CS242265B1 - A method of treating polypropylene textile materials prior to staining with cationic dyes - Google Patents

Abstract

The invention, which falls within the field of plastic technology, addresses the problem of treating polypropylene textile materials before dyeing with cationic dyes. The essence of the method according to the invention is that polypropylene textile materials are impregnated in a mixture consisting of 5 to 20 parts by weight of pleionomeric polypropylene ethylene sulfonic acid and 70 to 95 parts by weight of xylene. The material impregnated in this way is dried at a temperature of 5 to 80 °C, then fixed for 0.5 to 7 min. at a temperature of 105 to 130 °C, washed in a 2 to 10 % aqueous solution of sodium carbonate, in water and finally dried at room temperature.

Description

The invention of plastics technology addresses the problem of treating polypropylene textile materials prior to dyeing with cationic dyes.

The principle of the invention is that the polypropylene textile materials are impregnated in a mixture consisting of 5 to 20 wt. parts of pleionomeric polypropylene methylene sulfonic acid and 70 to 95 wt. parts of xylene. The material so impregnated is dried at 5 to 80 ° C, then fixed for 0.5 to 7 min. at 105-130 ° C, washed in 2-10 ° C aqueous sodium carbonate solution, water and finally dried at room temperature. 242265 242265

The present invention relates to a process for the treatment of polypropylene textile materials prior to dyeing with cationic dyes.

Polypropylene fibers, currently the cheapest synthetic fibers, exhibit some negative properties, such as low water vapor sorption, static charge build-up, poor oil spillage, and contracted dyeing, only in bulk. 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 almost completely uncoloured by conventional dispersion dyes under normal dyeing conditions, or give only light or light color. unsteady. From the above, polypropylene is predominantly dyed in the mass, but this is disadvantageous in terms of the feasible number of color shades and the relative large batches stained by the same color shade, thereby often eliminating the economical advantage of polypropylene fiber due to the high cost of quality pigments.

By virtue of diffusion and cocrystallization, amphipathic oligomeric compounds can be introduced into the surface layers, altering the properties of the polypropylene fiber, increasing its hydrophilicity, reducing its static charge and reducing its filthiness by oil dirt. Such types of compounds can be prepared from depolymerized isotactic polypropylene and, after inoculation with maleic anhydride, by bonding nonionic surfactants (AO 218 718), further based on epoxidized polypropylene oil (AO 207 103), polypropylene maleic anhydride grafted oil and hydrophilized polyethylene glycol (AO 218 627), as well as based on low molecular weight polyethylene wax (207,060).

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

To a 500 ml three-necked flask equipped with a stirrer and a thermometer, 25 g of granulated isotactic polypropylene, 32 g of ethylene sulfonic acid, 0.5 g of dibenzoyl peroxide and 250 g of xylene are added. The mixture was heated with stirring at 140 ° C for 2 hours. By cooling and longer, the oligomeric product (pleinomeric polypropylene methylene sulfonic acid) precipitates as a tan solid precipitate. Yield: 42 g. Repair and staining 12 g of the product are dissolved in 110 ml of xylene while hot. The solution is applied to polypropylene companion fabrics stripped of pre-fabrication. adjustments. It is applied so that the samples are initially 5 min. they are soaked, then the blisters are made 100% bleached and dried in a vacuum oven at 60 ° C.

The samples are then fixed at 105 ° C / 5 min. 130 ° C 1/2 min.

Fixed samples are pre-washed with 5% Na 2 CO 3 solution, washed in water and freely dried.

Treated as well as untreated polypropylene fabrics were stained with cationic dye Sandocrylmarineblau B-RL followed by: 4% dye, 5% glauber's salt, 1 g / l Slonon O, pH 4 adjusted with acetic acid, bath temperature 40 ° C during 60 min. min. boiling at which time it is dyed for a further 60 minutes. The colored fabric is washed in warm and cold water.

Staining was evaluated by measuring the RAmin remission on the RFA-2 spectral photometer from OPTON. The RXmin value of the treated dyed fabric was 20.1% compared to the RAmjn of 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.