Polysulfides, block copolymers

Phenolic Resins. At elevated temperatures, phenoHc resins are cured with polysulfide resins through a condensation reaction. The product may be considered a block copolymer of the rigid phenoHc resin and the flexible polysulfide. Thus, the polysulfide acts to flexibiHze the resulting polymer. [Pg.456]

Sealants - [ELASTOMERSSYNTHETIC - POLYISOPRENE] (Vol 9) - [SEALANTS] (Vol 21) -acrylics [ACRYLICESTERPOLYMERS - SURVEY] (Voll) -barium compds in [BARIUM COMPOUNDS] (Vol 3) -based on liquid polysulfides [POLYMERS CONTAINING SULFUR - POLYSULFIDES] (Vol 19) -defoamersin [DEFOAMERS] (Vol 7) -fiom fluorosilicones [FLUORINE COMPOUNDS,ORGANIC - POLY(FLUOROSILICONES)] (Volll) -hydrocarbon resins in [HYDROCARBON RESINS] (Vol 13) -lecithin in (LECITHIN] (Vol 15) -organolithiumcmpdsinprdnof [LITHIUM AND LITHIUM COMPOUNDS] (Vol 15) -polysulfide curing [PEROXIDES AND PEROXIDE COMPOUNDS - INORGANIC PEROXIDES] (Vol 18) -propylene oxide in mfg of [PROPYLENE OXIDE] (Vol 20) -PVB m [VINYL POLYMERS - VINYL ACETAL POLYMERS] (Vol 24) -rheological measurements [RHEOLOGICAL MEASUREMENTS] (Vol 21) -from styrenic block copolymers [ELASTOMERS SYNTHETIC - THERMOPLASTIC ELASTOMERS] (Vol 9) -use of dispersants [DISPERSANTS] (Vol 8)... [Pg.874]

A triblock copolymer consisting of one central perfluorinated block and terminal polysulfide blocks was synthesized by the procedure shown in Fig. 35. [Pg.603]

No branching or cross-linking occurs during the condensation with difunctional halides. The additiik of a polyfunctional halide such as 1,2,3-trichloropropane is used to produce a network structure, when desired, in the polysulfide polymers. Copolymers are readily prepared by using a mixture of halides in the initial reaction. It has been recently found that redistribution between disulfide groups occurs readily in the presence of sodium polysulfide. This mechanism is similar in results to ester interchange. A copolymer will, therefore, be a random copol rmer rather than a block copolymer. [Pg.988]

B. F. Goodrich, 2) Pro Seal 890 (a polysulfide) from Essex Chemical Corporation, 3) SARAN (polyviny1idene chloride) from Dow Chemical Company, and 4) KRATON (a styrenebutadience block copolymer) from Shell Chemical Company. [Pg.116]

Uses Plasticizer/stabilizer for epoxy, PVC, paints plasticizer/synergist for PVC heat stabilizers plasticizer in food-contact polymers coupling agent for S/B block copolymers pigment dispersant in PVC-P in closure-sealing gaskets for food containers in food-contact polysulfide polymer/polyepoxy resins... [Pg.1101]

Liquid polysulfide polymers readily react with epoxy resins under basic conditions to form a block copolymer ... [Pg.462]

The polysulfide-epoxy block copolymer has significandy higher impact resistance and more flexibility than epoxy [30,31]. [Pg.462]

Some specific recent applications of the GC-MS technique to various types of polymers include the following PE [49,50], poly(l-octene) [51], poly(l-decene) [51], poly(l-dodecene) [51], 1-octene-l-decene-l-dodecene terpolymer [51], chlorinated polyethylene [52], polyolefins [53, 54], acrylic acid methacrylic acid copolymers [55], polyacrylates [56], styrene-butadiene and other rubbers [57-59], nitrile rubber [60], natural rubbers [61, 62], chlorinated natural rubber [63, 64], polychloroprene [65], PVC [66-68], silicones [69, 70], polycarbonates [71], styrene-isoprene copolymers [72], substituted PS [73], polypropylene carbonate [74], ethylene-vinyl acetate copolymers [75], Nylon [76], polyisopropenyl cyclohexane a-methyl styrene copolymers [77], m-cresol-novolac epoxy resins [78], polymeric flame retardants [79], poly(4-N-alkyl styrenes) [80], polyvinyl pyrrolidone [81], vinyl pyrrolidone-methyl acryloxysilicone copolymers [82], polybutylcyanoacrylate [83], polysulfide copolymers [84], poly(diethyl-2-methacryloxy)ethyl phosphate [85], ethane-carbon monoxide copolymers [86], polyetherimide [87], bisphenol A [88], ethyl styrene [89], styrene-isoprene block copolymer [89], polyvinyl alcohol-co-vinyl acetate [90], epoxide thiol [91], maleic acid-propylene copolymer [92], P-hydroxy butyrate-P-hydroxy valerate copolymer [93], polycaprolactams [39,94], PS [95,96], polypyrrole [95,96], polyhydroxy alkanoates [97], poly(p-chloromethyl) styrene [81], polybenzooxazines and siloxy substituted polyoxadisila-pentanylenes [98,99] poly benzyl methacrylates [100], polyolefin blends after ageing in soil [101] and polystyrene peroxide [43]. [Pg.150]

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