Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1997-12-24
1999-08-17
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...
524 83, 524 87, 524 94, 524 95, 524137, 524146, 524204, 524210, 5253327, 525349, 525341, C08C 1900
Patent
active
059394935
ABSTRACT:
A rubber composition comprising 100 parts by weight of a rubber component which comprises at least one type of rubber selected from the group consisting of natural rubber and diene synthetic rubbers, 0.1 to 10 parts by weight of at least one type of metal dithiophosphate represented by the following general formula, optionally 15 to 85 parts by weight of a reinforcing inorganic filler, and optionally a specific tertiary amine compound in an amount of 0.5 to 15% by weight of the amount of the reinforcing inorganic filler is provided.
General formula ##STR1## wherein R.sup.1 and R.sup.3 each independently represents an alkyl group or a cycloalkyl group, M represents an antimony atom, a zinc atom, a copper atom, or an iron atom, and n represents a valency of M.
The rubber composition of the present invention exhibits excellent resistance to heat or resistance to heat aging (particularly excellent resistance to hardening and excellent fracture properties).
REFERENCES:
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Verbesserung der Reversionsbestandigkeit durch nachvernetzende Beschleunigungssysteme, Kautschuk Und Gummi, vol. 38, No. 8, 1985 pp. 710-720.
Chemical Abstracts, vol. 100, No. 4, Jan. 23, 1984, abstract No. 23413j.
"Flexometer Predicts Heat Generation" by Hiroshi Mouri, Bridgestone Corp. pp. 24-28.
"Antioxidants-Preventive Mechanisms" by S. Almalaika, pp. 194-223.
Studied on Cure Synergism-Part I: Effect of Bis (Diisopropyl) Thiophosphoryl Disulfide and Thiazole-Based Accelerators in the Vulcanization of NR* Swapan Kumar Mandal, Rabindra Nath Datta and Dipak Kumar Basu, Polymer Science Unit, Indian Association for the Cultivation of Science, Jadavpur, Calcutta-700 032, India.
"The Relationship Between Heat Buildup and the Chemistry of Crosslinking Systems"* Theo Kempermann, Bayer AG, Leverkusen, West Germany, pp. 390-407.
Thiophosphates--helpful int e design of nitrosamine-free accerlerator systems. by H.-J. Graf and A.H. Johansson, Rhein Chemie, pp. 30-37, 80 & 81.
Bridgestone Corporation
Cain Edward J.
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