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US 11,110,037 B2Granted
Methods and compositions to stabilize a nanogel and dental compositions therefrom
AssigneeDENTSPLY SIRONA Inc.
InventorsXiaoming Jin, Bassam Usta, Christian Scheufler, Joachim E. Klee, Thomas Tigges, Kira Neuhaus, Jörg Brenneisen, Hui Lu
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Abstract
The present disclosure relates to methods and compositions to stabilize a nanogel and use of such nanogel as additives in dental compositions.
Claims40
A dental composition comprising a nanogel formed by a process comprising the steps of:
- (a) polymerizing by a thermal polymerization a mixture comprising
- (i) at least one comonomer having one ethylenically unsaturated group,
- (ii) at least one of a comonomer having two ethylenically unsaturated group and at least one comonomer having at least three ethylenically unsaturated groups,
- (iii) at least one chain transfer agent, and
- (iv) an initiator;
- at a reaction temperature to obtain a nanogel solution;
- and
- (b) terminating the polymerization by lowering the reaction temperature and quenching the nanogel solution with a radical scavenger;
- wherein the radical scavenger is present at a concentration such that nanogel solution has a thermal stability at storage for 7 days at 25° C.
6 more elements
A nanogel formed by a process comprising the steps of:
- (a) polymerizing by a thermal polymerization a mixture comprising:
- (i) at least one comonomer having one ethylenically unsaturated group
- (ii) at least one of a comonomer having two ethylenically unsaturated group and at least one comonomer having at least three ethylenically unsaturated groups
- (iii) at least one chain transfer agent, and
- (iv) an initiator;
- at a reaction temperature to obtain a nanogel solution;
- and
- (b) terminating the polymerization by lowering the reaction temperature and quenching the nanogel solution with a radical scavenger;
- wherein the radical scavenger is present at concentration such that nanogel solution has a thermal stability at storage for 7 days at 25° C.;
- wherein the nanogel is essentially free of macrogel.
7 more elements
A method of forming a nanogel, said method comprising:
- (a) polymerizing by a thermal polymerization a mixture comprising:
- (i) at least one comonomer having one ethylenically unsaturated group
- (ii) at least one of a comonomer having two ethylenically unsaturated group and at least one comonomer having at least three ethylenically unsaturated groups
- (iii) at least one chain transfer agent,
- (iv) an initiator;
- at a reaction temperature to obtain a nanogel solution;
- and
- (b) terminating the polymerization by lowering the reaction temperature and quenching the nanogel solution with a radical scavenger to form the nanogel;
- wherein the radical scavenger is present at concentration such that nanogel solution has a thermal stability at storage for 7 days at 25° C.
6 more elements
Dependencies are inferred from the claim text.