Composition comprising a multistage polymer and a (meth)acrylic polymer, its method of preparation and its use

A polymer composition (PC1) in a form of a polymer powder comprising:

• a) one stage (A) comprising a polymer (A1) having a glass transition temperature of less than 10° C.,
• b) one stage (B) comprising a polymer (B1) having a glass transition temperature of at least 60° C., and
• c) a polymer (C1) having a glass transition temperature of at least 30° C., said polymer (C1) represents at most 40 wt % of the composition based on a), b) and c) only,
• wherein at least the component a) and the component b) of polymer composition (PC1) are part of a multistage polymer (MP1),
• wherein the polymer (C1) has a mass average molecular weight Mw between 10,000 g/mol and 500,000 g/mol and
• wherein the polymer composition (PC1) in the form of a polymer powder has a total intruded volume of at least 1.2 ml/g and at most 10 ml/g as measured by mercury porosimetry and has a cumulative intrusion for a pore size above 10 μm of at least 0.9 ml/g and an incremental intrusion between a pore size from 1 μm to 0.1 μm is at least 0.05 ml/g.