Polyvinyl Acetate


Also found in: Dictionary, Thesaurus, Medical, Acronyms, Wikipedia.

polyvinyl acetate

[¦päl·i′vīn·əl ′as·ə‚tāt]
(organic chemistry)
(H2CCHOOCCH3)x A thermoplastic polymer; insoluble in water, gasoline, oils, and fats, soluble in ketones, alcohols, benzene, esters, and chlorinated hydrocarbons; used in adhesives, films, lacquers, inks, latex paints, and paper sizes. Abbreviated PVA; PVAc.

Polyvinyl Acetate

 

a polymer of vinyl acetate, [—CH2—CH(OCOCH3)—]n. Polyvinyl acetate is a hard, colorless, and nontoxic substance with a molecular weight of 10,000–1,500,000, depending on preparation conditions. It is soluble in many organic solvents but not in gasoline, mineral oils, or water. Polyvinyl acetate softens at low temperatures (26°-28° C) and exhibits cold flow and high adhesion to various materials.

Polyvinyl acetate is produced by the free-radical polymerization of a monomer in a solution, emulsion, or suspension. It is produced in the form of granules (beads), aqueous dispersions, or varnish solutions. Polyvinyl acetate is an intermediate product in the synthesis of polyvinyl alcohol and polyvinyl acetals. It is used in the manufacture of interior and exterior emulsion paint finishes and adhesives for wood, paper, leather, and fabrics.

It is added to concrete to improve its quality and is used in the production of seamless floors and chewing gum.

In the USSR, polyvinyl acetate products are known by various trade names. Alcohol solutions include brands S-4, 8,12,18, and 26 (the numbers indicate the mean viscosity in centipoises). Beads include nos. 15, 25, 50, 75, and 100, and aqueous dispersions are known as NV, SV, and VV. Outside the USSR, aqueous dispersions are primarily produced; trade names include Gelva and Vinylite (USA), Evaflex (Japan), Rhodopas (France), and Alkathene (Great Britain).

World production of polyvinyl acetate in 1973 was about 1 million tons.

REFERENCES

See references under .

E. N. ROSTOVSKII

polyvinyl acetate, PVA

A colorless, thermoplastic, water-insoluble resin; used as a latex binder in certain paints.
References in periodicals archive ?
Cellulose nanowhiskers (CNWs)-based polyvinyl acetate (PVAc) nanocomposites were prepared by meltblending using a master-batch with high CNW content in water dispersible PVAc.
Phenol and polyvinyl acetate (PVAC) were obtained from BDH Laboratory supplies, England and were used as purchased without further purification.
Our portfolio includes a wide range of cyclodextrins and polyvinyl acetates that we added with the Air Products acquisition.
The FTIR peaks of the produced polyvinyl acetate were in good agreement with the standard curve.
The Vinyl Acetate and Polyvinyl Acetate Market Research report provides a brief introduction of the industry.
Around [euro] 40 million investment at integrated production site in Nanjing; doubling of dispersion capacity to 120,000 metric tons per year; new plant for polyvinyl acetate solid resins.
The TufCor line is based on a range of chemistries including vinyl acetate/ethylene (VAE), polyvinyl acetate homopolymers, and acrylic polymers for applications that include tape-joint and joint compounds, caulks and sealants, mastics, cement bonding and liquid admixtures, and spackling compounds.
The TufCOR product line is based on a range of chemistries including vinyl acetate/ethylene (VAE), polyvinyl acetate homopolymers, and acrylic polymers for applications such as tape-joint and joint compounds, caulks and sealants, mastics, cement bonding and liquid admixtures, and spackling compounds.
Wacker is also working on new developments in its Vinnapas polyvinyl acetate (PVAc) low-shrink/low-profile additives for thermoset polyester molding compounds.
Small clay particles can agglomerate with polyvinyl acetate (PVAc) to form neutral-buoyancy aggregates.
In the nine years since Louisiana-Pacific's Ottawa, Ohio, plant switched to ISOSET adhesives from polyvinyl acetate, the plant has become more productive in the manufacture of its wood windows and doors.
In this research, Frost & Sullivan's expert analysts thoroughly examine the following product types: polyvinyl acetate (PVA), styrene acrylic emulsion, pure acrylic emulsion, and vinyl acrylic emulsion.