CN108289812B - 防晒化妆品 - Google Patents
防晒化妆品 Download PDFInfo
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- CN108289812B CN108289812B CN201680069901.3A CN201680069901A CN108289812B CN 108289812 B CN108289812 B CN 108289812B CN 201680069901 A CN201680069901 A CN 201680069901A CN 108289812 B CN108289812 B CN 108289812B
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- 239000002537 cosmetic Substances 0.000 title claims abstract description 68
- 230000000475 sunscreen effect Effects 0.000 title claims abstract description 48
- 239000000516 sunscreening agent Substances 0.000 title claims abstract description 48
- 239000010696 ester oil Substances 0.000 claims abstract description 31
- 239000000203 mixture Substances 0.000 claims abstract description 29
- YBGZDTIWKVFICR-JLHYYAGUSA-N Octyl 4-methoxycinnamic acid Chemical compound CCCCC(CC)COC(=O)\C=C\C1=CC=C(OC)C=C1 YBGZDTIWKVFICR-JLHYYAGUSA-N 0.000 claims abstract description 28
- XNEFYCZVKIDDMS-UHFFFAOYSA-N avobenzone Chemical compound C1=CC(OC)=CC=C1C(=O)CC(=O)C1=CC=C(C(C)(C)C)C=C1 XNEFYCZVKIDDMS-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229960001679 octinoxate Drugs 0.000 claims abstract description 24
- 239000003921 oil Substances 0.000 claims abstract description 24
- 239000000126 substance Substances 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 238000001782 photodegradation Methods 0.000 claims abstract description 12
- 238000013329 compounding Methods 0.000 claims abstract description 7
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 23
- 239000006096 absorbing agent Substances 0.000 claims description 16
- 150000001983 dialkylethers Chemical class 0.000 claims description 7
- 125000005702 oxyalkylene group Chemical group 0.000 claims description 7
- 125000004432 carbon atom Chemical group C* 0.000 claims description 5
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 5
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 claims description 4
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 3
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- 125000006353 oxyethylene group Chemical group 0.000 claims description 3
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- SRMJRXAKBYSQQO-UHFFFAOYSA-N (2-aminobenzoyl) 2-aminobenzoate Chemical class NC1=CC=CC=C1C(=O)OC(=O)C1=CC=CC=C1N SRMJRXAKBYSQQO-UHFFFAOYSA-N 0.000 claims description 2
- OIQXFRANQVWXJF-QBFSEMIESA-N (2z)-2-benzylidene-4,7,7-trimethylbicyclo[2.2.1]heptan-3-one Chemical class CC1(C)C2CCC1(C)C(=O)\C2=C/C1=CC=CC=C1 OIQXFRANQVWXJF-QBFSEMIESA-N 0.000 claims description 2
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Abstract
本发明的目的在于提供一种防晒化妆品,其在4‑叔丁基‑4’‑甲氧基二苯甲酰基甲烷和甲氧基肉桂酸乙基己酯共存的体系中也不引起光劣化,可以稳定发挥高紫外线防护效果。本发明提供一种防晒化妆品,其特征在于,其包含:(a)0.5~5.0质量%的4‑叔丁基‑4’‑甲氧基二苯甲酰基甲烷;(b)3.0~10质量%的甲氧基肉桂酸乙基己酯;(c)5.0质量%以上的两亲性物质;和(d)含有IOB=0.05~0.60的酯油的液态油分;前述成分(a)、(b)和(c)的配混量满足以下关系:[(a)+(b)]/(c)=0.5~3.5。
Description
技术领域
本发明涉及防晒化妆品。更详细而言,涉及抑制紫外线吸收剂的光劣化,在从UVA到UVB的广泛的波长范围内可以稳定地发挥高紫外线防御能力,且使用性也优异的防晒化妆品。
背景技术
保护皮肤免受紫外线之害是护肤、身体护理中重要的课题之一,为了将紫外线对皮肤的不良影响抑制为最小限度,开发有各种防UV化妆品。作为防UV化妆品的1种的防晒化妆品(Sunscreen cosmetics)是通过用配混了紫外线吸收剂、紫外线散射剂的涂膜覆盖皮肤吸收或散射UVA和UVB被来抑制到达皮肤的紫外线量,从而意在保护皮肤免受紫外线之害的化妆品(非专利文献1)。
防晒化妆品中将化学吸收紫外线的紫外线吸收剂和物理地反射/散射紫外线的紫外线散射剂适宜组合进行配混,按照发挥良好紫外线防护效果来制备。紫外线吸收剂是具有吸收紫外线的能量结构的有机化合物,从吸收波长范围来看可以分类为UVA吸收剂、UVB吸收剂、以及在从UVA~UVB的波长范围内具有吸收带的广域吸收剂。
已知4-叔丁基-4’-甲氧基二苯甲酰基甲烷等二苯甲酰基甲烷衍生物作为在约360nm处具有最大吸收波长的UVA吸收剂在化妆品等中是通用的,但是缺乏光稳定性、由于光照射而紫外线防护效果降低(专利文献1)。专利文献1中记载有配混作为二苯甲酰基甲烷衍生物的4-(1,1-二甲基乙基)-4’-甲氧基二苯甲酰基甲烷和烷基芳基-1,3-丙二酮硅酮衍生物来显著增大光稳定性。但是,只有特定的二苯甲酰基甲烷衍生物被确认到有前述光稳定化效果。
另一方面,为了在从UVA到UVB的广泛的波长范围内得到良好的紫外线防护效果,需要组合UVA吸收剂和UVB吸收剂进行配混,但组合使用作为UVA吸收剂的二苯甲酰基甲烷衍生物和作为UVB吸收剂的甲氧基肉桂酸乙基己酯存在引起光劣化的问题。
专利文献2中公开了,通过配混三(聚丙二醇-3苄基醚)柠檬酸来抑制4-叔丁基-4’-甲氧基二苯甲酰基甲烷和甲氧基肉桂酸乙基己酯的光劣化,包含两者的紫外线吸收剂的防晒化妆品中的效果未得到确认。
现有技术文献
专利文献
专利文献1:日本特开2007-106701号公报
专利文献2:专利第5540243号公报
非专利文献
非专利文献1:《新化粧品学》(新化妆品学)第2版、光井武夫编、2001年、南山堂发行、第497~504页
发明内容
发明要解决的问题
因此本发明在于提供一种防晒化妆品,其在4-叔丁基-4’-甲氧基二苯甲酰基甲烷和甲氧基肉桂酸乙基己酯共存的体系中也不引起光劣化,可以稳定发挥高紫外线防护效果。
用于解决问题的方案
本发明人等为了解决上述课题进行了深入研究,结果发现通过在含有4-叔丁基-4’-甲氧基二苯甲酰基甲烷和甲氧基肉桂酸乙基己酯的防晒化妆品中配混两亲性物质和特定的油分,从而可以有效防止紫外线吸收剂的光劣化,得到在UVA~UVB的广泛波长范围内稳定发挥高紫外线防护效果(高SPF)的防晒化妆品,从而完成本发明。
即,本发明提供一种防晒化妆品,其特征在于,其包含:
(a)0.5~5.0质量%的4-叔丁基-4’-甲氧基二苯甲酰基甲烷;
(b)3~10质量%的甲氧基肉桂酸乙基己酯;
(c)5.0质量%以上的两亲性物质;和
(d)含有IOB=0.05~0.60的酯油的油分;
前述成分(a)、(b)和(c)的配混量满足以下关系:
[(a)+(b)]/(c)=0.5~3.5。
发明的效果
本发明的防晒化妆品即使最大限度含有4-叔丁基-4’-甲氧基二苯甲酰基甲烷和甲氧基肉桂酸乙基己酯也能抑制紫外线防御能力的光劣化,因此在从UVA到UVB的广泛的波长范围内可以长时间发挥高紫外线防护效果。进而本发明的防晒化妆品的使用性和保存性也优异。
具体实施方式
本发明的防晒化妆品含有(a)4-叔丁基-4’-甲氧基二苯甲酰基甲烷、(b)甲氧基肉桂酸乙基己酯、(c)两亲性物质、和(d)含有IOB=0.05~0.60的酯油的液态油分作为必须成分。以下详细说明。
(a)4-叔丁基-4’-甲氧基二苯甲酰基甲烷
4-叔丁基-4’-甲氧基二苯甲酰基甲烷是UVA范围内具有最大吸收波长的二苯甲酮系紫外线吸收剂的一种,一直以来广泛用于化妆品等。
本发明使用的4-叔丁基-4’-甲氧基二苯甲酰基甲烷可以是市售品,例如科例示出名称为“Parsol 1789”的、由DSMNutrition Japan株式会社销售的产品。
本发明的防晒化妆品中的成分(a)4-叔丁基-4’-甲氧基二苯甲酰基甲烷的配混量为0.5~5.0质量%,优选为0.5~3.0质量%,更优选为1.0~2.5质量%。
(b)甲氧基肉桂酸乙基己酯
甲氧基肉桂酸乙基己酯是在UVB范围内具有最大吸收波长的肉桂酸系紫外线吸收剂的一种。本发明使用的甲氧基肉桂酸乙基己酯可以是市售品,例如可例示出名称为“Parsol MCX”的、由DSMNutrition Japan株式会社销售的产品。
本发明的防晒化妆品中的成分(b)甲氧基肉桂酸乙基己酯的配混量为3.0~10.0质量%,优选为4.0~8.0质量%,更优选为5.0~7.5质量%。
(c)两亲性物质
本发明使用的两亲性物质(成分(c))为选自氧亚烷基衍生物和多元醇衍生物的1种或2种以上。
作为本发明中的氧亚烷基衍生物,优选为下述式(I)所示的聚氧亚烷基/聚氧乙烯共聚物二烷基醚。
R1O-[(AO)m(EO)n]-R2 (I)
上述式(I)中,AO表示碳数3~4的氧亚烷基。具体而言,可列举出氧亚丙基、氧亚丁基、氧亚异丁基、氧三亚甲基、氧四次甲基等。优选列举出氧亚丙基、氧亚丁基。EO表示氧亚乙基。
m为AO的平均加成摩尔数,1≤m≤70,优选为2≤m≤20。n为EO的平均加成摩尔数,1≤n≤70,优选为2≤n≤20。
对AO和EO的加成的顺序没有特别的限定。AO和EO可以加成为嵌段状的嵌段共聚物,或者可以为无规加成的无规共聚物。嵌段共聚物不仅限于2段嵌段,还包含包括3段以上的嵌段的共聚物。优选使用无规共聚物。
前述式(I)所示的聚氧亚烷基/聚氧亚乙基共聚物二烷基醚的分子量优选使用约500~5000者。相对于一分子中的AO和EO的总量,EO的比率[EO/(AO+EO)]优选为20~80质量%。
R1和R2各自独立地表示碳数1~4的烃基或氢原子。作为烃基,可列举出甲基、乙基、正丙基、异丙基、正丁基、仲丁基、叔丁基等。优选为甲基、乙基。
一分子中的R1和R2可以各自为相同的1种烃基,也可以烃基和氢原子混合存在,也可以碳数不同的多种烃基混合存在。其中,分别对于R1和R2的烃基和氢原子的存在比率,氢原子的数量(Y)相对于烃基的数量(X)的比率(Y/X)优选为0.15以下,更优选为0.06以下。
作为本发明中优选使用的聚氧亚烷基/聚氧亚乙基共聚物二烷基醚的具体例子,包含以下的聚氧亚丙基/聚氧亚乙基共聚物二甲基醚,但并不限定于此。
POP(2)POE(9)二甲基醚(无规共聚物)
POP(4)POE(17)二甲基醚(无规共聚物)
POP(7)POE(14)二甲基醚(无规共聚物)
POP(9)POE(11)二甲基醚(无规共聚物)
POP(28)POE(55)二甲基醚(无规共聚物)
POP(41)POE(36)二甲基醚(无规共聚物)
POP(6)POE(3)二甲基醚(无规共聚物)
POP(3)POE(6)二甲基醚(无规共聚物)
POP(4)POE(8)二甲基醚(无规共聚物)
POP(11)POE(6)二甲基醚(无规共聚物)
POP(27)POE(14)二甲基醚(无规共聚物)
作为本发明中用作两亲性物质(成分(c))的多元醇衍生物的例子,可列举出:甘油、二乙二醇、二丙二醇、二丁二醇、聚乙二醇(也记为“PEG”)、聚丙二醇(也记为“PPG”)和聚丁二醇(也记为“PBG”),从可以用于化妆品等皮肤外用剂的物质中选择,优选分子量500以上者,进一步优选为分子量1000以上者。对分子量的上限值没有特别的限定,适宜使用例如分子量为4000以下、3000以下或2500以下的物质。
本发明的防晒化妆品中的两亲性物质(成分(c))为选自氧亚烷基衍生物和多元醇衍生物的1种或2种以上,优选包含氧亚烷基衍生物、尤其是至少1种聚氧亚烷基/聚氧亚乙基共聚物二烷基醚,其中,优选包含聚氧亚丙基/聚氧亚乙基共聚物二甲基醚。
两亲性物质(成分(c))的配混量为5.0质量%以上,优选为5.0~10质量%。配混量小于5.0质量%时,有时不能充分得到光稳定性提高的效果,配混大于10质量%时,有时影响乳化稳定性、使用性。
本发明的防晒化妆品的特征在于,前述(a)4-叔丁基-4’-甲氧基二苯甲酰基甲烷、(b)甲氧基肉桂酸乙基己酯和(c)两亲性物质的配混量满足如下关系:[(a)+(b)]/(c)=0.5~3.5。配混量比率([(a)+(b)]/(c))优选为1.0~3.0,更优选为1.0~2.5。该比率大于3.5的情况下,有时不能充分抑制紫外线吸收剂的光劣化的情况;小于0.5时存在化妆品的乳化稳定性或者保存性劣化的倾向。
(d)液态油分
本发明的防晒化妆品中配混的液态油分(成分(d))为含有IOB=0.05~0.60的酯油的常温下为液态的油分。该酯油的IOB值优选为0.07~0.55,更优选为0.1~0.5的范围内。
需要说明的是,本发明中的“酯油的IOB值(Inorganic/Organic Balance Value,无机有机平衡值)”是指将在化妆品配混的各酯油的IOB值乘以各酯油的配混量相对于全部酯油的总计配混量的比率得到的值定义为对于全部酯油总计的值。因此,化妆品仅含有1种酯油时,该化妆品中的酯油的IOB值与该酯油固有的IOB值一致。
作为本发明中能够使用的酯油,可列举出:2-乙基己酸十六烷基酯、三异辛基甘油酯、癸二酸二异丙酯、肉豆蔻酸异丙酯、特戊酸三丙二醇酯、四(2-乙基己酸)季戊四醇酯、琥珀酸二乙基己酯、己二酸二庚基十一烷酯、二异硬脂酸甘油酯、L-月桂酰基谷氨酸二(植物甾醇酯/辛基十二烷基酯)、2-癸基十四醇、二异硬脂醇苹果酸酯、橄榄油、绣线菊籽油、异硬脂酸异十六烷酯、霍霍巴油等。
酯油可以组合配混一种或二种以上。例如在使用将癸二酸二异丙酯(IOB=0.4)与2-乙基己酸十六烷基酯(IOB=0.13)按照1∶1的比率组合而成的酯油时,该酯油的IOB值为[0.4×1/2]+[0.13×1/2]=0.265,满足本发明的条件。
成分(d)的“液态油分”在前述酯油的基础上,还可以包含在化妆品可以配混的、常温下为液态的其它液态油性成分,例如:烃油、高级脂肪酸、高级醇、硅油等。
作为烃油,可例示出:液体石蜡、地蜡(ozocerite)、角鲨烷、姥鲛烷、石蜡、纯地蜡(ceresin)、角鲨烯、凡土林、微晶蜡、聚乙烯蜡、费-托蜡等。
作为高级脂肪酸,可例示出月桂酸、肉豆蔻酸、棕榈酸、硬脂酸、二十二酸、花生四烯酸等。
作为高级醇,可例示出:月桂醇、肉豆蔻醇、鲸蜡醇、硬脂醇、二十二醇、花生醇、鲨肝醇、鲛肝醇、廿四醇、蜡醇、芫荽醇、蜂花醇、虫蜡醇、反油醇、异硬脂酰基甘油醚、辛醇、三十烷醇、鲨油醇、十六十八烷醇、油醇、羊毛脂醇、氢化羊毛脂醇、己基癸醇、辛基癸醇等。
作为有机硅油,可例示出:甲基聚硅氧烷、八甲基硅氧烷、十甲基四硅氧烷、甲基氢聚硅氧烷、甲基苯基聚硅氧烷、六甲基环三硅氧烷、八甲基环四硅氧烷、十甲基环五硅氧烷等。优选例示出八甲基环四硅氧烷和十甲基环五硅氧烷等。
其中,酯油占液态油分(成分(d))的比率优选设定为30质量%以上,更优选为50质量%以上。酯油所占的比率小于30质量%时,存在防止紫外线吸收剂光劣化的效果降低的倾向。
本发明的防晒化妆品中的液态油分(成分(d))的配混量为1~80质量%,优选为3~70质量%,更优选为5~60质量%。因此,本发明的防晒化妆品中的酯油的配混量为0.3~40质量%,优选为0.9~35质量%,更优选为1.5~30质量%。
本发明人等认为,在(a)4-叔丁基-4’-甲氧基二苯甲酰基甲烷与(b)甲氧基肉桂酸乙基己酯共存的体系中产生的紫外线防护效果的光劣化与4-叔丁基-4’-甲氧基二苯甲酰基甲烷与甲氧基肉桂酸乙基己酯的相互作用相关。例如体系中所包含的水等挥发而溶剂量减少,4-叔丁基-4’-甲氧基二苯甲酰基甲烷与甲氧基肉桂酸乙基己酯相互接近/碰撞的频率提高,因此认为由于两者的相互作用而进行光劣化是一个原因。本发明的化妆品中,非挥发性的(c)两亲性物质和(d)液态油分用作紫外线吸收剂的溶剂,因此即便在水等挥发后也会抑制4-叔丁基-4’-甲氧基二苯甲酰基甲烷与甲氧基肉桂酸乙基己酯的相互作用频率,从而防止光劣化。
因此,本发明提供一种防止防晒化妆品的光劣化的方法,其包括在包含(a)4-叔丁基-4’-甲氧基二苯甲酰基甲烷和(b)甲氧基肉桂酸乙基己酯的防晒化妆品中配混(c)5.0质量%以上的两亲性物质和(d)含有IOB=0.05~0.60的酯油的液态油分。
本发明的防晒化妆品中,可以最大限度配混作为UVA吸收剂的(a)4-叔丁基-4’-甲氧基二苯甲酰基甲烷和作为UVB吸收剂的(b)甲氧基肉桂酸乙基己酯,通过含有(c)两亲性物质和(d)含有IOB=0.05~0.60的酯油的液态油分的配混,紫外线吸收剂的光劣化受到抑制,因此在从UVA到UVB的波长范围内长时间发挥充分高的紫外线防御能力(例如:SPF15以上)。
然而,进一步配混(a)4-叔丁基-4’-甲氧基二苯甲酰基甲烷和(b)甲氧基肉桂酸乙基己酯以外的其它紫外线吸收剂,可以进一步提高UVA和/或UVB范围的紫外线防御能力效果,或者减少4-叔丁基-4’-甲氧基二苯甲酰基甲烷和/或甲氧基肉桂酸乙基己酯的配混量地制备。
作为其它紫外线吸收剂,可以选择化妆品中通常使用的物质,没有特别的限定。可例示出例如选自对氨基苯甲酸衍生物、水杨酸衍生物、β,β-二苯基丙烯酸酯衍生物、二苯甲酮衍生物、苄叉基樟脑衍生物、苯基苯并咪唑衍生物、三嗪衍生物、苯基苯并三唑衍生物、氨茴内酐衍生物、咪唑啉衍生物、苯亚甲基丙二酸酯衍生物、4,4-二芳基丁二烯衍生物等的1种或2种以上。
本发明的防晒化妆品在如上所述的紫外线吸收剂的基础上,还可以配混通过反射/散射而物理地屏蔽紫外线的粉体(紫外线散射剂)。
本发明使用的紫外线散射剂只要是化妆品领域中用作紫外线散射剂的粉体就没有特别的限定。作为具体例子,可列举出选自氧化钛、氧化锌、硫酸钡、氧化铁、滑石、云母、绢云母、高岭土、云母钛、普鲁士兰、氧化铬、氢氧化铬、氧化硅、氧化铈等的1种或2种以上。尤其从光学的特性来看,优选使用具有1.5以上的折射率的粉体例如氧化锌、氧化钛。
紫外线散射剂通过表面疏水化处理提高在油中的分散性、耐水性,在本发明中优选使用经表面疏水化处理的紫外线散射剂。
作为表面处理的方法,可列举出:甲基氢聚硅氧烷、甲基聚硅氧烷等的有机硅处理;烷基硅烷处理;经全氟烃基磷酸脂、全氟醇等的氟处理;经N-酰基谷氨酸等的氨基酸处理;除此以外还有卵磷脂处理;金属皂处理;脂肪酸处理;烷基磷酸酯处理等。
对本发明使用的紫外线散射剂没有特别的限定,通常优选平均一次粒径为100nm以下者,更优选为80nm以下。平均一次粒径大于100nm时存在成为泛白(whiteness)、白色粉末残留(residual whiteness)的原因的倾向。
需要说明的是,本发明中的平均一次粒径是指例如由透射电子显微镜照片求出的、颗粒的长轴的长度和短轴的长度的算术平均值。
对紫外线散射剂的颗粒形状没有特别的限定,可以是一次颗粒的状态,也可以是形成聚集的二次集合体。另外,为球状、椭圆形状、破碎状等形状,没有特别的限定。
在本发明的防晒化妆品中配混紫外线散射剂时,其配混量为1~30质量%,优选设定为3~25质量%。配混量小于1质量%未时得到的紫外线防护效果的提高不充分;配混大于30质量%时,涂布时的泛白变得显著,产生浮粉的使用感(powdery sensation)。需要说明的是,本发明的防晒化妆品利用紫外线吸收剂得到充分的紫外线防护效果,因此还可以以不包含紫外线散射剂的方式提供。
本发明的防晒化妆品在前述必须成分、其它紫外线吸收剂和紫外线散射剂的基础上,还可以在不损害本发明的效果的范围内包含防晒化妆品中通常能够配混的其它任意成分。
作为其它任意成分,可列举出水溶性高分子、油溶性高分子、蜡类等固态油分、低级醇、保湿成分、表面活性剂、粉末成分、药剂等,但并不限定于这些例示。
作为水溶性高分子,可以举出2-丙烯酰胺-2-甲基丙磺酸(以下简记为“AMPS”)的均聚物或共聚物。共聚物为与乙烯基吡咯烷酮、丙烯酰胺、丙烯酸钠、丙烯酸羟乙酯等共聚单体构成的共聚物。即,可以举出AMPS均聚物、乙烯基吡咯烷酮/AMPS共聚物、二甲基丙烯酰胺/AMPS共聚物、丙烯酰胺/AMPS共聚物、丙烯酸钠/AMPS共聚物等。
此外,可以例示出:羧基乙烯基聚合物、聚丙烯酸铵、聚丙烯酸钠、丙烯酸钠/丙烯酸烷基酯/甲基丙烯酸钠/甲基丙烯酸烷基酯共聚物、角叉菜胶、果胶、甘露聚糖、凝胶多糖、硫酸软骨素、淀粉、糖原、阿拉伯胶、透明质酸钠、黄蓍胶、黄原胶、硫酸粘多糖、羟乙基瓜尔胶、羧甲基瓜尔胶、瓜尔胶、葡聚糖、硫酸角质、刺槐豆胶、琥珀酰聚糖、壳多糖、壳聚糖、羧甲基壳多糖、琼脂等。
作为油溶性高分子,可例示出三甲基硅烷氧基硅酸、烷基改性硅酮、聚酰胺改性硅酮、二甲基硅油交联聚合物、(二甲基硅油/乙烯基二甲基硅油)交联聚合物、聚甲基倍半硅氧烷等。
作为蜡类,例如可例示出:蜂蜡、小烛树蜡、巴西棕榈蜡、羊毛脂、液态羊毛脂、霍霍巴蜡等。
可列举出低级醇,乙醇、异丙醇等碳数1~5的醇。
作为保湿成分,可例示出乙二醇、丙二醇、1,3-丁二醇、二丙二醇、聚丁二醇等多元醇等。
表面活性剂可列举出阴离子性、阳离子性、非离子性、或两性的表面活性剂,包括有机硅系或烃系的表面活性剂。
作为粉末成分,可例示出尼龙、丙烯酸系的聚合物球状粉末、氧化硅粉末、有机硅粉末、用不包含金属的表面处理剂进行了表面处理的金属氧化物粉末等。
作为药剂,可以例示L-抗坏血酸及其衍生物的盐,甘草酸二钾、甘草酸单铵等甘草酸及其衍生物;甘草酸硬脂酯等甘草酸及其衍生物;尿囊素、凝血酸及其衍生物的盐;烷氧基水杨酸及其衍生物的盐;谷胱甘肽及其衍生物的盐;尿囊素、甘菊环等。
作为其它成分,可例示出海藻糖、赤藓醇等糖类;透明质酸、乙酰化透明质酸等多糖类;丝氨酸、甘氨酸、羟脯氨酸、谷氨酸、丙氨酸等氨基酸类;蚕丝提取物、绿藻提取物、水解珍珠蛋白质、矢车菊提取物、甜茶提取物、酵母提取物、肌醇、甘草提取物、地榆提取物、玫瑰提取物、薏仁等提取物等。
本发明的防晒化妆品可以以水包油型乳化化妆品、油包水型乳化化妆品、或者油性化妆品的形式提供。作为具体的剂型,有防晒乳液、防晒霜这样的剂型,可以使用适合于各剂型的常规方法来制造。
实施例
下面,列举实施例进一步详述说明本发明,但本发明并不受这些的任何限定。配混量没有特别限定,以其成分相对于配混体系的质量%表示。
(1)油包水型乳化防晒化妆品
(1-1)按照下述表1和表2所示组成制备油包水型乳化防晒化妆品的试样。具体而言,混合油性成分,使粘土矿物(二硬脂基二甲基铵锂蒙脱石)分散,添加另行混合的水性成分并用均质混合器进行乳化处理。
接着,对于各例的试样,用以下的方法评价防晒化妆品的光稳定性(紫外线吸收能的稳定性)。关于光稳定性,对残留率为60%以上或相对于基准水准的残留率的比率(提高率)大于103%的试样判断为光稳定性高。
将各例的试样在PMMA基板上涂布样品,测定500-280nm的吸光度。该基板用日照实验试验机照射2小时UV后,同样地测定吸光度,照射前后的前述波长范围的吸光度累积值的变化(光照射后的紫外线吸收能的残留率)按照下式算出。
光照射后的残留率(%)=(光照射后的吸光度累积值)/(光照射前的吸光度累积值)×100
各例中的光照射后的残留率(%)的值一并示于表2。
[表1]
原料名 | 配混量(质量%) |
纯化水 | 余量 |
乙醇 | 3 |
PEG-9聚二甲基硅氧基乙基二甲硅油 | 0.8 |
二硬脂基二甲基铵锂蒙脱石 | 0.2 |
环二甲基硅油 | 5 |
对甲氧基肉桂酸2-乙基己酯 | 7.5 |
4-叔丁基-4’-甲氧基二苯甲酰基甲烷 | 2.5 |
三异辛酸甘油酯(IOB=0.36) | 30 |
异十二烷 | 24 |
两亲性物质(表2) | 表2(*) |
总计 | 100 |
[表2]
由表2所示结果表明,在配混有5质量%以上IOB=0.05~0.60的酯油以及两亲性物质的实施例1~18中,与不包含两亲性物质时(比较例1)相比光照射后的残存率格外提高。
(1-2)对于具有下述表3~表5记载的组成的油包水型乳化防晒化妆品进行与前述(1-1)同样的评价。评价结果一并示于表3~5。
[表3]
[表4]
[表5]
由表3~5所示的结果表明,配混的酯油的IOB值只要处于本申请发明的特定的范围内,无论酯油的种类、配混量,都得到应有的光稳定化效果。
(1-3)对于具有下述表6记载的组成的油包水型乳化防晒化妆品进行与(1-1)同样的评价。评价结果一并示于表6。
[表6]
由表6所示的结果可以确认,即使配混规定IOB值的酯油和两亲性物质,在两亲性物质的配混量小于5质量%时不能得到充分的光稳定化效果。
(1-4)对于具有下述表7记载的组成的油包水型乳化防晒化妆品进行与(1-1)同样的评价。评价结果一并示于表7。
[表7]
由表7所示的结果可以确认,配混规定IOB值的酯油和两亲性物质、还配混有其它紫外线吸收剂的化妆品得到充分的光稳定化效果。
(2)水包油型乳化防晒化妆品
按照下述表8和表9所示的组成制备水包油型乳化防晒化妆品的试样。具体而言,在水性成分中溶解增稠剂(卡波姆等),添加另行混合/溶解的油性成分并用均质混合器进行乳化处理。
对于得到的各例的化妆品进行与(1-1)同样的评价。评价结果一并示于表8和9。
[表8]
[表9]
由表8和9所示的结果可以确认,即使为水包油型乳化的形态,通过配混规定IOB值的酯油和两亲性物质而得到优异的光稳定化效果。
以下列举本发明的防晒化妆品的其它配方(实施例)。这些化妆品均得到优异的光稳定化效果。
配方1:水包油型防晒凝胶
[表10]
原料名 | 实施例53 |
纯化水 | 余量 |
聚氧亚乙基(20)聚氧亚丙基(8)二甲基醚 | 3 |
甘油 | 5 |
二丙二醇 | 4 |
2-乙基己酸十六烷基酯(IOB=0.13) | 10 |
对甲氧基肉桂酸2-乙基己酯 | 8 |
4-叔丁基-4’-甲氧基二苯甲酰基甲烷 | 2 |
卡波姆 | 0.1 |
氢氧化钾 | 适量 |
聚氧亚乙基(14)聚氧亚丙基(7)二甲基醚 | 5 |
香料 | 适量 |
透明质酸 | 0.1 |
玫瑰提取物 | 0.2 |
甘草酸二钾 | 0.5 |
1,3-丁二醇 | 3 |
总计 | 100 |
制造方法:在水性成分中溶解增稠剂,添加另行混合/溶解的油性成分并用均质混合器进行乳化处理。
配方2:水包油型美白防护霜
[表11]
原料名 | 实施例54 |
纯化水 | 余量 |
甘油 | 5 |
二丙二醇 | 4 |
矿物油 | 10 |
肉豆蔻酸异丙酯 | 5 |
对甲氧基肉桂酸2-乙基己酯 | 6 |
4-叔丁基-4’-甲氧基二苯甲酰基甲烷 | 3 |
卡波姆 | 0.2 |
丙烯酸/甲基丙烯酸烷基酯共聚物 | 0.1 |
氢氧化钾 | 适量 |
聚氧亚乙基(9)聚氧亚丙基(11)二甲基醚 | 5 |
香料 | 适量 |
凝血酸 | 2.5 |
烷氧基水杨酸 | 1 |
乙酰化透明质酸 | 0.1 |
地榆提取物 | 0.2 |
甘草酸二钾 | 0.5 |
1,3-丁二醇 | 3 |
总计 | 100 |
制造方法:在水性成分中溶解增稠剂,添加另行混合/溶解的油性成分并用均质混合器进行乳化处理。
配方3:油包水型防晒乳液
[表12]
制造方法:混合油性成分,使粉末分散,添加另行混合的水性成分并用均质混合器进行乳化处理。
配方4:油包水型化妆防晒喷雾
[表13]
制造方法:混合油性成分,使粉末分散,添加另行混合的水性成分并用均质混合器进行乳化处理。将得到的原液和液化气体(LPG)以指定比率填充到气雾剂罐内。
配方5:油包水型底妆乳霜
[表14]
制造方法:混合油性成分,使粘土矿物和粉末分散,添加另行混合的水性成分并用均质混合器进行乳化处理。
Claims (4)
1.一种防晒化妆品,其特征在于,其包含:
(a)0.5~5.0质量%的4-叔丁基-4’-甲氧基二苯甲酰基甲烷;
(b)3.0~10质量%的甲氧基肉桂酸乙基己酯;
(c)5.0质量%以上的两亲性物质;和
(d)含有IOB=0.05~0.60的酯油的液态油分;
所述成分(a)、(b)和(c)的配混量满足以下关系:
[(a)+(b)]/(c)=0.5~3.5,
所述(c)5.0质量%以上的两亲性物质为下述式(I)所示的聚氧亚烷基/聚氧亚乙基共聚物二烷基醚:
R1O-[(AO)m(EO)n]-R2 (I)
式(I)中,R1和R2各自独立地表示甲基、乙基、正丙基、异丙基、正丁基、仲丁基或叔丁基,AO表示碳数3~4的氧亚烷基,EO表示氧亚乙基,1≤m≤70、1≤n≤70。
2.根据权利要求1所述的化妆品,其中,所述聚氧亚烷基/聚氧亚乙基共聚物二烷基醚是无规型的。
3.根据权利要求1或2所述的化妆品,其还包含选自对氨基苯甲酸衍生物、水杨酸衍生物、β,β-二苯基丙烯酸酯衍生物、二苯甲酮衍生物、苄叉基樟脑衍生物、苯基苯并咪唑衍生物、三嗪衍生物、苯基苯并三唑衍生物、氨茴内酐衍生物、咪唑啉衍生物、苯亚甲基丙二酸酯衍生物、4,4-二芳基丁二烯衍生物的1种或2种以上其它紫外线吸收剂。
4.一种防止防晒化妆品的光劣化的方法,其包括:
在包含(a)4-叔丁基-4’-甲氧基二苯甲酰基甲烷和(b)甲氧基肉桂酸乙基己酯的防晒化妆品中,以成分(a)、(b)和(c)的配混量满足以下关系:[(a)+(b)]/(c)=0.5~3.5的方式,配混(c)5.0质量%以上的两亲性物质和(d)含有IOB=0.05~0.60的酯油的液态油分,
所述(c)5.0质量%以上的两亲性物质为下述式(I)所示的聚氧亚烷基/聚氧亚乙基共聚物二烷基醚:
R1O-[(AO)m(EO)n]-R2 (I)
式(I)中,R1和R2各自独立地表示甲基、乙基、正丙基、异丙基、正丁基、仲丁基或叔丁基,AO表示碳数3~4的氧亚烷基,EO表示氧亚乙基,1≤m≤70、1≤n≤70。
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