CS258373B1 - Impregnation bath based on a mixture of disperse acrylate copolymers - Google Patents

Abstract

The solution relates to an impregnation bath based on a mixture of dispersion acrylate copolymers, intended for application to textile or other flat materials in order to form a film on the surface of these materials, thereby modifying their properties. The impregnation bath consists of at least two aqueous dispersions of acrylate copolymers, containing active groups, in particular amido, hydroxy and carboxy, and other additives according to the purpose of application of the impregnation bath. After application of the impregnation bath, processing at a higher temperature. The type of acrylate copolymers and their weight ratio in the impregnation bath is controlled according to the required properties of the treated flat material.

Description

BACKGROUND OF THE INVENTION The present invention relates to an impregnating bath based on a mixture of dispersed acrylate copolymers intended for application to textiles or other sheet materials in order to modify their properties.

The prior art impregnating baths containing acrylate copolymers consist of aqueous dispersions of these copolymers with the addition of other substances such as aminoformaldehyde precondensates, catalysts, aqueous dispersions of polymers and copolymers other than acrylate type, fillers, colorants, plasticizers, antistatic agents, dispersing and emulsifying agents, dies, emulsion stabilizers, protective colloids, anti-migration agents, antifoams, hygroscopic substances, solvents and the like.

The impregnating baths are applied to textile sheets by some of the known techniques. After the impregnation bath is applied, it is followed by drying or further heat treatment.

The acrylic copolymers applied to the surface of the textile sheet material form a film upon drying on the surface of which the properties are determined by the chemical composition of the acrylate copolymers. The reactive types of these acrylate copolymers react either with each other or with aminoformaldehyde precondensates , thereby achieving partially permanent effects. These effects are particularly evident in improved feel, increased elasticity, suppression of shrinkage and tendency to pilling.

The formed film based on acrylate copolymers can also serve to fix pigment dyes which are applied to the surface of the textile materials together with the acrylate copolymers and other additives either in the form of a low viscosity impregnating bath or in the form of a printing paste.

An increase in the level and, at the same time, the permanence of the effects is achieved by applying the impregnating bath according to the invention.

Accordingly, the present invention provides an impregnating bath comprising at least 1% by weight of a mixture of at least two dispersed acrylate copolymers mixed in a weight ratio of 5:95 to 95: 5, wherein one dispersed acrylate copolymer contains at least 1% by weight acrylic or methacrylamide or alkoxymethylacrylamide or the alkoxymethyl methacrylamide and the second dispersed acrylate copolymer contain, in addition to other olefinically unsaturated monomers, 1 to 15% by weight of acrylic or methacrylic acid, up to 1 to 15% by weight of hydroxyalkyl acrylate or hydroxyalkyl methacrylate; or propyl and alkoxy is methoxy, ethoxy, propoxy, butoxy or isobutoxy.

The combination of at least two dispersed acrylate copolymers containing active groups, in particular amido, hydroxy and carboxy, results in the interaction of the copolymers in the acidic environment on the surface of the dispersed particles, during concentration, for example during textile drying, which is reflected in the film fabrics.

Subsequent treatment of the fabric with the dried polyacrylate film, at a temperature of 100 to 200 ° C, results in improved crosslinking of the polyacrylate film.

Examples of particular embodiments of the invention:

Examples of compositions of dispersion acrylate copolymers A1 to component I having a dry matter content of up to 55% by weight

Composition of copolymers

(% w / w) ^A 1 ^B 1 ^C 1 ^D 1 · ^E 1 ^P 1 styrene 27 Mar: - - 23 - 25 butyl acrylate 59 80 - 60 - 68 methacrylamide 10 7 5 - - - isobutoxymethymethacrylate 3 - - 5 - - acrylic acid 1 - - 1 - - methacrylic acid - - - - 1 4 N-methylolacrylamide - - 3 - 4 - methyl methacrylate - - 47 - 30 - ethyl acrylate - - 45 - 60 - acrylonitrile - 13 - 10 - - acrylamide - - - 1 5 - N-isobutoxymethylmethacrylamide - - - - - 3

Examples of composition of dispersed acrylate copolymers A ₂ to H _{2 of} component II with dry matter

20 to 55% by weight Composition of copolymers (weight *) ^A 2 ^B 2 ^C 2 ^D 2 ^E 2 ^F 2 ^G 2 «2 styrene 4 - - 10 8 - - 30 ethyl acrylate - 30 60 10 - - - 50 butyl acrylate 78 40 - 60 72 80 70 - methyl methacrylate - - 30 - - - 10 - acrylic acid 6 - 1 5 - 15 Dec - - methacrylic acid, - 14 - - 2 - 6 3 2-hydroxyethyl methacrylate 6 - - - 9 2 - - 2-hydroxyethyl acrylate - - - 8 - - 12 12 2-hydroxypropyl methacrylate - - 5 - - - - - 2-hydroxypropyl acrylate - 14 - - - - - - N-isobutoxymethylmethacrylamide 6 - - - 9 3 - - N-butoxymethylmethacrylamide - - 4 - - - 2 - N-Busoxymethacrylamide - - - 7 - - - - N-isobutoxymethyl acrylamide - 2 - - - - - 5

Each of said components I reacts with any component II during drying of the impregnation bath on the surface of the linen fabric to form a film. The properties of the surface film formed can be controlled by the selection and weight ratio of components I and II in the impregnation bath. When building the impregnation bath, it is possible to combine a mixture of two or more component copolymers with component II copolymers and vice versa. Additional additives may be added to the impregnation bath. A large number of combinations of copolymers of component I and component II give three examples of impregnating bath loading of said components.

example 1

Impregnating bath reducing the tendency of the fabrics to pilling.

parts by weight of the aqueous dispersion of component I - copolymer D ^ of 40% by weight, parts by weight of the aqueous dispersion of component II - copolymer E ₂ of 45% by weight, parts by weight of dimethyloldihydroxyethyleneurea 50%, parts by weight of magnesium chloride; part by weight of wetting agent,

879 parts by weight of water per

000 parts by weight

PH adjustment to 5 with acetic acid

Example 2

Impregnating bath to reduce fabric shrinkage:

parts by weight of the aqueous dispersion of component I - the copolymer of 50% by weight, parts by weight of the aqueous dispersion of component II - the copolymer of A ₂ with the dry matter of 50%

100 parts by weight of dimethyloldihydroxyethyleneurea 50%, parts by weight of magnesium chloride, part by weight of a wetting agent,

829 parts by weight of water per

000 parts by weight

Adjust pH to 5 with hydrochloric acid.

Example 3

Impregnating bath for permanent hardening treatment:

parts by weight of an aqueous dispersion of component I - a copolymer of 40% by weight, parts by weight of an aqueous dispersion of component II - a copolymer of D ₂ of 50% by weight of a wetting agent,

939 parts by weight of water per

000 parts by weight

Adjust pH to 4.5 with phosphoric acid.

Example 4

Impregnating bath for permanent non-coagulation and touch treatment:

parts by weight of an aqueous dispersion of component I - copolymer F ^ with a dry matter content of 45%, 10 parts by weight of an aqueous dispersion of component II - copolymer A ₂ with a dry matter content of 50% by weight of dimethyloldihydroxyethyleneurea 5.0%; % by weight of wetting agent

889 parts by weight of water per

000 parts by weight

PH adjustment to 5 with acetic acid.

The impregnating bath can be applied to textile sheet materials by known methods - such as weaving, in some way a minimal coating, spraying and the like, for treatment of shrubs, bedding, outer garments, fixation of collar and clothing inserts, bookbinding cloths, tablecloths, sportswear, carpets, furniture fabrics, faux fur, fleeces, nonwovens, technical fabrics and the like. It can also be applied to non-textile flat materials.

Claims (1)

Impregnating bath based on a mixture of dispersed acrylate copolymers with a dry matter content of 20 to 55% by weight, and a pH of less than 7, intended for application to textile or other surface materials for the purpose of modifying their properties, with added additives such as aminoformaldehyde precondensates aqueous dispersions of polymers and copolymers other than acrylate type, fillers, colorants, emollients, antistatic agents, dispersing and emulsifying agents, thickeners, emulsion stabilizers, protective colloids, antifouling agents, antifoams, hygroscopic substances, solvents, characterized in that comprising at least 1% by weight of a mixture of at least two dispersed acrylate copolymers mixed in a weight ratio of 5:95 to 95: 5, wherein the one dispersed acrylate copolymer comprises olefinically unsaturated secondary monomers of at least 1% by weight acrylic or the methacrylamide or alkoxymethyl methacrylamide or alkoxymethyl methacrylamide and the second dispersed acrylate copolymer contains, in addition to other olefinically unsaturated monomers, 1 to 15% by weight of acrylic or methacrylic acid, 1 to 15% by weight of hydroxyalkyl acrylate or hydroxyalkyl methacrylate; methyl, ethyl or propyl and the alkoxy group is methoxy, ethoxy, propoxy, butoxy or isobutoxy.