Patent ID: 9080135
Filing Date: 2015-07-14
Classification: A61K,A61Q,C08F,C09K,C11D

Abstract:
1. A freeze thaw stable composition, comprising: a continuous phase comprising: a freeze thaw stability copolymer having a weight average molecular weight of greater than or equal to 30,000 grams per mole, water, and a surfactant, wherein the copolymer has the formula A.XXXII: wherein n, m, x, and y are sufficient to obtain the molecular weight of greater than or equal to 30,000 grams per mole; r is an integer from 10 to 40; i is an integer of from 15 to 30, and j is an integer of from 2 to 10, wherein the C 16-22 group of formula A.XXXII is linear, wherein at least a portion of the composition is a structured surfactant phase having an ordered structure; wherein based on 100 parts by weight of the composition: (a) about 2 to 14.8 parts by weight of total composition is at least one anionic surfactant, and (b) 0.2 to about 10 parts by weight of the composition is at least one surfactant selected from the group consisting of amphoteric surfactants, zwitterionic surfactants, non-ionic surfactants, and cationic surfactants, (c) electrolyte in an amount effective to, in combination with components (a) and (b) to provide the structured surfactant phase having the ordered structure comprising the multi-lamellar vesicle surfactant phase having an opaque visual appearance and exhibiting a yield strength of greater than 0 Pascals, wherein the electrolyte comprises NaCl; wherein the composition has wherein the composition has less than a 40% loss in initial viscosity after 3 freeze thaw cycles, the initial viscosity being at least 100 cp; the freeze thaw cycle comprising the steps of maintaining the composition for 12 hours at 25° C. and then 12 hours at −10° C. to result in a composition having a stable freeze thaw viscosity; the initial viscosity and the freeze thaw viscosity measured at a same RPM in the range of 50-100 rpm by a Brookfield viscometer using a RV4 spindle; wherein the weight ratio of the first monomeric unit to the second monomeric unit is 4:6, wherein the copolymer has 1-10 parts by weight said first monomeric unit, 1-10 parts by weight said second monomeric unit, 20-60 parts by weight said third monomeric unit, 25-70 parts by weight said fourth monomeric unit.