A two-component curing adhesive using a curing reaction between a polyisocyanate composition (X) and a polyol composition (Y), wherein the polyisocyanate composition (X) includes a polyisocyanate (A), the polyol composition (Y) includes a polyol (B), and the polyisocyanate composition. (X) and the polyol composition (Y) each have an elongational viscosity of 0.1 to 10 Pa.Math.s.

[Object]

Provided are a plastic lens and spectacles having a high HEV cut rate represented as 100−(average transmittance in a wavelength range of not less than 400 nm and not greater than 420 nm).

[Solution]

A plastic lens according to the present invention includes a plastic lens base material obtained as a result of curing of a polymerizable compound having mixed therein a benzotriazole compound represented by general formula (1) below. Spectacles according to the present invention is produced by using the above-described plastic lens as a plastic spectacle lens.

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A polymerizable composition for an optical material containing two or more different monomers for an optical material, and a polymerization catalyst, in which at least one of the two or more different monomers for an optical material is an isocyanate compound containing an aromatic ring, a content of the polymerization catalyst with respect to a total of 100 parts by mass of the two or more different monomers for an optical material is from 0.010 parts by mass to 0.50 parts by mass, and the viscosity measured by a B-type viscometer at 25° C. and 60 rpm is from 10 mPa.Math.s to 1,000 mPa.Math.s.

A catalyst for the synthesis of oxazolidinones, preferable polyoxazolidinones, comprising an N-heterocyclic carbene and a Lewis acid (L). The invention is also related to a process for the production of an oxazolidinone compound, preferably a polyoxazolidinone compound, by reacting an isocyanate compound, preferably a polyisocyanate compound with an epoxide compound, preferably a polyepoxide compound, in the presence of the N-heterocyclic carbene and a Lewis acid catalyst and also to the resulting polyoxazolidinone.

The invention relates to a urethane adhesive composition having high modulus and is pump transferable at room temperature.

An isocyanate polymerization catalyst, a preparation method thereof and a method for preparing polyisocyanates comprising isocyanurate groups by using the same. The catalyst is a carboxylic acid salt containing a di-quaternary ammonium ion. The structure of the catalyst contains hydroxyl-containing aromatic heterocyclic residues. The catalyst is highly active. Only a small quantity of the catalyst is required for the polymerization of isocyanates. The prepared polyisocyanates have color values lower than 25 Hazen, monomer contents of less than 0.5% by weight, high contents of isocyanurates and low viscosities.

The present technology provides a polyurethane composition including: a main agent; and a curing agent, wherein the main agent includes a urethane prepolymer having an isocyanate group, a morpholine compound having one morpholine ring, and an ether compound having two dimethylamino groups, and the curing agent includes an active hydrogen compound having two or more active hydrogen-containing groups in one molecule.

The present technology provides a one-part moisture-curable polyurethane composition excellent in long-term adhesion against weather resistance and vibration. According to the embodiment of the present technology, a one-part moisture-curable polyurethane composition includes: a urethane prepolymer having an isocyanate group; a morpholine compound having one morpholine ring; and an ether compound having two dimethylamino groups.

Reprocessable crosslinked polyurethane networks, methods for making the reprocessable polyurethane networks, and methods for depolymerizing the crosslinked polyurethane networks and recovering the depolymerized monomers are provided. The polyurethane networks are rendered reprocessable by the incorporation of free hydroxyl groups and the incorporation of multi-functional alcohol crosslinkers.

The present invention relates to the field of polyol components suitable for forming polyurethane foam, in particular two component polyurethane foam the resulting foams and methods for their production. The present inventors found gaseous hydrohaloolefin containing polyol components possessing improved shelf-life properties, in particular polyol components comprising a gaseous hydrohaloolefin blowing agent, a nitrogen catalyst and a tin catalyst, wherein the tin catalyst comprises a sulfur atom. The present inventors also found that the shelf-life is further improved if the nitrogen catalyst is at least partially protonated by reaction with an acid, such as an organic acid.