Double-compsn. polyurethane compsn. and its preparing method


Application Number: 00122557
Application Date: 2000.08.04
Publication Number: 1283653
Publication Date: 2001.02.14
Priority Information: 1999/8/5 JP 222157/99
International: C08L75/04;C09K3/10
Applicant(s) Name: Mitsui Chemical Industry Co., Ltd.
Address:
Inventor(s) Name: Kawana Tsune;Sakakuchi Hirohide;Usaka Kazuto
Patent Agency Code: 31100
Patent Agent: bai yihua
Abstract The two-component type polyurethane composition according to the present invention is obtained from a principal component containing a compound having an isocyanate group and a curing agent containing a compound having active hydrogen, and is characterized in that both the principal component and the curing agent contain substantially no thixotropic agent, the mixture of the principal component and the curing agent has a specific thixotropy-developing time and a specific slump, the active hydrogen compound has a specific flash point, and that the mass change of the two-component type polyurethane composition before/after boiling in boiling water under specific conditions is in a specific range. The two-component type polyurethane composition according to the present invention develops excellent thixotropy immediately after mixing the principal component and the curing agent, thereby enables its application under a variety of conditions such as mechanical-application and hand-application, and has excellent sag resistance and other physical properties suitable for sealing materials.