Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Process of treating scrap or waste product containing solid...
Patent
1996-08-06
1998-03-24
Jagannathan, Vasu
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Process of treating scrap or waste product containing solid...
521 405, 521 42, 521 425, 521 45, 521 455, 521502, 525232, 525240, 528931, C08J 1100, C08L 1700
Patent
active
057313580
ABSTRACT:
A process for the manufacture of devulcanized rubbers from a base material composed of scrap rubber products is provided which produces high grade, low viscosity rubber products. The process is carried out in at least two stages, the first stage comprising mixing a polymeric additive to the base material at elevated temperatures and the second stage comprising mixing unvulcanized virgin rubber with the mixture of base material and polymeric additive at elevated temperatures. The process also may comprise a preliminary stage in which a chemically modified epoxidized natural rubber is mixed with the base material at ambient temperature prior to the first stage.
REFERENCES:
patent: 4341667 (1982-07-01), Lal et al.
patent: 4386182 (1983-05-01), Zijp
patent: 5157082 (1992-10-01), Johnson
Article "Expoxidized Natural Rubber" I.R. Gelling, pp. 184-188, Exhibit 1.
Article "Epoxidized Rubber (ENR)", Dr. C. Mitherell, p. 1, Exhibit 2.
Article "Methods of Devulcanization", Walter C. Warner, pp. 559-566, Exhibit 3.
Article "Scrap Tire and Rubber Recycling Terminology", pp. 3, 6, 7, 10, 11, 18-21, 24-25, Exh. 4.
Article "Reclaimed Rubber", Fernley G. Smith, pp. 318-335, Exhibit 5.
Article "Thermoplastic Elastomers-Three Decades of Progress", N. R. Legg Exhibit 6.
Article "Vulcanization: Conventional and Dynamic", Hubert Y. Coran. Exh. 7.
Article "Charles Goodyear Medalist--1995", Biography, R. Warren Wise Exh. 8.
Article "Thermoplastic Copolyesters" R.P. Kane Exh. 9.
Article "Thermoplastic Elastomers" B..0. Simpson. Exh. 10.
Asinovsky Olga
Borsari Peter A.
Jagannathan Vasu
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