Polyacrylate

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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 ?
[USPRwire, Tue Dec 11 2018] Acrylic Monomers Market : Introduction Acrylic monomers are used to form acrylate polymers that have a similar structure to acrylic acid.
[ClickPress, Tue Dec 11 2018] Acrylic Monomers Market : Introduction Acrylic monomers are used to form acrylate polymers that have a similar structure to acrylic acid.
The second volume is devoted to aspects of applications, among them, fluoroalkyl acrylate polymers and their applications, fluoroplastics and fluoroelastomers: basic chemistry and high-performance applications, the commercial synthesis and applications of poly(vinylidene fluoride), fluoridated ionomers and ionomer membranes: monomer and polymer synthesis and applications, and fabricating flexible transparent nanohybrids with heat-resistant properties using a fluorinated crystalline polymer.
Its Objet 3D printer, supplied by Stratasys, Eden Prairie, Minn, (stratasys.com), uses inkjet-style deposition of UV-curable acrylate polymers. It "runs every day and overnight," according to Loftus.
Evaluating mechanical test results, they showed compatibility effect between synthetic urethane acrylate polymers and 3 biopolymers; also inorganic silica showed good compatibility with the urethane acrylate system.
It contains unique, transparent acrylate polymers that deliver a luminous solid shield for the ultimate in elasticity and breakage resistance.
Polymers that have hydrophobic networks, such as aromatic polymers and alkyl acrylate polymers, are used as absorbent materials for removing petroleum and petroleum-derived organic solvents from water surfaces (22-28).
"Based on state-of-the art silyl acrylate polymers, true hydrolysing and an optimised biocide combination, SeaQuantum Static is self smoothing and self polishing, has a low build-up of leach layer and good mechanical properties." In other Jotun-related developments of this year, a vessel that had coats of Jotun paints went on to receive the Ship of the Year 2008 award.
Moreover, water-based UV-cured coatings have been shown to combine the flexible properties of high molecular weight polymers with the hardness of crosslinked acrylate polymers. (9) The potential of water-based resins and their performance in UV-radiation curing has already been investigated.
The Hochberg study concluded that the most important dispersants from a market value viewpoint are the acrylate polymers and terpolymers, naphthalene sulfonate condensate, hydrocarbons such as [C.sub.9] and DCPD, phosphates, modified rosin esters, ethoxylated nonionics, rosin resinates and dimer-based polyamides.
Fluorinated acrylate polymers are an exception, dissolving well in carbon dioxide.