In-line ultrasonic check for detecting the partial vulcanization of a rubber mixture in the in situ silanization of bright fillers
申请人:LANXESS Deutschland Gmbh
公开号:US20220186001A1
公开(公告)日:2022-06-16
The invention relates to a method for checking the silanization of pale-colored fillers, where a mixture comprising at least one silanized pale-colored filler, preferably silanized silica, and comprising at least one rubber is irradiated with ultrasound waves in a frequency range of 4 to 10 MHz, preferably of 5 to 7 MHz, and the signal strength of the ultrasound waves is determined after transmission through the rubber mixture, where the relative attenuation coefficient α
rel
of the rubber mixture in the frequency range of the ultrasound waves is determined, the standard deviation σ of the relative attenuation coefficient α
rel
is determined, and α
rel
and σ are used for detection of incipient crosslinking of the rubber mixture.