MXPA97006218A - Modifiers of reologia polimeri - Google Patents

Abstract

The present invention relates to the associative polymeric rheology modifier, based on acrylate prepared by polymerization of a C 1 -C 6 alkyl ester of acrylic acid and / or C 1 -C 6 alkyl ester of methacrylic acid, a monomer selected from a heterocyclic compound substituted with vinyl contains at least one of a nitrogen atom or sulfur atom, methacrylamide, a mono-or di-alkylamino of C1-C4-alkyl of C1-C4 and a methacrylamide of mono- or di-alkylamino of C1-C4-alkyl of C1-C4, and an associative monomer

Description

MODIFIERS OF POLYMERIC REOLOGY DESCRIPTION OF THE INVENTION The present invention is related to the associative polymeric rheology modifiers based on acrylates. Rheology modifiers are generally used to adjust or modify the rheological properties of aqueous compositions. Such properties include, without limitation, viscosity, flow rate, stability for viscosity change over time and the ability to suspend particles in such aqueous compositions. The particular type of modifier used will depend on the particular aqueous composition to be modified and the particular end use of the modified aqueous composition. Examples of conventional rheology modifiers include thickeners such as cellulose derivatives, polyvinyl alcohol, sodium polyacrylate and other water soluble macromolecules, and copolymer emulsions in which monomers with acidic groups have been introduced into the main chain. Another class of known rheology modifiers for aqueous compositions to be thickened is typically referred to associative modifiers. Such associative modifiers are reported in U.S. Patent Nos. 4,743,698, 4,600,761, RE 33,156, 4,792,343, 4,384,096, 3,657,175, 5,102,936 and 5,294,692. As noted, these "alkali-swellable" thickeners become effective upon the addition of bases, thereby raising the pH to alkaline of the thickened composition, but the thickeners do not thicken aqueous compositions having acidic pH. These types of thickeners are believed to be also compatible in systems containing cationic ingredients. Other rheology modifiers which are "activated" by the addition of an acid to the aqueous compositions which contain the modifiers have also been reported. As reported, the emulsions are prepared by means of emulsion polymerization of free radicals using colloidal stabilizers. The emulsions are mixed with the composition to be thickened and then the acid is added to the mixture, thus lowering the pH of the system from 6.5 to 0.5. These thickeners are reported to be effective in thickening certain aqueous acidic compositions, but they are not effective in thickening aqueous compositions having basic pH. It is desirable to develop a polymeric rheology modifier which can be advantageously used to thicken both the basic and acidic compositions. The present invention relates to a polymeric rheology modifier based on acrylates which has been prepared by polymerizing together from about 5 to about 80 weight percent of an acrylate monomer (a) selected from the group consisting of an alkyl ester of C - ^ - Cg of acrylic acid and an alkyl ester of C -, - Cg of methacrylic acid, from about 5 to about 80 weight percent of a monomer (b) selected from the group consisting of a heterocyclic compound substituted with vinyl contains at least one of a nitrogen atom or a sulfur atom, methacrylamide, a mono- or di-alkylamino methacrylate of C -, - C4 - C- | _-C4 alkyl and a mono- or dialkylamino methacrylamide of C1-C4-C1-C4 alkyl; and from about 0.1 to about 30 percent by weight of an associative monomer (c). The present invention relates to olimeric rheology modifiers (PRM), which have been prepared by polymerizing together from about 5 to about 80 weight percent of an acrylate monomer (a) selected from the group consisting of an alkyl ester of C- ^ -Cg of acrylic acid and an alkyl ester of Cj ^ -C of methacrylic acid, from about 5 to about 80 percent by weight of a monomer (b) selected from the group consisting of a heterocyclic compound substituted with vinyl containing at least less one of a nitrogen atom or a sulfur atom, methacrylamide, a mono- or di-alkylamino methacrylate of I 4 C -, - C4-C 1 -C 4 alkyl, and a C 1 -C 4 mono- or dialkylamino methacrylamide-C 1 -C 4 alkyl, and from about 0.1 to about 30 percent by weight of an associative monomer (c ), all percentages based on the total weight of a monomer used to prepare the PRM. The PRM can be used to thicken various compositions, including personal care compositions, adhesives, textile coatings, oil well sounding fluids and the like. The PRM can be incorporated into, for example, the personal care composition in various forms, including powder, solution, dispersion and emulsion. Conventional methods of preparing the acrylate-based polymers in the various forms are readily known to those skilled in the art of polymerization of acrylate-based polymers. Such methods include solution polymerization, precipitation polymerization and emulsion polymerization, for example. The PRM can be used to thicken aqueous personal care products such as creams and lotions and hair care products such as conditioners, shampoos, hair fixatives, gels, mousses, sprays and dyes. While the use of the PRMs of the present invention is particularly advantageous for thickening aqueous personal care compositions, the PRMs can also be used to thicken those personal care compositions which contain small amounts of water or do not have water. For example, in personal care compositions where there is no water or very little water is present, the PRM can be dissolved or dispersed in solvents in which the PRM is soluble or dispersible and which are conventionally used in personal care compositions. , and incorporated in the non-aqueous composition. The PRM can be dissolved or dispersed in the solvent both before the formulation, in which a solution or dispersion is added to the ingredients, or the PRM can be added in the form of a solid with others, formulation ingredients and the solvent , therefore producing the thick composition. The acrylate monomers are selected from the group consisting of esters prepared from acrylic acid and alcohols of C-j ^ -Cg, such as methyl, ethyl or propyl alcohol, and esters prepared from methacrylic acid and alcohols of C ^ Cg. Preferred acrylate monomers comprise alkyl esters of acrylic acid and acrylic acid. Even more preferred, the acrylate monomer is ethyl acrylate. From about 5 to about 80 percent by weight of the acrylate monomer is used in preparing the composition of the present invention, preferably from 15 to about 70 percent by weight, and is most preferably used, from about 40 to about 70 percent by weight of the acrylate monomer, all percentages based on the total weight of the monomer used to prepare the polymer. In addition to the acrylate ester, a monomer selected from the group consisting of a vinyl-substituted heterocyclic compound containing at least one of a nitrogen atom or a sulfur atom, methacrylamide, a mono- or di-methacrylate is polymerized therewith. -alkylamino of C1-C4-alkyl of CL-C4, a methacrylamide of mono- or di-alkylamino of C1-C4-alkyl of C -, - C4. Exemplary monomers include N, N-dimethylaminoethyl methacrylate (DMAEMA), N, N-diethylaminoethyl acrylate, N, N-diethylaminoethyl methacrylate, Nt-butylaminoethyl acrylate, Nt-butylaminoethyl methacrylate, N, N-dimethylaminopropyl acrylamide. , N, N-dimethylaminopropyl methacrylamide, N, N-diethylaminopropyl acrylamide and N, N-diethylaminopropyl methacrylamide. From about 5 to about 80 percent by weight of the monomer is used to prepare the modifiers of the present invention, preferably from about 10 to 70 percent by weight and more preferably, from about 20 to about 60 percent by weight of the monomers are used, all percentages based on the total weight of the monomer used to prepare the polymer.

An associative monomer is used in amounts that are "in the range of about 0.1 to about 30 percent by weight, based on the total weight of the monomer used to prepare the polymer, in combination with the acrylate monomer and the monomer (b) The associative monomers are preferably used at levels that are in the range of about 0.1 to about 10 weight percent Such monomers include those described in U.S. Patent Nos. 3,657,175, 4,384,096, 4,616,074, 4,743,698, 4,792,343, 5,011,978, 5,102,936, 5,294,692, Re. 33,156, the contents of all of which are incorporated herein as set forth in its entirety, and an allyl ether of the formula wherein R 'is hydrogen or methyl, A is propyleneoxy or butyleneoxy, B is ethyleneoxy, n is zero or an integer, m and p are zero or an integer less than n, and R is a hydrophobic group of at least 8 carbon atoms. Preferred associates include the urethane reaction products of a monoethylenically unsaturated isocyanate and nonionic surfactants comprising C-C4 alkoxy termini, 1,2-butylene oxide block copolymers and 1,2-ethylene oxide, as described in U.S. Patent 5,294,692 (Barron et al.); an ethylenically unsaturated copolymerizable surface-active monomer obtained by condensing a non-ionic surfactant with an α, β-ethylenically unsaturated carboxylic acid or the anhydride thereof, preferably a C3-C4 mono- or di-carboxylic acid or the anhydride thereof, more preferably a carboxylic acid or the anhydride thereof selected from the group consisting of acrylic acid, methacrylic acid, crotonic acid, maleic acid, maleic anhydride, itaconic acid and itaconic anhydride, as described in U.S. Patent 4,616,074 (Ruffner ); a surfactant monomer selected from the urea reaction product of a monoethylenically unsaturated monoisocyanate with a nonionic surfactant having amine functionality as described in U.S. Patent 5,011,978 (Barron et al.); and a non-ionic urethane monomer which is the reaction product of the urethane of a monohydric nonionic surfactant with a monoethylenically unsaturated monoisocyanate, preferably one of the deficient ester groups such as alpha, alpha-dimethyl-m-isocyanate -propenylbenzyl as described in the US Re. 33,156 (Shay et al.). Particularly the copolymerizable ethylenically unsaturated surfactant monomers are the preferred ones obtained by condensing a nonionic surfactant with itaconic acid. Methods for preparing such monomers are described in detail in several patents incorporated herein by reference.

Further, for the required and preferred monomers discussed above, the monomers which provide crosslinking in the polymer can also be used in relatively low amounts, up to about 2 percent by weight, based on the total weight of the monomer used to prepare the polymer. When used, the crosslinking monomers are preferably used at levels of about 0.1 to about 1 percent by weight. Crosslinking monomers include multivinyl substituted aromatic monomers, multivinyl substituted alicyclic monomers, difunctional phthalic acid esters, difunctional methacrylic acid esters, multifunctional acrylic acid esters, N-methylene-bis-acrylamide and multivinyl substituted aliphatic monomers, as dienes, trienes, and tetraenes. Exemplary crosslinking monomers include divinylbenzene, trivinylbenzene, 1,2,4-trivinylcyclohexane, 1,5-hexadiene, 1, 5, 9-decatriene, 1,9-dicadiene, 1,5-heptadiene, di-allyl phthalate, ethylene glycol dimethacrylate, polyethylene glycol dimethacrylate, penta- and tetra-acrylates, triallyl pentaerythritol, octalyl sucrose, cycloparaffins, cycloolefins and N-methylene-bis-acrylamide. Polyethylene glycol dimethacrylates are particularly preferred for thickening aqueous acidic compositions, since they tend to minimize haze.

Preferred PRMs in the form of an emulsion are prepared by forming an emulsion using one-step emulsion polymerization techniques. The monomer, water, free radical initiator, surfactants in amounts effective to disperse the polymer in the water under polymerization of the monomers, and from about 0.5 to about 20 weight percent of an alcohol selected from the group consisting of a monohydric alcohol linear or branched C2-C12 and a non-polymeric polyhydric alcohol, such as ethylene glycol, propylene glycol and glycerol, based on the total weight of the emulsion, are combined in a polymerization reactor and maintained at a desired temperature and for a period of time the which is effective to polymerize the monomers, whereby a polymeric emulsion comprising the copolymer of the monomers (a) and (b), water, surfactant and alcohol is formed. The contents of the polymerization vessel are preferably kept at a temperature and for a period of time effective to cause the polymerization of the monomers. Preferably, the polymerization reaction is initiated at about 30 degrees centigrade, with the contents of the polymerization vessel reaching a temperature of about 60 degrees centigrade. The reaction time will be from about 1 to about 6 hours. Someone skilled in the emulsion polymerization technique will be able to exactly exactly what temperature and time conditions are required, since both are within the knowledge of one skilled in the art. Preferably, about 1 to about 10 percent by weight of the alcohol is used, and more preferably, about 1 to about 5 percent by weight of the alcohol is used, based on the total weight of the emulsion. If alcohol is not used, or insufficient amounts of alcohol, in the preparation of emulsion, the resulting emulsion will not be stable for the change of viscosity over time. It is desirable to minimize the level of alcohol used. The maximum amount of alcohol used can be limited practically by factors such as cost, ability and environmental relationships of volatile organic compounds. Other factors can conceivably be used, amounts of alcohol in excess of 20 percent by weight. Where stable emulsions are required, it is essential that polymeric colloidal stabilizers such as polyvinyl alcohol will not be used during the preparation of the emulsion by means of emulsion polymerization in any amount in which the material alters the properties of the emulsion, particularly the stability of the emulsion. Preferably, no polymer colloidal stabilizer is used during the preparation of emulsion. It has surprisingly been found that the use of such polymeric colloidal stabilizers causes the emulsions to be unstable to changes in viscosity or phase separation over time. Therefore; the emulsions and rheology modifiers comprising the emulsions are essentially free and most preferably free of polymeric colloidal stabilizers. In personal care compositions based on water, water is a vehicle for application to some part of the body of a cosmetically active agent (CAA) that will have a cosmetic effect of some kind, in such a way that the effect is softening or cleansing or comforter or body enhancing effect. The personal care compositions may also include CAA combinations of various types, coloring agents, fragrances, preservatives and the like. The polymeric rheology modifier can be incorporated into the personal care composition at the time the composition is formulated or the PRM can be added later to a personal care composition once formulated. When incorporated during the preparation of personal care composition, the PRM can be combined with water or another solvent in which the PRM is soluble or dispersible, CAA and other ingredients as needed and / or desired, for example emulsifiers. When used in the form of a stable emulsion, the emulsion can be combined with the CAA and other ingredients under formulation, or the emulsion can be added later and mixed with compositions which have been previously formulated. Preferably, as little PRM is used as possible in the preparation of the personal care compositions of the present invention, with the minimum amount allowed which is an effective amount to thicken the personal care composition. The amount of PRM required to effectively thicken the personal care composition will depend on the particular polymer and the particular personal care composition. Typically the thick personal care composition will contain from about 0.1 to about 10 percent by dry weight of the PRM, based on the total weight of the thick personal care composition. Preferably, the thick personal care composition will contain from about 0.5 to about 5 percent by dry weight of the PRM. PRMs meet a number of needs of formulators of personal care products, such as compatibility with cationic ingredients, thickening efficiency, transparency in gels, pH versatility (ie, ability to thicken over a wide range of acid-alkaline pH ) and salt tolerance. A number of examples detailing the personal care compositions that make use of the PRMs of the present invention have been evaluated and are summarized in the following. These examples include both hair care and skin care applications, since PRMs seem to offer benefits in both areas. The following examples are indicated to exemplify the invention and should not be used to limit the scope of the invention, which scope is set forth in the claims appended hereto. Two PRMs of the present invention are prepared by the emulsion polymerization methods described hereinbefore. These PRMs are designated by PRM IB and ÍC, respectively. The monomer composition for each PRM is set forth in Table 1. Table 1 monomers (1) IB IC ethyl acrylate 57 60 38 37 dimethylaminoethyl methacrylate associative monomer 5 (2) 3 ^ 3) (1) = All values are in percent by weight, based on the total weight of the monomer used to prepare the PRM (2) = ceteth-20 itaconate (3) = ceteth-20 ally ether The thickening efficiency of each PRM is evaluated by measuring the viscosity formation in prototype personal care formulations. Viscosity is measured using a Brookfield RVF heliopath viscometer at 10 rpm. All viscosity values are reported in units of centipoise (cps). The initial viscosity measurements are taken after the personal care compositions are formulated and allowed to equilibrate under ambient temperature and pressure for 24 hours. The viscosities are measured on day eight and / or seven, 8 or 7 days, respectively, after the initial viscosity is measured. In all cases, the viscosities of the formulations containing the PRM are compared to the viscosities of a control which does not contain PRM. The formulations are evaluated in detail in Formulations 1 to 9, below. Evaluations are also conducted in model systems to determine bleach stability, for example, peroxide. The peroxide stability is determined by boiling 1% solids, 6% H202 solution (pH adjusted to 3 using H3P04) for a total of 20 hours. The results are reported as the% of H2? 2 retained. Results and Discussion PRMs are useful in a wide range of personal care products. The examples shown here highlight its effectiveness in the formation of viscosity in various formulations, which include alpha hydroxy cationic acid (AHA) creams, antiperspirant lotions, hair conditioners, especially shampoos, hair and skin gels, and hair dyes. All PRM evaluated are effective in increasing the viscosity of personal care prototypes in hair and skin care systems. AHA creams The execution of the PRM in the AHA cream established in Formulation 1 is evaluated. This emulsion is low in pH and contains cationic surfactants. PRMs surprisingly exhibit both cationic compatibility and acid thickening. The results are set forth in Table 2. Table2 (1) and (2): the PRM IB is tested against a control, while the PRM ÍC is tested at a later time against a second, but similar, control independently of the PRM IB. As it is clearly observed, the addition of only 0. 5% -in PRM solids is effective in raising the viscosity of a cationic AHA cream compared to a non-PRM cream. Antiperspirant Lotion The performance of each PRM is evaluated in the aqueous antiperspirant lotion set forth in Formulation 2. This low pH emulsion contains a high level of electrolyte such as aluminum hydrochloride. Therefore, PRM exhibits salt tolerance as well as viscosity formation at low pH. The results are set forth in Table 3. Table 3 (1) and (2): the PRM IB is tested against a control, while the PRM ÍC is tested at a later time against a second, but similar, control independently of the PRM IB. The control ^ forms a non-stable emulsion, ie there is phase separation, which avoids the determination of a viscosity for the control formulation. As clearly seen, only 1.0% solids of the associative PRM is effective to significantly increase the viscosity of an aqueous, antiperspirant lotion having high amounts of salt compared to a product without the PRM. Hair Conditioner The PRM IB is evaluated in the unrinsed hair conditioner set forth in Formulation 3. This formulation contains a high load of polymeric and monomeric conditioning agents. The excellent viscosity formation shown in Table 4 not expected, exhibits the surprising ability of PRM to form the viscosity of aqueous, cationic formulations at a 2% solids level. Table 4 Shampoos The PRM is formulated in the prototype conditioning shampoo set forth in Formulation 4. As noted in Table 5, the PRM IB is effective in forming the viscosity of the shampoo after mixing. In this way, the PRM is shown to allow the viscosity value of the highly concentrated surfactant system.

Table 5 Additional work is done to demonstrate the ability of PRMs to form the viscosity of highly concentrated surfactant systems. The PRMs are then added to the aqueous emulsion of 20% polymer solids to three commercial shampoos which are sold and evaluated. Shampoos include the soft baby shampoo available from Johnson & Johnson, RaveR moisturizing shampoo available from Chesebrough-Pond's USA Company and Prell® shampoo available from Procter and Gamble. The ingredients in these products, as reported on the label, are listed in Formulations 5, 6 and 7. While the exact levels of use of the particular ingredients contained in the respective commercial shampoos may be proprietary, the ranges of the levels of such ingredients used by those skilled in the art are conventional and known to those skilled in the art of formulating personal care compositions. As observed in the results reported in Table 6, the PRM are effective to set the viscosity in all cases. Table 6 Gels Clarity is an important attribute for many hair and skin care gels. Using existing thickening technology, low pH lotions or conditioning gels with adequate viscosity typically can not be clear because commercial clear thickeners are incompatible with cationic or low pH agents, and emulsions are necessary. PRM IB and ÍC are used to thicken two transparent AHA gels, as set out in Formulation 9, one of which contains an additional conditioner (policuaternio-4) and one of which does not. The viscosity results, which are shown in the Table 7, show that PRM efficiently form the viscosity of transparent gels. Table 7 (1 and 2); PRM IB and ÍC are independently tested separately, but with similar controls. Hair Dyes Hair dye systems are typically highly alkaline during use. It is found that the PRM is effective for the viscosity formation of a two-component permanent hair dye after the two components are mixed. This is true when the polymer is supplied in the acid developer or alkaline paint base. The results are set forth in Table 8 which clearly shows that the PRM IB is effective in increasing the viscosity of commercial hair dye named Nice'n EasyR which is a product available from Clairol Inc., the composition of which is established in the Formulation 9. Table 8 (1 and 2); PRM IB and ÍC are tested independent against each other against separate controls. Perioxide Stability Compatibility with hydrogen peroxide can be an important attribute in certain personal care applications, such as hair dye. A standard discrimination test for peroxide compatibility is a boil test at 20 hours. The peroxide concentration is measured before the boiling rate at 20 hours. The retention time of more than 92% of the initial peroxide concentration is usually indicative of a product which will exhibit satisfactory coating stability. The PRM IB is evaluated in such a test with 1% solids using 6% hydrogen peroxide, with the pH adjusted to 3 with H3P04. The results are summarized in Table 9. Table 9 PRM% of retained peroxide 1B 99 These results show that the PRM exhibits excellent peroxide compatibility. PRMs promise a lot in personal care applications. They raise the viscosity in the presence of such common personal care ingredients such as cationic agents, acids, bases, salts and surfactants. The viscosities of such various formulations for hair and skin such as creams, lotions, antiperspirants, hair conditioners, especially shampoos, mousses, hair and skin gels, and hair dyes are relatively high at low concentrations of these polymers. In addition, behaviors of interest for personal care, such as pseudoplastic flow, are evident with these polymers.

Formulation 1 AHA Lotion Cationic ingredient% by weight PRM 0.50 (solids) propylene glycol 2.00 Nata EDTA (39%) 0.25 octyl methoxycinnamate 4.00 lapyrium chloride 0.50 stearal chloride 0.50 cetearyl alcohol 2.00 glyceryl stearate / glycerin 3.00 cyclomethicone 4.00 dimethicone 1.00 myristate isopropyl 2.00 glycolic acid (70%) 4.29 water at 100% Formulation 2 Lotion Antiperspirant Aqueous ingredient% by weight PRM 1.00 (solid) propylene glycol 4.00 aluminum hydrochloride (50%) 42.00 glyceryl stearate / PEG-100 stearate 3.00 cetearyl alcohol 0.75 glyceryl stearate / glycerin 1.50 cyclomethicone 2.00 water at 100% Formulation 3 Hair Conditioner removed by rinsing ingredient% by weight PRM • 2.00 (solids) polyquaternium-10 0.50 glycerin 2.00 laneth-15 1.00 cetearyl alcohol 2.50 mineral oil 2.00 cetyl acetate / alcohol with acetylated lanolin 1.00 cetrimonium chloride (25%) 4.00 citric acid (20%) at pH 4 water a 100% Formulation 4 Shampoo Conditioner ingredient% by weight PRM 2.00 (solid) polyquaternium-10 0.75 sodium lauryl sulfate (29%) 17.00 sodium laureth sulfate (26%) 13.00 cocamidopropyl betaine (35%) 2.50 cocamide DEA 4.50 ethylene glycol distearate 1.25 steareth-20 0.30 dimethicone 3.00 citric acid at pH 6 water at 100% Formulation 5 Shampoo for Baby Johnson & Johnson ingredient% by weight PRM 2.50 (solids) Water Laurato sorbitan PEG-80 Cocamidopropyl betaine Trideceth sulfate sodium Glycerin Lauroanfoglycinate Distearate PEG-150 Laureth-13 sodium carboxylate Fragrance Polyquaternium-10 Tetrasodium EDTA Quaternium-15 Citric acid Yellow D & C # 10 Orange D &D # 4 Formulation 6 RaveR Moisturizing Shampoo ingredient% by weight PRM 2.50 (solids) Water Lauryl sodium sulfate Cocamidopropyl betaine Sodium chloride Polyquaternium-10 Glycerin Polyquaternium-7 Oleth-3 phosphate Fragrance BHT Tetrasodium EDTA Hydantoin DMDM Iodopropynyl Butylcarbamate Red 33 Yellow 5 Formulation 7 PrellR Shampoo ingredient% by weight PRM 2.50 (solids) Water Laureth Ammonium Sulfate Ammonium Lauryl Sulfate Cocamide DEA Ammonium Xylene Disulfonate Sodium Phosphate Fragrance Disodium Phosphate Sodium Chloride EDTA Benzophenone-2 Methylchloroisothiazolinone Methylisothiazolinone Green D &C No. 8 Blue FD &C No. 1 Formulation 8 ingredient% by weight% by weight weight% by weight glycolic acid (70%) 4.29 4.29 4.29 PRM 3.00 3.00 polyquaternium-4 0.50 water at 100% to 100% Formulation 9 Dye ingredients Nice'n EasyR Natural Dark Coffee # 120 ingredient% by weight PRM 3.0 (solids) Dye base water oleic acid propylene glycol isopropyl alcohol nonoxynol-2 nonoxynol-4 ethoxydiglycol ammonium hydroxide cocamide DEA hydrogenated tallow amine PEG-8 sulphated castor oil sodium sulfite erythorbic acid fragrance EDTA resorcinol p-phenylenediamine 1-naphthol sulphate N, N-bie (2-hydroxyethyl) -p-phenylenediamine Developer water hydrogen peroxide nonoxynol-9 nonoxynol-4 phosphoric acid cetyl alcohol stearyl alcohol

Claims (5)

1. CLAIMS 1. A polymeric rheology modifier, characterized in that the polymeric rheology modifier is prepared by polymerization of monomers selected from the group consisting of from 5 to 80 weight percent of an acrylate monomer (a) selected from the group consisting of an alkyl ester of C- ^ Cg of acrylic acid and an alkyl ester of C-, - Cg of methacrylic acid, from 5 to 80 weight percent of a monomer (b) selected from the group consisting of a heterocyclic compound substituted with vinyl contains at least one of a nitrogen atom or sulfur atom, methacrylamide, a mono- or di-alkylamino methacrylate of c? "C4-C1-C4 alkyl and a C1- C4 mono- or dialkylamino methacrylamide - C1-C4 alkyl, and from 0.1 to 30 percent by weight of an associative monomer (c), all percentages based on the total weight of monomer used to prepare the polymeric rheology modifier
2. 2. The polymer rheology modifier according to claim 1, characterized in that the associative monomer (c) is selected from the group consisting of the reaction products of the urethane of a monoethylenically unsaturated isocyanate and nonionic surfactants comprising alkoxy termini of c? c4 'blocks of copolymers of 1,2-butylene oxide and 1,2-ethylene oxide, a copolymerizable ethylenically unsaturated surfactant monomer obtained by condensing a nonionic surfactant with a α, β-ethylenically unsaturated carboxylic acid or the anhydride thereof, a monomer of surfactant selected from the reaction product of the urea of a monoethylenically unsaturated monoisocyanate with a nonionic surfactant having amine functionality, an allyl ether of the formula where R 'is hydrogen or methyl, A is propyleneoxy or butyleneoxy, B is ethyleneoxy, n is zero or an integer, m and p are zero or an integer less than n, and R is a hydrophobic group of at least 8 carbon atoms. carbon, and a non-ionic urethane monomer which is the reaction product of the urethane of a monohydric nonionic surfactant with a monoethylenically unsaturated isocyanate.
3. 3. The polymeric rheology modifier according to claim 1, characterized in that it is prepared with 0.1 to 10 weight percent of the associative monomer (c).
4. 4. The polymeric rheology modifier according to claim 1, characterized in that the monomer (b) is selected from the group consisting of N, N-dimethylaminoethyl methacrylate, N, N-diethylaminoethyl acrylate, N, N-methacrylate. diethylaminoethyl, Nt-butylaminoethyl acrylate, Nt-butylaminoethyl methacrylate, N, N-dimethylaminopropyl acrylamide, N, N-dimethylaminopropyl methacrylamide, N, N-diethylaminopropyl acrylamide and N, N-diethylaminopropyl methacrylamide.
5. 5. The polymeric rheology modifier according to claim 5, characterized in that the associative monomer (c) is selected from the group consisting of the urethane reaction products of a monoethylenically unsaturated isocyanate and non-ionic surfactants comprising alkoxy terminates. C- ^ C ^ block copolymers of 1,2-butylene oxide and 1,2-ethylene oxide, a copolymerizable ethylenically unsaturated surfactant monomer, obtained by condensing a nonionic surfactant with a α, β-ethylenically unsaturated carboxylic acid or the anhydride thereof, a surfactant monomer selected from the reaction product of the urea of a monoethylenically unsaturated monoisocyanate with a nonionic surfactant having amine functionality, an allyl ether of the formula CH2 = CR, CH2OAtnBnApR where R1 is hydrogen or methyl, A is propyleneoxy or butyleneoxy, B is ethyleneoxy, n is zero or an integer, m and p are zero or a number between ro less than n, and R is a hydrophobic group of at least 8 carbon atoms, and a non-ionic urethane monomer which is the reaction product of the urethane of a monohydric nonionic surfactant with a monoethylenically unsaturated isocyanate.