Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1996-09-10
1999-04-27
Zitomer, Fred
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
526 59, 526 60, 526250, 526343, 526344, 5263442, C08L 2706, C08L 2708, C08L 2714, C08L 2716
Patent
active
058980563
ABSTRACT:
Process for monitoring the quality of latices of halogen-containing vinyl polymers during polymerization in aqueous emulsion, in which a luminous radiation is emitted directly into the aqueous emulsion, the scattered light reflected by the polymer particles of the latex in the spectrum band situated between 1100 and 2500 nm is captured and transmitted to a near-infrared spectrophotometer and is measured at specific wavelengths related by correlation equations to specific properties of the latex which is monitored.
Device for monitoring the quality of latices in a reactor during polymerization, including essentially a measuring probe placed in the reactor, an optical coupling of the said probe with a near-infrared spectrophotometer provided with means for emitting light and for capturing the scattered light which is reflected and a computer which has the correlation equations in its memory.
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S.Y. Chang et al.: "Monitoring Polymerization Reactions by Near-IR Spectroscopy". In: ACS Symposium Series: Multidimensional Spectroscopy of Polymers, vol. 598, 1995, pp. 147-165.
P. D. Gossen et al.: "Composition and Particle Diameter for Styrene/Methyl Methacrylate Copolymer Latex Using UV and NIR Spectroscopy". In: Applied Spectroscopy, vol. 47 No. 11, 1993, pp. 1852-1870.
P.K. Aldridge et al.: "Noninvasive Monitoring of Bulk Polymerization Using Short-Wavelength Near-Infrared Spectroscopy". In.: Analytical Chemistry, vol. 47, No. 11 Dec. 1993, pp. 3581-3585.
Odian, "Principles of Polymerization" (1991) 335, Wiley (New York).
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Breyer Pol
Josephy Claude
Schneller John W.
Solvay ( Societe Anonyme)
Spencer George H.
Zitomer Fred
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