Chain extended urethane diacrylate and dental impression formation

A new impression material for application to mammalian tissue and curing in contact therewith to set the impression thereof;

• said impression material comprising free radical initiated polymerizable resin present in an amount of about 5 to 95% by weight of the total composition;
• alkyl benzensulfonyl titanate present in an amount of about 0.001 to about 2% by weight of the total composition;
• a polymerization initiator present in an amount of about 0.001 to about 10% by weight of polymerizable resin;
• and filler present in an amount of about 5 to 95% by weight of the total composition.

A soft denture liner comprising a compound of the general formula:

• R.sub.1 --{A}--R.sub.1
• wherein
• R.sub.1 is ##STR9## and each R.sub.1 may be the same or different R.sub.3 is H, alkyl of 2-10 carbons, substituted alkyl of 2-10 carbons, aryl of 6-14 carbons, substituted aryl of 6-14 carbons, F or CN and R3 may be the same or different in each position
• R.sub.4 is a divalent hydrocarbon radical or divalent substituted hydrocarbon radical and may be straight or branched chain or cyclic or a combination thereof having from 2-10 carbons and
• A is a polyurethane, polyether or polyester group, from 5 to 95 percent by weight fillers and a photoinitiator, wherein substituted represents a chemical substituent selected from the group consisting of halogen, lower alkyl having from 1 to 6 carbon atoms, oxy lower alkyl having from 1 to 6 carbon atoms, silyl lower alkyl having from 1 to 6 carbon atoms, phenyl, halophenyl, alkoxyphenyl, trihalomethyl and dihalomethyl and wherein said composition has a molecular weight of about 500-4000 and a viscosity suitable for use as a soft denture liner and is non-toxic in use in the oral cavity, stable in storage for at least one (1) month as a one-component composition when actinic light free, and assumes a permanent elastomeric memory suitable for use as a soft denture liner when exposed to light filtered to limited wavelengths substantially within the visible light range for one (1) minute to a depth of one (1) inch.

An elastomeric composition for use in dentistry comprising a compound of the general formula:

• R.sub.1 --{A}--R.sub.2
• wherein
• R.sub.1 is ##STR13## R.sub.2 is ##STR14## R.sub.3 is H, alkyl of 2-10 carbons, substituted alkyl of 2-10 carbons, aryl of 6-14 carbons, substituted aryl of 6-14 carbons, F, or CN and R.sub.3 may be the same or different in each position;
• R.sub.4 is a divalent hydrocarbon radical or divalent substituted hydrocarbon radical and may be straight or branched chain or cyclic or a combination thereof from 2-10 carbons;
• and
• A is a polyurethane, polyether or polyester group;
• a photoinitiator and filler,
• wherein substituted represents a chemical substituant selected from the group consisting of halogen, lower alkyl having from 1 to 6 carbon atoms, oxy lower alkyl having from 1 to 6 carbon atoms, silyl lower alkyl having from 1 to 6 carbon atoms, phenyl, halophenyl, alkoxyphenyl, trihalomethyl and dihalomethyl.

A soft denture liner composition comprising a compound of the general formula:

• R.sub.1 --{A}--R.sub.1
• wherein
• R.sub.1 is ##STR15## and each R.sub.1 may be the same or different R.sub.3 is H, alkyl of 2-10 carbons, substituted alkyl of 2-10 carbons, aryl of 6-14 carbons, substituted aryl of 6-14 carbons, F or CN and R.sub.3 may be the same or different in each position
• R.sub.4 is a divalent hydrocarbon radical or divalent substituted hydrocarbon radical and may be straight or branched chain or cyclic or a combination thereof having from 2-10 carbons and
• A is a polyurethane, polyether or polyester group
• a photoinitiator and filler,
• wherein substituted represents a chemical substituent selected from the group consisting of halogen, lower alkyl and having 1 to 6 carbon atoms, oxy lower alkyl and having 1 to 6 carbon atoms, silyl lower alkyl and having 1 to 6 carbon atoms, phenyl, halophenyl, alkoxyphenyl, trihalomethyl, and dihalomethyl.