PURPOSE: To provide a fire-proofing joint structure having excellent water- tightness and air-tightness and containing a polyalkylene ether polymer containing silicone functional group, a microcapsule, a polyhydric alcohol, a compound having amino group and a specific catalyst at specific ratios.
CONSTITUTION: The objective composition contains (A) 100 pts.wt. of a polyalkylene ether polymer having a hydrolyzable silicone functional group of formula (R1 is 1-12C alkyl or phenyl; X is halide, halogen, alkoxy, acyloxy, ketoximate, alkenyloxy, amido, acid amido, isopropenoxy, oxime, aminoxy or mercapto; (a) is 0, 1 or 2; R2 is H or 1-20C univalent organic group; R3 is 1-20C bivalent organic group; (b) is 0 or 1) on the molecular chain terminal, (B) 20-150 pts.wt. of microcapsules composed of a powdery ammonium polyphosphate coated with a resin, (C) 15-75 pts.wt. of a polyhydric alcohol, (D) 5-50 pts.wt. of a compound containing amino group and generating an N- containing gas by heating and (E) 0.1-10 pts.wt. of a silanol compound condensation catalyst.
YASUDA TETSUO
IIZUKA HIROSHI
MITSUI KINZOKU TORYO KAGAKU KK