COATED FOOD-CONTACTING CONTAINERS

• US 20160108276A1
• Filed: 10/20/2014
• Published: 04/21/2016
• Est. Priority Date: 10/20/2014
• Status: Active Grant

• Current Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Original Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Inventors: Kaleem, Kareem, Moussa, Youssef
• Granted Patent: US 10,442,572 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B65D 25/14 Linings or internal coatings of containers made by folding or erecting blanks made of paper B65D5/56 ; linings for domestic water storage heaters F24H1/183
• CPC Class Codes: C08F 220/06 Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
• CPC Class Codes: C08F 283/02 on to polycarbonates or saturated polyesters C08F283/004 takes precedence
• CPC Class Codes: C08G 63/19 Hydroxy compounds containing aromatic rings
• CPC Class Codes: C08G 63/20 Polyesters having been prepared in the presence of compounds having one reactive group or more than two reactive groups
• CPC Class Codes: C09D 151/08 grafted on to macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds

Abstract

Containers comprising a food-contacting surface and a coating thereon are disclosed. The coating comprises a polymer derived from benzene dimethanol having segments of the following structure:

where R₁ is phenylene and R₂ is a divalent organic group and n=5 to 50.

Claims

1. A container comprising a food-contacting surface wherein at least a portion of the food-contacting surface is coated with a composition comprising a polymer derived from benzene dimethanol having segments of the following structure:

2. The container of claim 1 wherein R₂ comprises at least one of an arylene group containing from 6 to 12 carbon atoms or a saturated (cyclo)aliphatic group containing from 4 to 12 carbon atoms.

3. The container of claim 1 in which R₂ comprises linear alkylene.

4. The container of claim 1 in which the polymer has a number average molecular weight of 2,000 to 25,000.

5. A composition that is water based and in which the polymer of claim 1 is grafted to a (meth)acrylic polymer.