Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1979-06-25
1981-01-13
Jacobs, Lewis T.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 4249, C08K 906
Patent
active
042448603
ABSTRACT:
A process for preventing separation of fillers and other dispersed additives from thermoplastic molding compositions during extrusion, calendering or like processing, along metallic contact surfaces of a processing unit, involves admixing a silane additive to a portion of a thermoplastic molding composition containing a thermoplastic molding resin and at least one filler or other dispersed additive that tends to separate out from the molding composition during the processing, processing the portion of thermoplastic molding composition in a processing unit, measuring the electrical energy applied to the processing unit during processing per kilogram of molding composition per unit time, determining if the electrical energy applied has been increased by the addition of the silane additive as compared to the electrical energy required per kilogram of molding composition per unit time for processing another portion of the thermoplastic molding composition free of the silane additive and thereafter adding an effective amount of the silane additive determined to be capable of increasing the applied electrical energy required to process the molding composition by at least 20% with the thermoplastic molding composition and processing the resulting thermoplastic molding composition in the processing unit. Among the silane additives disclosed as being suitable for this process are .beta.-chloroethyl triethoxysilane and vinyl trialkoxysilanes containing alkoxy groups having from 1 to 6 carbon atoms.
REFERENCES:
patent: 3915922 (1975-10-01), Suzuki et al.
Sterman et al., The Effect of Silane Coupling Agents in Improving the Properties of Filled or Reinforced Thermoplastics, Society of Plastics Engineers, Inc., Mar. 1965, 21st Annual Tech. Conf.
Kuhnel Werner
Scharf Karl-Gunter
Spielau Paul
Weiss Richard
Dynamit Nobel Aktiengesellschaft
Jacobs Lewis T.
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