US 5,491,190 AGranted

Repulpable hot melt polymer/fatty acid compositions for fibrous products

AssigneeS. C. Johnson & Son, Inc.

InventorsPaul E. Sandvick, Calvin J. Verbrugge

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Abstract

Hot melt polymer/fatty acid compositions are described that render fibrous products such as paper, paperboard and corrugated paper containers water-resistant at room temperature, but enable such articles to be repulped and recycled when the coated articles are repulped in a heated nearly neutral to alkaline pH aqueous medium. The compositions comprise from about 5% to 50% by weight of an addition polymer of from about 5 to 95 mole percent of an ethylenically unsaturated monocarboxylic acid or 50 to 95 mole percent of an ethylene-1,2-dicarboxylic acid or anhydride and the balance to a total of 100 mole percent of at least one additional ethylenically unsaturated monomer selected from the group consisting of 1-alkenes having from about 4 to 60 carbon atoms; alkyl vinyl ethers having an ether alkyl group of from about 8 to 60 carbon atoms, and alkyl acrylates or alkyl methacrylates having an alkyl group of from about 8 to 60 carbon atoms; optionally from about 1 to 90 mole percent of the carboxyl groups in the polymer may be further modified by reaction with a substituted or unsubstituted monoalcohol or monoamine; and from about 50% to 95% by weight of at least one fatty acid selected from the group consisting of natural or synthetic fatty acids containing from about 12 to 48 carbon atoms, wherein the fatty acid is compatible with the polymer and the composition is a solid at 20.degree. C., but starts to become fluid between about 50.degree. C. to 95.degree. C.

A hot melt polymer/fatty acid composition that is dispersible in a heated nearly neutral to alkaline aqueous pH medium consisting essentially of

A. from about 5% to 50% by weight based upon the total weight of the composition of at least one addition polymer selected from the group consisting of
(i) a polymer of from about 5 to 95 mole percent of at least one ethylenically unsaturated monocarboxylic acid monomer containing a free carboxyl group and from about 5 to 95 mole percent of at least one additional ethylenically unsaturated monomer,
(ii) a polymer of from about 50 to 95 mole percent of at least one ethylenically-unsaturated dicarboxylic acid monomer selected from the group consisting of an ethylene-1,2-dicarboxylic acid containing two free carboxyl groups and an ethylene 1,2-dicarboxylic acid anhydride having two carboxyl groups in the form of an anhydride group, and from about 5 to 50 mole percent of at least one additional ethylenically unsaturated monomer, and
(iii) a polymer of a total of from about 5 to 95 mole percent of (a) at least one of the ethylenically unsaturated monocarboxylic acid monomers and (b) at least one of the ethylenically-unsaturated dicarboxylic monomers and from about 5 to 95 mole percent of at least one additional ethylenically unsaturated monomer,
wherein the additional ethylenically unsaturated monomer is selected from the group consisting of 1-alkenes having from about 4 to 60 carbon atoms;
alkyl vinyl ethers having an ether alkyl group of from about 8 to 60 carbon atoms, and alkyl acrylates or alkyl methacrylates having an alkyl group of from about 8 to 60 carbon atoms, and
B. from about 50% to 95% by weight based upon the total weight of the composition of at least one fatty acid selected from the group consisting of natural or synthetic fatty acids containing from about 12 to 48 carbon atoms, wherein the fatty acid is compatible with the polymer and wherein the composition is a solid at 20.degree. C., but starts to become fluid between about 50.degree. C. and 95.degree. C.

4 more elements

Facts

Application

08/096,523Filed 22 Jul 1993

Granted

13 Feb 1996

Term ends

Not estimatedThe source records don’t support an estimate.

Classification10 codes

D21H 19/20
Applied in a form other than the aqueous solution defined in group D21H19/12: comprising macromolecular compounds obtained by reactions only…
C08K 5/09
Oxygen-containing compounds: carboxylic acids; Metal salts thereof; Anhydrides thereof
Y10T 428/1303
Hollow or container type article [e.g., tube, vase, etc.]: paper containing [e.g., paperboard, cardboard, fiberboard, etc.]
Y10T 428/1307
Paper containing [e.g., paperboard, cardboard, fiberboard, etc.]: bag or tubular film [e.g., pouch, flexible food casing, envelope, etc.]

Abstract

Claims12