Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1993-06-03
1994-11-29
Nutter, Nathan M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
5253329, 5253331, 5253332, 525381, 525383, 528392, C08F 800, C08G 6702
Patent
active
053691873
ABSTRACT:
Polymers having a very good combination of chemical, mechanical and process properties, and particularly useable either alone or as mixtures, as high-tenacity thermoplastic polymer and as elastomers or elastomeric modifiers, contain, randomly distributed along their chain, repeating cycloketonic structural units having the following general formula (I): ##STR1## wherein: A represents a tetravalent aliphatic or cycloaliphatic, substituted or non-substituted moiety containing a total number of from 4 to 50, preferably from 4 to 20, carbon atoms.
Such polymers can be prepared by means of a process which comprises reacting, in a liquid media, a polydiene containing adjacent structural units derived from the 1,4-cis polymerization of conjugated dienes, with carbon monoxide, in the presence of free radical generating compounds and, optionally, a compound capable of acting as a hydrogen donor.
REFERENCES:
patent: 4284821 (1981-08-01), Martin et al.
patent: 4981916 (1991-01-01), Willis
Cardi Nicoletta
Chatgilialoglu Chrissostomos
Garbassi Fabio
Sommazzi Anna
Consiglio Nazionale Delle Ricerche
Dodson Shelley A.
Enichem S.p.A.
Hoare, Jr. George P.
Nutter Nathan M.
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