Polyurethane composition

A polyurethane composition is produced by mixing (a) 100 parts by weight of prepolymer having terminal isocyanate groups and having a number average molecular weight in the range of from 800 to 20,000, (b) 5 - 30 parts by weight of a radical polymerizable vinyl compound, and (c) 0.05 - 1.0 part by w...

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Hauptverfasser: FUJII, YOSHIHIKO, ISEDA, YUTAKA, ODAKA, FUMIO
Format: Patent
Sprache:eng
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Zusammenfassung:A polyurethane composition is produced by mixing (a) 100 parts by weight of prepolymer having terminal isocyanate groups and having a number average molecular weight in the range of from 800 to 20,000, (b) 5 - 30 parts by weight of a radical polymerizable vinyl compound, and (c) 0.05 - 1.0 part by weight of a radical initiator, adding (d) a curative selected from the group consisting of polyamine and polyol, and curing the resulting mixture by heating at 70 - 140 DEG C, the equivalent ratio of the active hydrogen of (d) to the isocyanate groups of (a) being in the range of from 0.8 to 1.2.