HPMC composition for coating of paper and board for reducing migration of mineral oil hydrocarbons (MOH)
AssigneeNutrition & Biosciences USA 1, LLC
InventorRoland Bayer
Life of this patent
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Abstract
This disclosure relates to an aqueous solution for coating a paper or board surface for reducing MOSH or MOAH migration. The aqueous solution involves hydroxypropyl methylcellulose (HPMC) in an amount of from 10% to 60% (w/w), wherein the viscosity of said hydroxypropyl methylcellulose (HPMC) is from 2 mPa·s to 100 mPa·s, determined as a 2% (w/w) solution in water at 20° C. according to Ubbelohde.
Claims19
A paper or board comprising a coating comprising an aqueous solution for reducing mineral oil saturated hydrocarbon (MOSH) or mineral oil aromatic hydrocarbon (MOAH) migration on a surface of the paper or board, the aqueous solution consisting of:
- (a) water and hydroxypropyl methylcellulose (HPMC) in an amount of from 10% to 60% (HPMC weight/total weight), wherein a viscosity of the hydroxypropyl methylcellulose (HPMC) is from 2 mPa·s to 100 mPa·s, determined as a 2% (w/w) solution in water at 20° C. according to Ubbelohde;
- or (b) water and HPMC in an amount of from 10% to 60% (HPMC weight/total weight), wherein a viscosity of the HPMC is from 2 mPa·s to 100 mPa·s, determined as a 2% (w/w) solution in water at 20° C. according to Ubbelohde, and a plasticizer.
A method for reducing mineral oil saturated hydrocarbon (MOSH) or mineral oil aromatic hydrocarbon (MOAH) migration on a paper or board surface, wherein the method comprises:
- (a) contacting the paper or board surface with:
- (i) an aqueous solution consisting of water and a hydroxypropyl methylcellulose (HPMC) in an amount of from 10% to 60% (HPMC weight/total weight), wherein a viscosity of the HPMC is from 2 mPa·s to 100 mPa·s, determined as a 2% (w/w) solution in water at 20° C. according to Ubbelohde;
- or
- (ii) an aqueous solution consisting of water, HPMC in an amount of from 10% to 60% (HPMC weight/total weight), wherein a viscosity of the HPMC is from 2 mPa·s to 100 mPa·s, determined as a 2% (w/w) solution in water at 20° C. according to Ubbelohde, and a plasticizer;
- and
- (b) allowing the aqueous solution of (a) (i) or (a) (ii) to dry on the paper or board surface to create a coating on the paper or board surface that reduces the MOSH or MOAH migration as compared to a paper or board lacking the coating.
A method for applying a coating composition to a paper or board surface, the method comprising
- (a) preparing the coating composition, wherein the coating composition consists of:
- (i) an aqueous solution consisting of water and a hydroxypropyl methylcellulose (HPMC) in an amount of from 10% to 60% (HPMC weight/total weight), wherein a viscosity of the HPMC is from 2 mPa·s to 100 mPa·s, determined as a 2% (w/w) solution in water at 20° C. according to Ubbelohde;
- or
- (ii) an aqueous solution consisting of water, HPMC in an amount of from 10% to 60% (HPMC weight/total weight), wherein a viscosity of the HPMC is from 2 mPa·s to 100 mPa·s, determined as a 2% (w/w) solution in water at 20° C. according to Ubbelohde, and a plasticizer, and
- (b) contacting the paper or board surface with the coating composition.
Dependencies are inferred from the claim text.