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US 8,273,435 B2Granted
Polyol coatings, articles, and methods
AssigneePolymer Ventures, Inc.
InventorsChristopher B. Murphy, Jon O. Fabri, Robert P. Mahoney
Life of this patent
Estimating the term…
Abstract
Disclosed herein is an environmentally safe, grease and/or adhesion resistant article comprising an absorbent substrate, a cross-linking agent, and a polymer; wherein the substrate is first coated with the cross-linking agent and is then coated with the polymer.
Claims32
An article comprising:
- a water-absorbent substrate having at least a first surface and a second surface,
- a continuous coating consisting of a borate cross-linked polyol coating polymer absorbed in and on the first surface, the cross-linked coating polymer being a reaction product from the addition of about 0.01 g/m2 to about 60 g/m2 of a polyol coating polymer to the first surface, the first surface having first been coated with about 0.01 g/m2 to about 20 g/m2 of a borate cross-linking agent prior to the addition of the coating polymer wherein the mass ratio of polyol to borate is in the range of about 1:10 to about 10:1, and a pressure sensitive adhesive contacting the cross-linked polymer.
An article comprising
- a water-absorbent substrate having a plurality of surfaces;
- and
- a continuous coating consisting essentially of about 0.1 g to about 80 g of a cross-linked polyol coating polymer per square meter of coated surface, the cross-linked polyol coating polymer mechanically and chemically adhered to the surface and having a percentage of polymer cross-linking higher at a substrate/polymer interface than at a coating polymer surface farthest away from the substrate/polymer interface, and the borate cross-linked polyol coating polymer consisting essentially of a reaction product from the addition of the polyol coating polymer to one of the plurality of surfaces, the one of the plurality of surfaces having first been coated with the borate cross-linking agent prior to the addition of the polyol coating polymer, wherein the mass ratio of polyol to borate is in the range of about 1:10 to about 10:1.
A method of applying a cross-linked coating polymer to a surface comprising:
- applying a borate cross-linking agent to the surface in an amount of about 0.01 g/m2 to about 20 g/m2;
- and then
- applying a coating polymer, consisting of a polyol, to the borate cross-linking agent applied surface in an amount of about 0.01 g/m2 to about 60 g/m2;
- wherein the cross-linking agent reacts with the polyol and forms a continuous grease-resistant coating in and on the surface, wherein the mass ratio of polyol polymer to borate is in the range of about 1:1 to about 8:1.
1 more element
A method comprising:
- applying a borate cross-linking agent to fibers;
- and
- forming the fibers into a water-absorbent substrate having a first surface and a second surface, wherein an amount of cross-linking agent on the first surface comprises about 0.01 g/m2 to about 20 g/m2;
- and then
- applying about 0.1 g/m2 to about 60 g/m2 of a coating polymer consisting of a polyol to the first surface of the water-absorbent substrate, to achieve a cross-linking agent/coating polymer contact sufficient to cross-link the coating polymer in and on at least a portion of the fibers such that the coating polymer consists of the cross-linked polyol polymer.
2 more elements
A method of coating paper with a grease and adhesion resistant polyol coating polymer, while minimizing the amount of a coating polymer required to achieve a predetermined degree of grease resistance, comprising:
- treating a surface of the paper with about 0.01 g/m2 to about 20 g/m2 of a borate cross-linking agent for the coating polymer to form a cross-linking agent treated surface;
- then
- applying to the borate cross-linking agent treated surface a coating polymer consisting of a polyol at a coverage of about 0.01 g/m2 to about 60g/m2 of the coating polymer;
- and then
- cross-linking the coating polymer with the borate in and on the paper, wherein a ratio of the amounts by weight of coating polymer to cross-linking agent is in a range of about 1:1 to about 8:1.
2 more elements
A method of providing grease and/or adhesion resistance to a water-absorbent substrate comprising:
- applying a uniform application of an aqueous solution of a borate to a surface of the water-absorbent substrate, wherein the borate is absorbed by the water-absorbent substrate to form a borate absorbed surface;
- and then
- applying, to the borate absorbed surface, a uniform application of a coating polymer consisting of a polyol in an amount of about 0.1 g/m2 to about 60 g/m2 of the borate absorbed surface based on the total weight of the coating polymer, selected from the group consisting of polyvinyl alcohol, polyvinyl alcohol copolymer, polysaccharide, polysaccharide copolymer, and a mixture thereof, thereby cross-linking the polyol and forming a cross-linked coating polymer surface, wherein a percentage of polymer cross-linking is a gradient such that the polymer cross-linking is highest at the substrate/polymer interface and decreases toward the coating polymer surface farthest away from the substrate/polymer interface, and wherein the mass ratio of polyol to borate is in the range of about 1:10 to about 10:1.
Dependencies are inferred from the claim text.