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Low-emission dispersion paints, coating materials and synthetic resin dispersion plasters as well as processes for the preparation thereof
| Details |
Inventors: N olken, Ernst; Braun, Helmut; Lonitz, Michael;
Assignee: Hoechst AG (DE)
Primary Examiner: Smith; Jeffrey T.
Assistant Examiner:
Attorney, Agent or Firm: Bierman and Muserlian
Production of low-emission dispersion paints, coating materials and synthetic resin dispersion plasters in the form of aqueous preparations based on aqueous synthetic resin dispersion copolymers derived from olefinically unsaturated monomers, having a pigment volume concentration (PVC) of at least 60% and containing water, fillers, pigments, synthetic resin dispersion copolymers and conventional auxiliaries, wherein the synthetic resin dispersion copolymers have a content of 0.05 to 2% by weight of monomer units derived from special unsaturated hydrolyzable organic silicon compounds and the aqueous copolymer dispersions possess a minimum film-forming temperature (MFT) of <10.degree. C., preferably <5.degree. C. and especially <2.degree. C., the aqueous preparations according to the invention contain <0.1% by weight of volatile non-aqueous constituents, based on the total non-volatile part of the preparations, and the pH of the aqueous preparations is in the range from 5.5 to 10. |
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DETAILED DESCRIPTION We claim: 1.
A low emission dispersion paint, coating material and synthetic resin dispersion plaster in the form of aqueous preparations based on aqueous synthetic resin dispersion polymers derived from olefinically unsaturated monomers having a pigment volume concentration (PVC) of at least 60% and containing water, fillers, pigments, synthetic resin dispersion polymers and auxiliaries selected from the group of wetting agents, disperants, emulsifiers, protective colloids, thickeners, antifoams, dyes and preservatives, wherein the non-volatile part of the aqueous preparations contains 35 to 94% by weight of a filler, 2 to 30% by weight of pigment, 0.
1 to 10% by weight of an auxiliary and 4 to 35% by weight of synthetic resin dispersion copolymer, based on the total non-volatile part, the aqueous dispersion of which copolymer possesses a minimum film-forming temperature (MFT) of <10.
degree.
C.
, and the synthetic dispersion copolymer has a content of 0.
05 to 0.
4% by weight of monomeric units derived from unsaturated hydrolyzable organic silicon compounds of the formula ##STR3## in which R denotes an organic radical olefinically unsaturated in the .
sup.
.
omega.
-position and R.
sup.
1, R.
sup.
2 and R.
sup.
3 which may be identical or different, denote halogen or the group -OZ, Z denoting primary or secondary alkyl radicals or acyl radicals optionally substituted by alkoxy groups, or hydrogen, the content of volatile non-aqueous constituents of the aqueous preparations being 0.
1% by weight, based on the total non-volatile part, and the pH of the aqueous preparation being in the range from 5.
5 to 10 wherein after the copolymer having been copolymerized, residual monomers being removed by distillation.
2.
A paint as claimed in claim 1 wherein the synthetic resin dispersion copolymer contains monomeric units selected from the group consisting of vinyl esters, vinyl esters/ethylene, vinyl esters/vinyl chloride/ethylene, vinyl esters/vinyl versatates, vinyl esters/acrylic esters and acrylic esters/vinyl versatates/ethylene
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