Abstract: A purpose of the present invention is to provide a urethane composition which does not require use of a lead-based curing catalyst, exhibits excellent curability and workability, and can be advantageously used in a variety of applications, such as adhesives, coating materials, sealing materials, waterproofing materials, floor materials, wall materials and paints. The present invention provides a urethane composition which contains an active hydrogen-containing organic compound (A), a polyisocyanate (B), a curing catalyst (C), and an aromatic compound (D). The active hydrogen-containing organic compound (A) contains a polyol. The aromatic compound (D) has a structure represented by Chemical Formula (1).

Abstract: A catalyst for preparing polyester resins from monobasic or polybasic acids and polyhydric alcohols, comprising a Magnesium compound which has a bonding portion represented by formula —Mg—O—(CR12)a-Q, wherein Q is a Nitrogen or Sulfur and a is an integer from 1 to 4, is disclosed. Catalyst may further comprise Titanium compounds, for example titanium alkoxide, wherein titanium diisopropoxy bistriethanolaminate is particularly preferable from the viewpoint of reactivity and coloring property. Catalyst is capable of shortening production time for polyester resins.

Abstract: The present invention provides a catalyst for polyester polymerization capable of shortening production time of a polyester resin. An aspect of the present invention provides a catalyst for polyester polymerization comprising a magnesium compound (A), wherein the magnesium compound (A) has a bonding portion represented by formula (1). Mg—O—(C)a-Q??(1) (a is an integer from 1 to 4, and Q is a nitrogen atom or a sulfur atom.