Patent ID: 11958990
Assignee: BASF COATINGS GMBH
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 8:
9. The mixer system as claimed in claim 1, wherein the at least one pigment-free component B further comprises an anionically stabilized binder (b-2b), wherein the anionically stabilized binder (b-2b) comprises at least one anionically stabilized polymer in dispersion in water and has a particle size of 100 to 500 nm, wherein the preparation of the polymer comprises the successive radical emulsion polymerization of three mixtures (A), (B), and (C) of olefinically unsaturated monomers, wherein
the mixture (A) comprises at least 50 wt % of vinylaromatic monomers, and a polymer prepared from the mixture (A) possesses a glass transition temperature of 10 to 65° C.,
the mixture (B) comprises at least one polyunsaturated monomer, and a polymer prepared from the mixture (B) possesses a glass transition temperature at −35 to 15° C., and
the mixture (C) comprises at least one anionic monomer, and a polymer prepared from the mixture (C) possesses a glass transition temperature of −50 to 15° C.,
and wherein
i. first the mixture (A) is polymerized,
ii. then the mixture (B) is polymerized in the presence of the polymer prepared under i., and
iii. thereafter the mixture (C) is polymerized in the presence of the polymer prepared under ii.