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container coating composition

A composition and coating technology, applied in polyester coatings, coatings, etc., can solve the problems of limited commercial applicability, poor hydrolytic stability, etc., and achieve the effect of improving hydrolytic stability

Active Publication Date: 2017-03-15
PPG IND OHIO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such compositions can exhibit poor hydrolytic stability when stored at high humidity, thereby limiting their commercial applicability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0070] testing method

[0071] The following test methods are used in the following examples.

[0072] A. Blush Resistance: Blush Resistance measures the ability of a coating to resist attack by different test solutions. When the coated membrane absorbs the test solution, it usually becomes cloudy or appears white. Blushing is visually measured using a scale of 1-10, where a rating of "10" indicates no blush, and a rating of "0" indicates complete whitening of the film. A blush rating of at least 7 is generally desired for a commercially viable coating. The coated panels tested were 2x4 inches (5x10cm) and the test solution covered half of the panel to be tested so you could compare the blushing of the exposed panel to the unexposed portion.

[0073]B. Adhesion: Adhesion tests were performed to evaluate whether the coating adhered to the substrate. The adhesion test was performed according to ASTM D3359-Test Method B using Scotch 610 tape available from 3M Company of Sai...

Embodiment A

[0089] polyester polymer

[0090] name quantity Topping #1 2-methyl-1,3-propanediol 539.26 Topping #2 Butyl titanate (catalyst) 2.5 Addition #3 Dimethyl 2,6-naphthalene dicarboxylate 883.76 Addition #4 Trimethylolpropane 11.62 Addition #5 Isophthalic acid 615.78 Addition #6 2-methyl-1,3-propanediol 381.91 Topping #7 Adipic acid 331.95 Topping #8 maleic anhydride 33.20 Addition #9 Stannous octoate (catalyst) 1.40 Topping #10 Aromatic 100 (aromatic thinner) 147.40 Addition #11 Aromatic 100 612 Addition #12 2-butoxyethanol 750 Addition #13 Methyl ether propylene glycol acetate 490

[0091] 1. Set the top temperature of the reactor used to pack the column, and open the condenser and sparge nitrogen.

[0092] 2. Add charges #1, 2, 3, 4 to the reactor. The reactor was slowly heated to 160°C (320°F). The temperature was raised so that the maxi...

Embodiment B

[0103] Embodiment B (comparison)

[0104] polyester polymer

[0105] name quantity Topping #1 2-methyl-1,3-propanediol 370.44 Topping #2 Dibutyltin oxide (catalyst) 0.34 Addition #3 Terephthalic acid 582.66 Addition #4 Ethylene glycol 260.64 Addition #5 Adipic acid 180.96 Addition #6 Trimethylolpropane 22.28 Topping #7 Isophthalic acid 582.66 Topping #8 Aromatic 150 489.42 Addition #9 Methyl ether propylene glycol 383.10 Topping #10 Propylene carbonate 817.28 Addition #11 Aromatic 150 674.6

[0106] 1. Set the top temperature of the reactor used to pack the column, and open the condenser and sparge nitrogen.

[0107] 2. Add Charges #1, 2, 3, 4 and 5 to the reactor. The reactor was slowly heated to 160°C (320°F). The temperature was raised so that the maximum reactor temperature was 245°C (473°F), the column temperature was not allowed to exceed 96°C...

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Abstract

A coating composition comprising a polyester resin binder and phosphated polyester. The composition is useful for coating containers such as food and beverage containers. The composition has excellent hydrolytic stability when stored at high temperature. The composition is formulated to be substantially free of bisphenol A (BPA) and bisphenol A diglycidyl ether (BADGE).

Description

[0001] Cross-Referenced Related Applications [0002] This application is a continuation-in-part of Application Serial No. 13 / 113130 ​​filed May 23,2011. [0003] field of invention [0004] The present invention relates to container coating compositions based on polyester resins. [0005] Background of the invention [0006] A wide variety of coatings have been used to coat the surfaces of food and beverage containers. Metal cans, for example, are sometimes coated using coil coating or sheet coating operations, ie, coils or sheets of steel or aluminum are coated with a suitable composition and cured. The coated substrate then forms the can body or can end. Alternatively, the coating composition may be applied to the formed can, for example by spraying and dipping, and then cured. Coatings for food and beverage containers should preferably be capable of being applied to a substrate at high speed and, when cured, provide the necessary properties for use in the harsh end-use ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/54C09D167/06
CPCC09D167/06C08G63/54C08G63/6928
Inventor C·森内克J·M·威廉姆森C·诺茨Y·穆萨
Owner PPG IND OHIO INC