公开(公告)号：US20180036221A1

公开(公告)日：2018-02-08

申请号：US15784337

申请日：2017-10-16

Applicant: SHISEIDO COMPANY, LTD.

Inventor： Atsushi Sogabe ,  Ayano Matsuo ,  Shin-Ichi Yusa

IPC: A61K8/81 ,  A61Q19/00 ,  C08F8/44 ,  C08F120/58 ,  C08F120/06

CPC classification number: A61K8/8147 ,  A61K8/8152 ,  A61K8/8158 ,  A61K2800/10 ,  A61K2800/48 ,  A61Q19/00 ,  C08F8/44 ,  C08F120/06 ,  C08F120/58

Abstract: The invention provides methods of thickening aqueous compositions without increasing stringiness. The method involves using, as thickeners, polymers of polyacrylic acid, poly(2-acryamide-2-methylpropanesulfonate), or salts thereof, having a weight average molecular weight of 500,000-8,000,000. The polymers contain no more than 10 mass % of polymers having a molecular weight of 10,000,00 or more, and/or contain no more than 10 mass % of polymers having more than three times the weight average molecular weight. Aqueous solutions of these polymers have a low degree of stringiness, and are particularly useful as thickeners for cosmetics.

公开(公告)号：US11439582B2

公开(公告)日：2022-09-13

申请号：US15784337

申请日：2017-10-16

Applicant: SHISEIDO COMPANY, LTD.

Inventor： Atsushi Sogabe ,  Ayano Matsuo ,  Shin-Ichi Yusa

IPC: A61K8/81 ,  A61Q19/00 ,  C08F120/06 ,  C08F8/44 ,  C08F120/58

Abstract: Aqueous compositions can be thickened without increasing stringiness, by using polymers of polyacrylic acid, poly(2-acryamide-2-methylpropanesulfonate), or salts thereof, having a weight average molecular weights of 500,000 to 8,000,000 as thickeners. The polymers contain no more than 10 mass % of polymers having a molecular weight of 10,000,00 or more, and/or contain no more than 10 mass % of polymers having more than three times the weight average molecular weight. Aqueous solutions of these polymers exhibit a low degree of stringiness, and are particularly useful as thickeners for cosmetics.