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US 12,516,162 B2Granted
Siloxane exchange chemistry for vitrimers
AssigneeThe Regents of the University of California
InventorsChase Tretbar, Zhibin Guan, Jordan A. Castro
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Abstract
A vitrimer composition includes a first plurality of polymer backbones cross-linked with cross-linkers that include at least one siloxane moiety having formula 1: wherein R1, R2, R3, and R4 are each independently H or C1-6 alkyl. A catalyst that accelerates siloxane exchange is dispersed within the first plurality of polymer backbones.
Claims35
A vitrimer composition comprising:
- a plurality of polymer backbones that are cross-linked with cross-links that include at least one siloxane moiety having formula 1:
- wherein R1, R2, R3, and R4 are each independently H or C1-6 alkyl;
- and
- a catalyst that accelerates siloxane exchange dispersed within the plurality of polymer backbones, wherein the cross-links are present with a density of siloxane moieties from about 1×10−5 to about 1×10−3 mol/g.
1 more element
A vitrimer composition comprising:
- a plurality of polymer backbones that are cross-linked with cross-links that include at least one siloxane moiety having formula 1:
- wherein R1, R2, R3, and R4 are each independently H or C1-6 alkyl;
- and
- a catalyst that accelerates siloxane exchange dispersed within the plurality of polymer backbones, wherein the catalyst includes a complex of a fluoride salt with a chelating ligand, the catalyst including a complex of potassium fluoride with a 18-crown-6 crown ether.
1 more element
Dependencies are inferred from the claim text.