A method for preparing a siloxane polymer comprising the steps of (a) providing an aldehyde-based redox initiator; and (b) reacting said redox initiator with a siloxane having a plurality of end-capped hydride moieties to form a siloxane polymer having a plurality of terminal aldehyde moieties.
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What is claimed is: 1. A method for preparing a siloxane polymer comprising the steps of: (a) providing at least one redox initiator having the formula: wherein: Z is an aldehyde; X is an abstraction moiety selected from the group consisting of hydrogen, chloride, bromide, and iodide; R1 is a s
What is claimed is: 1. A method for preparing a siloxane polymer comprising the steps of: (a) providing at least one redox initiator having the formula: wherein: Z is an aldehyde; X is an abstraction moiety selected from the group consisting of hydrogen, chloride, bromide, and iodide; R1 is a stabilizing constituent selected from the group consisting of alkyl and aryl; and A is a C2-C6 alkene or a C2-C6 alkyne; and (b) reacting said redox initiator with a hydride end-capped siloxane to form a siloxane polymer having a plurality of terminal aldehyde moieties. 2. The method of claim 1 wherein R1 is selected from the group consisting of phenyl, methyl, and ethyl. 3. The method of claim 2 wherein R1 is phenyl. 4. The method of claim 1 wherein X is hydrogen. 5. The method of claim 1 wherein A is selected from the group consisting of 2-vinyl, 3-allyl, or 4-butenyl. 6. The method of claim 1 wherein said redox initiator is selected from the group consisting of 2-phenyl-4-pentenal and 2-phenyl-2-bromo-4-pentenal. 7. The method of claim 1 wherein said redox initiator has the formula: wherein x is 1 or 2. 8. The method of claim 1 wherein said siloxane has the formula: wherein R7 is hydrogen; R8 is independently selected from the group consisting of hydrogen, C1-C50 straight or branched alkyl, C3-C12 substituted or unsubstituted cyclic, C1-C11 heterocyclic, C6-C8 aryl, C6-C8 aryloxy, C1-C12 alkoxy, C2-C12 di-alkylamino, C1-C12alkylthio, C1-C12 fluoroalkyl, C1-C12 epoxy, C1-C6 acrylic or methacryoxy, C6-C50 polyether, or some combination thereof; R9 is a moiety having the formula provided that at least one R8 of this moiety is hydrogen; and p is an integer from 3 to 40. 9. The method of claim 1, wherein said siloxane has a formula of: wherein R16 and R17 are independently methyl, ethyl, or phenyl, x is an integer from 0-80, y is an integer from 0-80, and x+y≠0. 10. The method of claim 1 wherein said reacting step comprises a hydrosilylation process. 11. The method of claim 10 wherein said hydrosilylation process occurs in the presence of a platinum catalyst. 12. A method of producing a copolymer comprising the steps of: (a) providing at least one redox initiator having the formula: wherein: Z is an aldehyde having carboxyl and carbinol functionalities; X is an abstraction moiety; R1 is a stabilizing constituent; and A is a C2-C6 alkene or a C2-C6 alkyne; (b) reacting said redox initiator with a hydride end-capped siloxane to form a siloxane polymer having a plurality of terminal aldehyde moieties; (c) providing a monomer or polymer having a vinyl functional group and a second functional group; and (d) reacting said siloxane polymer with said monomer or polymer to produce a copolymer having aldehyde functionality and said second functionality. 13. The method of claim 12 wherein said vinyl compound is selected from the group consisting of ethylene, propylene, styrene, N-vinyl pryrrolidone, vinylidene fluoride, chloroflouoroethylene, methyl methacrylate, ethyl methacrylate, acrylonitrile, hydroxyethyl methacrylate, vinyl acetate, maleic anhydride, 3,3,3-trifluoro-1-propene, 2,3,3,3-tetrafluoro-1-propene, 1,3,3,3-tetrafluoro-1-propene, 1-chloro-1,3,3,3-tetrafluoro-1-propene, 1,1,3,3,3-pentafluoro-1-propene, and 4-vinyl-pyridine. 14. The method of claim 12 wherein said copolymer is a block copolymer or a graft copolymer. 15. The method of claim 12 wherein said copolymer comprising at least one functionality selected from the group consisting of acrylates, polyolefins, acylate-vinylpyrrolidones, fluorinated organic, and styrenyl. 16. A siloxane polymer comprising a plurality of moieties having the structure: wherein; x′ is an integer from 2 to 6; R1 is methyl, ethyl, or phenyl; and R8 is independently selected from the group consisting of hydrogen, C1-C50 straight or branched alkyl, C3-C12 substituted or unsubstituted cyclic, C1-C11 heterocyclic, C6-C8 aryl, C6-C8 aryloxy, C1-C12 alkoxy, C2-C12 di-alkylamino, C1-C12 alkylthio, C1-C12 fluoroalkyl, C1-C12 epoxy, C1-C6 acrylic or methacryoxy, and C6-C50 polyether, or some combination thereof. 17. The polymer of claim 16 wherein R1 is phenyl. 18. The polymer of claim 17 wherein R8 is methyl or phenyl. 19. The polymer of claim 18 wherein R8 is methyl. 20. The polymer of claim 17 wherein X is hydrogen. 21. A personal care product comprising a siloxane polymer of claim 16. 22. The personal care product of claim 21 wherein said siloxane polymer is present in an amount effective to produce a tactile impression. 23. A method of delivering an active ingredient to a bodily surface comprising the step of suspending said active ingredient in a siloxane polymer according to claim 16. 24. The method of claim 23 wherein said suspension step involves carrying or encapsulating said active ingredient in said siloxane polymer. 25. The method of claim 23 wherein said active ingredient is biologically active. 26. The method of claim 23 wherein said active ingredient is cosmetically active. 27. The method of claim 23 wherein said active ingredient is selected from the group consisting of sugars, polysaccharides, proteins, peptides, amino acids, and vitamins. 28. The method of claim 23 wherein said bodily surface is the surface of skin, nail, or hair. 29. A copolymer comprising a siloxane unit having the structure of: wherein; x′ is an integer from 2 to 6; R1 is methyl, ethyl, or phenyl; and R8 is independently selected from the group consisting of hydrogen, C1-C50 straight or branched alkyl, C3-C12 substituted or unsubstituted cyclic, C1-C11 heterocyclic, C6-C8 aryl, C6-C8 aryloxy, C1-C12 alkoxy, C2-C12 di-alkylamino, C1-C12 alkylthio, C1-C12 fluoroalkyl, C1-C12 epoxy, C1-C6 acrylic or methacryoxy, C6-C50 polyether, or some combination thereof; and a second monomer or unit having a different structure. 30. The copolymer of claim 29 wherein said second monomer or unit is selected from the group consisting of sugars, saccharides, and polysaccharides. 31. A personal care product comprising a copolymer of claim 30. 32. The personal care product of claim 31 wherein said copolymer is as a cationic or anionic surfactant, foam control agent, surface modifier, rheology modifier, lubricant, film former, or adhesive.
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이 특허에 인용된 특허 (6)
Osborne, Scott Edward; Deckner, George Endel; Klofta, Thomas James; Vega, Victor Nicholas, Compositions for efficient release of active ingredients.
Kumar Kanta (Maplewood MN) Kumar Ramesh C. (Maplewood MN) Mitra Smarajit (West St. Paul MN), Vinyl-silicone polymers in cosmetics and personal care products.
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