Composition for waterproofing pile of skins, fur suede, fur sheepskin and products from them

 

(57) Abstract:

Composition refers to the leather and fur industry and household chemicals, in particular to compositions used for gidrofobiziruyuschey processing knotted leather, fur suede and fur sheepskin, as well as in chemical cleaning and daily care for leather and fur products. The composition contains paraffin, mineral oil, ester of o-phthalic acid and selectarray alkyladamantanes filler. The invention allows to improve the water resistance of the composition while maintaining high performance hygienic properties and low stiffness of the leather tanning and fur products. table 2.

The invention relates to light industry and household chemicals, namely the production of compositions intended for additional gidrofobiziruyuschey processing Giovanni knotted leather (clothing and footwear velour, suede and so on), fur suede and fur sheepskin, as well as for chemical cleaning and daily care for leather and fur.

Famous composition comprising paraffin wax, polyethylsiloxane liquid and catalyst - tetrabutoxide and others (A. C. USSR N 1594196, class C 09 G 1/10-Gina (complex composition and method of preparation stratified storage), is unsightly pile of skins, and the index of hydrophobicity, the estimated value of the wetting angle (G), does not exceed 89oi.e. effective water resistant, in which the value of G should be substantially above 90onot reached.

Also known composition containing paraffin, polyethylene, polymethylsiloxanes liquid and others (A. C. USSR N 1654322, class C 09 G 1/10 - similar). The disadvantages of this composition are also low-tech, poor hygienic properties of the skin (low indices of air and water vapor permeability, hygroscopicity); in addition, the formed film dramatically affects the organoleptic properties of knotted leather (there is a variation and local polishing surface) and increases the stiffness of the leather.

Closest to the technical essence and the effect achieved in the invention is a composition comprising paraffin, mineral oil, polyterpenes, in primary forms and dibutyl phthalate, smoothing the color of the pile surface of the leather (A. C. USSR N 1652354, CL C 14 C 9/00, 9/02 - prototype). The disadvantages of the prototype are the low water resistance of the composition and low hygiene is ü the claimed invention is improving the quality of the composition, to improve water repellency pile of skins, fur suede, fur sheepskin and products while ensuring high performance vapour and air permeability, hygroscopicity and maximum sorption of moisture by the material of pagodinho and vnutrivennogo space, as well as maintaining low stiffness leather.

To achieve this goal according to the invention in a composition comprising paraffin, mineral oil and an ester of o-phthalic acid, is introduced selectarray alkyladamantanes filler at the following ratios, wt.%:

Paraffin - 12-23

Oil mineral 62-71

An ester of o-phthalic acid - 11-16

Selectarray alkyladamantanes filler - 1-4

As the paraffin used paraffin highly technical homogenized grade B (TU 6-09-4112-88) and paraffin oil firm purified grades a and B (GOST 23683-89) with a melting point 52-54oC.

As the mineral oil used oil industrial Mar-8A-12A (GOST 20799-88), as well as oil-softner brand MP-75 (TU 38-101952-83).

As complex>/P>Selectabase alkylolamides filler served ultrafine filler brand NVDM-8 (TU 2169-001-0470693-93), obtained by chemical modification of the surface of particles of silicon dioxide by alkylchloro silane in a gas-vapor stream. In appearance it is a granular white powder with a bulk density of 0.11 g/cm3; contents methylsilyl groups is 0.92 mmol/g, the content of hydroxyl groups - 0.51 mmol/g Specified filler has a high heat-, light - and weather resistance, biologically harmless and is not flammable.

Use for cooking gidrofobiziruyuschey composition as modifying additives according to the invention selectabase alkyladamantanes filler does not cause technological difficulties dosing and mixing with other components. The high degree of dispersion systems (the size of the filler particles is less than 0.1 μm is close to the colloid) leads to high sedimentation and aggregate stability of the composition in the form of a melt and an organic solvent; the system does not stratify during storage, indicating a high processability of the inventive composition.

The use of this is to improve water-repellent properties of these natural materials without deterioration as a result of waterproofing their organoleptic and ergonomic (softness, hygienic indicators, ecological purity) properties.

The invention is illustrated in examples 1-7. A comparative example is known composition obtained by the use of polyterpenes, in primary forms (TU 81-0519-78), according to the prototype, but unlike the latter, dibutyl replaced by another more macromolecular representative esters of o-phthalic acid - dioctylphthalate, and the industrial AND oil-8A - another mineral oil softening agent MP-75 (example 1). In examples 2 to 7 shows the compositions and properties of the compositions and materials obtained with the use of selectabase alkyladamantanes filler.

Known composition and the compositions 1 - 7 were prepared by the following method. In the capacity of an enamel or stainless steel with electric heater closed type was downloaded an estimated quantity of paraffin. After complete melting at a temperature of 60-70oC was introduced with careful mixing the desired amount of mineral oil, ester of phthalic acid and polyterpenes, in primary forms (known composition and example 1) or selectabase filler (examples 2 to 7).

Example preparation of an optimum variant gidrofobiziruyuschey composition (example 5).

melt the paraffin at a temperature of 60-70oC and under stirring was added 64 g of mineral oil MP-75, 13 g of dioctylphthalate and 3 g selectabase filler brand NVDM-8.

Recipe of all variants gidrofobiziruyuschih compositions and known composition are presented in table. 1. The method of preparation does not differ from example 5.

Compositions 1 - 7 and known composition was applied on the samples pile of skins, fur suede and fur sheepskin produced by typical methods that do not involve special gidrofobiziruyuschey handling during manufacture, or products from these materials after their preliminary chemical cleaning, as well as in daily care of clothes or shoes from these materials.

Hydrophobized processing offered by the compositions and known compound was performed using the laboratory setup, simulating a drum machine chemical cleaning according to the following procedure. In the capacity poured into an organic solvent (perchloroethylene, white spirit), was added the calculated amount claimed gidrofobiziruyuschey composition or known composition and thoroughly mixed. The concentration of the final product depended on the type of processed material, pig split leather A8 - 10 min of rotation of the drum. The sample was then gently pressed between sheets of filter paper using plyaski and dried at a temperature of 45-50oC for 40-50 min in a fume hood. Consumption gidrofobiziruyuschey composition in all cases did not exceed 96 g/kg of the processed material.

Preliminary chemical cleaning of the samples was conducted in the environment perchlorethylene in the same laboratory setup mode: module 7 baths, duration 4 - 6 minutes

Additional option of using the claimed composition is one-sided surface gidrofobiziruyuschey processing of the front side of the material or products (clothes, shoes) from the pile of skins, fur suede and fur sheepskin. This version of the hydrophobization can be recommended for use not only in production but also in the home for daily care for leather and fur products to ensure consistently high performance water resistance and hygienic properties. The technique of the operation is as follows. The composition was prepared similar to that described above in one of the best options formulations (examples 4 and 5). In a special container with a stirrer poured into an organic solvent (perchlorate is within 5 minutes preparing a homogeneous composition with a concentration of 40 - 45 g/L. the resulting product is evenly distributed on hydrophobinum surface using pulverizer device at a flow rate gidrofobiziruyuschey composition of 15-20 g/m sq

Organoleptic evaluation of hydrophobized samples showed no change in their color and hardness. Changes in linear dimensions of the samples (shrinkage or draw) is also not detected. The results of other tests are summarized in table. 2.

It should be noted that the proposed composition for the hydrophobization pile of skins, fur suede and fur sheepskin, having good processing properties, does not impair the organoleptic properties of hydrophobized materials, can improve the performance of their water-repellent properties (compared to the prototype vodovoroty increases by almost 80%) without increasing the stiffness of the leather and significantly improve the level of performance of hygienic properties (hygroscopicity is almost 2 times the maximum sorption capacity of water vapor and 12.5%, permeability - 43%, the permeability is almost 2 times); i.e., resulting from the use of the proposed gidrofobiziruyuschey composition remains almost the level of oral hygiene index is.

Composition for waterproofing pile of skins, fur suede and fur sheepskin, including paraffin, mineral oil and an ester of o-phthalic acid, characterized in that it further comprises selectarray alkyladamantanes filler in the following ratio of components in the mixture, wt.%:

Paraffin - 12 - 23

The mineral oil - 62 - 71

Ester of o-phthalic acid - 11 - 16

Selectarray alkyladamantanes filler - 1 - 4

 

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