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:
Sep. 23, 2025
Filed:
Sep. 15, 2022
Arakawa Chemical Industries, Ltd., Osaka, JP;
ARAKAWA CHEMICAL INDUSTRIES, LTD., Osaka, JP;
Abstract
A relatively inexpensive papermaking agent having a high concentration and a high molecular weight that exhibits an excellent freeness and paper strength effect obtained using starches which are biomass materials. A papermaking agent which is a (meth)acrylamide polymer containing starches (a1), a (meth)acrylamide (a2), a polymerizable monomer having an amino group (a3), a polymerizable monomer having a carboxy group (a4) and a polymerizable monomer having a sulfonate group (a5) as essential constituent components, wherein the ratio between the amount of the component (a1) used in terms of non-volatile content weight and a total amount of the components (a2) to (a5) used is [(a1)/{(a2)+(a3)+(a4)+(a5)}]=5/95 to 45/55, and wherein the (meth)acrylamide polymer has a non-volatile content concentration of 22 to 35 weight %, and a weight average molecular weight of 1,500,000 to 7,000,000.