Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1988-09-28
1990-02-27
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
523223, 106111, 106109, C08K 722
Patent
active
049047094
ABSTRACT:
A lightweight synthetic stucco composition is disclosed which includes a mixture comprising a latex emulsion, water and titanium dioxide as well as a number of additives for adjusting the properties of the mixture and further including an admixture of hollow microspheres and macrospheres, with the microspheres having a diameter of about 10 to 150 microns and the macrospheres having a diameter of from 300 to 2000 microns, the admixture comprising between 30 and 60% of the finished composition. Utilizing a mixture of microspheres and macrospheres produces a substantial weight savings which makes the synthetic stucco composition easier to apply, less costly to transport and less demanding on the structure of the building. In addition, the particular combination of spherical structures provides a uniform tightly knit appearance free of pinholes and craters as the smaller particles fill the void spaces between the larger ones with the spherical shape of the particles allowing them to pack in a very tight arrangement. Where it is desired to have a more textured appearance, between 1 to 25% by weight coarse silica sand may be added to the admixture, with the coarse silica sand having a particle size from 1500 to 2000 microns.
REFERENCES:
patent: 4391647 (1983-07-01), Deer et al.
patent: 4632876 (1986-12-01), Laird et al.
Guarriello John J.
Polymer Plastics Corp.
Schofer Joseph L.
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