STABILIZING SILANE GROUP-CONTAINING CROSS-LINKED POLYMERS Russian patent published in 2007 - IPC C08K5/13 C08K5/372 C08K5/42 C08J3/24 C08L83/00 

FIELD: organic chemistry, polymers, chemical technology.

SUBSTANCE: invention relates to a composition used for cross-linking and stabilizing a polymer containing hydrolysable silane groups wherein this composition comprises sulfonic acid as a catalyst for condensation of silanols. Invention describes using the composition comprising sulfonic acid as a catalyst for condensation of silanols wherein sulfonic acid represents a compound of the formula (III): ArSO₃H (III) or its precursor wherein Ar means hydrocarbyl-substituted aryl group, and compound comprises in total from 14 to 28 carbon atoms and wherein a compound used as a stabilizing agent represents neutral or acidic compound, it doesn't comprise ester groups and represents compound described by the formula (I):

wherein R means unsubstituted or substituted aliphatic or aromatic hydrocarbyl radical that can comprise heteroatoms; R' means hydrocarbyl radical; R'' means hydrocarbyl radical, and R' and/or R'' mean a bulky radical; X₁, X₂ and X₃ are similar or different and represent hydrogen atom (H) of hydroxyl group (-OH) wherein at least X₁, X₂ or X₃ mean -OH; n is in the range from 1 to 4. The composition is used for cross-linking and stabilizing a polymer comprising hydrolysable silane groups. Invention provides enhancing resistance of polymer against aging, absence of mercaptan or other odor and formation of cracks in material.

EFFECT: valuable properties of composition.

24 cl, 4 tbl