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:
Oct. 22, 2002
Filed:
Aug. 30, 2000
Yoshiyuki Asahina, Nobeoka, JP;
Jun-ichi Kanemaru, Nobeoka, JP;
Asahi Kasei Kabushiki Kaisha, Osaka, JP;
Abstract
Disclosed is a novel polyisocyanate which is obtained by reacting at least one diisocyanate selected from the group consisting of an aliphatic diisocyanate and an alicyclic diisocyanate with a polyol having a number average molecular weight of from 3,000 to 30,000 and an average number of hydroxyl groups of from 2 to 3 and which has an allophanate linkage content of from 0.05 to 0.40, in terms of the ratio of the number of allophanate linkages in the polyisocyanate to the sum of the number of the allophanate linkages in the polyisodyanate and the number of urethane linkages in the polyisocyanate. The polyisocyanate of the present invention exhibits a high curing rate and a low viscosity. Further, the polyisocyanate, upon being cured, not only has no surface tack and exhibits a low modulus-in-tension property, but also exhibits a high tensile elongation property without a need for a plasticizer. Therefore, the polyisocyanate of the present invention can be advantageously used as a sealant. Also disclosed is a method for effectively and efficiently producing the polyisocyanate which, upon being cured, is improved with respect to a low modulus-in-tension property and a high tensile elongation property.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile