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Publication Date: 2003-May-14

Publishing Venue

The Prior Art Database

Related People

Griffin Lai: AUTHOR [+2]


A block copolymer of the formula hydrocarbon-polyether-polyamide-polyether-hydrocarbon is described. The copolymer may be prepared by reacting together reactants that include dimer acid, diamine, and a polyether having both hydrocarbon termination and termination selected from one of amine, hydroxyl and carboxyl. The copolymer may be combined with a polar liquid to form a gel, where the gel may be transparent and may be incorporated into household and consumer products including antiperspirants. The copolymer may be formulated as a personal care product.

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hydrocarbon-terminated polyether-polyamide block COPOLYMERS in personal care and other products

Background of the DISCLOSURE

Field of the Disclosure

This disclosure generally relates to organic resins, more particularly to resins having an internal structure comprised of polyamide and polyether, and terminal structure comprised of hydrocarbon.� The disclosure also relates to the preparation of these resins, and their use as, for example, components of personal care products.

Description of the Related Art

In many commercially important compositions, the consistency of the product is critical to its commercial success.� One example is personal care products, which generally contain one or more active ingredients within a carrier formulation.� While the active ingredient(s) determine the ultimate performance properties of the product, the carrier formulation is equally critical to the commercial success of the product in that it largely determines the consistency of the product.� The rheology of the carrier (also referred to as the “base”) largely determines the flow properties of the product, and the flow properties largely determine the manner in which the consumer will apply or use the product.

For example, aluminum chlorohydrate, aluminum-zirconium tetrachlorohydrate, aluminum-zirconium polychlorohydrate complexed with glycine, and aluminum-zirconium complexed with any of trichlorohydrate, octachlorohydrate, and sesquichlorohydrate are metal salts that are commonly used as active ingredients in deodorant and antiperspirant products.� Consumers have shown a preference for applying deodorant from a stick form.� Thus, the carrier in a stick-form deodorant must be a relatively hard substance, and waxy fatty alcohol such as stearyl alcohol has often been used as the carrier in these products.� As another example, the active ingredient in a lipstick is the colorant.� A lipstick should not be as hard as a stick deodorant, but of course must maintain its shape when undisturbed at room temperature.� A blend of wax and oil is known to provide a consistency that is well suited as a carrier for a lipstick.� As a final example, shampoo desirably has a viscosity greater than water, and when the active ingredient(s) in a shampoo does not have a sufficiently high viscosity, a somewhat viscous carrier material is desirably included in the shampoo formulation.

From the above examples, it is seen that formulators of personal care products depend upon the availability of materials having various rheological properties, in order to formulate a successful personal care product.� Materials which have a gel-like character, in that they maintain their shape when undisturbed but flow upon being rubbed, are often desired for personal care products.

Transparent (i.e., clear) carriers are desired by formulators who develop a personal care product wherein colorant is an active ingredient, because a transparent carrier (as opposed to an opaque carrier) will minimally...