Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From silicon reactant having at least one...
Reexamination Certificate
2003-03-25
2004-08-17
Moore, Margaret G. (Department: 1712)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From silicon reactant having at least one...
C556S428000, C528S029000, C528S033000, C528S040000
Reexamination Certificate
active
06777521
ABSTRACT:
BACKGROUND OF THE INVENTION
Field of Invention
The present invention relates to a (a) novel silicone sulfate, (b) a method for preparation of said sulfate and (c) application of said sulfate in industrial and personal care applications.
The compounds of the present invention are made by reacting certain epoxy containing silicone compounds and a sodium sulfate under aqueous conditions. The resulting compound is quite stable and offers excellent foaming properties and is substantive to glass and porcelain. In addition, compounds of the present invention may also contain a pendant hydroxyl group, which alters the water solubility and emulsification properties of the compound. In a preferred embodiment the hydroxy containing group may also contain a polyoxyethylene group and a polyoxypropylene group. The ability to regulate the type of polyoxyalkylene group and amount present ill the silicone polymer results in a series of products ranging widely in water/oil solubility. The technology used to produce the compounds of the present invention is very flexible and allows us to prepare performance tailored molecules for specific applications.
Object of the Invention
It is the object of the present invention to sulfated silicone polymers that have low color, low odor, and produce high levels of copious foam in aqueous systems.
Description of the Arts and Practices
U.S. Pat. No. 4,960,845 October 1990, incorporated herein by reference, to O' Lenick, Jr. discloses the preparation dimethicone copolyol sulfates. The compounds of this technology are prepared by reacting a hydroxy containing silicone with a sulfating reagent, like sulfur trioxide. While the products are interesting there are several drawbacks. Firstly, the reaction with the aggressive sulfation reactant gives a product with dark color and mal odor. Secondly, we have discovered that there is functional improvement to be had by having a free hydroxyl group present in the molecule. This group improves wetting and solubilization.
The Invention
SUMMARY OF THE INVENTION
The compounds of the present invention are made by reacting certain epoxy containing silicone compounds and sodium sulfate under aqueous conditions. The resulting compound is quite stable and offers excellent foaming properties. In addition compounds of the present invention may also contain a pendant hydroxyl group, which alters the water solubility and emulsification properties of the compound. In a preffered embodiment the hydroxy containing group may also contain a polyoxyethylene group and a polyoxypropylene group. The ability to regulate the type of polyoxyalkylene group and amount present in the silicone polymer results in a series of products ranging widely in water/oil solubility. The technology used to produce the compounds of the present invention is very flexible and allows us to prepare performance tailored molecules for specific applications.
REFERENCES:
patent: 3278465 (1966-10-01), Twitchett et al.
patent: 3507897 (1970-04-01), Pike
patent: 3531417 (1970-09-01), Morehouse
patent: 3707492 (1972-12-01), Morehouse
patent: 3957658 (1976-05-01), Chiesa et al.
patent: 4895917 (1990-01-01), Gruning
patent: 4960845 (1990-10-01), O'Lencik
patent: 5281687 (1994-01-01), Busch et al.
Zhou et al. “Cation transport polymer electrolytes. Siloxane comb polymers with pendant oligo-oxyethylene chains and sulphonate groups”. Polymer Communications, 1989, vol. 30, pp. 52-55.
Moore Margaret G.
Siltech LLC
LandOfFree
Silicone sulfate polymers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Silicone sulfate polymers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Silicone sulfate polymers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3361614