Abstract 1. A PROCESS FOR THE PREPARATION OF A SUBSTANTIALLY ODOURLESS AND TASTE FREE COPOLYMER OF ACRYLONITRILE AND AROMATIC OLEFIN SELECTED FROM THE GROUP CONSISTING OF STYRENE AND A-METHYL STRYENE CONTAINING 50 TO 95% MOLAR OF UNITS OF ACRYLONITRILE AND 5 TO 50% MOLAR OF UNITS OF AT LEAST ONE AROMATIC OLEFIN RANDOMLY DISTRIBUTED IN SAID COPOLYMER, SAID PROCESS COMPRISING POLYMERISING AN INITIAL CHARGE CONTAINING ACRYLONITRILE, SAID AROMATIC OLEFIN, A FREE RADICAL POLYMERISATION CATALYST AND AT LEAST ONE ALKANETHIOL, AND ADDING TO SAID INITIAL CHARGE A MONOMER FEED CONTAINING SAID AROMATIC OLEFIN AND AT LEAST ONE TERPENE CONSISTING OF TWO ISOPRENE UNITS AND HAVING AT LEAST ONE ETHYLENIC BOND, SAID MONOMER FEED BEING AT A RATE CORRESPONDING PRO RATA TO THE RATE OF PRODUCTION OF HEAT IN THE COPOLYMER FORMATION, AND THE AMOUNT OF THE ALKANETHIOL IN THE INITIAL MONOMER CHARGE BEING SELECTED TO PROVIDE COPOLYMER HAVING A REDUCED VISCOSITY (MEASURED ON A 0.5% W./V. SOLUTION IN DIMETHYL FORMAMIDE AT 25* C.) BETWEEN 0.5 AND 1.8, AND THE AMOUNT OF SAID TERPENE ADDED WITH THE MONOMER FEED CONTAINING AROMATIC OLEFIN BEING SELECTED TO MAINTAIN SUBSEQUENT POLYMER FORMED WITHIN THE RANGE OF 0.5 AND 1.8.
A PROCESS FOR THE PREPARATION OF A SUBSTANTIALLY ODOURLESS AND TASTE FREE COPOLYMER OF ACRYLONITRILE AND AROMATIC OLEFIN SELECTED FROM THE GROUP CONSISTING OF STYRENE AND A-METHYL STRYENE CONTAINING 50 TO 95% MOLAR OF UNITS OF ACRYLONITRILE AND 5 TO 50% MOLAR OF UNITS OF AT LEAST ONE AROMATIC OLEFIN RANDOMLY DISTRIBUTED IN SAID COPOLYMER, SAID PROCESS COMPRISING POLYMERISING AN INITIAL CHARGE CONTAINING ACRYLONITRILE, SAID AROMATIC OLEFIN, A FREE RADICAL POLYMERISATION CATALYST AND AT LEAST ONE ALKANETHIOL, AND ADDING TO SAID INITIAL CHARGE A MONOMER FEED CONTAINING SAID AROMATIC OLEFIN AND AT LEAST ONE TERPENE CONSISTING OF TWO ISOPRENE UNITS AND HAVING AT LEAST ONE ETHYLENIC BOND, SAID MONOMER FEED BEING AT A RATE CORRESPONDING PRO RATA TO THE RATE OF PRODUCTION OF HEAT IN THE COPOLYMER FORMATION, AND THE AMOUNT OF THE ALKANETHIOL IN THE INITIAL MONOMER CHARGE BEING SELECTED TO PROVIDE COPOLYMER HAVING A REDUCED VISCOSITY (MEASURED ON A 0.5% W./V. SOLUTION IN DIMETHYL FORMAMIDE AT 25* C.) BETWEEN 0.5 AND 1.8, AND THE AMOUNT OF SAID TERPENE ADDED WITH THE MONOMER FEED CONTAINING AROMATIC OLEFIN BEING SELECTED TO MAINTAIN SUBSEQUENT POLYMER FORMED WITHIN THE RANGE OF 0.5 AND 1.8.
Claim 2
Dependent Claim
192 words
A PROCESS FOR THE PREPARATION OF A SUBSTANTIALLY ODOURLESS AND TASTE FREE COPOLYMER OF ACRYLONITRILE AND AROMATIC OLEFIN SELECTED FROM THE GROUP CONSISTING OF STYRENE AND A-METHYL STRYENE CONTAINING 50 TO 95% MOLAR OF UNITS OF ACRYLONITRILE AND 5 TO 50% MOLAR OF UNITS OF AT LEAST ONE AROMATIC OLEFIN RANDOMLY DISTRIBUTED IN SAID COPOLYMER, SAID PROCESS COMPRISING POLYMERISING AN INITIAL CHARGE CONTAINING ACRYLONITRILE, SAID AROMATIC OLEFIN, A FREE RADICAL POLYMERISATION CATALYST AND AT LEAST ONE ALKANETHIOL, AND ADDING TO SAID INITIAL CHARGE A MONOMER FEED CONTAINING SAID AROMATIC OLEFIN AND AT LEAST ONE TERPENE CONSISTING OF TWO ISOPRENE UNITS AND HAVING AT LEAST ONE ETHYLENIC BOND, SAID MONOMER FEED BEING AT A RATE CORRESPONDING PRO RATA TO THE RATE OF PRODUCTION OF HEAT IN THE COPOLYMER FORMATION, AND THE AMOUNT OF THE ALKANETHIOL IN THE INITIAL MONOMER CHARGE BEING SELECTED TO PROVIDE COPOLYMER HAVING A REDUCED VISCOSITY (MEASURED ON A 0.5% W./V. SOLUTION IN DIMETHYL FORMAMIDE AT 25* C.) BETWEEN 0.5 AND 1.8, AND THE AMOUNT OF SAID TERPENE ADDED WITH THE MONOMER FEED CONTAINING AROMATIC OLEFIN BEING SELECTED TO MAINTAIN SUBSEQUENT POLYMER FORMED WITHIN THE RANGE OF 0.5 AND 1.8.