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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Influence of the hydroxypropyl acrylate and hydroxypropyl methacrylate monomer concentration on the emulsion copolymerization of styrene with n-butyl acrylate and acrylonitrile to produce adhesives

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Author(s):
Laura Alves Campos [1] ; Samuel A. Santos [2] ; Fábio Henrique Franco [3] ; Marlon Sandro dos Santos [4] ; Lília Müller Guerrini [5] ; Maurício Pinheiro de Oliveira [6]
Total Authors: 6
Affiliation:
[1] Universidade Federal de São Paulo-UNIFESP. Instituto de Ciência e Tecnologia - Brasil
[2] Universidade Federal de São Paulo-UNIFESP. Instituto de Ciência e Tecnologia - Brasil
[3] BASF S.A.. Laboratório de Pesquisa e Desenvolvimento de Polímeros - Brasil
[4] BASF S.A.. Laboratório de Pesquisa e Desenvolvimento de Polímeros - Brasil
[5] Universidade Federal de São Paulo-UNIFESP. Instituto de Ciência e Tecnologia - Brasil
[6] Universidade Federal de São Paulo-UNIFESP. Instituto de Ciência e Tecnologia - Brasil
Total Affiliations: 6
Document type: Journal article
Source: MATERIA-RIO DE JANEIRO; v. 24, n. 3 2019-09-16.
Abstract

ABSTRACT Hydroxyl acrylic monomers are important because the hydroxyl group present in the molecule can react with isocyanate groups, conferring better mechanical properties to the final polymer when applied onto some substrates. The aim of this work was to study the effects of the hydroxypropyl acrylate (HPA) and hydroxypropyl methacrylate (HPMA) monomer concentration on the emulsion polymerization of styrene (St) with n-butyl acrylate (ABu) and acrylonitrile (ACN). The goal of this work was to obtain latexes with higher concentrations of hydroxyl groups, ideal for reacting with isocyanate, without generating residues or coagulum. Latexes with different amounts of HPA and HPMA (0,3,5,7 e 10 wt%) were obtained and characterized with respect to solids content, viscosity, particle diameter, particle size distribution, freeze-thaw stability, minimum film forming temperature, coagulum formation, hardness and colloidal stability. The results show that the increased HPMA concentration affected the colloidal properties of the latexes. Among the concentrations of HPMA studied, it was possible to obtain latex with a maximum concentration of 5% HPA and 7% HPMA, whereas latex produced with 10% HPA and HPMA had low colloidal stability. Adhesives was obtained by mixing styrene-acrylic hydroxylated latex with a blocked poly(isocyanate) dispersion and characterized. (AU)

FAPESP's process: 13/25619-3 - Synthesis of stimuli-responsive polymer nanoparticles obtained by emulsion and miniemulsion polymerization for production of recycable carpet
Grantee:MAURÍCIO PINHEIRO DE OLIVEIRA
Support Opportunities: Regular Research Grants