Role of three different carboxylic monomers in acrylate emulsion copolymerization in the presence of reactive emulsifier

Abstract

In this article, a series of carboxylated acrylate copolymer latices were prepared based on the semicontinuous emulsion polymerization via the pure monomer dropwise manner with three different kinds of carboxylic monomers in presence of reactive emulsifier. The effects of the carboxylic monomers [acrylic acid, methacrylic acid, and monobutyl itaconate (MBI)] on the conversion and the properties of acrylate latices and films have been investigated. The carboxylic groups (ACOOH) distribution of these three kinds of latices were investigated as well. The results show that the concentration of surface ACOOH (C S ) and embedded ACOOH (C b ) both increase with the increase of the amount of carboxylic monomers. It shows that MBI, the most hydrophobic of the three carboxylic monomers used, tends to be concentrated inside the particle core, and the latex particles have a narrow size distribution. The results of common stability test have demonstrated that the stability of the latex is satisfactory. Moreover, the water absorption and the acid and alkaline resistance of the latex depend on the kind of carboxylic monomer.

In situsynthesis and properties of hydrogenated rosin/polyacrylate composite miniemulsions-based pressure sensitive adhesives

“…In recent years, the development of soap-free emulsion polymerization [8,9] and reactive surfactants [10][11][12] has promoted the substantial improvement of the resistance to water of the polyacrylate latex films. In order to improve the adhesion properties of polyacrylate emulsions, the tackifying resins especially rosin resin and its derivatives have attracted more and more attentions.…”

Partitioning of monobutyl itaconate and β‐carboxyethyl acrylate between organic and water phases

“…Significant results obtained by copolymerizing monoitaconates are a possibility of balancing hydrophilic/hydrophobic properties at different pH levels . Lu et al discussed the function of three different carboxylic monomers in acrylate emulsion copolymerization, and found that the latex prepared with MBI has better water resistance than latex with AA. Hence, monoitaconate esters, especially MBI which contains both ester and carboxylic groups, are in high market demand.…”

“…Although a few fundamental studies have been carried out concerning the behavior of MBI and β‐CEA in emulsion polymerizations, the distribution of these two new functional monomers between the organic and aqueous phases has not been investigated until now. The partitioning behavior of the carboxylic acids between the organic and aqueous phases depends on many factors such as temperature, pH, composition, type, and concentration of surfactant, etc .…”

Modification research on the peel strength of the acrylate emulsion pressure‐sensitive adhesives

“…Qu et al 10 reported the synthesis of a series of poly[(n-butyl acrylate)-co-(acrylic acid)] latexes with different particle sizes with changing levels of surfactant at the seed stage. 13,14 They can generally be divided into several categories: unseeded semibatch, 15 monomer-seeded semibatch, 12 and pre-emulsion-seeded semibatch 16 polymerizations. Xu et al 11 discussed the effect of the hard monomer (MMA) content on the adhesive properties of poly(butyl acrylate-co-methyl methacrylate-co-acrylic acid) latexes.…”

“…Semibatch polymerizations have always been used in these syntheses of acrylate emulsions. 13,14 They can generally be divided into several categories: unseeded semibatch, 15 monomer-seeded semibatch, 12 and pre-emulsion-seeded semibatch 16 polymerizations. However, no study to date has examined the effect of different semibatch processes on the peel strength of PSAs.…”