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Rubber, bromobutyl

This composition processed at 38°C (film forming temperature) was suitable for the controlled release of salbutamol. [Pg.277]

This composition, after spraying and drying at ambient temperature, [Pg.277]

Poly(ethylene vinyl alcohol) and cellulose acetate are used in tire imierliner. High molecular weight polyisobutylene plasticizer (molecular weight 2,300 daltons) is used in pressure sensitive tape for roofing applications.  [Pg.277]

Bromobutyl rabber is relatively impermeable to air and moisture and it is often a major portion of the tire innerliner composition. The addition of the starch/plasticizer dispersion composite further reduces the already low air permeability of the butyl rubber-based com-positioa Starches with high softening points are difficult to incorporate it into rabber composition without plasticizer.  [Pg.277]

In pressure sensitive roofing tape, the plasticizer imparts a resiliency and gives a permanent tack. It is essential to select an appropriate concentration of plasticizer in relation to the type and concentration of the tackilying resin. [Pg.278]

2 TYPICAL FORMULATIONS Tire curing bladder lubricant  [Pg.126]


Bromobutyl Rubber Compounding and Applications, Exxon Chemical Co. [Pg.262]

In a particular application involving a typical O type mount, the nitrile rubber (NR) compound causes a resonance frequency of 28 Hz, whereas resonance was previously tolerable only well below 20 Hz. In this case, a blend of NR and bromobutyl rubber is more suitable. A comparison is shown in Table 3. [Pg.652]

Figure 5 Dependence of particle size of dispersed bromobutyl rubber on the DMAE concentration. Source Ref. 53. Figure 5 Dependence of particle size of dispersed bromobutyl rubber on the DMAE concentration. Source Ref. 53.
Pre-cured bromobutyl material is a procured vulcanized bromobutyl rubber suitable for site lining and delivered with suitable adhesive system based on chlorobutyl, chloroprene and polyisocyanate. [Pg.57]

The Payne effect of carbon black reinforced rubbers has also been investigated intensively by a number of different researchers [36-39]. In most cases, standard diene rubbers widely used in the tire industry, bke SBR, NR, and BR, have been appbed, but also carbon black filled bromobutyl rubbers [40-42] or functional rubbers containing tin end-modified polymers [43] were used. The Payne effect was described in the framework of various experimental procedures, including pre-conditioning-, recovery- and dynamic stress-softening studies [44]. The typically almost reversible, non-linear response found for carbon black composites has also been observed for silica filled rubbers [44-46]. [Pg.5]

Some preservatives are especially reactive with rubber. Bromobutyl rubbers, but not chlorobutyls, are recommended for drug formulations that contain chlorobutanol. A pH that is either very low or very high affects rubber formulations more than a pH in the range of 5-8. Buffer systems may also affect the choice of rubber formulations. Materials such as phosphates not only attack the rubber at high pHs but also may attack glass as well. [Pg.1475]

Finally, materials commonly employed in the construction of respirators would include natural rubber, butyl rubber, chlorobutyl rubber, bromobutyl rubber, neoprene, and silicone. [Pg.572]

The choice of elastomer has the greatest effect on a formulation. The most common elastomers that can be used for closures for injectable products are given in Table 12.5. Of these elastomers, natural rubber, synthetic polyisoprene, butyl, chlorobutyl and bromobutyl rubber are typically used for the manufacture of rubber closures and stoppers used in the packaging and administration of parenterals. [Pg.350]

Grafting from, exploits the active sites, which exist or can easily be generated on a polymer. Halogenated polymers are most frequently used for this purpose poly(vinyl) chloride), polychloroprene, chlorinated EPDM, chlorobutyl rubber, bromobutyl rubber, chlorinated polybutadiene, chlorinated butadiene-styrene copolymers etc.145). [Pg.287]

Isobutylene and isoprene are in a ratio of approximately 50 1. Chlorobutyl rubber and bromobutyl rubber are produced by the halogenation of butyl rubber. Butyl rubber and halobutyl rubber are highly impermeable to air and show very low water absorption, and good heat, oxygen and ozone resistance. As noted earlier, they therefore find extensive use in liners of radial tires, covers and insulation of high-voltage electric cables, and automobile engine and radiator hoses. [Pg.431]

Novel process on the base of compact tubular reactors is principally fitted for production of bromobutyl rubber and also others chlorinated elastomers. Process is accepted at OAO "Nizhne-kamskneftekhim". In 2001-2002 pilot plant worked at which chlorobutyl rubber of required quality was received without any problems. Technical schedule was made. At present experimental-industrial plant is projected. [Pg.148]

A.M. Maysa, Radiation vulcanization of thermoplastic low-density polyethylene/bromobutyl rubber blends. J. Thermoplast. Compos. Mater. 27, 364—378 (2014)... [Pg.153]

Bromobutyl rubber. See Isobutylene/isoprene copolymer, brominated... [Pg.561]

Synonyms BIIR Brominated butyl rubber Brominated isobutylene/isoprene copolymer Bromobutyl rubber 1,3-Butadiene, 2-methyl-, polymer with 2-methyl-1-propene, brominated Butyl rubber, brominated Isobutylene, isoprene polymer, brominated Definition Elastomer vulcanized by sulfur systems vulcanizate offers low gas permeability, good weather/ozone resist., better chem./heat resist, than butyl rubber... [Pg.2205]

As seen from the results obtained (Table 3.3), the proposed method may also be used for bromobutyl rubber preparation. Moreover, other elastomers including copolymers of ethylene and propylene were halogenated in a turbulent mode. [Pg.136]

Accelerated-sulfur vulcanization is the most widely used method. For many applications, it is the only rapid crossUnking technique that can, in a practical manner, give the delayed action required for processing, shaping, and forming before the formation of the intractable vulcanized network. It is used to vulcanize natural rubber (NR), synthetic isoprene rubber (IR), styrene-butadiene rubber (SBR), nitrile rubber (NBR), butyl rubber (HR), chlorobutyl rubber (ClIR), bromobutyl rubber (BUR), and ethylene-propylene-diene-monomer rubber (EPDM). The reactive moiety for all of these elastomers can be represented by... [Pg.333]


See other pages where Rubber, bromobutyl is mentioned: [Pg.131]    [Pg.651]    [Pg.652]    [Pg.671]    [Pg.481]    [Pg.13]    [Pg.82]    [Pg.211]    [Pg.665]    [Pg.275]    [Pg.131]    [Pg.110]    [Pg.169]    [Pg.20]    [Pg.48]    [Pg.64]    [Pg.65]    [Pg.197]    [Pg.112]    [Pg.401]    [Pg.1390]    [Pg.211]    [Pg.348]    [Pg.584]    [Pg.134]    [Pg.277]    [Pg.277]    [Pg.551]    [Pg.571]   
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