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Publication Date: 2003-May-02

Publishing Venue

The Prior Art Database

Related People

Griffin Lai: AUTHOR [+2]


A personal care product may be prepared using a resin identified herein as ATPA. The tertiary amide terminated polyamide may be prepared by reacting "x" equivalents of dicarboxylic acid wherein at least 50% of those equivalents are from polymerized fatty acid, "y" equivalents of diamine such as ethylene diamine, and "z" equivalents of a monofunctional reactant having a secondary amine group as the only reactive functionality. The stoichiometry of the reaction mixture is preferably such that 0.9 £ {x/(y+z)} £ 1.1 and 0.1 £ {z/(y+z)} £ 0.7.

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technical disclosure directed to:

Tertiary Amide-terminated polyamides
in personal care products


The present disclosure teaches how to make personal care products containing tertiary amide-terminated polyamides (ATPAs), and discloses many components that may be advantageously included in such a product.


Personal care products 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.  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 and aluminum-zirconium tetrachlorohydrex-Gly 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 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 needed 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, if at all, interfere with the appearance of the colorant.  However, in recent years consumers have demonstrated an increasing preference for transparent personal care products such as deodorants and shampoos.  There is thus an increasing demand for transparent materials which can provide the rheological properties needed for various personal care products, and particularly which can impart gel-like character to a formulation.

Polyamide resin prepared from polymerized fatty acid and diamine is reported to function as a gel...