Chloro butyl rubber

CIIR chloro-isobutene-isoprene rubber (chlorinated butyl rubber)... [Pg.947]

The copolymer of isobutylene with a few percent isoprenc (butyl rubber) can be cured to produce an ozone-resistant elastomer with low permeability to oxygen and nitrogen. Butyl rubber has a Tt of — 70 C a refractive index of 1.5081, and a coefficient of linear expansion of 5.7 X 10 cm/cxn C. Chloro and bromo butyl rubber are more resistant to the permeation of oxygen and nitrogen than butyl rubber. [Pg.140]

FIG. 18.3 Activation energy of diffusion as a function of Tg for 21 different polymers from low to high temperatures, ( ) odd numbers (O) even numbers 1. Silicone rubber 2. Butadiene rubber 3. Hydropol (hydrogenated polybutadiene = amorphous polyethylene) 4. Styrene/butadiene rubber 5. Natural rubber 6. Butadiene/acrylonitrile rubber (80/20) 7. Butyl rubber 8. Ethylene/propylene rubber 9. Chloro-prene rubber (neoprene) 10. Poly(oxy methylene) 11. Butadiene/acrylonitrile rubber (60/40) 12. Polypropylene 13. Methyl rubber 14. Poly(viny[ acetate) 15. Nylon-11 16. Poly(ethyl methacrylate) 17. Polyethylene terephthalate) 18. Poly(vinyl chloride) 19. Polystyrene 20. Poly (bisphenol A carbonate) 21. Poly(2,6 dimethyl-p.phenylene oxide). [Pg.669]

Butyl rubber is one of the older synthetic rubbers, having been developed in 1937. Because of the saturated nature of a polyolefin elastomer, the commercial polymer is actually a copolymer of isobutylene and isoprene. The isoprene is added to provide cure sites. In addition, halogenated (bromo or chloro) derivatives are available. [Pg.707]

Halogenation of saturated hydrocarbon polymers can hardly be controlled and is frequently assodated with chain degradation phenomena In contrast, the presence of randomly distributed olefinic unsaturations, allows selective halogenation reactions by adopting appropriate conditions. For instance, butyl rubber can be chiorinated or brominated in allylic positions and chloro-butyl or bromo-butyl rubber results The latter polymers are very interesting since they exhibit fast curing rates when sulfur and ZnO are introduced in the formulations. [Pg.59]

Property Natural Rubber Butyl Rubber EPDM rubber Chloroprene rubber Nitrile rubber Silicone rubber Chloro sulfon ated polyethylene rubber... [Pg.142]

Polyisobutylene (Butyl Rubber, Copolymer with 0.5-2% Isoprene) (HR) Chloro-Sulfonated Polyethylene (CSM) Ethylene-Propylene Random Copolymer, 50% Ethylene (EPM) Ethylene-Propylene Random Terpolymer 50% Ethylene (EPDM) Poly(Ethyl Acrylate), Usually a Copolymer (ACM) Vinylidene-Fluoride-Chlorotrifluoro Ethylene Random Copolymer (FKM) Vinylidene— Fluoride— Hexafluoropropylene Random Copolymer (FKM)... [Pg.863]

In bromobutyl/chlorobutyl rubber blends, both elastomers have the polyisobutylene backbone and halogen reactive functionality. These polymers, being molecularly miscible, constitute an ideal system for co-vulcanization. Bromobutyl and chloro-butyl can be used interchangeably without significant effect on state of cure as measured by extension modulus, tensile strength, and cure rheometer torque development. Bromobutyl will increase the cure rate of a blend with chlorobutyl. However, where bromobutyl is the major part of the blends, chlorobutyl does not reduce scorch tendencies because the more reactive halogen unit can dominate. [Pg.186]

Acrylate styrene acrylonitrile Acrylate modified styrene acrylonitrile Acrylic acid ester rubber Acrylonitrile butadiene rubber or nitrile butadiene rubber Acrylonitrile butadiene styrene Acrylonitrile styrene/chlorinated polyethylene Acrylonitrile methyl methacrylate Acrylonitrile styrene/EPR rubber or, acrylonitrile ethylene propylene styrene Alpha methyl styrene Atactic polypropylene Butadiene rubber or, cis-1,4-polybutadiene rubber or, polybutadiene rubber Butadiene styrene block copolymer Butyl rubber Bulk molding compound Casein formaldehyde Cellulose acetate Cellulose acetate butyrate Cellulose acetate propionate Cellulose nitrate Chlorinated polyethylene Chlorinated polyvinyl chloride Chloro-polyethylene or, chlorinated polyethylene. [Pg.135]

Most butyl rubber is used in the tire industry. Isobutylene-based rubbers are used in underhood hose for the polymer s low permeability and temperature resistance, and high damping, resihent butyl rubbers are used for noise and vibration attenuation applications such as automotive mounts for the engine and vehicle. Chloro- and brominated butyl rubber formulations are used in automotive hose applications where contact with fuel or air conditioning fluids occurs. [Pg.72]

With chloro- and bromobutyl rubbers, regular butyl rubber is considered a raw material that is being halogenated with either chlorine or bromine from the following sources, see Figure 4.7. [Pg.71]

PB PBI PBMA PBO PBT(H) PBTP PC PCHMA PCTFE PDAP PDMS PE PEHD PELD PEMD PEC PEEK PEG PEI PEK PEN PEO PES PET PF PI PIB PMA PMMA PMI PMP POB POM PP PPE PPP PPPE PPQ PPS PPSU PS PSU PTFE PTMT PU PUR Poly(n.butylene) Poly(benzimidazole) Poly(n.butyl methacrylate) Poly(benzoxazole) Poly(benzthiazole) Poly(butylene glycol terephthalate) Polycarbonate Poly(cyclohexyl methacrylate) Poly(chloro-trifluoro ethylene) Poly(diallyl phthalate) Poly(dimethyl siloxane) Polyethylene High density polyethylene Low density polyethylene Medium density polyethylene Chlorinated polyethylene Poly-ether-ether ketone poly(ethylene glycol) Poly-ether-imide Poly-ether ketone Poly(ethylene-2,6-naphthalene dicarboxylate) Poly(ethylene oxide) Poly-ether sulfone Poly(ethylene terephthalate) Phenol formaldehyde resin Polyimide Polyisobutylene Poly(methyl acrylate) Poly(methyl methacrylate) Poly(methacryl imide) Poly(methylpentene) Poly(hydroxy-benzoate) Polyoxymethylene = polyacetal = polyformaldehyde Polypropylene Poly (2,6-dimethyl-l,4-phenylene ether) = Poly(phenylene oxide) Polyp araphenylene Poly(2,6-diphenyl-l,4-phenylene ether) Poly(phenyl quinoxaline) Polyphenylene sulfide, polysulfide Polyphenylene sulfone Polystyrene Polysulfone Poly(tetrafluoroethylene) Poly(tetramethylene terephthalate) Polyurethane Polyurethane rubber... [Pg.939]

Reactivity with Tetrazoles. Reactive tetrazoles were used for the synthesis of rubbers having an appreciable ageing protection [237]. 2-(Subst.)phenyl -5-(3,5-di-tert-butyl-4-hydroxyphenyl)tetrazole (181) can be compounded without thermolysis with BR or IR. At vulcanization temperatures, 181 is thermolysed and reactive nitrileimine 182 undergoes 1,3-dipolar addition to C = C double bonds. 183 is formed with yields from 70 to 85%, depending on the character of R in 181 (the activity series R = CH3 < H < Cl). Mechanistic model experiments were performed with 181 (R = Cl) and styrene, the latter was isued as a model instead of IR [237]. l-(3-Chloro-phenyl) -3-(3,5-di-/ert-butyl-4-hydroxyphenyl)-5-phenyl-2-pyridazoline was isolated in 44% yield and medhanism of the attachement of 183 to IR was thus confirmed. [Pg.120]