Aqueous thermo-thickening resin solutions
First Claim
1. An aqueous thermo-thickening resin solution for a non-coating application, comprising:
- a resin comprising a hydrophobic unit and a hydrophilic unit, wherein a ratio of a number average molecular weight of all of the hydrophobic units to all of the hydrophilic units in the resin is less than 2.5 and wherein the resin is a reaction product consisting of;
(A) an epoxy pre-polymer, consisting of, in reacted form an aromatic polyol, which is bisphenol A (Bis A), an epoxy functional material, which is diglycidyl ether of bisphenol A (DGEBA), and optionally a catalyst, and(B) a di- or polyamine, which is a polyether amine;
water; and
optionally, a salting component;
the solution being substantially free of a cross-linking agent;
wherein the solution exhibits a reversible dynamic viscosity increase of at least 100 times in a temperature range from 20°
C. to <
100°
C. at ambient pressure.
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Accused Products
Abstract
Provided are aqueous resin solutions having unique rheologies and products incorporating the same. The water-based materials provided herein are thermo-thickening, and the materials increase dramatically in viscosity (at least 100 times) in a desired temperature range increase (20 C to <100 C) at ambient pressure. Suitable resins comprising a hydrophobic group and a hydrophilic group may be selected from an epoxy resin, a phenol-formaldehyde resin, a polyurethane resin, an acrylic resin, a polyester resin, an acrylic-urethane resin, a melamine resin, a melamine-formaldehyde resin, an amino resin, and combinations thereof. A specific epoxy functional resin/polymer suitable for the resin solutions are prepared by reacting (A) an epoxy pre-polymer of (1) one or more polyols and (2) one or more epoxy functional materials with (B) a di- or polyamine, thereby forming the aqueous thermo-thickening resin solution. The resin solutions are substantially free of cross-linking agents.
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Citations
13 Claims
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1. An aqueous thermo-thickening resin solution for a non-coating application, comprising:
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a resin comprising a hydrophobic unit and a hydrophilic unit, wherein a ratio of a number average molecular weight of all of the hydrophobic units to all of the hydrophilic units in the resin is less than 2.5 and wherein the resin is a reaction product consisting of; (A) an epoxy pre-polymer, consisting of, in reacted form an aromatic polyol, which is bisphenol A (Bis A), an epoxy functional material, which is diglycidyl ether of bisphenol A (DGEBA), and optionally a catalyst, and (B) a di- or polyamine, which is a polyether amine; water; and optionally, a salting component; the solution being substantially free of a cross-linking agent; wherein the solution exhibits a reversible dynamic viscosity increase of at least 100 times in a temperature range from 20°
C. to <
100°
C. at ambient pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of making an aqueous thermo-thickening resin solution for a non-coating application, the method comprising:
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(I)forming a resin comprising a hydrophobic unit and a hydrophilic unit, wherein a ratio of a number average molecular weight of all of the hydrophobic units to all of the hydrophilic units in the resin is less than 2.5 and wherein the resin is a reaction product consisting of; (A) an epoxy pre-polymer, consisting of, in reacted form, an aromatic polyol, which is bisphenol A (Bis A), an epoxy functional material, which is diglvcidvl ether of bisphenol A (DGEBA), and optionally a catalyst, and (B) a di- or polyamine, which is a polyether amine; and (II) dissolving the resin in water, and optionally, a salting component, in the substantial absence of a cross-linking agent; thereby forming the aqueous thermo-thickening resin solution that exhibits a reversible kinematic viscosity increase of at least 100 times in a temperature range of 20°
C. to <
100°
C. at ambient temperature.
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Specification