| abstract |
Provided is a room temperature curable organopolysiloxane composition in which the degree of curing can be visually recognized by a change in color, a structure thereof, and a method for discriminating the cured state. A room temperature curable organopolysiloxane composition containing the following components, which changes color from an uncured state to the progress of curing. (A) Organopolysiloxane represented by the following formulas (1) and / or (2): 100 parts by mass (In the formula, R is an unsubstituted or halogen atom-substituted monovalent hydrocarbon group having 1 to 10 carbon atoms, and n is an integer of 10 or more). (In the formula, R and n are as described above, X is an oxygen atom or an alkylene group having 2 to 5 carbon atoms, and m is 0 or 1 independently). (B) Organosilicon compounds having at least three silicon atom-bonded hydrolyzable groups in one molecule and / or partially hydrolyzed condensates thereof other than the components (A), (C) and (D): 0.1 ~ 50 parts by mass (C) Curing catalyst: 0.01 to 20 parts by mass (D) Silane coupling agent: 0.1 to 10 parts by mass (E) pH indicator: 0.01 to 10 parts by mass |