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Millable polyurethanes

The millable materials have a diene group (-CH=CH-) included in the polymer to allow for cross-linking by sulfur or by peroxides. However, the capital costs to use millable polyurethanes are high because rubber mills, presses, and heavy-duty molds are needed to produce an article. [Pg.272]

Ty Ply BN. [Lmd] One-coat adhesive for bonding nitrile, polyacrylate, polyepichloixAydrin, or millable polyurethane rubber to metal or other rigid substrates during vulcanization of the elastomer. [Pg.384]

Stabilizer 2013-P . [TSE] Carbo-diimide activator for vulcanizates based on millable polyurethane. [Pg.349]

Millable polyurethane elastomers are prepared from bi-functional castor oil or its blends, with poly(propylene glycol) at two different ratios of 1 4-butane diol as a chain extender and TDI. Castor oil-based polyurethane nanoparticles with an average diameter of 300 nm are prepared by a... [Pg.164]

Examples of vulcanizable elastomers include natural rubber (NR), styrene butadiene rubber (SBR), butadiene rubber (BR), ethylene-propylene-diene monomer-rubber (EPDM), butyl rubber (HR), polychloroprene or neoprene (CR), epichlorohydrin rubber (ECO), polyacrylate rubber (ACM), millable polyurethane rubber, silicone rubber, and flu-oroelastomers. Examples of thermoplastic elastomers include thermoplastic polyurethane elastomers, styrenic thermoplastic elastomers, polyolefin-based thermoplastic elastomers, thermoplastic polyether-ester (copolyester) elastomers, and thermoplastic elastomers based on polyamides. [Pg.204]

Millable polyurethanes (U) are either ester- or ether-based. Ester-based elastomers are poor in water resistance. They have good ultimate mechanical properties and abrasion resistance. [Pg.214]

Polyester urediane rubber Polyedier urediane rubber Millable polyurethane rubber (not thermoplastic polyurethane elastomers (TPUs) AU EU... [Pg.215]

To produce the millable polyurethane elastomers, one can bring diisocyanate molecules into reaction with oligomeric hydroxyl-terminated polyesters or polyethers and lower-molecular-weight diols (e.g., 1,4-butanediol). The ester-derived elastomers are designated AU, while the ether-derived materials are designated EU. An illustrative chemical structure is given here, where toluene diisocyanate was used ... [Pg.275]

Millable polyurethane elastomers have a small but positive excess of OH groups—hence they are stable in storage. [Pg.34]

SOME COMMERCIALLY AVAILABLE MILLABLE POLYURETHANE ELASTOMERS... [Pg.201]

Properties of the millable polyurethane can be varied over a limited range by varying the proportions of curatives in Table 7.3, and these effects are shown in Fig. 7.1 and Tables 7.4 and 7.5. Cure activation or faster cures may be obtained by the use of more ZnCl2-MBTS complex (Caytur 4) over the range 0-2-0-5 phr. Also zinc diethyldithiocarbamate and zinc dibutyl-dithiocarbamate may be used over the range 01-0 4 phr. Calcium stearate acts as a co-activator with the ZnCl2-MBTS complex and improves compression set (see Table 7.5) and reduces heat build-up. The effects of... [Pg.202]

BASIC VULCANIZATION RECIPE FOR A POLYETHER MILLABLE POLYURETHANE... [Pg.202]

EFFECT OF SULPHUR CONCENTRATION ON MILLABLE POLYURETHANE ELASTOMER... [Pg.204]

Fig. 7.4. Effect of non-black fillers on properties of a millable polyurethane... Fig. 7.4. Effect of non-black fillers on properties of a millable polyurethane...
Fig. 7.5. Peroxide crosslinking mechanism of an elastomer. This mode of decomposition occurs in neutral or alkaline conditions, as normally prevails during the crosslinking of millable polyurethane rubber. If an acidic phase predominates then little or no crosslinking occurs as a different peroxide decomposition mechanism takes place. Fig. 7.5. Peroxide crosslinking mechanism of an elastomer. This mode of decomposition occurs in neutral or alkaline conditions, as normally prevails during the crosslinking of millable polyurethane rubber. If an acidic phase predominates then little or no crosslinking occurs as a different peroxide decomposition mechanism takes place.
See other pages where Millable polyurethanes is mentioned: [Pg.339]    [Pg.272]    [Pg.272]    [Pg.2]    [Pg.172]    [Pg.275]    [Pg.298]    [Pg.33]    [Pg.123]    [Pg.199]    [Pg.201]    [Pg.203]    [Pg.205]    [Pg.207]    [Pg.215]    [Pg.217]    [Pg.219]    [Pg.403]    [Pg.405]   
See also in sourсe #XX -- [ Pg.8 ]

See also in sourсe #XX -- [ Pg.149 ]

See also in sourсe #XX -- [ Pg.175 ]



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Isocyanates millable polyurethanes

Millable polyurethanes applications

Polyethers millable polyurethanes

Polyurethane elastomers millable

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