POLYURETHANE/THIOURETHANE-BASED OPTICAL RESIN AND PROCESS FOR PRODUCING THE SAME

Provided is a process which can be carried out upon the production of a polyurethane/thiourethane-based resin with the use of a polyisocyanate compound, a polyol compound, and a polythiol compound, without causing abrupt heat generation or viscosity increase. At least one polyol compound having at l...

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Bibliographische Detailangaben
Hauptverfasser: OKUMURA, KUNIO, KOHGO, OSAMU, TANAKA, MAMORU, MOHRI, JUNICHI, RYU, AKINORI
Format: Patent
Sprache:eng ; fre ; ger
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Zusammenfassung:Provided is a process which can be carried out upon the production of a polyurethane/thiourethane-based resin with the use of a polyisocyanate compound, a polyol compound, and a polythiol compound, without causing abrupt heat generation or viscosity increase. At least one polyol compound having at least one ether bond and two or more hydroxy groups in a molecule is used as the polyol compound, whereby a large heat generation or an abrupt viscosity increase are prevented from occurring upon blending monomer.