The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 14, 2013
Filed:
Jun. 14, 2010
Gordon Blackwell, Constance, DE;
Stefan Brugger, Radolfzell, DE;
Denise Achilles, Constance, DE;
Jorg Kempter, Constance, DE;
Gordon Blackwell, Constance, DE;
Stefan Brugger, Radolfzell, DE;
Denise Achilles, Constance, DE;
Jorg Kempter, Constance, DE;
DENTSPLY International Inc., York, PA (US);
Abstract
A hardening composition comprising a particulate glass, said glass comprising 10-35% by weight of silica, 10-35% by weight of alumina, 3-30% by weight of zinc oxide, 4-30% by weight of POand 3-25% by weight of fluoride, and an acidic copolymer reactive with the particulate glass under aqueous conditions. An aqueous polymer solution comprising 10 to 65% by weight of the acidic copolymer of the hardening composition with a mean molecular weight of from 50,000 to 200,000, obtainable by a process comprising the copolymerization of a mixture containing acrylic acid and an acrylic acid ester (I) and/or a compound of the formula (II) and, optionally, a compound of the formula (III): wherein k is an integer of from 1 to 5; h is an integer from 0 to (5−k); n is an integer of from 1 to 3; R1 is hydrogen or a C1-6 alkyl group, and; R2 and R3 independently represent hydrogen, a C1-6 alkyl group or a moiety of the following formula (IV): wherein m independently is an integer of from 0 to 3, and L is —CH— or —CH═CH—; provided that at least one of R1, R2 or R3 is not hydrogen.