Free flowing particles of an emulsion polymer having SiO.sub.2 incorporated therein
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 24, 1992
Issued Date -
N/A
app pub date -
Nov 29, 1990
filing date -
Aug 17, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
High amounts of silicon dioxide are readily incorporated into an emulsion polymerized elastomer by mixing an aqueous dispersion of silicon dioxide with a latex of the emulsion polymer and subsequently spray drying the mixture. Free flowing, fine-size (e.g., less than 500 micrometers) particles are produced with generally complete incorporation of silicon dioxide. The presence of the silicon dioxide permits rubbers with low gel and/or low Mooney viscosity to be spray dried whereas previously this could not be accomplished. Compared to conventional means of adding a silica to a bale rubber, the above powdered masterbatch gives shorter mixing times with lower power consumption with improved physical properties, such as tensile strength.
First Claim
Other Claims data not available
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 9 Citation Count
- C08K Class
- 0 % this patent is cited more than
- 33 Age