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Tetrabasic lead fumarate

IR and NMR spectra of basic lead carboxylates used as heat stabilisers for halogenated polymers, e.g. PVC, indicated that these salts were not complexes, or double compounds of lead oxide, as suggested in most textbooks, but unique compounds of interesting structure. Stabilisers studied included monobasic lead phthalate, tribasic lead maleate, tetrabasic lead fumarate, dibasic lead phthalate and dibasic lead stearate. Lead stabilisers probably functioned in these polymers by converting hydrogen chloride to water, interfering with acid catalysis of the elimination reaction. 6 refs. [Pg.141]

Lead (II) fluoride. See Lead fluoride Lead fumarate tetrabasic Synonyms Tetrabasic lead fumarate... [Pg.2375]

Tetraazatricyclo [3,3,1,1] decane. See Hexamethylenetetramine Tetrabasic lead fumarate. See Lead fumarate tetrabasic... [Pg.4342]

Tetrabasic lead fumarate n. 4PbO PbC2H2 (C00)2 2H20. a creamy-white powder used as a heat stabilizer for electrical-grade plastisols, and insulation. It is also used as a curing agent for chlorosulfonated polyethylene. [Pg.962]

Lecsoy. See Lecithin Lectro 78. See Lead fumarate tetrabasic Ledergrund F. See Polyacrylic acid LEG 325. See Magnesium laureth sulfate Leinoleic acid. See Linoleic acid Lekso/ AL Leksol . See n-Propyl bromide Lemon balm. See Balm mint (Melissa officinalis) Balm mint (Melissa officinalis) oil Lemon balm extract. See Balm mint (Melissa officinalis) extract... [Pg.2388]

Benzothiazyl-N-morpholine disulfide vulcanizing agent, chlorosulfonated PE Lead fumarate tetrabasic Lead maleate, tri basic... [Pg.5857]

If the tmns isomer of maleic acid, fumaric acid, is used instead, the resultant product has been characterized most often as tetrabasic, but sometimes as polybasic, lead fumarate. It is probably a mixture of C2H2[C(0H)(0—Pb—OH)2]2 and C2H2[C(0—Pb—0H)2]4, although intermediate products are possible. As with tetrabasic lead sulfate, this stabilizer is off-white or cream-colored and is UV light-sensitive, again yielding black colloidal PbO. Its major use is in low-smoke flame-retardant PVC compounds, where the long failure time provided helps to compensate for instability caused by other additives, particularly zinc compounds and brominated... [Pg.90]

See other pages where Tetrabasic lead fumarate is mentioned: [Pg.333]    [Pg.334]    [Pg.91]    [Pg.52]    [Pg.333]    [Pg.334]    [Pg.91]    [Pg.52]    [Pg.131]    [Pg.5047]    [Pg.5047]    [Pg.5737]    [Pg.5738]    [Pg.5857]    [Pg.165]   
See also in sourсe #XX -- [ Pg.333 ]



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LEAD FUMARATE

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