Method for improved production of graft polymers

• Main Author: EICHENAUER HERBERT DR,HOBEIKA SVEN DR,WENZ ECKARD DR,BORN RALF-JUERGEN DR,BUCHHOLZ VERA DR,LANGE CHRISTIAN DR
• Format: Patent
• Language: Chinese; English
• Published: 25.08.2004
• Edition: 7
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MEASURING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PHYSICS; TESTING; THEIR PREPARATION OR CHEMICAL WORKING-UP

公开了一种通过乳液方法制备ABS型接枝聚合物的方法。在该方法中：在C)95-5重量％的玻璃态转化温度＜10℃的一种或多种接枝基质存在下，将含A)50-99重量份的至少一种乙烯基芳族化合物和B)1-50重量份的至少一种共聚物的5-95重量％的单体混合物进行聚合。该方法的改进之处包括在反应期间，连续监测反应混合物的拉曼光谱，测定与指定理想反应过程的偏差并进行相应的调整。 A method for the production of ABS-type graft copolymers by emulsion polymerisation, in which the course of the reaction is constantly monitored by Raman spectrometry and corrective measures are taken when the concentration of a monomer deviates from the required value. A method for the production of ABS-type graft copolymers (I) by emulsion polymerisation of 5-95 wt% of a mixture of (A) 50-99 parts by weight (pts. wt.) vinylaromatic(s) and (B) 1-50 pts. wt. comonomer(s) in presence of (C) 95-5 wt% grafting base(s) with a glass transition point (Tg) below 10[deg]C, in which the reaction is constantly monitored by Raman spectrometry and corrective measures are taken when the concentration of a monomer deviates from the required value.