| 摘要 |
PROBLEM TO BE SOLVED: To obtain a modified silicone sealant compsn. which is prevented from joint seal splitting, has an improved capability of following the expansion and contraction of a joint, and can form a joint seal with good appearance by incorporating a specified amt. of calcium carbonate whiskers into the same. SOLUTION: This compsn. contains 1-30wt.% calcium carbonate whiskers, pref. having a length of 2-30μm and an aspect ratio of 4 or higher. When a modified silicone sealant widely used now for sealing the joints of buildings is used for sealing the joints between siding boards, the large size of the board causes a gap between the board and the sealant due to the shrinkage of the board, causing joint seal splitting. This compsn., contg. the whiskers, can form a joint seal which is prevented from splitting, has an improved capability of following the movement (expansion and contraction) of joints, and has a good appearance.
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