Process for producing improved silica-reinforced masterbatch of polymers prepared in latex form
AssigneeDSM Copolymer, Inc.
InventorsJohn W. Lightsey, David J. Kneiling, John M. Long
Life of this patent
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Abstract
A process for the incorporation of silica into a polymer in latex in which a silica is treated with an organo silicon compound coupling agent in aqueous suspension to form a compatibilized silica and then contacting a polymer latex with the compatibilized silica whereby the silica becomes substantially uniformly distributed throughout the latex and can be recovered when the latex is coagulated to yield little residual silica in the liquid residue from the latex. Also described is a process for preparing the compatibilized silica.
Claims37
A process for the incorporation of silica into a polymer in latex form comprising the steps of:
- (a) treating a silica with a coupling agent in aqueous suspension to form a compatibilized silica slurry, said coupling agent being an organo silicon compound having the capability of chemically reacting with the surface of the silica to bond the coupling agent thereto;
- and
- (b) contacting the polymer latex with the compatibilized silica slurry whereby the silica is substantially uniformly distributed throughout the latex.
A process for the incorporation of silica into a polymer in latex form comprising the steps of:
- (a) treating a silica with a coupling agent in aqueous suspension to form a compatibilized silica slurry, said coupling agent being an organo silicon compound having the capability of chemically reacting with the surface of the silica to bond the coupling agent thereto;
- (b) contacting the polymer latex with the compatibilized silica slurry whereby the silica is substantially uniformly distributed throughout the latex;
- and
- (c) coagulating the latex to recover the polymer masterbatch therefrom.
A process for the incorporation of silica into a polymer in latex form comprising the step of contacting the polymer latex with a compatibilized silica slurry whereby the silica is substantially uniformly distributed throughout the latex, the compatibilized silica slurry having been formed by treating the silica with a coupling agent in aqueous suspension.
A process for the incorporation of silica into a polymer in latex form comprising the steps of contacting the polymer latex with a compatibilized silica slurry whereby the silica is substantially uniformly distributed throughout the latex, the compatibilized silica slurry having been formed by treating the silica with a coupling agent in aqueous suspension, and coagulating the latex to recover the polymer containing the compatibilized silica substantially uniformly distributed therein.
A process for the incorporation of silica into polymer in latex form comprising the step of contacting a polymer latex with a compatibilized silica, wherein the compatibilized silica has been prepared by treating a silica with a coupling agent in aqueous suspension, the coupling agent being an organosilicon compound having the capability of chemically reacting with the surface of the silica to bond the coupling agent thereto, whereby the compatibilized silica is substantially distributed, both uniformly and quantitatively, throughout the latex.
Dependencies are inferred from the claim text.