Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1989-12-14
1991-03-12
Lipman, Bernard
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
5253271, 525339, C08F 804
Patent
active
049994050
ABSTRACT:
A random copolymer is formed by emulsion polymerization from two monomeric classes. The first monomeric class is a conjugated diene or substituted conjugated diene containing from four to about eight carbon atoms. The second monomeric class is of the general formula ##STR1## wherein R.sub.1 is an alkenyl group containing from about two to about eight carbon atoms, and R.sub.2 is hydrogen or an alkyl group containing from one to about eight carbon atoms.
The second monomeric class can be replaced with up to about 20 percent by weight of the general formula CH.sub.2 .dbd.CR.sub.3 C wherein R.sub.3 is hydrogen or --CH.sub.3 l and X is --OOR.sub.4, --ONR.sub.5 R.sub.6 or --OOR.sub.7 OR.sub.4 wherein R.sub.4 is an alkyl group containing from one to about four carbon atoms, --CH.sub.2 CF.sub.3 or --CH.sub.2 CF.sub.2 CF.sub.2 H, R.sub.5 and R.sub.6 are alkyl groups independently containing from one to about four carbon atoms and R.sub.7 is an alkylene group containing from 1 to about 4 carbon atoms. The random copolymer thus obtained is hydrogenated in the presence of a transition metal catalyst and a trialkyl aluminum and further in the absence of Lewis acids such as boron trifluoride or boron trifluoride etherate. Additionally, at least one complexing agent is employed for the transition metal catalyst.
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Chemical Abstracts vol. 68, 1968, pp. 7696, 79692n.
A paper entitled "Oil-Resistant Rubbers from 2-Methyl Vinyl Pyridine," J. E. Pritchard & M. H. Opheim, Industrial & Engineering Chem., 1954, vol. 46, pp. 2242-2245.
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A paper entitled "Pyridinium High Polymers--A New Class of Oil-Resistant Synthetic Rubbers," W. B. Reynold, J. E. Pritchard, M. H. Opheim, & G, Kruas, Proceedings of the Third Tech. Conf., 1956, pp. 226-240.
Dureska David P.
Hudak Daniel J.
Lipman Bernard
Skinner William A.
The B. F. Goodrich Company
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