Emulsifier
The present invention relates to a novel emulsifier which comprises at least one pregelatinized, crosslinked starch selected from a C 2 -C 5 hydroxyalkyl starch and a C 2 -C 18 acyl starch and at least one starch derivative containing a hydrophobic group or both a hydrophilic group and a hydrophic group, which has been degraded by reaction with an exo-enzyme capable of cleaving 1,4-alpha-D-glucosidic linkages from non-reducing ends of starch, but incapable of cleaving 1,6-alpha-D-glucosidic linkages of starch. Such emulsifier achieves stable compositions, which are salt tolerant and do not exhibit tackiness. Further, the emulsifier is ethoxylate-free and may be used in a variety of compositions, including cosmetic compositions.
1 . A composition comprising:
(a) a first component comprising at least one pregelatinized, crosslinked starch selected from a C 2 -C 5 hydroxyalkyl starch and a C 2 -C 18 acyl starch; and
(b) a second component comprising at least one starch derivative containing a hydrophobic group or both a hydrophilic group and a hydrophobic group, which has been degraded by reaction with an exo-enzyme capable of cleaving 1,4-alpha-D-glucosidic linkages from non-reducing ends of starch, but incapable of cleaving 1,6-alpha-D-glucosidic linkages of starch.
2 . The composition of claim 1 , wherein the first component is crosslinked using phosphorylation, or C 4 -C 18 alkane or alkene dicarboxylic acids.
3 . The composition of claim 2 , where the crosslinking is by reaction with a compound selected from the group consisting of phosphorous oxychloride, phosphorous pentoxide, sodium trimetaphosphate, or a mixture thereof.
4 . The composition of claim 3 , wherein the crosslinking is by reaction with phosphorous oxychloride.
5 . The composition of claim 1 , wherein the first component is a pregelatinized, crosslinked, hydroxypropylated starch or a pregleatinized, crosslinked, acylated starch.
6 . The composition of claim 1 , wherein the first component is a pregelatinized hydroxypropyl di-starch phosphate.
7 . The composition of claim 1 , wherein the first component is a pregelatinized acetylated di-starch adipate.
8 . The composition of claim 1 , wherein the second component is derivatized by reaction with an alkenyl cyclic dicarboxylic acid anhydride.
9 . The composition of claim 8 , wherein the second component is derivatized using a compound selected from octenylsuccinic acid anhydride, dodecenylsuccinic acid anhydride, and mixtures thereof.
10 . The composition of claim 1 , wherein the second component is degraded using an enzyme selected from the group consisting of beta-amylase, exo-alpha-1,4-glucosidase, exo-1,4-alpha-D-glucan maltotetrahydrolase, and exo 1,4-alpha-D-glucan maltohexahydrolase.
11 . The composition of claim 10 , wherein the enzyme is beta-amylase.
12 . The composition of claim 1 , wherein the second component has been converted to a water fluidity of up to about 60.
13 . The composition of claim 1 , wherein the second component is a converted octenyl succinic anyhydride starch derivative degraded using beta-amylase.
14 . A composition comprising a pregelatinized hydroxypropyl di-starch phosphate, and a converted octenyl succinic anyhydride starch derivative degraded using beta-amylase.
15 . The composition of claim 14 , wherein at least one component is prepared from a waxy corn starch.
16 . The composition of claim 14 , wherein the ratio of component 1 to component 2 is 2:1.
17 . The composition of claim 1 , wherein the composition is a cosmetic or a personal care composition.
18 . The composition of claim 17 , wherein the composition further contains up to 10% salt.
19 . The composition of claim 14 , wherein the composition is a cosmetic or a personal care composition.
20 . The composition of claim 19 , wherein the composition further contains up to 10% salt.
21 . A method of preparing a stable cosmetic or personal care emulsion comprising adding an emulsifying effective amount of the composition of claim 1 .
22 . A method of preparing a stable cosmetic or personal care emulsion comprising adding an emulsifying effective amount of the composition of claim 14.