High solid content latex: Preparation methods and application

Ai, Zhaoquan; Deng, Rui; Zhou, Qilong; Liao, Shuijiao; Zhang, Hongtao

doi:10.1016/j.cis.2010.05.003

Cited by 30 publications

(13 citation statements)

References 74 publications

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“…4) [68,69]. These results are consistent with other findings which illustrate that reducing of particle size, increasing of solid contents and M v are more intensive in viscosity of the latex [68][69][70].…”

Section: Effect Of Pdms Surfactant Concentration On the Copolymerizatsupporting

confidence: 89%

“…Studies of high solids content lattices have shown that the latex viscosity at a fixed shear rate is directly dependent on the polymer concentration and molecular weight (as already emphasized in Fig. 5) [68,69]. The viscosity also increases with decreasing particle size and increasing volume fraction ([) of latex particles (Fig.…”

Section: Effect Of Pdms Surfactant Concentration On the Copolymerizatmentioning

confidence: 83%

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Novel Synthesis Method and Characterization of Poly(vinyl acetate‐butyl acrylate) Latex Particles: Effect of Silanol‐Terminated Poly(dimethylsiloxane) Surfactant on the Seeded Emulsion Copolymerization

Ghorbani

Zohuri

Gholami³

2017

J Surfact & Detergents

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In a conventional semi‐batch seeded emulsion copolymerization of vinyl acetate/butyl acrylate (VA/BA) using hybrid surfactants namely, dioctyl sulfosuccinate (DOSS) as an anionic surfactant, nonylphenol ethoxylate (KENON 30) as a non‐ionic type, and polydimethylsiloxane surfactant (having hydrophilic silanol‐terminated, called PDMS). The effect of PDMS on the properties of the latex synthesized was investigated by measuring solid content, viscosity, colloidal stability, particle size distributions of the base latex, viscosity average molecular weight (M¯v) of the copolymer, latex particle morphology, glass transition temperature (Tg) of a copolymer and thermal gravimetric analysis (TGA). Particle size of the base latex decreases (Z‐average from 246.48 to 143.69 nm) upon increasing the amount of PDMS surfactant in the recipe (up to 6 wt%). The presence of PDMS surfactant in the hybrid surfactants led to a significant increase in the solid content (from 48.71 to 51.31 wt%), viscosity (from 334 to 806 centipoise, cp) and M¯v (from 1.91 × 105 to 2.34 × 105 g mol−1). Thermal stability and Tg of the copolymer were increased with addition of PDMS surfactant (thermal stability from 344.77 to 389.81 °C and Tg from −20.7 to 21.7 °C). The colloidal stability evaluated using the electrolyte addition method was improved with addition of PDMS surfactant. The uniform morphological structure of the final particle is the main effect of using PDMS in the hybrid surfactants.

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Section: Effect Of Pdms Surfactant Concentration On the Copolymerizatsupporting

confidence: 89%

Section: Effect Of Pdms Surfactant Concentration On the Copolymerizatmentioning

confidence: 83%

Novel Synthesis Method and Characterization of Poly(vinyl acetate‐butyl acrylate) Latex Particles: Effect of Silanol‐Terminated Poly(dimethylsiloxane) Surfactant on the Seeded Emulsion Copolymerization

Ghorbani

Zohuri

Gholami³

2017

J Surfact & Detergents

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“…Recently, it was reported that the rate of copolymerization of itaconic acid (IA), acrylic acid (AA), and methacrylic acid (MAA) with butyl acrylate (BuA) in separate reactions was found to increase in the order IA < AA < MAA, i.e., the rate increases as the hydrophobicity of the monomer increases. 22 The copolymerization of BuA with AA (acidic portion) tends to produce significant amounts of water-soluble polymer, and that portion of the copolymer is usually located near to the outer surface of the latex particles. In the case of MAA, a significantly less water soluble polymer was formed, and the MAA portion in the copolymer is somewhat more dispersed within the latex particles.…”

Section: Tem Of the Prepared Copolymer Emulsionsmentioning

confidence: 99%

Synthesis and application of methyl methacrylate/butyl acrylate copolymer nanoemulsions as efficient retanning and lubricating agents for chrome‐tanned leather

Nashy

Essa

Hussain

2011

J of Applied Polymer Sci

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Two different nano‐emulsions based on methyl methacrylate/butyl acrylate copolymers have been synthesized to be used as retanning and lubricating agents for chrome‐tanned leather. The main difference and characteristics of the two prepared copolymers were studied. The nano particle size of the two copolymers was confirmed using transmission electron microscope (TEM). The influence of the prepared copolymers on chrome‐tanned leather as retanning agents was investigated. The properties of the retanned leather, namely, physicomechanical properties as tensile strength, elongation at break and water absorption, were measured. Thermal gravimetric analysis (TGA) technique was used to examine the thermal stability of the retanned leather. Also, the texture of the grain surface and fibers were inspected using scanning electron microscope (SEM). The retanned leather showed an improvement in its physicomechanical properties, as well as enhancement of its thermal stability as compared with the chrome‐tanned leather. Furthermore, the retanned leather has uniform dyestuff, softness, and firmness of grain. All these promising results provide evidence to the applicability of the prepared copolymer emulsions as efficient retanning and lubricating agents for chrome‐tanned leather. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

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“…It is desirable to avoid or minimize the water, which acts as the dispersion medium for the prepared latexes so that the transportation costs can be reduced . Generally high solid content latexes are prepared that requires a minimal amount of water to reduce the energy wastage or the removal of water after emulsion polymerization . The most economical way is to have the prepared latexes as a dry powder which can be redispersed readily at the site of application.…”

Section: Introductionmentioning

confidence: 99%

Anchored block‐copolymer surfactants for the synthesis of redispersible polystyrene latexes

Keerthika

Jayalakshmi

Ramkumar

2019

J of Applied Polymer Sci

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Redispersible polystyrene (PS) latexes of particle sizes in the range of 200-220 nm was prepared using low-molecular-weight amphiphilic block copolymer surfactants. Latex powders were obtained by sun drying of the prepared PS latexes and were reintroduced into the solution by simple mechanical agitation/stirring without any additives. DLS and SEM analysis were carried out for pristine/sundried latexes to compare the size and shape of the particles. A series of block copolymers with 2-methyl-2-oxazoline and 2-butyl-2-oxazoline or 2-phenyl-2-oxazoline with repeat units 30/20, 60/20, 15/30, and 15/45 were synthesized through cationic ring opening polymerization (CROP) and were used as nonionic surfactants (NIS) in the preparation of poly(styrene) latexes by emulsion polymerization. In this work, we investigated the role of anchoring ability of butyl/phenyl groups of the block copolymer in providing stability and redispersibility of the latex by comparing with simply cetyl and stearyl surfactants that are devoid of such functionality. The ready redispersibility and retainment of size and shape as that of original latexes confirmed the role of anchoring groups. PS latexes prepared by block-copolymer surfactants that are devoid of anchoring units showed lesser stability and no redispersibility compared to anchored surfactants.

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High solid content latex: Preparation methods and application

Cited by 30 publications

References 74 publications

Novel Synthesis Method and Characterization of Poly(vinyl acetate‐butyl acrylate) Latex Particles: Effect of Silanol‐Terminated Poly(dimethylsiloxane) Surfactant on the Seeded Emulsion Copolymerization

Novel Synthesis Method and Characterization of Poly(vinyl acetate‐butyl acrylate) Latex Particles: Effect of Silanol‐Terminated Poly(dimethylsiloxane) Surfactant on the Seeded Emulsion Copolymerization

Synthesis and application of methyl methacrylate/butyl acrylate copolymer nanoemulsions as efficient retanning and lubricating agents for chrome‐tanned leather

Anchored block‐copolymer surfactants for the synthesis of redispersible polystyrene latexes

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