Antiperspirant or deodorant compositions
AssigneeConopco, Inc., d/b/a UNILEVER
InventorsMartin Cropper, Kevin Franklin
Life of this patent
Estimating the term…
Abstract
Segregation of antiperspirant actives suspended in anhydrous compositions employing ester oils or non-volatile silicone oils having a refractive index of at least 1.5, preferably together with an alcohol oil, gelled with a fibre-forming amide gellant can be inhibited by including a segregation inhibitor, especially an arylene-alkylene block copolymer, such as a tri-block copolymer e.g. a styrene/ethylenebutylene/styrene copolymer or a styrene/butylene copolymer.
Claims51
An anhydrous antiperspirant or deodorant composition comprising:
- a) from 1 to 35% by weight of an antiperspirant active comprising a particulate astringent aluminium and/or zirconium salt having a refractive index of from 1.49 to 1.57 at 22° C. of which preferably less than 60% by weight of its particles have a diameter of up to 10 μm;
- b) from 30 to 90% by weight of a water-immiscible carrier fluid in which said antiperspirant active is suspended having a refractive index of at least 1.50 at 22° C. that is matched within 0.01 refractive index units of the antiperspirant active and comprising a non-volatile silicone oil and/or an aromatic ester oil;
- c) a fibre-forming amide gallant for said carrier fluid and d) a segregation inhibitor in a weight ratio to said fibre-forming amide gallant of at least 1:1.
A method of reducing sedimentation in a process for making a solid antiperspirant composition comprising the steps of
- Dissolving an amide gallant in a carrier fluid having a refractive index of at least 1.50 at 22° C. that is matched within 0.01 refractive index units of the antiperspirant active and comprising a non-volatile silicone oil and/or an aromatic ester oil at an elevated temperature;
- Mixing the carrier fluid with a particulate antiperspirant active either before or after or during dissolution of the amide gallant;
- Cooling the composition containing the dissolved amide gallant and whilst the composition is still mobile filling a dispensing container or mould in which a segregation inhibitor is dissolved in the carrier fluid before the composition is filled into the dispensing container or mould.
An anhydrous antiperspirant or deodorant composition which comprises
- a) from 1 to 35% by weight of an antiperspirant active comprising a particulate astringent aluminium and/or zirconium salt having a refractive index of from 1.49 to 1.57 at 22° C., preferably of which less than 60% by weight of its particles have a diameter of up to 10 μm;
- b) from 30 to 90% by weight of a water-immiscible carrier fluid in which said antiperspirant active is suspended comprising 2-ethylphenyl venzoate and
- c) a fibre-forming amide gallant for said carrier fluid.
Dependencies are inferred from the claim text.