Adhesive composition
An adhesive composition, in particular a tile adhesive, includes: a) 10-50 wt. % of a hydraulic binder, b) 20-60 wt. % of lightweight aggregates, c) 10-25 wt. % of a polymer.
1 . An adhesive composition, comprising:
a) 10-50 wt. % of a hydraulic binder,
b) 20-60 wt. % of lightweight aggregates,
c) 10-25 wt. % of a polymer,
wherein the hydraulic binder comprises Portland cement and sulphoaluminate cement with a weight ratio of Portland cement to sulphoaluminate cement from 4-10.
2 . The adhesive composition according to claim 1 , wherein the hydraulic binder comprises two different types of Portland cements.
3 . The adhesive composition according to claim 1 , wherein the composition comprises 10-40 wt. % Portland cement and 1-15 wt. % sulphoaluminate cement as hydraulic binders.
4 . The adhesive composition according to claim 1 , wherein a particle density of the lightweight aggregates is from 100-2,000 kg/m 3 .
5 . The adhesive composition according to claim 1 , wherein the lightweight aggregates comprise rubber particles and/or porous particles, whereby, a particle size of the lightweight aggregates is from 0.01-2 mm.
6 . The adhesive composition according to claim 5 wherein the composition comprises 30-60 wt. %, of rubber particles and 1-15 wt. % of porous particles as lightweight aggregates.
7 . The adhesive composition according to claim 1 , wherein the polymer is a water soluble or water redispersible polymer.
8 . The adhesive composition according to claim 7 , wherein the polymer has a glass transition temperature of −45-10° C.
9 . The adhesive composition according to claim 1 , comprising:
20-30 wt. % of Portland cement;
3-10 wt. % of calcium sulphoaluminate cement;
optionally 4-8 wt. % latent hydraulic and/or pozzolanic binder materials;
35-55 wt. % of rubber particles;
3-10 wt. % of porous inorganic particles;
10-25 wt. % of a water soluble or water redispersible polymer;
0-5 wt. %, of one or more additives; and
wherein a proportion of aggregates with a particle density >2,000 kg/m 3 is <5 wt. %, and
whereby all amounts are with respect to the total weight of the adhesive composition in dry state.
10 . A method for producing a processable adhesive composition, comprising the step of adding water to an adhesive composition according to claim 1 .
11 . A hardened adhesive composition obtainable by the method according to claim 10 .
12 . A structure comprising a cover element, whereby the cover element is fixed to the structure with an adhesive composition according to claim 1 .
13 . A method comprising applying an adhesive composition according to claim 1 to a tile as a tile adhesive.
14 . A method comprising applying an adhesive composition according to claim 1 on floors, walls, or ceilings of a building or facility for acoustic damping, noise reduction and/or vibration reduction.