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Acid Black, Cationic Polymerizable Monomer Stabilization with Amine

IP.com Disclosure Number: IPCOM000049918D
Original Publication Date: 1982-Aug-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Beach, BL: AUTHOR [+2]

Abstract

A mixture intended to be polymerized by electron beam initiation can employ acid black and a cationic monomer. Such a system is stabilized against premature polymerization by the addition of small amounts of a soluble amine.

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Acid Black, Cationic Polymerizable Monomer Stabilization with Amine

A mixture intended to be polymerized by electron beam initiation can employ acid black and a cationic monomer. Such a system is stabilized against premature polymerization by the addition of small amounts of a soluble amine.

Acid carbon blacks are desirable to use because they are more easily dispersed than neutral carbon blacks. In a system which is intended to be polymerized by radiation, it is desired to have a stable pot to eliminate viscosity changes due to premature polymerization. If monomers are used which have an electron donating group attached to the reactive site, then a premature polymerization can take place initiated by the acid carbon black. By adding 1% phenylenediamine this cationically initiated reaction is completely eliminated, and since the radiation induced polymerization proceeds by a free radical mechanism, no effect is seen on this desired polymerization route. An example of the stabilizing effect involves a formulation having 12% RAVEN* 1255 carbon black which has a pH of 3 and 25% n-vinyl pyrrolidone. The following table lists the analytical data: Initial Pyrrolidone Pyrrolidone Level

Sample Monomer Level after 5 days Unstabilized 25 percent 6.5 percent Stabilized 25 percent 25.0 percent w/1 pct. Phenylenediamine (*) Trademark of Cities Service Company, Columbian Division.

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