Kit of parts, method of producing and use thereof

1. A kit of parts comprising part A and part B, part A comprising:

at least one polymerizable component with an acid group, wherein the at least one polymerizable component is present in an amount from about 5 to about 20 wt.-%,

an initiator or an initiator system, wherein the initiator or the initiator system is present in an amount from about 1 to about 5 wt.-%, part B comprising:

at least one activator, wherein the activator is present in an amount from about 0.1 to about 0.5 wt.-%, and

at least one film former with a molecular weight of at least about 1,000, wherein the film former is present in an amount from about 0.2 to about 1.5 wt.-%, and wherein the at least one film former is located

on the surface of an applicator or packaging material, or

on the surface of a well of a packaging device,

and further wherein the activator is dissolved or dispersed in the film former;

the kit further comprising at least one of the following components, contained in part A, part B, or part A and part B, comprising:

one or more solvents, wherein the one or more solvents are present in an amount from about 5 to about 20 wt.-%,

one or more adjuvants, wherein the one or more adjuvants are present in an amount from about 0 to about 1 wt.-%,

one or more fillers: wherein the one or more fillers are present in an amount from about 0 to about 20 wt.-%,

wherein wt.-% is with respect to the weight of the whole composition.

2. The kit according to claim 1 , wherein the polymerizable component of part A comprises a polymerizable moiety selected from an acrylate, (meth)acrylate, epoxy-functional moiety and combinations thereof, and wherein the acid group is selected from a carboxylic acid, phosphoric acid, sulphonic acid moiety and combinations thereof.

3. The kit according to claim 1 , wherein the initiator or initiator system comprises at least one of the following elements: oxidizing agent, a reducing agent, a sensitizing agent, onium salt, electron donor or a combination of two or more of these elements.

4. The kit according to claim 1 , wherein the activator comprises at least one of the following moieties: barbituric acid, barbituric acid salt, thiobarbituric acid, thiobarbituric acid salt, sulfinic acid, sulfinic acid salt or sulfinic acid ester.

5. The kit according to claim 1 , wherein the film former is selected from the group consisting of natural film formers, semi-synthetic film formers, cellulose derivatives, poly(meth)acrylates, vinyl polymers, polyurethanes, mixtures and combinations thereof.

6. The kit according to claim 1 , the thickness of a film produced by the film former being in a range from about 0.5 μm to about 100 μm.

7. The kit according to claim 1 , wherein the components of part A and part B are mixed to produce an adhesive composition.

8. The kit according to claim 7 , wherein the adhesive composition is suitable to be applied to the surface of a tooth or wherein the adhesive composition is a dental adhesive.

9. The kit according to claim 1 , further comprising a part C, part C being selected from a dental cement, a dental filling material, a dental crown or dental bridge, a dental sealant, a dental core build-up material, an orthodontic adhesive and combinations and mixtures thereof.

10. A method for producing the kit as described in claim 1 , the method comprising the steps of:

bringing the components contained in part B of the kit in contact with a surface,

drying the surface to form a film.

11. The kit according to claim 1 , wherein part A is not in contact with part B.