1、Preparation and Properties of Poly(vinyl acetate) Adhesive Modified

Jun Wu et al. synthesized a series of poly (vinyl acetate-co-dibutyl maleate) latex particles through three methods. One of the methods was prepared in the presence of an anionic surfactant, sodium dodecyl sulfate (SDS). The other two were prepared in the presence of poly (vinyl alcohol).

2、Preparation of Polyvinyl Acetate Latexes Using Polymethacrylic Acid

These results show that 70-80% of the polymethacrylic acid is strongly adsorbed on the polyvinyl acetate latex particle surfaces and the remainder is solute polymer in the aqueous phase; little, if any, is grafted to the particle surface.

3、Preparation of Polyvinyl Acetate Latexes Using

Polymethacrylic acid functions as a protective colloid in the emulsion polymerization of vinyl acetate, particularly in combination with anionic-nonionic surfactants.

4、Synthesis of Polyvinyl Acetate Latex

Protocol for Synthesis of Polyvinyl Acetate (PVAc) Homopolymer Latex This protocol describes the synthesis of a standard PVAc homopolymer latex suitable for interior paint formulations.

5、Improving the adhesion strength and moisture resistance of poly(vinyl

Polyvinyl acetate (PVAc) is a relatively low-cost petroleum-based adhesive system that is generally prepared via emulsion polymerization. It is widely applicable in many industries especially wood since long time because it is characterized by providing a good adhesion to various substrates.

Preparation of poly (vinyl acetate) latex with ultrasonic and redox

Vinyl acetate polymer solution was prepared in methanol and was used as triplet quencher additive to improve efficiency and photostability performance.

Preparation of high

Preparation of high-performance white latex using polyvinyl acetate PVAC-ethanol system. • Solvent: Anhydrous ethanol (purity ≥95%), in an amount of 3–5 times the mass of PVAc (polyvinyl acetate solid resin).

Preparation and Characterization of Soap

The soap-free emulsion of vinyl acetate (VAc)/butyl acrylate (BA) copolymer was prepared by a semi-continuous and pre-emulsification polymerization method, using ammonium sulfate allyloxy nonylphenoxy poly (ethyleneoxy) (10) ether (DNS-86) as a reactive emulsifier.

An Introduction to the Scientific Process: Preparation of Poly(vinyl

Preparation of a poly (vinyl acetate) latex and testing of its capacity to act as a glue was found to be a very successful way to introduce students not only to the chemistry of free radical polymerization in emulsion, but to the scientific method.

Study on the Synthesis Process of Polyvinyl Acetate Emulsions

Polyvinyl acetate emulsion (PVAc), commonly known as white latex, are widely used as a key polymer adhesive due to their ability to be directly modified with a variety of additives, excellent mechanical strength, and resistance to adhesive defects.

Preparation of Polyvinyl Acetate Latex

Introduction

Polyvinyl acetate (PVAc) latex is an important polymer material, widely used in textiles, leather, paper coating, paints, and adhesives. It exists in the form of emulsion and is polymerized from polyvinyl acetate monomers. This article will provide a detailed introduction to the preparation process of polyvinyl acetate latex.

I. Raw Material Preparation

1. Polyvinyl Acetate Monomer: As the main raw material for preparing latex, high purity and narrow molecular weight distribution monomers need to be selected.
2. Initiator: Used to initiate the polymerization reaction of the monomer. Common initiators include persulfates, azodiisobutyronitrile, etc.
3. Emulsifier: Used to reduce the solubility of the polymer in water, enabling the formation of a stable emulsion. Common emulsifiers include polyvinyl alcohol, polyoxyethylene, etc.
4. pH Regulator: Used to adjust the pH value of the emulsion, making it suitable for the polymerization reaction. Common pH regulators include ammonia, sodium hydroxide, etc.
5. Stabilizer: Used to prevent the precipitation or coagulation of the emulsion during storage and use. Common stabilizers include polyvinyl alcohol, sodium polyacrylate, etc.

II. Preparation Process

1. Mixing: First, mix the polyvinyl acetate monomer with the initiator and pH regulator according to a certain proportion, stirring thoroughly until uniform.
2. Emulsification: Add the mixed solution to an emulsification device, disperse the polymer into fine particles through means such as high-speed shearing and ultrasound, forming an emulsion.
3. Stabilization Treatment: To improve the stability of the emulsion, a certain amount of stabilizer can be added for stabilization treatment.
4. Filtration: Filter the treated emulsion to remove large impurities, obtaining pure latex.
5. Storage: Place the filtered latex in a sealed container and store it in a cool, dry place, avoiding direct sunlight and high temperatures.

III. Influencing Factor Analysis

1. Monomer Concentration: Excessively high or low monomer concentration will affect the stability and performance of the emulsion, which needs to be adjusted based on experimental results.
2. Initiator Dosage: Insufficient initiator usage may lead to incomplete polymerization, while excessive initiator usage may cause the emulsion to become unstable.
3. Emulsification Conditions: Emulsification time, temperature, and speed parameters greatly influence the stability of the emulsion and need to be adjusted according to actual situations.
4. pH Value Control: Excessively high or low pH values will affect the stability of the emulsion; thus, pH value range must be strictly controlled.
5. Stabilizer Addition: The amount and type of stabilizer will impact the stability of the emulsion and need to be adjusted according to specific circumstances.

IV. Application Prospects

Due to its excellent performance, polyvinyl acetate latex has broad application prospects in many fields. For example, in the textile industry, it can be used as a softener, antistatic agent, etc.; in the leather industry, it can serve as a finishing agent, adhesive, etc.; in the papermaking industry, it can act as a coating agent, adhesive, etc. due to its good stability and water resistance, polyvinyl acetate latex can also be applied in paints and adhesives. With advancements in technology and changes in market demand, the application scope of polyvinyl acetate latex will further expand.

The preparation of polyvinyl acetate latex is a complex process that requires strict control of various factors to ensure product quality. By continuously optimizing process parameters and exploring new application areas, polyvinyl acetate latex is expected to play a greater role in the future.