Method for modifying expandable curing membranes for manufacturing tyres

A process for modifying an expandable curing bladder for a tire, which bladder has a surface intended to come into contact with a tire casing, which process comprises the following steps:

• a) applying to said surface a layer of a silicone rubber composition, the silicone rubber composition comprising a first liquid organopolysiloxane having repeating units (R2SiO2/2) and having two chain ends each bearing an alkenyl group, a second liquid organopolysiloxane having repeating units (R′HSiO2/2) and having two chain ends each bearing a group SiR′3SiO1/2 and a photoactivatable hydrosilylation catalyst, the symbols R, which may be identical or different, representing an alkyl, aryl or aralkyl group, the symbols R′, which may be identical or different, representing an alkyl group, the ratio between the number of units (R′HSiO2/2) and the number of alkenyl groups being greater than 1, and
• b) exposing the silicone rubber composition covering said surface to irradiation with ultraviolet-visible light.