Process for manufacturing a waterproofing membrane
The present invention relates to a process for manufacturing a waterproofing membrane comprising: a preparation of a composition dispersed in a solvent; coating a reinforcement layer by application of said composition on one side of the reinforcement layer; an evaporation of said solvent; having the coated reinforcement layer dried; and an application of a bituminous mass on another side of said reinforcement layer, characterized in that, during the preparation of the composition, the composition is dispersed in a solvent chosen in the group consisting of a solvent other than water or water. The present invention relates also to a composition for a waterproofing membrane.
1. A process for manufacturing a waterproof membrane comprising:
preparing a composition having a Newtonian viscosity and comprising an acrylic polymer having aliphatic side chains of fewer than 10 carbon atoms, cristobalite, and titanium dioxide dispersed in a solvent other than water;
coating a reinforcement layer by application of said composition having a Newtonian viscosity on one side of the reinforcement layer;
evaporating said solvent out of said composition having a Newtonian viscosity;
drying the reinforcement layer to provide a coated reinforcement layer; and
applying a bituminous mass on another side of said coated reinforcement layer.
2. The process according to claim 1 , characterized in that the composition further comprises talc.
3. The process according to claim 1 , characterized in that, prior to preparing the composition, the cristobalite is obtained by heating quartz to substantially 1500° C.
4. The process according to claim 1 , characterized in that the composition further comprises an additive composed by a core of titanium dioxide covered by calcium carbonate.
5. The process according to claim 1 , characterized in that the composition further comprises calcium carbonate.
6. The process according to claim 1 , characterized in that the solvent other than water is chosen from the group consisting of dimethylformamid, methyl ethyl ketone and toluene.
7. A process for manufacturing a waterproof membrane comprising:
preparing a composition comprising an acrylic polymer having aliphatic side chains of fewer than 10 carbon atoms and titanium dioxide dispersed in water in the presence of cristobalite;
coating a reinforcement layer by application of said composition on one side of the reinforcement layer;
evaporating the water out of said composition;
drying the reinforcement layer to provide a coated reinforcement layer; and
applying a bituminous mass on another side of said coated reinforcement layer.
8. The process according to claim 7 , characterized in that the composition further comprises talc.
9. The process according to claim 7 , characterized in that, prior to preparing the composition, the cristobalite is obtained by heating quartz to substantially 1500° C.
10. The process according to claim 7 , characterized in that the composition further comprises an additive composed by a core of titanium dioxide covered by calcium carbonate.
11. The process according to claim 7 , characterized in that the composition further comprises calcium carbonate.