Solid alkylaryl phosphite compositions and methods for manufacturing same
AssigneeChemtura Corporation
InventorsJonathan S. Hill, Maurice Power, Peter Smith
Life of this patent
Estimating the term…
Abstract
The invention is directed to various alkylaryl phosphite compositions that ideally are suitable for use as secondary antioxidants in polymers. In one aspect, the phosphite composition comprises a tris(dialkylaryl)phosphite in an amount from 20 to 93 weight percent; and at least one of: a bis(dialkylaryl)monoalkylaryl phosphite; a bis(monoalkylaryl)dialkylaryl phosphite; and a tris(monoalkylaryl)phosphite. The inventive phosphite composition is a solid at ambient conditions. The invention also relates to alkylate compositions and processes for forming such alkylate compositions and such phosphite compositions.
Claims14
A composition comprising a phosphite composition, which phosphite composition consists of:
- (a) from 25 to 80 weight percent of a tris(dialkylaryl)phosphite;
- (b) from 15 to 50 weight percent of a bis(dialkylaryl)monoalkylaryl phosphite;
- (c) from 3 to 25 weight percent of a bis(monoalkylaryl)dialkylaryl phosphite;
- (d) from 0.1 to 6 weight percent of a tris(monoalkylaryl)phosphite;
- (e) from 0 to 5 weight percent other phosphites
- wherein dialkylaryl in (a), (b), (c) and (d) is dibutylphenyl or diamylphenyl and monoalkaryl in (a), (b), (c) and (d) is butylphenyl or amylphenyl,
- weight percent is based on the total weight of all phosphites in the phosphite composition,
- and wherein the phosphite composition is a solid at ambient conditions melting in a temperature range of from greater than 30° C. to less than 170° C.
A phosphite composition prepared by reacting a phosphorus halide with an alkylated phenol composition comprising a monoalkylphenol in an amount from 2 to 45 weight percent, and
- a dialkylphenol in an amount from 55 to 98 weight percent, based on the total weight of all alkylated phenols in the alkylated phenol composition,
- wherein alkyl moieties on the monoalkylphenol and the dialkylphenol are selected from the group consisting of isomers of butyl and amyl
- and the phosphite composition which is prepared comprises:
- (a) a tris(dialkylaryl)phosphite in an amount from 20 to 93 weight percent;
- and at least one of:
- (b) a bis(dialkylaryl)monoalkylaryl phosphite;
- (c) a bis(monoalkylaryl)dialkylaryl phosphite;
- and
- (d) a tris(monoalkylaryl)phosphite,
- wherein the composition comprises components (b), (c) and (d) in combination in an amount from 7 to 80 weight percent, based on the total weight of all phosphites in the composition, which composition comprises 0 to 5 weight percent other phosphites,
- and wherein a composition consisting of (a), at least one of (b), (c) and (d) and between 0 to 5 weight percent other phosphites is a solid at ambient conditions melting in a temperature range of from greater than 30° C. to less than 170° C.
Dependencies are inferred from the claim text.