Patent ID: 6522408
Filing Date: 2003-02-18
Classification: C08F,G01N

Abstract:
A process for the controlled production of polymeric products and/or modification of polymeric products comprisinga) determining characteristic IR absorption bands for the starting material and the desired product, b) determining the absorbance of the characteristic IR absorption bands from a), c) immersing an IR-ATR probe in an agitated reactor having contents with a maximum viscosity of 10,000 Pas and flow velocity of from 0.01 to 10 m/sec at the probe location, d) measuring absorption directly by means of the IR-ATR probe at short time intervals during the production or modification reaction, e) calculating degree of conversion and/or degree of modification of the reactor contents using one of the following equations: M&af;(t)=100-A&af;(t)A&af;(t0)&CenterDot;100&it;(%)orU&af;(t)=100-A&af;(t)A&af;(t0)&CenterDot;100&it;(%)â€ƒin which M(t)=degree of modification; U(t)=degree of conversion; A(t)=absorbance of the characteristic absorption band of the starting material at time t, and A(t0)=absorbance of the characteristic absorption band of the starting material at time t0 (i.e., start of the reaction), and f) terminating the production or modification reaction when the desired degree of reaction or modification has been reached.