Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1979-06-06
1981-09-29
Wong, Jr., Harry
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526234, 526236, 5263292, 5263297, 526335, 526341, 526346, 5263471, C08F 408, C08F11208, C08F11234, C08F12014
Patent
active
042924219
ABSTRACT:
The invention relates to an anionic polymerization process using an initiator based on an alkali metal amide in combination with an alkali metal salt, as well as to the polymers obtained by this process.
The polymerization process according to the invention is characterized in that an initiator is used which results from the combination of an alkali metal amide selected from the group comprising sodium amide, potassium amide or lithium amide and an alkali metal salt of which the cation is selected from the group comprising potassium, lithium or sodium, the anion being selected from the group comprising the thiocyanate, nitrite, cyanide and cyanate anions.
These initiators make it possible to carry out the anionic polymerization or vinyl, heterocyclic and diene monomers in order to obtain special polymers or widely used polymers, with great adaptability and under advantageous economic conditions.
REFERENCES:
patent: 3006894 (1961-10-01), Evans et al.
patent: 3642734 (1972-02-01), Cheng et al.
Boileau Sylvie L.
Caubere Paul J.
Lecolier Serge L.
N'Debeka Gilberte N.
Raynal Serge F.
Societe Nationale des Poudres et Explosifs
Wong, Jr. Harry
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