polymeric particulate, wherein said coating composition comprises a dispersion comprising: (1) one or more base polymers, (2) one or more stabilizing agents; (3) one or more biocide agents; (4) one or more neutralizing agents; and (5) water.

First claim

We claim:

1. A coated polymeric particulate comprising:
one or more polymeric particulates; and
a coating layer, in dried form, formed from only one coating composition, derived from one aqueous dispersion, and present on at least a portion of at least one surface of said polymeric particulates, wherein the coating layer is derived from the application of the dispersion to at least one surface of one or more of said polymeric particulates, and wherein the dispersion consists of:
an ethylene/alpha-olefin copolymer;
one or more stabilizing agents;
one or more biocide agents;
one or more neutralizing agents; and
water, and

wherein said one or more biocide agents are selected from the group consisting of the following: [heavy metals], [formaldehyde], [formaldehyde donors], [cyanobutanes], [isothiazolinones], [combination of 5-chloro-2-methyl-4-isothiazolin-3-one (CIT) and 2-methyl-4-isothiazolin-3-one (MIT)], [2-methyl-4-isothiazolin-3-one (MIT)], and [combination of 2-methyl-4-isothiazolin-3-one (MIT) and 1,2 benzisothiazolin-3-one (BIT)].

2. The coated polymeric particulate of claim 1 , wherein said one or more polymeric particulates are selected from the group consisting of the following: ethylene based polymers and propylene based polymer.

3. The coated polymeric particulate according to claim 2 , wherein said ethylene based polymer comprises an ethylene interpolymer.

4. The coated polymeric particulate according to claim 3 , wherein said ethylene interpolymer is an interpolymer of ethylene and one or more α-olefin comonomers, or ethylene-propylene-diene-monomer (EPDM).

5. The coated polymeric particulate according to claim 2 , wherein said propylene based polymer comprises a propylene interpolymer.

6. The coated polymeric particulate according to claim 5 , wherein said propylene interpolymer is an interpolymer of propylene and one or more α-olefin comonomers.

7. The coated polymeric particulate of claim 1 , wherein said one or more polymeric particulates comprises a foam.

8. The coated polymeric particulate according to claim 1 , wherein said stabilizing agent comprises the reaction product of oleic acid and metal hydroxide in the presence of said water.

9. The coated polymeric particulate according to claim 8 , wherein said metal hydroxide is NaOH, or KOH.

10. The coated polymeric particulate according to claim 1 , wherein said dispersion has a pH in the range of greater than 8 and less than 12.

11. The coated polymeric particulate according to claim 1 , where said dispersion has a volume average particle size diameter in the range of from 0.1 to 5 micrometer.

12. The coated polymeric particulate according to claim 1 , wherein said dispersion has a solid content in the range of 35 to 65 weight percent, based on the total weight of the dispersion.

13. The coated polymeric particulate according to claim 1 , wherein the ethylene/alpha-olefin copolymer of the dispersion is an ethylene/octene copolymer.

14. The coated polymeric particulate according to claim 1 , wherein the dispersion has a volume average particle size diameter in the range of from 0.1 to 1 micrometer.

15. A method for producing the coated polymeric particulates of claim 1 comprising the steps of:
selecting one or more polymeric particulates,
selecting a coating composition consisting essentially of a dispersion consisting of:
an ethylene/alpha-olefin copolymer;
one or more stabilizing agents;
one or more biocide agents;

one or more neutralizing agents; and
water;

applying said coating composition to at least one or more surfaces of said one or more polymeric particulates;
thereby forming one or more coated polymeric particulates, and,

wherein said one or more biocide agents are selected from the group consisting of the following: [heavy metals], [formaldehyde], [formaldehyde donors], [cyanobutanes], [isothiazolinones], [combination of 5-chloro-2-methyl-4-isothiazolin-3-one (CIT) and 2-methyl-4-isothiazolin-3-one (MIT)], [2-methyl-4-isothiazolin-3-one (MIT)], and [combination of 2-methyl-4-isothiazolin-3-one (MIT) and 1,2 benzisothiazolin-3-one (BIT)].

16. The method for producing polymeric particulates of claim 15 , wherein the ethylene/alpha-olefin copolymer of the dispersion is an ethylene/octene copolymer.

Assignees

• Dhodapkar Shrikant
• Kalinowski Matthew J
• Guerra Suzanne M
• Batra Ashish
• Wevers Ronald
• Lakeman Pascal E R E J
• Dow Global Technologies Llc

Inventors

• Dhodapkar Shrikant
• Kalinowski Matthew J
• Guerra Suzanne M
• Batra Ashish
• Wevers Ronald
• Lakeman Pascal E R E J

Classifications

• C09D5/14 Primary

  Paints containing biocides, e.g. fungicides, insecticides or pesticides (C09D5/16 takes precedence) · CPC title

• C08J2323/02

  not modified by chemical after treatment · CPC title

• B29B2009/163

  Coating, i.e. applying a layer of liquid or solid material on the granule · CPC title

• B29B13/065

  of powder or pellets · CPC title

• C08J3/124 Primary

  Treatment for improving the free-flowing characteristics · CPC title