申请人:Tominaga Naoki
公开号:US20120183492A1
公开(公告)日:2012-07-19
An external preparation for skin has a pH value of 2.0-5.0 and comprises: (a) 1.0-7.0 mass % of at least one of the members selected from hydroxy acids, (b) 0-0.1-3.0 mass % of a crosslinked type N,N-dimethylacrylamide-2-acrylamido-2-methylpropane sulfonic acid sodium salt copolymer, and (c) 0-0.1-3.0 mass % of an associating thickener constituted of a compound of the formula (1): R
1
—(O—R
2
)
k
—OCONH—R
3
[—NHCOO—(R
4
—O)
n
—R
5
]
h
}
m
(1) wherein R
1
represents a hydrocarbon group, R
2
and R
4
represent alkylene groups having 2-4 carbon atoms, which may be identical or different, or a phenylethylene group, R
3
represents a hydrocarbon group, which may have a urethane bond, R
5
represents a branched chain or secondary hydrocarbon group, m is a number of at least 2, h is a number of at least 1, k is a number within the range of 1-500, and n is a number within the range of 1-200.
一种外用皮肤制剂的pH值为2.0-5.0,包括:(a) 1.0-7.0质量%的至少一种羟基酸成员,(b) 0-0.1-3.0质量%的交联型N,N-二甲基丙烯酰胺-2-丙烯酰胺基-2-甲基丙烷磺酸钠共聚物,以及(c) 由式(1)的化合物构成的关联增稠剂,其质量%为0-0.1-3.0:
R1—(O—R2)k—OCONH—R3[—NHCOO—(R4—O)n—R5]h}m(1)
其中,R1代表烃基,R2和R4代表具有2-4个碳原子的亚烷基基团,可以相同也可以不同,或苯乙烯基团,R3代表烃基,可以具有脲键,R5代表支链或次级烃基,m至少为2,h至少为1,k在1-500范围内,n在1-200范围内。