Uniform molecular weight polymers

Details Uniform molecular weight polymers Uniform molecular weight polymers

1992-04-01

1992-12-08

Smith, Edward J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526145, 526146, 526147, 526193, 526208, 526209, 526217, 526222, 526237, 5263487, 585520, 585525, 585526, 585527, 585530, 585 9, 585 10, C08F 414, C08F 416, C08F 1010

Patent

active

051699141

ABSTRACT:
A method for producing polymers with narrow molecular weight distribution which involves combining (1) an initiator component of the formula ##STR1## in which R.sub.1, R.sub.2, and R.sub.3 are alkyl, aryl, or aralkyl groups, and can be the same or different, and X is an acetate, etherate, a hydroxyl group, or a halogen, and i is a positive whole number, (2) a Lewis acid of the formula MX.sub.n in which M is titanium, aluminum, boron, or tin, X is a halogen, and n is a positive whole number, (3) an electron donor component having an electron donor number of from at least about 25 to no more than about 50, (4) a solvent for the preceding and (5) a hydrocarbon monomer component.

REFERENCES:
patent: 4568732 (1986-02-01), Kennedy et al.
patent: 4611037 (1986-09-01), Musch et al.
patent: 4663406 (1987-05-01), Bronstert et al.
patent: 4814405 (1989-03-01), Kennedy
patent: 4929683 (1990-05-01), Kennedy et al.
Y. Marcus, Journal of Solution Chemistry, vol. 13, No. 9, 1984, 599-625.

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