CS234819B1 - Lubricating and/or greasing microemulsion textile auxiliary agent for polyester threads - Google Patents

Description

The invention relates to a lubricating and / or lubricating microemulsion auxiliary composition based on polydimethylsiloxane.

Modern sewing machines are characterized by high working speeds at which the needle temperature reaches no more than 100 ° C, therefore it is necessary to avoid direct contact of the thread with the guiding metal elements and the needle of the sewing machine by using suitable preparations.

For the preparation of yarns are used: solid paraffin, paraffin emulsions, mineral, vegetable oils, waxes, fatty acid esters, polyglycols, alkoxylates, silicones. These improve the sliding properties of yarns subjected to shear friction at considerable shear speeds while avoiding mechanical and thermal destruction of the yarns. Of particular importance is the use of formulations in polyester yarns that are very susceptible to tribothermic damage. The bulk of the polyester thread preparation compositions are based on silicone emulsions which are thermally stable and have good performance at higher temperatures. Disadvantage of emulsions used so far! is that, due to their low viscosity, they cause severe contamination of the machinery as well as the air at the application roller as a result of the microdrop drop of the emulsion from the surface being treated with this type of yarn. in general, ^T ^ hear the irritation to the eye mucosa '] which makes it difficult to handle during application. Low? viscosity emulsion! it is often the cause of the lubricant flowing off, which makes the amount applied uneven.

In part, these drawbacks have been eliminated by the lubricant and lubricant according to CSSR AO 208 610, which protects the use of an inverted silicone oil emulsion. Coarse dispersions of silicone oil emulsions of stage AO 189 817 are also relatively unstable.

This drawback is overcome by the lubricating and / or lubricating microemulsion formulation according to the invention, which consists of 20 to 32 wt. parts of polydimethylsiloxane having a viscosity of 200 mPa. 18 to 35 wt. parts by weight of a fatty alcohol having a carbon number of 10 to 14 oxyethylated in an average of 2 to 6 moles of ethylene oxide, 18 to 22 wt. parts of alkyl polyglycol ether phosphate of an oxyethylated fatty alcohol having an average C ₁₀ to C ₁₀ alkyl length and an average degree of oxyethylation of 12 to 14 in the form of the monoethanolammonium salt and 30 to 40 wt. parts of water.

Silicone oil based microemulsions are thermodynamically stable and are characterized by high viscosity; the thermodynamic stability of the microemulsion provides better technological certainty. High viscosity has, in addition to a certain viscosity margin under tribothermic stress, the additional advantage that such lubricants do not tend to splash, thus eliminating the emission of micro-drops to the environment during application of the preparation and the problem of run-off from the yarn.

EXAMPLE

To 30 wt. by part of polydimethylsiloxane T and b at 1 'k and 1

Efficacy of the polyester-based microemulsion preparation (Konit 14 tex x 2} Preparation type Coating __________%

Microemulsion of Example 1 1.5

Thread without preparation - viscosity 200 mPa. 20 wt. parts by weight of a C ₁₀ -C ₁₄ alkyl alcohol fatty alcohol having an average of 4 moles of ethylene oxide, 20 wt. parts of an alkyl polyglycol ether phosphate of an oxyethylated fatty alcohol having an average C ₁₀ to C ₁₆ alkyl length and an average degree of oxyethylation of 13 in the form of the monoethanolammonium salt and 30 parts of water. The mixture was stirred vigorously at 70 ° C for 10 minutes. The prepared microemulsion is applied in an amount of 0.1 to 1.5% on polyester yarns by conventional spospb. The efficacy of the preparation is shown in Table 1.

polydimethylsiloxane according to the invention to

Sewing coefficient Sewing friction% ability

0.223 80.1 2

0.351 59.7 3

The coefficient of friction was determined on the instrument of a meter from Zweigle

Slip was determined on a BOEGLIN CGR 4

Sewing capacity was determined on a machine of the Pfaff 436 at a speed 5100 ^min-1

Claims (4)

Lubricating and / or masticating a microemulsion textile auxiliary composition for polyester yarns based on polydimethylsiloxane, characterized in that it consists of 20 to 32 wt. parts of polydimethylsiloxane having a viscosity of 200 mPa. . 18 to 35 wt. parts by weight of a fatty alcohol having a carbon number of 10 to 14 of the invention xyethylated on average 2 to 6 moles of ethylene oxide, 18 to 22 wt. parts of alkyl polyglycol ether phosphate of an oxyethylated fatty alcohol having an average C ₁₀ to C ₁₆ alkyl length and an average degree of oxyethylation of 11 to 14 in the form of the monoethanolammonium salt and 30 to 40 wt. parts of water.