Composition comprising a modified photo-dimerizable polymer and an alkaline agent and/or an amino alkoxysilane derivative and treatment method implementing the composition

A composition comprising:

• at least one photo-crosslinkable polymer comprising at least one photo-dimerizable pendant group;
• and
• at least one alkaline agent and/or amino alkoxysilane derivative present in an amount ranging from 0.01% to 10% by weight relative to the total weight of the composition,
• wherein the pH of the composition is greater than or equal to 7.

A process for treating keratin materials comprising the following steps:

• a) application of a composition to the keratin materials, the composition comprising:
• at least one photo-crosslinkable polymer comprising at least one photo-dimerizable pendant group;
• and
• at least one alkaline agent and/or amino alkoxysilane derivative present in the composition in a content ranging from 0.01% to 10% by weight relative to the total weight of the composition,
• wherein the pH of the composition is greater than or equal to 7;
• b) irradiation of said composition on the keratin materials to crosslink the polymer.