Additive for masticating natural rubber, mastication method of n

Details Additive for masticating natural rubber, mastication method of n Additive for masticating natural rubber, mastication method of n

1998-03-24

1999-12-28

Cain, Edward J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

524287, 524288, 524289, 524290, 524291, 524292, 524293, 524294, 524295, 524296, 524297, 524298, 524299, 524300, C08K 508

Patent

active

060083042

ABSTRACT:
An additive for masticating natural rubber comprising at least one compound selected from the group consisting of benzoic acids, naphthoic acids, dicarboxylic acids and compounds represented by Formula (IV): ##STR1## wherein m and n each represent an integer of 1 to 3; p represents an integer of 1 to 4; m+n+p=6; X is O, NR.sup.8 or (R.sup.9 O).sub.q ; R.sup.6 is a C.sub.1 .about.C.sub.24 alkyl, a C.sub.2 .about.C.sub.24 alkenyl, or a C.sub.6 .about.C.sub.24 aryl group; and R.sup.7 is H, OH, an alkyl, alkenyl or aryl group; R.sup.8 is H or a C.sub.1 .about.C.sub.24 alkyl group; R.sup.9 is a C.sub.1 .about.C.sub.4 alkyl group; q is an integer of 1 to 5, a mastication method and a natural rubber composition each of which uses the additive, and a pneumatic tire using the natural rubber composition.

REFERENCES:
patent: 2570632 (1951-10-01), Barton
patent: 3297607 (1967-01-01), Behrens
patent: 3915943 (1975-10-01), Wright
patent: 4075159 (1978-02-01), Koyama et al.
patent: 4191671 (1980-03-01), Katoaka et al.
patent: 4410656 (1983-10-01), Coran et al.
"Chemical Dictionary", Grant and Hackhs (1987).

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