Polymethacrylate Resins

Type of column Polymethacrylate Polyvinyl resin Polymethacrylate Polymethacrylate... 

Unimdl [Bayer Miles] nithalates plas ticizers for PVC, calendering, extru sion, inj. molding, VC copolymers PVAc, surf, coatings, adhesives, rub ber, PS, NC, ethyl cellulose, CAB acrylic surf, coatings, alkyd resins, polymethacrylate, rubber. 

Medicine. The polymethacrylates have been used for many years in the manufacture of dentures, teeth, denture bases, and filling materials (116,117) (see Dental materials). In the orthodontics market, methacrylates have found acceptance as sealants, or pit and fissure resin sealants which are painted over teeth and act as a barrier to tooth decay. The dimensional behavior of curing bone-cement masses has been reported (118), as has the characterization of the microstmcture of a cold-cured acryUc resin (119). Polymethacrylates are used to prepare both soft and hard contact lenses (120,121). Hydrogels based on 2-hydroxyethyl methacrylate are used in soft contact lenses and other biomedical appHcations (122,123) (see Contactlenses). 

Polymethacrylates. Poly(methyl methacrylate) [9011-14-7] is a thermoplastic. Itis the acryUc resin most used in building products, frequendy as a blend or copolymer with other materials to improve its properties. The monomer is polymerized either by bulk or suspension processes. Eor glazing material, its greatest use, only the bulk process is used. Sheets are prepared either by casting between glass plates or by extmsion of pellets through a sHt die. This second method is less expensive and more commonly used. Peroxide or azo initiators are used for the polymerization (see Methacrylic polymers). 

A number of polystyrene resins with significant residual double-bond contents have been used for grafting of polar hydrophilic polymethacrylate-polyethylene... 

Methacrylic acid and its esters are useful vinyl monomers for producing polymethacrylate resins, which are thermosetting polymers. The extruded polymers are characterized by the transparency required for producing glass-like plastics commercially known as Plexiglas ... 

Raynolds, S., "The Dependence of Physical Properties on the Constitution of Alkyl Polymethacrylate-ester Resins", Thesis, Master of Science, University of Pittsburgh, 1954. 

In polystyrene, polymethacrylate, unsaturated polyester resins, or similar media, P.R.31 affords highly transparent colorations of medium red shades, which are used as automobile tail lights and for other signalling purposes. Its heat stability in... 

Perchlorate explosives for mining, and technical methods of manufacturing chlorate explosives, will be discussed later (pp. 520-521). Mixtures of potassium perchlorate or ammonium perchlorate with plastics or elastomers have recently come into extensive use for jet propulsion (e.g. methyl polymethacrylate, ester resins, and thiokol-rubber). 

Figure 3.18 Commercially available resins (A) polystyrene-divinylbenzene (B), (C) polymethacrylate-based copolymers. (Reprinted from Ref. 16 with permission.)...

Another technique for removing spillage from a diked area is the use of an all-purpose sorbent. The effectiveness of using sorption as a removal technique is influenced by factors such as the physical and chemical attraction between the spilled material and the sorbent, the surface geometry and area of the sorbent, the contact time between the materials, and the density ratio of the spilled fluid and the sorbent (Bauer et al., 1975). Some effective sorbents include polymethacrylate foam resins, propylene fibers, molecular sieves, expanded clays, polyolefins, polymethylmethacrylates, and polystyrene sulfonates (Bauer et al., 1975). 

Polystyrenes cross-linked with divinylbenzene commercial resins, such as Lewatit VP-OC 1163 (Bayer AG, Leverkusen, Germany), Amberlite XAD-4 (Rohm Haas, Frankfurt, Germany), and Serdolite PAD I, PAD II, and PAD III (Serva AG, Heidelberg, Germany), have been applied in the adsorption of phenol, chlorophenols, and dihydroxybenzenes from water solutions [90]. Besides, commercial polymethacrylate/divinylbenzene resins, for example, Supelcogel TPR-100... 

Fig. 2.77. Ion-exchange resins, a = nafion b = the Asahi structure similar to nation s c = polyimines d = polyphosphates e = polyacrylic add f = polymethacrylic acid g = polyvinylpyridine h = polysterene sulphonic add.

Felton LA, McGinity JW. Influence of plasticisers on the adhesive properties of an acrylic resin copolymer to hydrophilic and hydrophobic tablet compacts. Int J Pharm 1997 154(2) 167—178. Okarter TU, Singla K. The effects of plasticisers on the release of metoprolol tartrate from granules coated with a polymethacrylate film. Drug Dev Ind Pharm 2000 26(3) 323—329. 

Styrene/divinylbenzene copolymers, polymethacrylate, and polyvinyl resins are the most important organic compounds that were tested for their suitability as substrate materials in the manufacturing process for polymer-based anion exchangers. 

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