Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Reexamination Certificate
2001-03-05
2003-05-27
Dawson, Robert (Department: 1712)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
C524S005000, C524S008000, C524S027000, C524S262000, C524S266000, C524S315000, C524S457000, C524S458000, C524S459000, C524S460000, C524S506000, C524S539000, C524S650000, C516S053000, C516S055000, C516S067000, C516S072000, C516S075000, C516S906000, C516S914000, C516S917000, C516SDIG004, C516SDIG005, C516SDIG006, C516SDIG007, C525S102000
Reexamination Certificate
active
06569939
ABSTRACT:
BACKGROUND OF THE INVENTION
1) Field of the Invention
The invention relates to polymer compositions in the form of their aqueous dispersions or powders redispersible in water, processes for their preparation and their use for flexibilizing building materials, in particular sealing slurries.
2) Background Art
It is known that the extensibility of building materials can be improved by adding aqueous dispersions of thermoplastics. For example, flexible sealing slurries as used for sealing concrete consist of sand, cement, water and a thermoplastic polymer dispersed therein. The procedure adopted to date was to attempt to improve resilience by changing the polymer composition of the thermoplastics. WO-A 97/44289 teaches the use of copolymers based on vinyl acetate/ethylene copolymers which have a proportion of long-chain, optionally branched vinyl esters for improving the flexibilization. EP-A 857772 proposes, for improving the resilience of cement-free joint sealing compounds, modifying them with a mixture of thermoplastics and alkylalkoxysilanes. EP-A 590660 teaches that the water repellency of cement-free sealing compounds can be improved by adding thermoplastic polymers and branched organopolysiloxanes.
It was the object of the invention to develop a polymer composition by means of which, independently of the composition of the thermoplastic polymer, effective flexibilization of building materials, in particular of cement-containing building materials, is obtained.
SUMMARY OF THE INVENTION
The invention relates to a polymer composition for flexibilizing building materials, in the form of their aqueous dispersion or of powder redispersible in water, containing:
a) at least one water-insoluble, film-forming polymer of one or more ethylenically unsaturated monomers capable of free radical polymerization,
b) at least one compound from the group consisting of the water-soluble polymers of one or more ethylenically unsaturated monomers capable of free radical polymerization, and the ionic and nonionic emulsifiers, and
c) a mixture of at least two organosilicon compounds, at least one of which is an amino-functional organosilicon compound present in salt form.
REFERENCES:
patent: 3997306 (1976-12-01), Hedden
patent: 4455343 (1984-06-01), Temple
patent: 4477496 (1984-10-01), Das et al.
patent: 4548842 (1985-10-01), Pohl
patent: 5258443 (1993-11-01), Nield et al.
patent: 5681892 (1997-10-01), Weidner et al.
patent: 5753733 (1998-05-01), Eck et al.
patent: 1 340 267 (1998-12-01), None
patent: 0 590 660 (1994-04-01), None
patent: 0 754 737 (1997-01-01), None
patent: 0 857 772 (1998-08-01), None
patent: 97/44289 (1997-11-01), None
English Derwent Abstract AN 1998-416000 [36] corresponding to EPO 857 772.
English Derwent Abstract AN 1994-111125 [14] corresponding to EPO 590 660.
English Derwent Abstract AN 1998-010058 [02] corresponding to WO 97/44289.
Adler Klaus
Eck Herbert
Hopf Heinrich
Lutz Hermann
Brooks & Kushman P.C.
Dawson Robert
Robertson Jeffrey B.
Wacker-Chemie GmbH
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