Dental composition

A process for the preparation of a polymerizable composition for use in a dental composition, which comprises reacting a mixture comprising:

• (a) x equivalents of one or more compounds of the following formula (I):
• wherein
• R1 represents a hydrogen atom or a linear C1-6 alkyl group, or a branched or cyclic C3-6 alkyl group;
• (b) y equivalents of a compound of the following formula (II):
• HO-L-OH (III)
• wherein
• L represents a divalent organic linker group which may contain one or more monovalent or divalent organopolysiloxane groups and/or one or more monovalent or divalent perfluorohydrocarbyl groups;
• and
• (c) optionally z equivalents of one or more compounds of the following formula (IV) or (V):
• R2—COOH (IV)
• R2—OH (V)
• wherein
• R2 independently is an organic group which may contain one or more monovalent or divalent organopolysiloxane groups and/or one or more monovalent or divalent perfluorohydrocarbyl groups, and/or one or more polymerizable groups selected from (meth)acryloyl groups, (meth)acrylamido groups, vinylether groups, vinylester groups, aziridine, epoxide groups and oxetane groups,
• wherein 0.05≤x/y≤0.66, and 2y−2x≤z≤1.5(2y−2x), wherein x, y, and z are the molar equivalents of components (a), (b) and (c).

A polymerizable composition obtained by a process of comprising reacting a mixture comprising:

• (a) x equivalents of one or more compounds of the following formula (I):
• wherein
• R1 represents a hydrogen atom or a linear C1-6 alkyl group, or a branched or cyclic C3-6 alkyl group;
• (b) y equivalents of a compound of the following formula (II):
• HO-L-OH (III)
• wherein
• L represents a divalent organic linker group which may contain one or more monovalent or divalent organopolysiloxane groups and/or one or more monovalent or divalent perfluorohydrocarbyl groups;
• and
• (c) optionally z equivalents of one or more compounds of the following formula (IV) or (V):
• R2—COOH (IV)
• R2—OH (V)
• wherein
• R2 independently is an organic group which may contain one or more monovalent or divalent organopolysiloxane groups and/or one or more monovalent or divalent perfluorohydrocarbyl groups, and/or one or more polymerizable groups selected from (meth)acryloyl groups, (meth)acrylamido groups, vinylether groups, vinylester groups, aziridine, epoxide groups and oxetane groups,
• wherein 0.05≤x/y≤0.66, and 2y−2x≤z≤1.5(2y−2x), wherein x, y, and z are the molar equivalents of components (a), (b) and (c).

A method of using a polymerizable macromonomer of the formula (VI)

• wherein
• m is an integer of from 0 to 20,
• o is an integer of from 0 to 20,
• p is an integer of from 1 to 40,
• R1 represents a hydrogen atom or a linear C1-6, branched C2-6 or cyclic C3-6 alkyl group,
• R3 represents a linear C1-6, or a branched or cyclic C3-6 alkyl group,
• R4 represents a vinyl group, a vinylether group, a vinylester group, an aziridine group, an oxetane group or a represents a linear C1-6, or a branched or cyclic C3-6 alkyl group, and
• wherein n is an average chain length which is in the range of from 1 to 50;
• the method comprising:
• (a) dissolving the polymerizable macromonomer of the formula (VI) in one or more vinyl compounds selected from vinyl ethers, vinyl esters, vinylsiloxanes, (meth) acrylamides and 1-alkenes having from 4 to 20 carbon atoms to form a mixture, and
• (b) mixing a polymerization initiator system to the mixture to form a dental composition.