Patent ID: 8962749
Filing Date: 2015-02-24
Classification: C04B,C08G,Y10T

Abstract:
1. A thin ceramic green sheet which comprises a ceramic powder, and a urethane resin serving as a binder and formed by mixing an isocyanate and a polyol, wherein: the ratio by mole of hydroxyl group of the polyol which is employed for mixing to isocyanate group of the isocyanate which is employed for mixing falls within a range of 2/11.5 to 5/11.5; the urethane resin has a repeating unit-based molecular weight in a range of 290 to 988, said urethane resin repeating unit-based molecular weight being defined as the sum of a value obtained by dividing the molecular weight of an isocyanate group by the isocyanate group content of the isocyanate which is employed for mixing and a value obtained by dividing the molecular weight of a hydroxyl group by the hydroxyl group content of the polyol which is employed for mixing; and the ratio by weight of the urethane resin to the ceramic powder contained in the ceramic green sheet falls within a range of 7 to 10 parts by weight of the urethane resin with respect to 100 parts by weight of the ceramic powder.