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:
Feb. 09, 2021
Filed:
Sep. 01, 2016
Mitsui Chemicals, Inc., Tokyo, JP;
Hiroshi Kanayama, Chiba, JP;
Minoru Watanabe, Kawasaki, JP;
Makoto Kajiura, Ichihara, JP;
Satoshi Yamasaki, Chiba, JP;
MITSUI CHEMICALS, INC., Tokyo, JP;
Abstract
A buffer material including a skinned polyurethane foam including a foam layer and a skin layer formed on the surface of the foam layer, wherein the skinned polyurethane foam essentially contains no silicone compound, the foam layer is polyurethane foam, the skin layer is a polyurethane resin layer produced by reaction of a skin-isocyanate component containing an aliphatic and/or an alicyclic polyisocyanate with a skin-active hydrogen group-containing component, the skin layer has a storage modulus at 23° C. (E') of 1×10Pa or more and 3×10Pa or less, the foam layer has a storage modulus at 23° C. (E′) of 1×10Pa or more and 5×10Pa or less, and the ratio (E′/E′) of the storage modulus at 23° C. (E′) of the skin layer relative to the storage modulus at 23° C. (E′) of the foam layer is 10 or more and 500 or less.