Room-temperature curable elastic composition

Claim 1

An elastic composition curable at room temperature comprising (A) a diamine having a molecular weight of about 5,000 to about 25,000 and expressed by the following formula ##STR4## wherein R is a residue of a long-chain diol having a molecular weight of about 500 to about 15,000, R' is a group selected from the group consisting of alkylene, cycloalkylene and arylene, and n is an integer of 1 to 25, (B) a diepoxy compound in an amount such that the ratio of the moles of epoxy groups in the diepoxy compound to the moles of primary amino groups in the diamine (A) is from 0.5 to 5.0, (C) a mixture of (i) a diacrylic acid ester and/or a dimethacrylic acid ester and (ii) a tri- or higher-polyacrylic acid and/or a tri- or higher polymethacrylic acid ester in which 5 to 90% of the acryloyl and/or methacryloyl groups are derived from the diacrylic and/or dimethacrylic acid ester, the amount of said mixture being such that the ratio of the total moles of the acryloyl and methacryloyl groups in the mixture to the moles of primary amino groups in the diamine (A) is from 0.1 to 2.0, (D) 0 to about 300 parts by weight, per 100 parts by weight of the total of the diamine (A), diepoxy compound (B) and mixture (C), of an inorganic filler, (E) a monoepoxy compound in an amount of 0 to 25 moles per mole of the primary amino groups in the diamine (A), (F) 0 to about 30 parts by weight, per 100 parts by weight of the total of the diamine (A), diepoxy compound (B) and mixture (C), of a curing promotor, (G) 0 to about 100 parts by weight, per 100 parts by weight of the total of the diamine (A), diepoxy compound (B) and mixture (C), of a viscosity controlling agent, (H) 0 to about 300 parts by weight, per 100 parts by weight of the total of the diamine (A), diepoxy compound (B) and mixture (C), of an organic filler, (I) 0 to about 30 parts by weight, per 100 parts by weight of the total of the diamine (A), diepoxy compound (B) and mixture (C), of an age-resister. (J) 0 to about 30 parts by weight, per 100 parts by weight of the total of the diamine (A), diepoxy compound (B) and mixture (C), of a sag inhibitor, (K) 0 to about 30 parts by weight, per 100 parts by weight of the total of the diamine (A), diepoxy compound (B) and mixture (C), of an ultraviolet absorbent and (L) 0 to about 10 parts by weight, per 100 parts by weight of the total of the diamine (A), diepoxy compound (B) and mixture (C), of an assistant sag inhibitor.