Carboxylate-containing alkyltin heat stabilizer

Details Carboxylate-containing alkyltin heat stabilizer Carboxylate-containing alkyltin heat stabilizer

2005-04-12

2005-04-12

Anthony, Joseph D. (Department: 1714)

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

C252S182150, C252S182170, C252S182300, C252S182330, C524S180000, C524S181000, C524S144000, C524S567000

Reexamination Certificate

active

06878310

ABSTRACT:
A stabilizer composition, suitable for use in polyvinyl chloride compositions, can be formed by reacting a mixture of monoalkyltin trichloride, such as butyltin trichloride, and dialkyltin dichloride, such as dibutyltin dichloride, with at least one carboxylic acid, such as 2-ethylhexanoic acid, and 2-mercaptoethanol, in the presence of base, followed by reaction of the resulting product with a sulfide reagent, such as sodium sulfide. The final composition comprises a complex mixture of alkyl tin carboxylates and/or mercaptides, and of monoalkyltin sulfides and dialkyltin sulfides.

REFERENCES:
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patent: 3565931 (1971-02-01), Brecker
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patent: 4255320 (1981-03-01), Brecker et al.
patent: 4312769 (1982-01-01), Pratt
patent: 4552907 (1985-11-01), Sato et al.
patent: 5527842 (1996-06-01), Hoch
patent: 1004625 (2000-05-01), None
patent: 1297931 (1972-11-01), None

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