| 摘要 |
Liquidized urethane sealant composition is provided in this invention. Said urethane sealant composition is composed of 100 parts by weight of urethane prepolymer containing 1-3 % of NCO on its terminal group, 5-20 parts by weight of potential hardener such as amine imide, dicyandiamide, DBU, etc, 50-100 parts by weight of plasticizer, 30-100 parts by weight of filler such as talc, clay, PVC, etc, and 0.05-0.5 parts by weight of potential hardening accelerator such as urea, glycerol, etc. Said urethane prepolymer is composed of isocyanate and polyol whose ratio is 1.5-2:0.5-1.5.
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