LT3683B - Carboxylic acid partial ester-containing fulling oils - Google Patents

Abstract

The invention relates to fulling oils for pelts containing C6-36 carboxylic acid partial esters of polyols with 3 to 22 OH groups.

Description

FIELD OF THE INVENTION The present invention relates to the use of fatty oils for fattening fur, as well as the use of certain partially esterified monocarboxylic acid esters for fattening fur.

Fat-greasing in hammer kneading machines or similar machines is based on so-called greases based on lanolin and mineral oils (fur production and trade, page 123, VEB Technical Book Publication, Leipzig, 1970).

The grease itself, due to its paste-like consistency, is hard to rub into the coat. As a result, it is usually diluted with mineral oils, which significantly improves the penetration of the grease into the coat.

After the kneading process with lanolin-based greases and if necessary a thin coat of fur is removed, the fur is initially extracted with solvents; in this case, the mineral oils are practically quantitatively extracted and only a small part of the lanolin is extracted due to its lower solubility. In order to remove the absorbed lanolin from the hides, the fur is finally rolled.

Fat greasing with lanolin-based greases gives the hides the right use properties, especially softness, smoothness and softness. However, there are some drawbacks to the use of lanolin in lubricants: the resulting properties of the skinned fur depend on the ever-changing quality of the natural product lanolin. Therefore, in order to maintain consistently good coat performance, it is necessary to adjust the ratio of lanolin to mineral oil mixture and / or adjust the kneading time to the quality of lanolin used. In addition, the addition of mineral oil priLT 3683 B to lanolin-containing lubricants requires the extraction of mineral oils with solvents such as halogenated hydrocarbons. As a result, problems arise with the utilization of solvent-containing extraction residues. What's more, hides treated with lanolin-based greases always have the typical lanolin scent.

Therefore, it has been an object of the invention to provide greases of consistent quality that give the fur a constant wear and tear. Next, the greaves that are created do not have to have a specific smell, must be liquid and penetrate well into the coat.

It has been found that certain high esterified monocarboxylic acid esters meet the high demands placed on the fatty acids.

Thus, the invention is riebikiiai hides, characterized in that they contain incomplete suesterintus C ₆ _ ₃₆ monocarboxylic acids and polyols containing from 3 to 22 OH groups or esters.

A further object of the invention is the use of partially esterified esters of C ₆ -C ₃₆ - monocarboxylic acid and polyols having from 3 to 22 OH groups for fat-soaking of fur.

Preferred lubricants contain a partially esterified ester of C ₆ - ₃₆ monocarboxylic acid, most commonly C ₁₂ - ₁₈ - monocarboxylic acid, with polyols having from 4 to 15 OH groups. Particular preference with lubricants containing fully suesterintas C ₁₂ s ₈ ^- diglicerino monocarboxylic ester and / or C ₁₂ _ ₁₈ nokarboksirūgšties triglicerino ester.

moLT 3683 B

The lubricants according to the invention may contain non-volatile carbohydrates, for example mineral oils and / or alkylbenzenes, the hydrocarbon content of which depends on the desired fat content and penetration ability of the lubricant used. Most of the liquid mono-esterified monocarboxylic acid esters used in the present invention exhibit such good penetration properties that the addition of hydrocarbons is obsolete. The invention corresponding to the lubricant may comprise for ionic emulsifiers, such as citric acid, C ₈ _ ₂₂ alkyl esters and / or C ₈ alkoksinto _ ₂₂ - of fatty alcohol phosphoric acid ester and / or a non-ionic emulsifiers such as C alkoksinti _{eighth 22} - Fatty alcohols.

Particular preference is given to low-esterified monocarboxylic acid esters.

The partially esterified monocarboxylic acid esters used in the fats according to the invention can be obtained by esterification of linear and / or branched, saturated and / or unsaturated C ₆ -C ₃₆ - monocarboxylic acids with polyols having 3 to 22 OH groups in the presence of a catalyst, e.g. acid, p-toluenesulphonic acid or caustic soda. Esterification is performed at elevated temperatures, with or without solvent (Drew Myers: Surfactant Science and Technology, pp. 69-71, VCH Limited Liability Company, Venheim, 1988; Fetle Seifen, Anstrichmittel 82, 93 (1980); J. Am. Oil Chem. Soc., 66, 153 (1989)). Suitable natural and / or synthetic C ₆ -C ₃₆ monocarboxylic acids are, for example, caproic acid, caprylic acid, lauric acid, myristic acid, palmitic acid, C ₁₆ -guerboic acid, palmitoleic acid, stearic acid, 2-methylheptadecanoic acid, oleic acid. , C ₂₀ -guerbeto acid, begenoic acid, C ₃₂ -guerbeto acid and / or C ₃₆ -guerLT 3683 B betanoic acid. Guerbeto acids can be derived from fatty alcohols which, in the presence of alkaline catalysts, are converted into guerbeto alcohols, which are then oxidized to the corresponding guerbeto acids (H. Dieckelmann and H. J. Heinz, The Basic of Industrial Oleochemistry, pp. 145-147, Peter Pomp GmBH). 1988). Preference is given to saturated and / or unsaturated naturally occurring monocarboxylic acids with 12 to 18 Catomas. Suitable polyols having from 3 to 22 OH groups, typically from 4 to 15 OH groups, optionally alkoxylated with ethylene oxide and / or propylene oxide include, for example, diglycerol, polyglycerols, pentaerythritol, dipentaerythritol and / or such polyhydric alcohols. , which form monosaccharides such as sorbitol and / or mannitol during oxidation. Diglycerin has a particular preference as alcohol components.

A further object of the present invention is to provide a method for fat-skinning the fur by treating the fur at a temperature of 3050 ° C with greases containing partially esterified C ₆ -C ₃₆ - monocarboxylic acid and a polyol having an ester of 3 to 22 OH groups. Finally, the esters absorbed on the surface of the fur are removed by volumetric methods known in the art.

From 50 to 400 g of partially esterified monocarboxylic acid ester per coat.

Greasing during kneading is done after tanning of the fur, for example, in a hammer or on a crusher in a kneading machine. The grease is applied to the hides either before kneading or added immediately during kneading. It is usually kneaded for 1 to 3 hours. After the kneading process, if untanned and fully unshaven hides were used, a thin coat of coat is removed in a known manner and the hides are rolled in a roller drum with pjuLT 3683 B veins moistened with water and a moisturizer. This is done to remove the partially esterified monocarboxylic acid ester from the fur surface.

The fats of the present invention are liquid and can absorb water or emulsify, which corresponds to a higher than average quality of lanolin. Further, most of the partially esterified monocarboxylic acid esters have such good penetration properties that the use of hydrocarbons such as mineral oils and / or alkylbenzenes is no longer required. If greasing by kneading is carried out with greases that contain no or little mineral oils, solvent extraction before the rolling process becomes obsolete and eliminates the problem of disposal of solvent-containing extraction residues.

Fats that have been greased with a low-ester monocarboxylic acid ester are very soft and supple and have a distinctly better odor compared to fur treated with lanolin and also exhibit very good light and yellowing properties.

The greases of the present invention can achieve good utility properties for all types of fur, such as rabbit fur, mink fur, ondatra fur and nutria fur.

Examples

Conventionally tanned, thinly shaved rabbit hides in a hammer kneading machine were treated with one of the following greases:

A lubricant:

Diglycerin Monooleate

Grease B:

Diglycerin dioleate

C grease:

Triglycerol esterified with 2.5 molar oleic acid

D-grease:

A commercially available grease consisting of 50% by weight of lanolin and 50% by weight of mineral oil.

200 g of grease was used per coat. It was kneaded for 2 hours and the kneading temperature was 33 to 40 ° C. Once finished, the hides were stored overnight and then hung for 24 hours after hanging.

The fur was further treated with A, B or C grease. They were rolled in a rolling drum for 1 hour with sawdust moistened with water and a little moisturizer. After that, the used sawdust was replaced with new sawdust, moistened with water and a moisturizer, and continued to be used for 1 hour. After that, the used sawdust was replaced with dry and re-rolled for one hour.

Furs treated with commercially available grease were extracted with perchlorethylene for 2 x 3 minutes in a closed system on a Biow Degreaser and then rolled in a rolling drum with sawdust moistened with water and a little moisturizer.

After the rolling process, the fur treated with A-D grease was placed in a vibrating drum and the adherent sawdust was removed within 30 minutes. Stretched on the fur couch, the hides were rolled for one hour in a rolling drum with dry sawdust, and then within 30 minutes of being removed by sticking sawdust in a vibratory drum.

The table below gives an estimation of the fur treated with A-D grease 10.

Table

Grease A B C D Softness / softness 5 5 5 3 Integrity 5 5 5 3 Degreasing 4 4 4 4 (5 = fat) Shade 5 5 5 4 Hue / skin 5 5 5 4 Gloss 5 5 5 4 Coarse hair 5 5 5 4 Overall Rating ¹ 5 5 5 4

rating: 5 = very good = very poor overall rating is not an average of individual values. 20 The overall assessment assessed the overall impression.

DEFINITION OF INVENTION

Claims (5)

DEFINITION OF INVENTION Fur enrichment first kneading method is characterized in that the skins 30 to 50 ° C Kneadable with a lubricant-containing fully suesterintus C ₆ _ ₃₆ -monokarboksirūgšties and a polyol containing from 3 to 22 OH groups, esters, and then incompletely esterified monocarboxylic acid esters absorbed on the surface of the fur are removed by known means by volumetric means. 2. Method according to claim 1, characterized in that the hides Kneadable with a lubricant-containing fully suesterintus C ₆ _ ₃₆ -monokarboksirūgšties polyols having from 4 to 15 OH groups, esters, usually fully suesterintus C ₁₂ _ ₁₈ -monokarboksirūgšties and esters of polyols having from 4 to 15 OH groups. 3. Method according to claims 1-2 or any of the following claims, characterized in that the hides Kneadable with a lubricant-containing fully suesterintą C ₁₂ _ ₁₈ -monokarboksirūgšties diglicerino esters and / or fully suesterintą C ₁₂ _ ₁₈ -monokarboksirūgšties triglicerino ester . 4. A process according to one or more of claims 1 to 3, characterized in that the furs are kneaded with greases consisting of partially esterified monocarboxylic acid esters. 5. Use of partially esterified esters of C ₆ -C ₃₆ -monocarboxylic acid and polyols having from 3 to 22 OH groups for fat trimming of fur. 6. Use according to claim 5, characterized in that C ₆ is partially esterified. _36- monocarboxylic acid and polyols containing from 4 to 15 OH groups, esters, usually fully suesterinti C ₁₂ ^_ _i8 nionokarboksirūgšties polyols having from 4 to 15 OH groups esters. 5 7. Use according to one or both of the claims 5-6, characterized in that a fully suesterintas C ₁₂ _ ₁₈ -monokarboksirūgšt axle diglicerino esters and / or fully suesterintas C ₁₂ _ ₁₈ -monokarboksirūgšties triglicerino ester.