Flexible to rigid nanoporous polyurethane-acrylate (PUAC) type materials for structural and thermal insulation applications
AssigneeThe Curators of the University of Missouri
InventorsNicholas Leventis, Chariklia Sotiriou-Leventis, Abhishek Bang
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Abstract
Novel urethane-acrylate (UAC) Star monomers and polyurethane-acrylate (PUAC) aerogel polymers derived therefrom are described herein, along with other novel, related monomers and polymers. Also described herein are processes for preparing the UAC Star monomers, the PUAC aerogel polymers, and the other related monomers and polymers. The PUAC and related polymers herein are useful in various applications including in structural and thermal insulation.
Claims29
A nanoporous material comprising a polyurethane-acrylate polymer formed by the polymerization of a urethane-acrylate star monomer of the formula (I):
- in the presence of a polymerization catalyst at 60° C. for 2-4 h, to give a wet gel, followed by aging of the wet gel for 24 h at 60° C., washing five times with acetone for 8 h per wash, and drying with supercritical fluid CO2;
- wherein the nitrogen atoms of the urethane moieties in the urethane-acrylate star monomer of the formula (I) are independently attached to their respective aryl rings at the 2, 3, or 4-positions of the aryl rings;
- wherein each of W, X, and Y independently represents a C1-C6 straight chain alkyl group or a C1-C6 branched alkyl group;
- wherein each of R1-R9 is independently a hydrogen, a C1-C6 straight chain alkyl group, or a C1-C6 branched alkyl group;
- and,
- wherein the material is an aerogel.
A nanoporous material comprising a polyurethane-acrylate polymer formed by the copolymerization of a urethane-acrylate star monomer of the formula (I):
- with a polymerization chain extender, in the presence of a polymerization catalyst at 60° C. for 2-4 h, to give a wet gel, followed by aging of the wet gel for 24 h at 60° C., washing five times with acetone for 8 h per wash, and drying with supercritical fluid CO2;
- wherein the nitrogen atoms of the urethane moieties in the urethane-acrylate star monomer of the formula (I) are independently attached to their respective aryl rings at the 2, 3, or 4-positions of the aryl rings;
- wherein each of W, X, and Y independently represents a C1-C6 straight chain alkyl group or a C1-C6 branched alkyl group;
- wherein each of R1-R9 is independently a hydrogen, a C1-C6 straight chain alkyl group, or a C1-C6 branched alkyl group;
- and,
- wherein the material is an aerogel.
A nanoporous material comprising a polyurethane-acrylate polymer of the formula (II):
- wherein the nitrogen atoms of the urethane moieties are independently attached to their respective aryl rings at the 2, 3, or 4-positions of the aryl rings;
- wherein each of W, X, and Y independently represents a C1-C6 straight chain alkyl group or a C1-C6 branched alkyl group;
- wherein each of R1-R9 is independently a hydrogen, a C1-C6 straight chain alkyl group or a C1-C6 branched alkyl group;
- wherein n is an integer greater than 1;
- and
- wherein the material is an aerogel.
Dependencies are inferred from the claim text.