Stabilization, plastic sulfur

Bordoloi, . K. Pearce, E. M. "Plastic Sulfur Stabilization by Copolymerization of Sulfur with Dicyclopenta-diene" ADV. CHEM. SER. 1978, 165, 31. 

Plastic Sulfur Stabilization by Copolymerization of Sulfur with Dicyclopentadiene... 

Attacks some plastics, rubber, and coatings. Water solutions attack carbon steels at room temperature and stainless steels (especially if stabilized with sulfuric acid) above 176°F/80°C. Safety reminder When using HCN, it is xmwise to work alone. On small fires, use alcohol-resistant foam, dry chemical, or COj extinguishers. FORMOSA CAMPHOR (76-22-2) see camphor. 

When drawn into thin filaments, sulfur exhibits like many other materials in this form outstanding strength properties (1,2,3), If quench cooled from above the transition temperature, it exhibits its plastio-elastic behavior. Although great effort has been expended searching for additives and techniques to stabilize plastic-elastic sulfur, little success has been achieved. There are only a few additives that stabilize these characteristics for even short periods of time. They include the elements ... 

Lead forms a normal and an acid sulfate and several basic sulfates. Basic and normal lead sulfates ate fundamental components in the operation of lead-sulfuric acid storage batteries. Basic lead sulfates also ate used as pigments and heat stabilizers (qv) in vinyl and certain other plastics. 

Methylphenol is converted to 6-/ f2 -butyl-2-methylphenol [2219-82-1] by alkylation with isobutylene under aluminum catalysis. A number of phenoHc anti-oxidants used to stabilize mbber and plastics against thermal oxidative degradation are based on this compound. The condensation of 6-/ f2 -butyl-2-methylphenol with formaldehyde yields 4,4 -methylenebis(2-methyl-6-/ f2 butylphenol) [96-65-17, reaction with sulfur dichloride yields 4,4 -thiobis(2-methyl-6-/ f2 butylphenol) [96-66-2] and reaction with methyl acrylate under base catalysis yields the corresponding hydrocinnamate. Transesterification of the hydrocinnamate with triethylene glycol yields triethylene glycol-bis[3-(3-/ f2 -butyl-5-methyl-4-hydroxyphenyl)propionate] [36443-68-2] (39). 2-Methylphenol is also a component of cresyHc acids, blends of phenol, cresols, and xylenols. CresyHc acids are used as solvents in a number of coating appHcations (see Table 3). 

Kaolinite is the main constituent in china clay used to make porcelain. The layers are largely held together by van der Waals forces. Bentonite is used in cosmetics, as a filler for soaps, and as a plasticizer, and it is used in drilling-muds as a suspension stabilizer. Bentonite and kaolinite clays are used, after treatment with sulfuric acid to create acidic surface sites, as petroleum cracking catalysts. Asbestos also has a layered structure (Section 12.13). 

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