Polyacrylate

polyacrylate

[¦päl·ē′ak·rə‚lāt]
(organic chemistry)
A polymer of an ester or salt of acrylic acid.

Polyacrylate

 

a polymer of esters of acrylic acid or methacrylic acid, with the general formula

where R′ = H or CH3 (for acrylic and methacrylic acids, respectively) and R is an aliphatic, carbocyclic, or heterocyclic group.

Polyacrylates containing the R groups methyl (— CH3), ethyl (—C2 H5), n-butyl (—C4 H9) and cyclohexyl (—CeH11) are of the greatest industrial importance. These polyacrylates are transparent thermoplastic polymers that are physiologically harmless and readily soluble in organic solvents and are characterized by low resistance to oil and gasoline.

Polyacrylates are produced by polymerization of esters of acrylic and methacrylic acids (acrylates and methacrylates, respectively). Polymerization of a mixture of acrylates whose chemical structure differs in the nature of the R group yields high-strength multipurpose materials.

Polyacrylates are used in the production of organic glass (mainly polymethyl methacrylate), films, paints and varnishes, adhesives, and impregnation compositions for paper, leather, wood, and fabrics. Polyacrylates are widely used in medicine, especially in dentistry, for the preparation of artificial jaws and teeth and for fillings. Acrylate polymers and copolymers are used to make prostheses and contact lenses, as well as special castings for preserving various items. Acrylates are widely used as como-nomers to increase the plasticity of rigid polymers and to produce acrylic rubbers.

REFERENCES

See References under POLYMER.

V. P. SHIBAEV

References in periodicals archive ?
The report"Super Absorbent Polymer Market by Type (Sodium Polyacrylate, Polyacrylate/Polyacrylamide Copolymer, and Others), by Application (Personal Care, Agriculture, Medical, Industrial and Others ), by Region - Trends & Forecasts to 2020", published by MarketsandMarkets, The global Market is projected to be worth USD 7.
Tenders are invited for Supply of sodium polyacrylate, appearance white powder, purity 99%.
Oriani developed heat-resistant EVA copolymer compositions consisting of a blend of EVA copolymer, peroxide-curable polyacrylate elastomer, and polyamide.
Among these, sodium polyacrylate accounted for approximately 63.
Information is provided on the following products: Nipol nitrile elastomers; Nipol carboxylated nitrile elastomers; Nipol terpolymer elastomers; Nipol liquid nitrile elastomers; Nipol nitrile powder and crumb elastomers; Zealloy modifiers for thermoplastics; DuoMod tougheners; Nipol and Sivic polyblends and oilextended nitrile elastomers; Chemisat HNBR latex; Zetpol hydrogenated nitrile elastomers; Zetpol HP HNBR; Zetpol EP HNBR; Zetpol ZLX HNBR latex; Zeoforte modified hydrogenated nitrile elastomers; HyTemp polyacrylate elastomers; HyTemp high-performance polyacrylate elastomers; HyTemp polyacrylate curatives and additives; Hydrin polyepichlorohydrin elastomers, and more.
Bayer MaterialScience has developed a new polyacrylate binder for use in formulating topcoats with a very low concentration of volatile organic compounds (VOC).
Other areas explored include cohesive mixing, preparation of a cationic polyacrylate emulsion paper-strengthening agent, intelligent drilling tools, a new portable toilet design, and sensing properties of carbon-coated filaments.
The recipe calls for a few grams of clay, 100 grams of water, a dash of the thickening agent sodium polyacrylate and an organic "molecular glue.
Zeotherm combines a nylon 6 matrix with a crosslinked polyacrylate (ACM) rubber.
The resins made were based on very different chemistries: (1) a 100% solids polyacrylate functional oligomer from the Michael reaction between a polyacrylate monomer and an acetoacetate ester; (2) an acrylate functional monomer from the reaction between an epoxy ester and acrylic acid; and (3) a solvent-based isocyanate-terminated polyurethane prepolymer from the reaction between a mixture of diols and excess diisocyanate.
The pads are made of tree-based viscose rayon, fluffed wood pulp (bleached with the elemental chlorine-free process) and sodium polyacrylate super absorber.
Polyacrylate (PA) is frequently used along with cotton pads to soak up excess purge water, reducing the potential for odors to occur in products.