Gas barrier coating of polyamine, polyepoxide and hydroxyaromatic compound
AssigneePPG Industries Ohio, Inc.
InventorsLeland H. Carlblom, Cynthia Kutchko, Ken W. Niederst
Life of this patent
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Abstract
Gas barrier coating compositions are provided which include a polyamine component, a polyepoxide component and a hydroxy-substituted aromatic compound that is present in an amount sufficient to provide a gas barrier coating having an oxygen permeability less than or equal to 75 percent of the oxygen permeability of the same composition without a hydroxy-substituted aromatic compound. Also provided is a multi-layer packaging material having at least one gas permeable packaging material layer and at least one gas barrier material layer formed from the gas barrier coating composition. Sealable containers are also provided.
Claims46
A gas barrier coating composition comprising:
- (A) a polyamine component comprising at least one polyamine;
- (B) a polyepoxide component comprising a polyepoxide having at least two glycidyl groups linked to an aromatic member;
- and
- (C) a hydroxy-substituted aromatic compound represented by the following structure (I):
- HO—A—R1R2 (I)
- wherein A is arylene;
- R1 and R2 are each independently H, OH, R3, O(OC)R′3, NH(CO)R′3, NH2, CH2R4, C(CH3)2R4 or (CO)R5,
- where R3 is alkyl;
- R′3 is H or alkyl;
- R4 is a hydroxy-substituted aromatic group or an amino group;
- and R5 is a (di)hydroxy substituted aromatic group, provided that when R1 is H or R3, R2 is not H or R3, and
- wherein the hydroxy-substituted aromatic compound (C) is present in the gas barrier coating composition in an effective amount sufficient to provide a gas barrier coating having an oxygen permeability (P(O2)) less than or equal to 75 percent of the oxygen permeability (P(O2)) of a gas barrier coating provided by the same gas barrier coating composition which is free of hydroxy-substituted aromatic compounds.
A multi-layer packaging material having at least one gas permeable packaging material layer and at least one gas barrier material layer, said gas barrier material layer comprising:
- (A) a polyamine component comprising at least one polyamine:
- (B) a polyepoxide component comprising a polyepoxide having at least two glycidyl groups linked to an aromatic member;
- and
- (C) a hydroxy-substituted aromatic compound represented by the following structure (I):
- HO—A—R1R2 (I)
- wherein A is arylene;
- R1 and R2 are each independently H, OH, R3, O(OC)R′3, NH(CO)R′3, NH2, CH2R4, C(CH3)2R4 or (CO)R5,
- where R3 is alkyl;
- R′3 is H or alkyl;
- R4 is a hydroxy-substituted aromatic group or an amino group;
- and R5 is a (di)hydroxy substituted aromatic group, provided that when R1 is H or R3, R2 is not H or R3,
- wherein the hydroxy-substituted aromatic compound (C) is present in the gas barrier material layer in an amount which is sufficient to provide a gas barrier material layer having an oxygen permeability (P(O2)) less than or equal to 75 percent of the P(O2) of a multi-layer packaging material comprising the same gas permeable packaging material layer and the same gas barrier material layer which is free of hydroxy-substituted aromatic compounds.
Dependencies are inferred from the claim text.