Polysulfides Thiokols

Polysulfides cure at room temperature and reach maximum strength in 3—7 days. Polysulfides and epoxies are mutually soluble in all proportions. Polysulfides are also alloyed with phenolics.  

Reinforcing filler to increase strength and reduce cost 

humidity, and sulfur will accelerate the 77,78 cure.  

---

Various organic dihalides are employed in a reaction with sodium polysulfide to produce organic polysulfides (Thiokols). Ethylene dichloride, from the direct chlorination of ethylene, dichloroethyl formal, and /3,0 -dichlorodiethyl ether are the principal dihalides that have been employed in the process (44). These elastomeric polymers have been commercially available for a number of years, and many applications have been developed for them. They have excellent oil resistance and one of their principal uses has been in hose and tank linings in which that property is required. 

RUBBER (Synthetic). Any of a group of manufactured elastomers that approximate one or more of the properties of natural rubber. Some of these aie sodium polysulfide ( Thiokol ). polychloiopiene (neoprene), butadiene-styrene copolymers (SBR), acrylonitrilebutadiene copolymers (nitril rubber), ethvlenepropylene-diene (EPDM) rubbers, synthetic poly-isoprene ( Coral, Natsyn ), butyl rubber (copolymer of isobutylene and isoprene), polyacrylonitrile ( Hycar ). silicone (polysiloranei. epichlorohy-drin, polyurethane ( Vulkollan ). 

Celanese Corporation commercially produces acetate fibers The first mobile, two-way voice-based telephone is invented at Bell Labs Waldo Semon at B.F. Goodrich invents plasticized PVC known as vinyl Polysulfide (Thiokol) rubber is synthesized... 

Sulfur Cements Sulfur base cements are heated in a kettle similar to asphalts and joints poured hot, done in several steps to assure the joints are filled before cement cools below flowable temperature. Sulfur cements are plasticized using 0.6% olefin polysulfide (Thiokol ). Other plasticizers have been tried but none have proven as effective as the polysulfide. Sulfur cements are filled with either silica or carbon depending on exposure (carbon in the case of hydrofluoric... 

A method, using differential scanning calorimetry, has been developed to estimate quantitatively orthorhombic and monoclinic sulfur in sulfur materials. Sulfur cooled from the melt at 120°C immediately gives monoclinic sulfur which reverts to orthorhombic sulfur within 20 hr. Limonene, myrcene, alloocimene, dicyclopentadiene, cyclododeca-1,5,9-triene, cycloocta-1,3-diene, styrene, and the polymeric polysulfides, Thiokol LP-31, -32, and -33 each react with excess sulfur at 140° C to give a mixture of poly sulfides and unreacted sulfur. In some cases substantial amounts of this unreacted sulfur may be held indefinitely in a metastable condition as monoclinic sulfur or S8 liquid. Limonene, myrcene, and dicyclopentadiene are particularly effective in retarding sulfur crystallization. 

PPG-2-buteth-3 PPG-3-buteth-S PPG-S-buteth-7 PPG-7-buteth-ia PPG-9-buteth-12 PPG-12-buteth-16 PPG-24-buteth-27 PPG-20-butett 30 PPG-28butettF3S PPG-33-buteth4S 908049-3 LP -2 LP -3 LP -32 LP -33 Polysulfide Thiokol 2P Thiokol RLP-2078 TItiokol RLP-2378 9082-00-2 Arcol 11-34 9084-064 Ciisotan R-SM Daivan 1 Daxad 11G Daxad 13 Dehscoflx 914/ASL Lomai P62 Rhodacal N... 

Thioindigo red B. See Thioindigo 2-Thio-4-ketothiazolidine. See Rhodanine Thiokol 2P, Thiokol 2135, Thiokol 2153, 2157. See Polysulfide Thiokol FES-2258. See Epoxy resin Thiokol MC-2027] Thiokol R-2100] Thiokol RLP-2078, Thiokol RLP-2378. See Polysulfide Thiolactic acid (INCI) 2-Thiolactic acid. See 2-Mercaptopropionic acid Thiolactic acid, ammonium salt. See Ammonium thiolactate Thiolane. See Tetrahydrothiophene Thiolanediol CAS 3976-75-8... 

Polysulfides. Polysulfides are also called Thiokol s (T) after the company that originally made them. They were discovered in 1927 (see PoLYSULFiDES). Thiokol elastomers have low tensile strength and tear strength properties. However, they have good resistance to both aliphatic and aromatic solvents at room temperature and at slightly elevated temperatures. It is estimated that 1.4 tol.6 kt are used annually in the United States. The primary use of polysulfide elastomers are in seals, gaskets, rolls, and diaphragms where solvent resistance and low permeability are required. 

Waldo Semon at B.F. Goodrich invents plasticized PVC known as vinyl Polysulfide (Thiokol) rubber is synthesized... 

---