Polyurethane resin composition for optical lenses and impact strength synthetic resin lenses
AssigneeTalex Optical Co., Ltd.
InventorsKanichi Tamura, Shoichi Mitsuuchi, Chung-Tang Chang
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Abstract
An impact strength synthetic resin lens is provided in which transparency of a synthetic resin lens material of a polyurethane and releasability are improved to improve productivity and no stria are produced. The impact strength synthetic resin lens is manufactured by casting and curing a polyurethane resin composition which a polyurethane resin composition for molding optical lenses, comprising, as essential components, a prepolymer obtained by reacting an alicyclic polyisocyate having two or more isocyanate groups with a polyol having two or more hydroxy groups, an internal mold lubricant and a decolored aromatic diamine.
Claims6
A polyurethane resin composition for molding optical lenses, comprising, as essential components, a prepolymer obtained by reacting an alicyclic polyisocyate having two or more isocyanate groups with a polyol having two or more hydroxy groups, an internal mold lubricant and a decolored aromatic diamine.
A method of manufacturing impact strength synthetic resin lenses comprising the steps of preparing a prepolymer by reacting an alicyclic polyisocyate having two or more isocyanate groups with a polyol having two or more hydroxy groups, adding an internal mold lubricant to said prepolymer, blending a decolored aromatic diamine, and casting and curing the mixture.
Dependencies are inferred from the claim text.