Solution polymerization of acrylic acid derived monomers using t

Details Solution polymerization of acrylic acid derived monomers using t Solution polymerization of acrylic acid derived monomers using t

1986-12-12

1988-10-11

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 78, 526 79, 526208, 526209, 526210, 526212, 526213, 526227, 526228, 526230, 5262305, 526231, 526232, 5262323, 5262325, 52631842, 526320, C08F 206, C08F 434, C08F 2028

Patent

active

047772301

ABSTRACT:
A process is provided for the free radical polymerization of monomers derived from substituted or unsubstituted acrylic acid/methacrylic acid and esters thereof for the production of a polymer having a narrow molecular weight distribution and an average molecular weight of less than 4000. These polymers are produced by the solution polymerizing of said monomers wherein 20-40% by weight of the monomer composition is hydroxyalkyl acrylate or methacrylate in the presence of a solvent system suitable for high solids coating applications and in the presence of an initiating amount of a tertiary alkyl hydroperoxide and/or its derivatives having at least 5 carbons wherein the initiator and monomers, alone or in combination, are added continuously at a programmed rate wherein the rate of addition corresponds approximately to the rate of decomposition of said monomer and initiator. These polymers are used for high solids coating applications.

REFERENCES:
patent: 2403758 (1946-07-01), Rust et al.
patent: 3326859 (1967-06-01), Seiner
patent: 4075242 (1978-02-01), Rhum et al.
R. J. Kirchgessner et al., "New Family of Organic Peroxide Initiators" Modern Plastics 11/'84, pp. 66-68.
O'Driscoll et al., Kinetic Anal. of Starved Feed Polymerization Reactor, presented at Second Berlin Int. Workshop on Polym. Reaction Eng'ing, Oct., 1986.

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