Sodium hydroxide polyester resins

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. 

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. 

Formic acid (methanoic acid) n. HCOOH. The first of the aliphatic acids, with a pungent odor and probably existing mostly in the dimmer form, formic acid is produced by the reaction of carbon dioxide and dry sodium hydroxide followed by treatment with sulfuric acid. It is a solvent for phenol-formaldehyde resins, some polyesters, polyurethanes, and nylons. 

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. 

To determine the structure of the polyesters, they were hydrolyzed by refluxing in dilute, aqueous sodium hydroxide solution (Fig. 19). The mixture was acidified with Amberlyst-15 ion-exchange resin, and the water was removed in vacuo. For the polymer prepared from tetraisopropyl titanate (Tyzor TPT), the hydrolysis product was identified as hydroxy acid j. This result confirmed the work of Moore and Kelly.However, for the polymer prepared with triisobutyl aluminum as catalyst, hydrolysis gave a white solid. 

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