FI89938C - Creamy abrasive cleaners - Google Patents

Description

χ 89938

This invention relates to stable, viscous, abrasive-containing abrasive compositions having excellent cleaning performance, easy rinsability and excellent polishing ability, but which do not aggressively affect surfaces to be cleaned or packaging materials.

These compositions are substantially free of terpene-10 solvents and contain a well-defined solvent derived from propylene glycol.

It is well known to prepare detergent compositions in liquid or cream form which contain solvents.

Cream-like cleaning compositions comprising an abrasive and a binary solvent system consisting of terpenes and polar solvents are specifically disclosed in European Patent Application EP 0,126,545, published November 28, 1984.

In these compositions, terpenes exhibit both cleaning properties and desirable emulsifying properties that improve the viscosity of the product.

However, it has become desirable to replace terpenes with solvents that are fully compatible with all types of surfaces and packaging materials to be cleaned by them and that are present at the same time. . show good cleaning and emulsifying properties.

It has now been realized that viscous, terpene solvent-free, cream-like, han-3q formulas of detergent compositions can be prepared which exhibit considerable cleaning performance, ease of rinsing and surface suitability, containing compositions containing a well-defined propylene glycol-derived solvent.

U.S. Patent No. 2,89938,591 discloses the use of solvents of this type in liquid hard surface cleaning compositions that do not contain an abrasive. EP-A 0 040 882 mentions the use of solvents derived from propylene glycol in combination with terpenes and benzyl alcohols in liquid hard surface cleaners which do not contain an abrasive.

It is an object of the present invention to provide viscous, cream-like cleaning compositions that are fully compatible with the surfaces and packaging materials to be cleaned thereon. It is a further object of the present invention to provide a purified composition having excellent cleaning ability, easy rinsing and excellent polishing power.

The present invention relates to a viscous, creamy, abrasive cleaning agent which is substantially free of terpene solvents and which contains a surfactant, an abrasive and an organic solvent and, if desired, conventional additives, and is characterized in that it is free of terpenic solvents or contains not more than 2% of them and that the organic solvent is represented by the formula: CH,

I J

RO (CH-CHO) H

2 "wherein R is a C 1 -C 6 alkyl, alkenyl or alkylaryl group, preferably a C 1 -C 4 alkyl group, and n is an integer from 1 to 4, preferably 1 or 2, and that the abrasive Mohs hardness of 7 or less.

3q Surfactants, abrasives, solvents and possible ingredients are described in more detail below.

Unless otherwise stated,% data means% by weight.

35 Water-soluble detersive surfactants useful herein include well-known synthetic, anionic, non-ionizable, amphoteric and dual-ionizable surfactants and mixtures thereof. Typical of these are alkylbenzene sulfates and 5-sulfonates, paraffin sulfonates, olefin sulfonates, alkoxylated (especially ethoxylated) alcohols and alkylphenols, amine oxides, sulfonates of fatty acids and fatty acid esters, and the like, which are well known in the art. Such cleansing IQ surfactants generally contain an alkyl group of the type cio 'cl8' ani ° nis: * - a 'cleansing surfactants are most commonly used in the form of their sodium, potassium or triethanolammonium salts. The nonionic substances generally contain from 3 to 17 ethylene oxide groups per mole of hydrophobic moiety. Particularly preferred in the compositions of the present invention are: alkyl benzene sulfonates, C 2 -C 20 paraffin sulfonates and ethoxylated alcohols of the formula RO (CH 2 CH 2 O) n H, wherein R is a C 12 -C 15 alkyl chain and n is an integer from 6 to 10.

Anionic surfactants are often present in 0.3-8%, preferably 2-4% of the composition. Non-ionizable surfactants are used in an amount of 0.1-6% by weight of the composition. Mixtures of such surfactants may also be used. The total amount of surfactant is preferably 3-5%.

I. Abrasives - The types of abrasives used herein are selected from water-insoluble, non-sharp-edged materials that are well known in the literature due to their relatively mild abrasive properties. It is highly preferred that the abrasives used herein are not undesirably "scratchy." Abrasives having a Mohs hardness of about 7 or less are typically used; abrasives with a Mohs1 hardness of 3 or less can be used to avoid the formation of scratches on polished aluminum or stainless steel surfaces. Suitable abrasives in this connection are inorganic materials, in particular substances such as calcium carbonate and diatomaceous earth, as well as substances such as sparkling clay, magnesium carbonate, kaolin, attapulgite, calcium hydroxyapatite, calcium orthophosphate, dolomite and the like. The above inorganic substances can be classified as "hard abrasives". Synthetic organic abrasives such as urea-formaldehyde, methyl methacrylate-melamine-formaldehyde resins, polyethylene beads, and polyvinyl chloride can be advantageously used to avoid scratching on certain surfaces, especially plastic surfaces. enhancers.

The particle size range of abrasives is typically between 10-1000. microns and are used in concentrations of 5 to 30% in the composition. Thickeners are often used to suspend abrasives.

Organic Solvent - The organic solvent used in the composition of matter in question is the general formula CH 3 RO (CH 0 CHO) H 2 'n wherein R is an alkyl, alkenyl or alkylaryl group having 1 to 8 carbon atoms and n is an integer from 1 to 4 . It is preferred that R is an alkyl group having 1 to 4 carbon atoms, and n is 1 or 2. Particularly preferred R groups are n-butyl or isobutyl. The most preferred species are 1-n-butoxypropan-2-ol (n = 1); and 1- (2-n-butoxy-1-methyl-35-ethoxy) propan-2-ol (n = 2), and mixtures thereof. 1-n-butoxypropan-2-ol is particularly preferred.

Il 5 89938

Said organic solvent is used in an amount of 2-10% by weight of the composition, preferably 4-6%.

Optionally, the solvent system may contain a combination of the solvent described above with water-soluble CARBITOL solvents or water-soluble CELLOSOLVE solvents. Water-soluble CARBITOL solvents are compounds of the 2- (2-alkoxyethoxy) ethanol class in which the alkoxy group is derived from ethyl, propyl or butyl. A preferred water-soluble carbitol is 2- (2-butoxy-10-ethoxy) ethanol, also known as butyl carbitol. Water-soluble CELLOSOLVE (5) solvents are compounds of the 2-alkoxy-ethoxyethanol class, with 2-butoxyethoxyethanol being preferred.

Suitable solvents for use with the solvents of the invention also include benzyl alcohol and diols such as 2-ethyl-1,3-hexanediol and 2,2,4-trimethyl-1,3-pentanediol.

The co-solvents described above can be used in amounts ranging from 0.1 to 5% of the co-20 symbol.

These compositions are substantially free of terpene solvents. If solvents are generally used in amounts in excess of about 2%, terpenes cannot be included in the claimed compositions in such proportions. It will be appreciated, however, that relatively minor additional amounts of terpenes, e.g., less than about 0.6% (based on the total detergent composition), may be present, derived from conventional ingredients such as perfumes.

Possible Ingredients - In addition to the essential ingredients listed above, the present composition of matter may contain additional components that may be highly desirable.

For example, it is highly preferred that the compositions contain a detergent builder and / or a metal ion sequestrant. Compounds that are classifiable and well known as detergent builders include nitrilotriacetates, (NTA), ethylenediaminetetraacetate (EDTA), amino polyphosphonates (DEQUEST), water-soluble phosphates such as tri-polyphosphate, and sodium ortho- and pyro- phosphates, silicates and mixtures thereof. These builders are preferably not used in combination with hard abrasives such as calcium carbonate, but are recommended in combination with soft organic abrasives such as polyvinyl chloride.

Metal ion sequestrants with a lower metal sequestration constant can be advantageously used in combination with hard or soft abrasives. Such metal ion sequestrants include poly-carboxylates and citrates. Building materials / sequestrants useful in the present invention include NTA, EDTA, citrates, and mixtures thereof. The builders / sequestrants may be present in amounts ranging from 1-15%, preferably between 2-7%.

It is also very advantageous to include soaps in the compositions of the invention. Soaps made from Coconut Oil fatty acids are recommended.

Soaps are used in amounts ranging from 25% to 2-3% by weight of the composition, preferably more than 1% by weight, typically 1-2% by weight.

This amount is clearly higher than those currently used in similar compositions, as it has surprisingly been found that the presence of soaps in these higher amounts not only provides control of the foam but also has a thickening effect on compositions containing the specific organic solvent of the invention. This finding makes it possible to keep the amount of thickener at a very low level of al-35, which significantly reduces the amount of thickener.

II

7 89938 substances, such as rinsing difficulties resulting from their use in significant quantities.

Thickeners should preferably be included in the compositions of the invention to suspend the abrasive. However, the amount is kept below 2%, preferably between 0.2-1.5%. In this case, common thickeners such as polyacrylates, xanthan gum, carboxymethylcellulose species, swellable smec-10 clay species and the like can be used.

Possible components are also those materials that are typically used in commercial products to enhance the aesthetic or other beneficial properties of the product. Typical ingredients include pH adjusting agents, perfumes, colorants, optical brighteners, dirt suspending agents, cleaning enzymes, gelling agents, freezing and thawing stabilizers, bactericides, preservatives, and the like.

Another possible substance used herein is represented by conventional detergent hydrotropic agents. Examples of suitable hydrotropes are urea, monoethanolamine, diethanolamine, triethanolamine and the sodium, potassium, ammonium and alkanolammonium salts of xylene, toluene, ethylbenzene and isopropylbenzenesulfonates. However, a particular feature of the present invention is that stable preparations can be prepared without the need for hydrotropic agents of this nature.

The compositions of the invention typically contain up to about 90% water as a carrier. By way of example, the amount of water may vary in a range of, for example, 50-80%. Mixtures of water and alcohol (e.g. ethanol, isopropanol, butanol, etc.) 35 can also be used. · Alkylated polysaccharides can be used to improve the stability and potency of the compositions.

The compositions of the invention may be prepared in an alkaline pH range, generally between pH 8-11, preferably between about 10-10.8. Temporal agents such as sodium hydroxide and sodium carbonate may be used to adjust and buffer the pH, if desired.

The following examples are provided to illustrate the compositions of matter of the invention, but are not intended to limit the scope of the invention.

Abbreviations: NAPS = sodium C 1 -C 6 paraffin sulfonate LAS = linear C 1 -C 8 alkylbenzene sulfonate sodium salt LAB = linear C 10 -C 22 alkylbenzene

Lutensol R A07 = condensate comprising one mole of C 1-4 fatty alcohol 7 moo-12 14

With ethylene oxide p 20 Dobanol 45/7 = C 1 -C 4 oxoalcohol with 7 moles of ethylene oxide per mole of alcohol HCnFA = narrow distillation fraction, cured to form fatty acid 25 NTA = sodium nitrilotriacetate EDTA = ethylenediaminate

CaCO-, = calcium carbonate

^ R

Sokolan PHC 25 = crosslinked polyacrylate thickener 30 ETHD = 2-ethyl-1,3-hexanediol TMPD = 2,2,4-trimethyl-1--3-pentanediol PVC = polyvinyl chloride

Creamy cleansers were prepared by mixing the listed ingredients in said proportions of 35% (by weight).

Il 89938 9

Ingredients Composition A Eg I

LAS 0.5 4.0

NaPS 3.0

LutensolAO7 0.3 5 3.0 - HCnFA 0.2 1.2

Benzyl alcohol 1.5

Orange terpenes 2.0 l-butoxypropan-2-ol - 5.0 10 NTA - 4.0

CaCO 3 30.0 PVC - 10.0

Sokolan® PHC25 0.6 0.4

Water + less than 15 ingredients total

The aforementioned compositions of matter were comparatively tested on synthetic stains representing typical hard-surfaced household stains. Test stains 20 were prepared as follows.

(a) HBTS stain: Consists of 250 ml of isopropyl alcohol, 75 g of calcium urostearate powder and 0.5 g of gas soot. It is applied with a roller to enamel coated metal plates (cleaned with detergent and then with alcohol), and the plates are heated at 180 ° C for 20 minutes.

(b) KD stain: Consists of 25% HSW ^ -j | hra-aln with gas soot (2) 37.5% Crisco ^ iV (1) oil, 37.5% Puritan (5) (1) -oil. This stain 30 is applied using a paint roller to stainless steel plates (pre-cleaned with detergent and then alcohol). It was necessary to apply a very thin even layer because the stain was difficult to cure.

: 35 Place the plates in an oven at 115 ° C

^ 9938 ίο ("soft stain") or 170 ° C ("hard stain"), for two hours and then allow the plates to age for at least one day.

(1) Commercial cooking oil sold by The Procter & Gamble 5 Company

(2) Commercial tracer sold by Chem Pack Inc., USA

The test conditions were as follows:

The experiment was performed with the help of Erichsen's 10 washing machines. A sponge measuring 9.5 x 5x4 cm was used after it was thoroughly washed with hot running water and pressed between drying rollers. 5 g of undiluted test detergent was sprayed over the other side 15 of the sponge. The number of strokes of the cleaning machine varied according to the type of stain. Performance readings were recorded as soon as cleaning discrepancies became apparent. The reviews were visually conducted by three independently working review-20 judges. Power efficiencies were demonstrated via pairwise comparison in duplicate as follows. A scale of 0-4 was used, with 0 denoting a different difference; 1 = possible difference; 2 = uniform difference; 3 = clear difference; 4 = large difference.

25 The test results are listed below. Prior art material composition A was a reference to which the material composition of Example I was compared.

Stain Composition A Example I

KD comparator + 0.5 30 HBTS +2.0

The above experiment confirms the significant performance benefits available with the compositions of matter of the invention compared to a similar composition of matter known in the art.

In addition, the following compositions were prepared: f (11 39938

B

B

£ 6 o 04 o o o co * ““ ^

M I I I rH I I I I LO I (N I | O O

I-i

B

£ § o o o cn OO O O M- ω '· * · ""' - - w CO .H I rO .H | | | rH CN I | I ro o I o ro

B

> ε • h m o cn o m o o o ooo o h · (/} V *. ^ *. *. k. «. H« k «. K ·. · *

W O CO O rO rH | rH | rH 00 I CN rH CN | O O

'-I

> 6 h o o m o ooooo ^ r

(0 *. *. * »*. ^ K. ^ ^ ·». V

W Γ0 »H I I i — 1 * —I I I I I tr rH rH ro | O O

I-i

>

B

• mö ε) -ι • h in o ro o cn oooooo "3 ·: ιθ [/] kkksskkkkkk * ·: ra WO ΓΟ O ro rH | l rH I (NI CO rH rH OIO g ro 3 aha, H o H Ή •

So 04 O O O ^ M · * · * *> *. * · «* W I I I H I | | | | UI rr I 1 l o o

r — I H

:: h ':' 'ε' • Ho o cn ooo · ^ CO *. *> k · »·.

W "s · I I ro. — I i i i i I m h · ι» o ι o! Ro ...: i

> 1 MO

> 1 -H

• H 4- »Dj rH -H I (UI g: O rH C ε C ID 0) r- .CO (0 I rfl cn 10

O 04- »Dl rH Dj U-H

<λ; -h oio κ mo © rH Λ μ -H (H dj 3

(0 μ Dj ω Dj MO

• H (0 Ή Λί ^ Ή (OS J> 4-> -H rH M (O OH 4-1 V- / (0 «JO> ι -H Λ! 4-> tn 4-) C + Ή tn tn > ih oa ro <βιη

O C ro <tn> <4 -) - HjQ0’H (0 ro H Λ O

QJ tnd) OpLj4 -)> iQQ3rH | 4-) H <μθ 044φ

C COOj-PUCCHJffiPjjaOfNtUOrtlEH-1-tUU- ^ H-iC

• H <(03 (0U (1) 3EhSI Ι '-' · ΗΙΕΗα · Η «0> Ο0) · Η C J2iJ2K0Q0QWEHrHCNHH (N2iycnUDjW> ft5

Claims (8)

12 8 9 938 A viscous, creamy abrasive detergent comprising a surfactant, an organic solvent, an abrasive and, if desired, conventional additives, characterized in that said detergent is free of terpenic solvents or contains up to 2% thereof; and that the organic solvent is represented by the formula: CH 3 R 0 (CH 2 CHO) n H wherein R is a C 1 -C 8 alkyl, alkenyl or alkylaryl group, preferably a C 1 -C 4 alkyl group, and n is an integer from 1 to 4, and that the Mohs hardness of the abrasive is 7 or less. Composition according to Claim 1, characterized in that R is a C 1 -C 4 alkyl group and n is 1 or 2. Composition according to Claim 2, characterized in that the organic solvent is 1-n-butoxypropan-2-ol or 1- (2-n-butoxy-1-methylethoxy) -propan-2-ol or a mixture thereof. Composition according to one of Claims 1 to 3, characterized in that the organic solvent is from 2 to 10% by weight. Composition according to one of Claims 1 to 4, characterized in that it contains 1 to 15% by weight of detergent builder and / or metal ion sequestrant. Composition according to Claim 5, characterized in that the detergent builder and / or the metal ion sequestering agent are selected from the group consisting of nitrilotriacetate, ethylenediaminetetraacetate, citrate and mixtures thereof. • i 13 89938 Composition according to one of Claims 1 to 6, characterized in that it contains 0.2 to 3% by weight of fatty acid soap. A viscous, creamy, abrasive cleaning agent according to any one of the preceding claims 5, characterized in that it contains - 3 to 5% by weight of an organic surfactant; - 1 to 2% by weight of fatty acid soap; - 4 to 6% by weight of an organic solvent selected from the group consisting of 1-n-butoxypropan-2-ol, 1- (2-n-butoxy-1-methyllethoxy) propan-2-ol and mixtures thereof; - 2 to 7% by weight of a detergent builder and / or a metal ion sequestrant selected from the group consisting of nitrilotriacetate, ethylenediaminetetraacetate, citrate and mixtures thereof. 39938