Two-phase compositions
View Patent ↗Disclosed is a composition comprising a hydrophobic polymer phase and a water-swollen superabsorbent polymer phase. Also disclosed is a two component system for preparing a composition comprising a hydrophobic polymer phase and a water-swollen superabsorbent polymer phase. The first component is an emulsion of the hydrophobic polymer; the second component comprises the superabsorbent polymer; and the first and second components form the composition when mixed.
1. A composition comprising a hydrophobic polymer phase and a water-swollen superabsorbent polymer phase, wherein the hydrophobic polymer phase and the water-swollen superabsorbent polymer phase are each homogeneous, the hydrophobic polymer phase and the water-swollen superabsorbent polymer phase each has uniform physical and chemical properties, the hydrophobic polymer phase is continuous and the water swollen superabsorbent polymer phase is discrete, and the hydrophobic polymer phase is at least 60% by weight of the composition, wherein the composition is substantially free of cement when the superabsorbent polymer is cationic, and wherein the composition is substantially free of water from a bodily fluid.
2. The composition of claim 1 the hydrophobic polymer phase comprises a hydrophobic polymer dissolved in an oil or plasticizer.
3. The composition of claim 1 wherein the superabsorbent polymer is a maleic anhydride/vinyl ether copolymer; poly(acrylic acid); a copolymer of acrylic acid and methacrylic acid; a copolymer of methacrylic acid and starch modified polyacrylic acid; or an alkali metal salt thereof.
4. The composition of claim 1 wherein the superabsorbent polymer is a copolymer of hydrolyzed maleic anhydride and a vinyl ether; or an alkali metal salt thereof.
5. The composition of claim 1 wherein the hydrophobic polymer is natural rubber, styrene butadiene rubber or acrylic.
6. The composition of claim 1 wherein the superabsorbent polymer comprises acidic or basic functional groups.
7. The composition of claim 1 wherein the composition additionally comprises one or more components selected from a reinforcing filler, a non-reinforcing filler, a pigment, a surfactant, an antioxidant, a UV stabilizer, a fiber, a mold release agent, a lubricant, a void, a tackifier, a coagulant, a coascervant for emulsions, biocide, coalescing agent or an organic solvent.
8. A profile, an adhesive composition, a coating, a sealant, or an article comprising a two phase composition, wherein the hydrophobic polymer phase and the water-swollen superabsorbent polymer phase are each homogeneous, wherein the hydrophobic polymer phase and the water-swollen superabsorbent polymer phase each has uniform physical and chemical properties, wherein the hydrophobic polymer phase is at least 60% by weight of the profile, composition, coating, sealant or article, and wherein said two phase composition comprises a continuous hydrophobic polymer phase and a discrete water-swollen superabsorbent polymer phase.
9. The article of claim 8 wherein two phase composition is vapor permeable.
10. The profile or coating of claim 8 wherein the profile or coating is a waterstop.
11. An aqueous emulsion comprising a hydrophobic polymer and a polymer which becomes superabsorbent or increases its water absorbing capacity at least two fold when the temperature is adjusted above or below a threshold temperature and wherein the temperature of the emulsion is such that the polymer is non-superabsorbing or pre-water swollen.
12. A composition comprising a hydrophobic polymer phase and a water-swollen superabsorbent polymer phase, wherein the hydrophobic polymer phase and the water-swollen superabsorbent polymer phase are each homogeneous, the hydrophobic polymer phase and the water-swollen superabsorbent polymer phase each has uniform physical and chemical properties, the hydrophobic polymer phase is at least 60% by weight of the composition, the hydrophobic polymer phase is continuous and the water swollen superabsorbent polymer phase is discrete and wherein said composition is prepared from a two component system, wherein the first component is an emulsion of the hydrophobic polymer and the second component comprises the superabsorbent polymer, comprising the step of mixing the first component with the second component.
13. The composition of claim 1 , wherein the hydrophobic polymer phase is formed from coalesced hydrophobic polymer particles.
14. The composition of claim 8 , wherein the hydrophobic polymer phase is formed from coalesced hydrophobic polymer particles.
15. The composition of claim 12 , wherein the hydrophobic polymer phase is formed from coalesced hydrophobic polymer particles.
16. A composition consisting essentially of a hydrophobic polymer phase and a water-swollen superabsorbent polymer phase, wherein the hydrophobic polymer phase and the water-swollen superabsorbent polymer phase are each a homogeneous portion of the composition, the hydrophobic polymer phase and the water-swollen superabsorbent polymer phase each has uniform physical and chemical properties, the hydrophobic polymer phase is continuous and the water swollen superabsorbent polymer phase is discrete, and the hydrophobic polymer phase is at least 60% by weight of the composition, wherein the composition is substantially free of cement when the superabsorbent polymer is cationic, and wherein the composition is substantially free of water from a bodily fluid.