The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 31, 2002
Filed:
Mar. 08, 2001
Toshio Endo, Ohtake, JP;
Takuya Miho, Yamaguchi-ken, JP;
Daicel Chemical Industries, Ltd., Osaka, JP;
Abstract
The invention provides polyester dials suitable for preparation of polyurethanes, and provides polyurethanes derived therefrom. The invention also provides spandex filaments prepared from these polyurethanes, which exhibit improved elasticity, tensile strength, and resistance to hydrolysis. The present invention also provides dialkyl amino group-containing polyol additives having a high solubility in dimethylacetamide solvent, which when incorporated into a polyurethane protect the polyurethane and derived spandex filaments from deterioration or discoloration, and confer an improved modulus of elasticity. The polyurethanes and spandex filaments of the invention provide fabrics having a soft feeling, excellent hydrolysis resistance, wrinkle resistance, and adhesive properties, and which are particularly suitable for preparation of an artificial leather.