CS242265B1 - Method of polypropylene textile materials preparation before cation dye stuffs dyeing - Google Patents

Abstract

The invention is within the field of technology treatment of plastics polypropylene textile materials prior to staining with cationic dyes. The essence of the method according to the invention resides in that the polypropylene textile materials are impregnated in a mixture consisting of 5 to 20 wt. parts of pleionomeric polypropylene methylene sulfonic acid acids and 70 to 95 wt. parts of xylene. Impregnated in this way the material is dried at 5 to 80 ° C, then fix for 0.5 to 7 min. at the temperature 105 to 130 ° C, overflow at 2 to 10 ° / o-nom aqueous sodium carbonate in water and finally dried at room temperature.

Description

The invention in the field of plastics technology solves the problem of treating polypropylene textile materials before dyeing with cationic dyes.

According to the method of the invention, the polypropylene textile materials are impregnated in a mixture of 5 to 20 wt. parts by weight of pleionomeric polypropylene ethylenesulfonic acid and 70 to 95 wt. parts of xylene. The impregnated material is dried at 5 to 80 ° C, then fixed for 0.5 to 7 min. at 105 to 130 ° C, washed in a 2 to 10% aqueous sodium carbonate solution, in water and finally dried at room temperature.

The invention relates to a method of treating polypropylene textile materials prior to dyeing with cationic dyes.

Polypropylene fibers, currently the cheapest synthetic fibers, exhibit some negative properties, such as low water sorption, static charge formation, poor oil spin washability and dyeing, usually only in the mass. These properties are related to: the non-polar nature of the polypropylene fiber resulting from the absence of polar functional groups in the macromolecule.

Unmodified polypropylene fibers are hardly colored at all by conventional dispersion dyes under normal dyeing conditions, or give only light, respectively. still decaying. For this reason, polypropylene is predominantly dyed in the mass, but this is disadvantageous in view of the feasible number of color shades and the relatively large batches colored with the same color shade, which often eliminates the economic advantage of the polypropylene fiber due to the high cost of high quality pigments.

On the principle of diffusion and co-crystallization, amphipathic oligomeric compounds can be introduced into the surface layers which alter the properties of the polypropylene fiber, increase its hydrophilicity, reduce its static charge and reduce its dirtyness by oil dirt. Such types of compounds can be prepared from depolymerized isotactic polypropylene and after inoculation with maleic anhydride by binding nonionic surfactants (AO 218 718), further based on epoxidized polypropylene oil (AO 207 103), maleic anhydride inoculated polypropylene oil and hydrophilized polyethylene 62 ' based on low molecular weight polyethylene wax (207 060).

The problem of dyeing polypropylene textile materials prior to dyeing according to the invention is that the polypropylene textile materials are impregnated with a mixture of 5 to 30 wt. parts by weight of pleionomeric polypropylene ethylenesulfonic acid and 70 to 95 wt. parts of xylene. The impregnated material is dried at 5 to 80 ° C, then fixed for 0.5 to 7 min. at 105-130 ° C, washed in a 2-10% aqueous solution of sodium carbonate, in water, and finally dried at room temperature.

Example

A 500 ml three-necked flask equipped with a stirrer and a thermometer is charged with 25 g of granulated isotactic polypropylene, 32 g of ethylenesulfonic acid, 0.5 g of dibenzoyl peroxide and 250 g of xylene. The mixture was heated with stirring at 140 ° C for 2 hours. Upon cooling and prolonged exposure, the oligomeric product (pleinomeric polypropylene ethylenesulfonic acid) precipitates as a yellow-brown precipitate. Yield 42 g. The repair and dyeing of the product are dissolved in 110 ml of xylene while hot. The solution is applied to pre-coated polypropylene backing fabrics. adjustments. To apply, the samples are initially 5 min. they are soaked, then they are treated to 100% swelling and dried in a vacuum oven at 60 ° C.

The samples are then fixed at

105 ° C / 5 min.

130 ° C 1/2 min.

The fixed samples are prewashed with a 5% Na 2 CO 3 solution, rinsed in water and freely dried.

Both treated and untreated polypropylene fabrics were dyed with the cationic dye Sandocrylmarineblau B-RL as follows:

% dye, 5% glauber salt, 1 g / l Slovaton O, pH 4 adjusted with acetic acid, bath temperature 40 ° C over 60 min. raised to boiling point at which it is stained for an additional 60 minutes. The dyed fabric is rinsed in warm and cold water.

Staining was evaluated by measuring the remission R _Amin on an RFA-2 spectrophotometer from OPTON.

The R _Xmin value of the treated dyed fabric was 20.1% compared to the R _Ammin value of the untreated and dyed fabric 46.8%.

Claims (1)

subject Method for treating polypropylene textile materials prior to cationic dyeing, characterized in that the polypropylene textile material is impregnated in a solution of 5 to 30 wt. parts by weight of pleionomeric polypropylene ethylenesulfonic acid and 70 to 95 wt. parts of xylene for 2 to 10 minutes, dried after drying at 50 to 80 ° C and fixed at 105 to 130 ° C for 0.5 to 7 minutes, the fixed material is washed in 2 to 10% - aqueous sodium carbonate solution, then in water and finally dried at room temperature.