Polyethylene compatible sulphonic acids as silane...

C - Chemistry – Metallurgy – 08 – K

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C08K 5/42 (2006.01)

Patent

CA 2179506

A crosslinkable polymer composition contains a crosslinkable polymer with hydrolysable silane groups and at least one silanol condensation catalyst. The polymer composition is distinguished by the silanol condensation catalyst being a compound of the formula ArSO3H (I) or a precursor thereof, Ar being a substituted benzene or naphthalene ring, the substituent or substituents containing 4-20 carbon atoms, preferably 10-18 carbon atoms. The precursor may be an anhydride of the sulphonic acid of formula (I), or a sulphonic acid of formula (I) provided with a hydrolysable protective group, e.g. an acetyl group. Specific examples of compounds of formula (I) are dodecyl benzene sulphonic acid and tetrapropyl benzene sulphonic acid.

Une composition polymère réticulable contient un polymère réticulable comportant des groupes silane hydrolysables avec au moins un catalyseur de condensation, le silanol. Cette composition polymère se caractérise en ce que le catalyseur de condensation, le silanol, est un composé de la formule (I): ArSO3H ou un de ses précurseurs, Ar désignant un cycle benzène ou naphatalène substitué, le ou les substituant(s) comportant entre 4 et 20 atomes de carbone, de préférence entre 10 et 18. Le précurseur peut être un anhydride de l'acide sulfonique de formule (I) ou un acide sulfonique de formule (I) comprenant un groupe protecteur hydrolysable, tel qu'un groupe acétyle. L'acide sulfonique de dodécylbenzène et l'acide sulfonique de tétrapropylbenzène constituent des exemples spécifiques de composés de la formule (I).

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