Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1997-06-09
1999-07-27
Zitomer, Fred
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526161, 5261691, 526172, 526179, 526281, 526282, 526279, 526348, C08F23208, C08F21002, C08F 480
Patent
active
059291818
ABSTRACT:
A method of preparing amorphous copolymers of ethylene and at least one norbornene (NB)-type comonomer is disclosed. These polymers may be random or alternating depending on the choice of catalyst and/or the relative ratio of the monomers used. This method comprises polymerizing said monomers in a diluent or in bulk in the presence of a neutral nickel catalyst which may be represented by the formula ##STR1## wherein Y may be a saturated or unsaturated hydrocarbyl chain, X may be oxygen or sulfur, E may be phosphorus, arsenic, antimony, oxygen or nitrogen, R and R' independently each is hydrogen or a hydrocarbyl group, L is a ligand containing a heteroatom P, N or O or L and R together with L may form part of a chelating structure in which case L is an ethylenic double bond.
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Bagdasaryan Andrey Khristoforovich
Bykov Viktor Ivanovich
Finkelshtein Eugeny Shmerovich
Goodall Brian Leslie
Makovetsky Kiryll Lvovich
A.V. Topchiev Institute of Petrochemical Synthesis
Shust Nestor W.
The B.F.Goodrich Co.
Zitomer Fred
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