Vulcanization of Saturated Acrylic Resins

Abstract

Rubberlike materials, designated as Lactoprene, were prepared In earlier investigations by copolymerizing ethyl acrylate with small proportions of butadiene, Isoprene, or allyl maleate, compounding the resulting copolymers (assumed to have olefinic unsaturation) with sulfur and accelerators, and then curing the compounded products.

Acetylation of Alkyl Lactates and Similar Hydroxy Esters with Acetic Acid

“…Pale crepe, rvhich is considered to have nearly 100% internal double bonds, appears to contain 10-15% vinyl double bonds following oxidative break-down (17). However, successful ozonolysis studies have been reported for 50-50 butadiene-styrene copolymers (1), alkali metal catalyzed polybutadiene (22), and GR-S (17).…”

“…(16) Meyer, Hans, "Nachwels und Bestimmung Organischer Verbindungen," p. 127, Berlin, J. Springer, 1933. (17) Mikusch, J. D. xron, J. Am.…”

“…Most attention was directed to the interaction of methyl lactate, now commercially available, and acetic acid primarily because pyrolysis of the acetyl derivative of methyl lactate gives methyl acrylate, a resin and elastomer intermediate (17,18), in high yield.…”

Polyacrylic Ether-Ester Elastomers

“…Many curative systems for saturated polyacrylic elastomers are reported in the literature. Some of these are metallic oxides (6), polyamines (7), dioximes(8), peroxides (8), and sodium metasilicate (5,9). Table II summarizes the data obtained in studies to adapt these systems to Vyram polyacrylic elastomer.…”

Vulcanization of Chlorine-Containing Acrylic Elastomers

“…of acrylic esters and dienes such as butadiene have been found (8,8) capable of undergoing vulcanization with sulfur and certain accelerators. It was observed subsequently (6,8) that halogen-containing acrylic resins, prepared conveniently (9) by copolymerizing 95 parts of ethyl acrylate with approximately 5 parts of either 3-chloropropyl acrylate or 2-chloroethyl acrylate, also can be vulcanized with sulfur and with certain other agents.…”