LEAD MALEATE

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]

Tribasic Lead Maleate A salt of maleic acid, highly effective as heat stabilizer for polymeric materials. Limited to use in applications where toxicity and lack of clarity can be tolerated. [Pg.213]

Butanedioic acid, hydroxy-, bis(2-ethylhexyl) ester. See Dioctyl malate Butanedioic acid, hydroxy-, lead (2+) salt (1 1). See Lead maleate, tribasic Butanedioic acid, methylene-, polymer with ethenyl acetate and 1-ethenyl-2-pyrrolidinone. See PVP/VA/itaconic acid copolymer Butanedioic acid, mono [3,4-dihydro-2,5,7,8-... [Pg.581]

Tri-Mai. See Lead maleate, tribasic Trimanganese tetraoxide Trimanganese tetroxide. See Manganese tetroxide TrimChoice 5. See Hydrolyzed oat flour Trimellic acid anhydride Trimellic acid-1,2-anhydride. See Trimellitic anhydride Trimellitate tris (2-ethylhexyl) ester. See Tri-2-... [Pg.4545]

Lead maleate, tribasic stabilizer, high-temp, service materials Yttrium oxide... [Pg.5739]

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

Dimethyl dicarbonate N-Hydroxysuccinic acid C4H6O6 Pb Lead maleate, tribasic C4H6O6 D-Tartaric acid DL-Tartaric acid L-Tartaric acid C4H7AIN4O5 Aldioxa C4H7AIO5... [Pg.7032]

Low-density polyethylene, 5-120 parts LDPE, was blended with chlorosulfonated polyethylene, 100 parts CSR, with or without curing agent (tribasic lead maleate). The blends found were used as smooth, non-tacky, tough films or coatings for natural or synthetic rubbers ... [Pg.1691]

Lead stabilizer Any of a large family of highly effective heat stabilizers that are limited to use in apphcations where toxicity, sulfur staining, and lack of clarity are not objectionable. Examples are basic lead carbonate, basic lead sulfate complexes, basic silicate, or white lead, co-precipitated lead silicate, and silica gel, dibasic lead maleate. [Pg.569]

Tribasic lead maleate n. A yellowish-white crystalline powder, an effective heat... [Pg.997]

Salts of dienophilic acids, capable of reacting with polyene stmc-tures according to a Diels-Alder reaction, are used to obtain colorless objects based on polyvinyl chloride and vinyl chloride copolymers. Basic lead maleate, as well as alkaline earth metal salts of o -furylacrylic and sorbic acids have been proposed to guarantee good color of polyvinyl chloride objects [199]. [Pg.201]

In this rubber, the curing system involves magnesia, litharge, or both, or an epoxy resin. Another alternative cure system is tri-basic lead maleate with wood rosin (organic cure). [Pg.116]

Hypalon caulks are produced primarily as gun-grade compositions, packed in cartridges or in bulk. A typical formulation is shown in Table 11. The cure system comprises tribasic lead maleate (metal oxide source and acid acceptor) and rubber chemical accelerators MBTS and Thiuram M. [Pg.620]

Tribasic lead maleate Hydrogenated rosin 2-Mercaptobenzothiazole Tetramethyl thiuram disulfide Xylol... [Pg.620]

Organic lead salts such as tribasic lead maleate or dibasic lead phthalate are effective acid acceptors for both black and light-colored stocks and provide better water resistance than the epoxy/MgO combination. Colored compounds have fairly stable weather resistance but white compounds turn gray on exposure to sunhght. [Pg.319]

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