Modifier for vinyl polymer

TLDR: In this paper, a titled modifier which has excellent rigidity, is stable against heat and light and has good compatibility with vinyl polymers, by radical-polymerizing diisopropyl fumarate is presented.

Abstract: PURPOSE:To provide the titled modifier which has excellent rigidity, is stable against heat and light and has good compatibility with vinyl polymers, by radical-polymerizing diisopropyl fumarate. CONSTITUTION:Fumaric acid is reacted with isopropyl alcohol in the presence of an acid catalyst such as sulfuric acid or a strongly acidic ion exchange resin under heating. The resulting diisopropyl fumarate is polymerized in the presence of a radical polymn. initiator such as azobisisobutyronitrile in an inert gas atmosphere at 40-120 deg.C to obtain a modifier composed of a high-molecular compd. which does not contain nitrogen atoms and whose main chain is composed of only a carbon-to-carbon bond chain. EFFECT:This modifier can be dissolved in polar and nonpolar solvents and has desirable low flexing properties and higher glass transition temp. and softening temp. than those of conventional vinyl polymers.