NATURAL RUBBER MASTER BATCH AND METHOD FOR PRODUCING THE SAME

• Main Authors: NISHI ISAO, TAKANO TETSUO, DOBASHI MASAAKI, NOHARA DAISUKE
• Format: Patent
• Language: English
• Published: 23.04.2003
• Edition: 7
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

PROBLEM TO BE SOLVED: To provide a natural rubber master batch suppressed in gelation, retaining its viscosity for a long period, and good in workability and productivity as well. SOLUTION: This natural rubber master batch is obtained by incorporating 100 pts.wt. of a natural rubber with (A) an ester having at least one carboxy group in the molecule and made from an aliphatic polycarboxylic acid and a (poly)oxyalkylene derivative and/or (B) an ester from an aromatic polycarboxylic acid of the general formula (I) (where, m is a number >=1 indicating average polymerization degree; n and p are each an integer of >=1; q is 0 or an integer of >=1; n+p+q=6 to 8; B is an aromatic ring; R is an alkylene; R is an alkyl, alkenyl, alkylaryl or acyl; and R is H, an alkyl or alkenyl) and the (poly)oxyalkylene derivative and (C) 10-200 pts.wt. of a filler.