Encapsulation of actives in core-shell and gel particles
First Claim
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1. A method for producing silicone particles where said method comprises emulsifying and reacting a composition comprising(I) a siloxane oligomer or polymer having units of
- where each Y is independently selected from O (oxygen radicals);
R′
;
an alkyl group with 1 to 30 C atoms, an aryl group having 6 to 15 carbon atoms, an alkaryl group having 6 to 15 carbon atoms, and an aralkyl group having 6 to 15 carbon atoms;
Z;
a reactive group selected from epoxy-functional groups or chlorohydrin functional groups;
Z′
;
a functional group that reacts with epoxy-functional groups or chlorohydrin functional groups and;
F;
functional group other than Z or Z′
, with the proviso that at least 50 mol % of the Y groups in the siloxane are R′
, and there are at least two Z and/or Z′
groups in the siloxane;
(II) a crosslinker wherein said crosslinker contains Z and/or Z′
groups with the proviso that when Y in siloxane (I) contains Z groups, the crosslinker contains Z′
groups;
when Y in siloxane (I) contains Z′
groups, the crosslinkor contains Z groups; and
when Y in siloxane (I) contains Z and Z′
groups, the crosslinker contains Z groups, Z′
groups or both;
(III) at least one emulsion liquid;
(IV) a surfactant; and
(V) an active ingredient selected from sunscreens, fragrances, vitamins, drugs, antiperspirant salts, and α
-hydroxy acids.
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Abstract
This invention pertains to silicone core-shell or gel particles that contain active ingredients. The silicone particles are produced by emulsifying and reacting a composition comprising a siloxane have a first reactive group, a crosslinker having a second reactive group, at least one emulsion liquid, a surfactant and an active ingredient. The active ingredient is encapsulated in the silicone particle and are useful in personal care products, textiles, auto care products, and laundry products for the delivery of active ingredients.
30 Citations
20 Claims
-
1. A method for producing silicone particles where said method comprises emulsifying and reacting a composition comprising
(I) a siloxane oligomer or polymer having units of - where each Y is independently selected from
O (oxygen radicals);
R′
;
an alkyl group with 1 to 30 C atoms, an aryl group having 6 to 15 carbon atoms, an alkaryl group having 6 to 15 carbon atoms, and an aralkyl group having 6 to 15 carbon atoms;
Z;
a reactive group selected from epoxy-functional groups or chlorohydrin functional groups;
Z′
;
a functional group that reacts with epoxy-functional groups or chlorohydrin functional groups and;
F;
functional group other than Z or Z′
,with the proviso that at least 50 mol % of the Y groups in the siloxane are R′
, and there are at least two Z and/or Z′
groups in the siloxane;(II) a crosslinker wherein said crosslinker contains Z and/or Z′
groups with the proviso that when Y in siloxane (I) contains Z groups, the crosslinker contains Z′
groups;
when Y in siloxane (I) contains Z′
groups, the crosslinkor contains Z groups; and
when Y in siloxane (I) contains Z and Z′
groups, the crosslinker contains Z groups, Z′
groups or both;
(III) at least one emulsion liquid;
(IV) a surfactant; and
(V) an active ingredient selected from sunscreens, fragrances, vitamins, drugs, antiperspirant salts, and α
-hydroxy acids.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- where each Y is independently selected from
-
20. A silicone particle produced by emulsifying and reacting a composition comprising
(I) a siloxane oligomer or polymer having units of - where each Y is independently selected from
O (oxygen radicals) R′
;
an alkyl group with 1 to 30 C atoms, an aryl group having 6 to 15 carbon atoms, an alkaryl group having 6 to 15 carbon atoms, and an aralkyl group having 6 to 15 carbon atoms;
Z;
a reactive group selected from epoxy-functional groups or chlorohydrin functional groups;
Z′
;
a functional group that reacts with epoxy-functional groups or chlorohydrin functional groups (i.e. amine, hydroxyl); and
F;
a functional group other than Z or Z′
;
with the proviso that at least 50 mol % of the Y groups in the siloxane are R′
, and there are at least two Z and/or Z′
groups in the siloxane;(II) a crosslinker wherein said crosslinker contains Z and/or Z′
groups with the proviso that when Y in siloxane (I) contains Z groups, the crosslinker contains Z′
groups;
when Y in siloxane (I) contains Z′
groups, the crosslinker contains Z groups; and
when Y in siloxane (I) contains Z and Z′
groups, the crosslinker contains Z group, Z′
groups or both;
(III) at least one emulsion liquid;
(IV) a surfactant; and
(V) an active ingredient selected from sunscreens, fragrances, vitamins, drugs, antiperspirant salts, and α
-hydroxy acids.
- where each Y is independently selected from
Specification