Silicone elastomer compositions

Details Silicone elastomer compositions Silicone elastomer compositions

2001-12-13

2003-11-25

Dawson, Robert (Department: 1712)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C528S026000, C528S027000, C528S028000, C528S029000, C528S038000, C524S268000

Reexamination Certificate

active

06653378

ABSTRACT:

FIELD OF THE INVENTION
This invention relates to silicone elastomer compositions in the form of gels and/or organized structures.
BACKGROUND OF THE INVENTION
In personal care formulations it has become desirable to use low viscosity silicones to impart a number of benefits to the formulation. However, because of the addition of the low viscosity silicone, there must be additionally added a thickener to the personal care formulation. Certain silicone polymers have found utility as the thickening agent because they can be used in the quantities necessary to thicken the composition without degrading the properties of the personal care formulation. Typically, the silicone polymer and low viscosity silicone are combined to form a paste. This paste can then be used in the personal care formulation. Such silicone polymers are described in U.S. Pat. No. 4,987,169 to Kuwata et al., U.S. Pat. No. 5,760,116 to Kilgour et al., U.S. Pat. No. 5,811,487 to Schulz, Jr. et al. and U.S. Pat. No. 5,889,108 to Zhang and U.S. Pat. No. 6,238,657 to Lin et al.
This invention pertains to functionalized silicone elastomer compositions that are in the form of gels and/or organized structures. These functionalized silicone elastomer compositions are particularly useful in personal care formulations.
SUMMARY OF THE INVENTION
This invention pertains to silicone elastomer compositions that may be in the form of gels and/or organized structures. The silicone elastomers may be produced by reacting
(I) 0.1 to 99.89 wt. % based on the weight of all components (i.e. A-C and any optional components) of a siloxane oligomer or polymer having units of
where each Y is independently selected from
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);
F: a functional group other than Z or Z′, and
O (oxygen radicals);
with the proviso that at least 50 mol % of the Y groups in the siloxane are R′, preferably methyl and there are at least two Z and/or Z′ groups in the siloxane;
(II) 0.1 to 99.89 wt. % based on the weight of all components of 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 groups, Z′ groups or both,
further wherein (I), (II) or both (I) and (II) contain at least one F group;
in (III) 0.1 to 99.89 wt. % based on the weight of all components a diluent selected from (i) water; (ii) a silicone fluid; (iii) a polar organic compound and (iv) a non-polar organic compound and (v) mixtures thereof.
Depending on the diluent (III) selected for the reaction between the siloxane and the crosslinker, the resulting elastomer may be in the form of a gel or organized structure. The elastomers of the instant invention are particularly useful in personal care products, textiles, auto care products, and laundry products and for the delivery of active ingredients.
DETAILED DESCRIPTION OF THE INVENTION
This invention pertains to silicone elastomer compositions that may be in the form of gels or organized structures, for example. The silicone elastomers are produced by reacting
(I) 0.1 to 99.89 wt. % based on the weight of all components (i.e. I-III and any optional components) of a siloxane oligomer or polymer having units of
where each Y is independently selected from
R′ is selected from the group consisting of 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 is selected from epoxy functional groups, chlorohydrin functional groups or mixtures thereof,
Z′ is a functional group that react with epoxy groups or chlorohydrin functional groups (i.e. amine, hydroxyl),
F is a functional groups other than Z or Z′, and
O (oxygen radicals);
with the proviso that at least 50 mol % of the Y groups in the siloxane are R′, preferably methyl and there are at least two Z and/or Z′ groups in the siloxane;
(II) 0.1 to 99.89 wt. % based on the weight of all components of 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, Z′ or both,
further wherein (I), (II) or both (I) and (II) contain at least one F group;
in (III) 0.1 to 99.89 wt. % based on the weight of all components of a diluent selected from (i) water; (ii) a silicone fluid; (iii) a polar organic compound and (iv) a non-polar organic compound and (v) mixtures thereof.
Depending on the diluent (III) selected the resulting elastomer may be in the form of a gel or organized structure. By “organized structure” it is meant liquid crystals, vesicles, bi-layers, microemulsions, micelles, sponge phase and the like. By “gel” it is meant a polymeric material having varying viscosities depending on the amount of polymer and diluent and can include liquids, pastes, gels, rubbers and the like.
Functional groups such as polyether groups, quaternary ammonium salt groups, monohydroxy alcohol groups, polyhydroxy alcohol groups, carbohydrate groups, acrylate groups, ester groups, amide groups, carbonate groups, carboxylate groups, sulfonate groups, sulfate groups, halogen groups, or trialkoxysilyl groups, are present in the silicone elastomer composition. Such functional groups may be present in the silicone elastomer composition by blending into the elastomer a compound containing the functional group, using a diluent that contains the functional group, using a siloxane (I) and/or crosslinker (II) that contains the functional group and/or reacting the functional group into the silicone elastomer composition.
Component (I) is a siloxane oligomer or polymer having units of
where Y independently is
R
40
is selected from the group consisting of 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 is selected from epoxy functional groups, chlorohydrin functional groups, or mixtures thereof
Z′ is a functional group that react with epoxy groups or chlorohydrin functional groups (i.e. amine, hydroxyl),
F is a functional groups other than Z or Z′, and
O (oxygen radicals);
with the with the proviso that at least 50 mol % of the Y groups in the siloxane are R′, preferably methyl and there are at least two Z and/or Z′ groups in the siloxane.
Siloxane (I) can be comprised of Y
3
SiO-units, Y
2
SiO
2/2
-units, YSiO
3/2
-units and SiO
4/2
units wherein Y is as defined above. Preferable siloxane (I) is primarily comprises of Y
2
SiO
2/2
-units.
R′ groups may be exemplified by, but not limited to, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, and phenyl, preferably methyl.
Z groups may be exemplified by, but not limited to epoxy groups and chlorohydrin groups and mixtures thereof.
Z′ groups may be exemplified by, but not limited to, amine groups and hydroxyl groups.
F groups may be exemplified by, but not limited to, polyether groups, quaternary ammonium salt groups, monohydroxy alcohol groups, polyhydroxy alcohol groups, carbohydrate groups, acrylate groups, ester groups, amide groups, carbonate groups, carboxylate groups, sulfonate groups, sulfate groups, halogen groups, trialkoxysilyl groups, the following functional groups wherei

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