Rubber compositions

Details Rubber compositions Rubber compositions

1995-12-11

1997-06-24

Lee, Helen

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

Synthetic resins

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

525177, 524513, C08F 800, C08L 6702

Patent

active

056418361

ABSTRACT:
This invention discloses a rubber composition having a high modulus and excellent processability which is comprised of a blend of (1) at least one elastomer selected from the group consisting of polybutadiene rubber, styrene-butadiene rubber, synthetic polyisoprene rubber, natural rubber, isoprene-butadiene rubber, isoprene-butadiene-styrene rubber, nitrile rubber, carboxylated nitrile rubber, and EPDM rubber, (2) at least one thermotropic liquid crystalline polymer containing an aliphatic spacer, wherein the thermotropic liquid crystalline polymer exhibits no apparent crystalline to nematic transition, wherein the thermotropic liquid crystalline polymer exhibits nematic order above its glass transition temperature, and wherein the glass transition temperature of the thermotropic liquid crystalline polymer is within the range of 20.degree. C. to 180.degree. C., and (3) carbon black.

REFERENCES:
patent: 4390681 (1983-06-01), Deex
patent: 4474938 (1984-10-01), Richardson
Stupp et al, Polym. Mater. Sci. Eng., 54, 136-9. (1986).
Stupp et al. Macromolecules, 21(5), 1228-34 (1988).
Sikkema. Integr. Fundam Polym. Sci. Technol 2, 566-70, 1987 (ed. Lemstra et a.).
Bhattacharya et al. J. Polym. Sci., Part B: Polym. Phys., 26(3), 515-26, 1988.

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