RADIATOR HOSE

The main uses of EPM of EPDM are in automotive appHcations as profiles, (radiator) hoses, and seals in building and constmction as profiles, roofing foil, and seals in cable and wke as cable insulation and jacketing and in appHances as a wide variety of mostiy molded articles. 

Pilot Recipe for Automotive Radiator Hose (Steam Cure 180°C/200... 

Following this scheme, Coz and Baranwal [80] have reported the reverse engineering of four unknown cured rubber compounds, representing a radial passenger tyre tread, a radiator hose, an oil pan seal and an engine gasket. 

More than 800 million pounds of EPM and EPDM polymers were produced in the United States in 2001. Their volume ranks these materials fourth behind styrene-1,3-butadiene copolymers, poly( 1,4-butadiene), and butyl rubber as synthetic rubbers. EPM and EPDM polymers have good chemical resistance, especially toward ozone. They are very cost-effective products since physical properties are retained when blended with large amounts of fillers and oil. Applications include automobile radiator hose, weather stripping, and roofing membrane. 

Major polymer applications automotive radiator hose, garden hose, wire and cable, tires, roofing, gaskets, conveyor belts... 

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. 

Ethylene propylene rubber Automotive radiator hoses and window seals, roof covering, etc. 

Uses of Ethylene-Propylene Rubbers. EPDM and EPR vulcanizates are used in extruded profiles, cable insulation and jacketing, and roofing membranes. There are many automotive uses radiator hose, door and trunk seals, insulation, jacketing, and others. These elastomers are also used in applications such as window and architectural profiles, dock fenders, and washing-machine hoses. In short, their applications are extensive and diverse. Ethylene-propylene rubbers may be the most versatile of general-purpose rubbers. In addition, EP rubbers are added to polyolefin plastics as impact modifiers and as components of certain thermoplastic elastomer compositions (e.g., thermoplastic vulcanizates, which are discussed later in this chapter). 

Adhesion of EPDM elastomers to polar substrates, for radiator hoses and V-belts, and of general purpose rubbers to carcass in tyre sidewall compounds is also improved, as is co-vulcanization of EPDM with polar rubbers. 

Typical solid rubber parts produced are instrument seals, shoe soles and heels, auto spark-plug boots, radiator hose, boating accessories, appliance parts, O rings, and other miscellaneous components. 

Although direct analysis of rubber compounds yields simultaneously information about polymer and additives, a quantitative determination of the additives is difficult. This requires separation of these components from the polymer and fillers by means of extraction. Following the standard procedure at Akron Rubber (cfr Chp. 2.2 of ref. [3a]), Coz et al. [25] have examined four unknown cured rubber compounds (radial passenger tyre tread, radiator hose, oil pan seal and engine gasket). Tables 6.7 and 6.8 compare the reconstructed formulations and actual recipes for the tyre and radiator hose. 

In the radiator hose it was impossible to identify tetramethyl thiuram monosulfide (TMTM). This... 

Table 6.8. Comparison of reconstructed formulation with actual recipe for a radiator hose" ...

Other nontire automotive applications for HR may include radiator hoses, heater hoses, weather strips and body mounts. 

TABLE 27 EPDM formulations for tube/cover of radiator hose ... 

Table 33 Pilot recipe for automotive radiator hose (steam cure 180 °C/20 ) ...

It is explained that acrylic coagents can improve processability and vulcanisation of elastomers used in automotive applications, and that Saret coagents from Sartomer Co. of the USA provide scorch-retarding properties along with improved radiator hose properties for all curing situations. This article describes tests comparing several coagents in ethylene propylene diene monomer radiator hose formulations. Results are presented and discussed. 

Automotive under bonnet uses (radiators, hoses, electrical components, housings, etc.), external (bumpers, lights, trim, spoilers, fuel tanks, etc.) and interior fittings (dashboards, fixtures, trim, etc.). 

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