Polyester resins hydroxide

This monomer is prepared by reacting cyanuric chloride with excess allyl alcohol in the presence of sodium hydroxide at 15-20°C. Laminates based on polyester resins containing triallyl cyanurate are claimed to be able to withstand a temperaure of 250°C for short periods. 

Magnesium oxide and hydroxide are incorporated into polyester resins for the purpose of modifying the viscoelastic response of the compound. The... 

A wide range of chemical agents, catalysts and conditions for the glycolysis of unsaturated polyester resins, used in the manufacture of buttons, have been described in a recent patent.34 In addition to different metal acetates, the following compounds have been proposed to be catalytically active in PET glycolysis sodium methylate, sodium ethylate, sodium hydroxide, methane-sulfonic acid, magnesium oxide, barium oxide and calcium oxide. Different applications of the depolymerization products were described, e.g., preparation of fresh unsaturated polyesters by reaction with maleic acid, maleic acid/ phthalic anhydride or maleic anhydride/terephthalic acid or the synthesis of polyurethane resins by reaction with a diisocyanate. 

The unsaturated polyester resin with trade mark Mitsubhisi Yukalac type BQTN and its catalis is used as a matrix. The palm fibre or palmyra(from arenga pinnata reinforcement in this experiments were obtain from Sibolangit around 50 Km from Medan with diameter 0.2 - 0.3 mm, and the coir(from cocos nucifera lynn) were obtain from Lubuk Pakam around 30 Km from Medan and around 3 Km from sea-side with 0.2 - 0.3 mm diameter. As chemical solvent was used sodium hydroxid for treated of the fibres from E. Merck. 

Solvents such as benzene, carbon disulfide, ether, methyl ethyl ketone, toluene, xylene, trichloroethylene, and trichloroethane will attack the resin. Sulfuric acid above 70%, sodium hydroxide, and 30% chromic acid will also attack the resin. Refer to Table 3.8 for the compatibility of bisphenol-A fumarate polyester resin with selected corrodents. Table 3.9 lists the compatibility of hydrogenated bisphenol-A fumarate polyesters with selected corrodents. Reference [1] provides a more comprehensive listing. 

Chem. Descrip. Aluminum hydroxide CAS 21645-51-2 EINECS/ELINCS 244-492-7 Uses Eiller, flame retardant for polyester resins (SMC, BMC, laminates), epoxy and acrylic resins, crosslinked elastomers (conveyor belts, cables, profiles, molded parts), latexes (wall paper, carpetbacking), thermoplastics and thermoplastic elastomers (PP, PE and copolymers, EVA), PVC... 

Magnesium hydroxide (ca. 1909) n. Mg (0H)2. Used as a thickening agent for polyester resins. Its action is slower than that of magnesium oxide. 

Conventional SMC is prepared from unsaturated polyester resin and styrene, together with magnesium or calcium oxides or hydroxides. The bases serve to thicken the styrene-polyester solution, probably through ionomer formation.Usually, SMC is used together with fillers such as calcium carbonate and glass fiber reinforcement for high modulus. 

Sheet molding compoimd (SMC) is used in the manufactin-e of large reinforced compression moldings, which are employed extensively in automotive panels. SMC is prepared as a sandwich, rolled between two polyethylene films it contains polyester resin, filler (usually calcium carbonate), and 20-30 wt% chopped glass fibers. Other components such as peroxides for cross-finking, thermoplastic additives for shrinkage control, and alkahne-earth oxides and hydroxides to assist maturation are present in smaller amounts. Maturation involves a thickening... 

The polyester mortars were originally developed to resist chlorine dioxide. There are a number of types of polyester resins available. The ones most commonly used are the isophthalic, chlorendic, and Bisphenol A fumurate. Depending on the application, the polyester mortars can be formulated to incorporate carbon and silica fillers. One hundred percent carbon fillers are used to resist hydrofiuoric acid, fiuorine chemicals, and strong alkalies such as sodium and potassium hydroxide. The chlorendic and Bisphenol A fumurate resins have improved chemi-... 

These resins have many of the same properties as the epoxy, acrylic, and Bisphenol A fumurate resins. The vinyl ester resins have replaced polyester resins in mortars for bleach towers in the pulp and paper industry. The major advantage of these resin systems is their resistance to most oxidizing mediums and high concentrations of sulfuric acid, sodium hydroxide, and many solvents. Comparative resistances of the two types of vinyl ester mortars are shown in Table 7.13. 

A hybrid thermoplastic polyester resin formulated for use in SMC/BMC applications and containing 22% recycled content. The resin provides excellent low profile properties for both structural and zero shrink applications and is soluble in many types of unsaturated polyester resin. It may be thickened using standard alkaline oxides and/or alkaline hydroxides and offers superior hot strength, impact properties and excellent bond and paint adhesion. 

The chemical thickening reaction that takes place involves reaction of the carboxyl groups on the unsaturated polyester resin with alkaline earth oxides or hydroxides such as magnesium oxide, magnesium hydroxide, calcium hydroxide or calcium oxide as illustrated below. 

Magnesium Oxide n (ca. 1909) (magnesia, periclase) A white powder used as filler and as a thickening agent in polyester resins. It occurs naturally as the mineral periclase, but it is usually made in purer form by calcining magnesium hydroxide or carbonate. 

The measurement of acid number (or base number) during the course of a reaction. For example, in the production of polyester resins by the reaction of a glycol with maleic and phthalic acids, the total acid remaining is determined by titration of a weighed sample with potassium hydroxide using phenolphthalein as indicator. 

Fire resistance is an important property of phenolic resins. The combination of phenolic resin with Expancel expandable microspheres leads to many useful products. Composites for high speed train interiors take advantage of the light weight, excellent fire rating, and very low thermal conductivity. Polyester filled with aluminum hydroxide is an alternative solution for train interior materials. The resin and filler can be easily processed when viscosity regulating additives are added. 

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