Storage-stable resin-modified glass ionomer cement

A composition for use in a multicomponent resin-modified glass ionomer cement, the composition comprising

• at least one inhibitor selected from the group consisting of 2,6-di(tert-butyl)hydroxytoluene, hydroquinone monomethyl ether, a 2,2-diphenyl-1-picrylhydrazyl radical, a galvinoxyl radical, a triphenylmethyl radical and a 2,2,6,6-tetramethylpiperidinyl-1-oxyl radical,
• a basic glass composition (G) comprising aluminum fluorosilicate glass,
• one or more radically polymerizable organic monomers (M) comprising monomers with at least two ethylenic groups (M1) and hydroxyl compounds with at least one ethylenic group (M2), and
• as constituent of a polymerization initiator system
• one or more compounds (A) selected from the group consisting of ascorbic acid, salts of ascorbic acid, isomers of ascorbic acid, salts of isomers of ascorbic acid, esters of isomers of ascorbic acid and ethers of isomers of ascorbic acid
• and
• one or more compounds (S) selected from the group consisting of sulfinic acids, salts of sulfinic acids and salts of organoboron compounds,
• wherein, directly after mixing the ingredients, the composition exhibits a viscosity which is smaller at the most by the factor 5, than the viscosity of the composition after being stored at 37° C. for 6 weeks, wherein:
• the composition is a liquid or a paste,
• ascorbic acid and/or sodium isoascorbate is present in a total amount of 0.1 to 1% by weight,
• sodium toluenesulfinate and/or sodium tetraphenylborate is present in a total amount of 0.01 to 1% by weight,
• the monomers with at least two ethylenic groups (M1) comprise urethane dimethacrylate and/or triethylene glycol dimethacrylate and/or glycerol 1,3-dimethacrylate in a total amount of 5 to 20% by weight,
• the aluminum fluorosilicate glass is present in an amount of 50 to 75% by weight, and
• the hydroxyl compounds with at least one ethylenic group (M2) comprise 2-hydroxyethyl methacrylate and/or 2-hydroxypropyl methacrylate in a total amount of 10 to 30% by weight, wherein the percentage values are based on the total weight of the composition.