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US 10,377,912 B2Granted
Container coating compositions
AssigneePPG Industries Ohio, Inc.
InventorsRobert McVay, Christopher Most, Ayaz Kutubuddin
Life of this patent
Estimating the term…
Abstract
A coating composition comprising a polyester, a mixture of novolak and resole resins and a vinyl chloride polymer, and the use of these compositions to coat metal containers is disclosed.
Claims17
A coating composition comprising:
- (a) 10 to 40 percent by weight of a polyester having a number average molecular weight of at least 15,000, an acid value of below 10 and a hydroxyl value of below 20,
- (b) 20 to 40 percent by weight of a phenolplast comprising:
- (i) a resole resin,
- (ii) a novolak resin prepared by reacting formaldehyde and phenol in a molar ratio of less than about 1:1 in the presence of an acid catalyst,
- in which the resin solids weight ratio of (i) to (ii) is from 2.0 to 4.0:1,
- (c) 30 to 50 percent by weight of a vinyl chloride polymer;
- the percentages by weight being based on weight of resin solids in the coating composition.
4 more elements
A method of coating a container comprising:
- (a) applying to the substrate a coating composition comprising:
- (i) 10 to 40 percent by weight of a polyester having a number average molecular weight of at least 15,000, an acid value of below 10 and a hydroxyl value of below 20,
- (ii) 20 to 40 percent by weight of a phenolplast comprising:
- (A) a resole resin,
- (B) a novolak resin prepared by reacting formaldehyde and phenol in a molar ratio of less than about 1:1 in the presence of an acid catalyst,
- in which the resin solids weight ratio of (A) to (B) is from 2.0 to 4.0:1,
- (iii) 30 to 50 percent by weight of a vinyl chloride polymer;
- the percentages by weight being based on weight of resin solids in the coating composition;
- (b) curing the composition on the substrate to form a coating, and
- (c) forming a container from the coated substrate.
7 more elements
A coated container comprising a coating composition applied to at least a portion of the interior surface of the container in which the composition comprises:
- (a) 10 to 40 percent by weight of a polyester having a number average molecular weight of at least 15,000, an acid value of below 10 and a hydroxyl value of below 20,
- (b) 20 to 40 percent by weight of a phenolplast comprising:
- (i) a resole resin,
- (ii) a novolak resin prepared by reacting formaldehyde and phenol in a molar ratio of less than about 1:1 in the presence of acid catalyst,
- in which the resin solids weight ratio of (i) to (ii) is from 2.0 to 4.0:1,
- (c) 30 to 50 percent by weight of a vinyl chloride polymer;
- the percentages by weight being based on weight of resin solids in the coating composition.
4 more elements
Dependencies are inferred from the claim text.