DE1153715B - Process for synthetic resin finishing of cellulose-containing textile material - Google Patents

Description

GERMAN

PATENT OFFICE

H 38137 IVc / 8 k

REGISTRATION DATE: DECEMBER 14, 1959 NOTICE THE REGISTRATION AND ISSUE OF EDITORIAL: SEPTEMBER 5, 1963

The grafting of monomeric unsaturated compounds, e.g. B. acrylonitrile or acrylamide, means ionizing rays on substrates, e.g. B. films or fabrics made of synthetic material, e.g. B. Polyethylene, polyvinyl chloride or polyamides are known.

Further, a method for modifying the properties of fibers and films is made from natural or regenerated natural polymers such as wool or cellulose, or their derivatives known, according to which the material to be treated is in close contact with an organic modifier is subjected to ionizing radiation. These modifiers act they are essentially unsaturated compounds which lead to the formation of addition polymers by vinyl polymerization are suitable, e.g. B. acrylates or methacrylates.

The purpose of the invention is the grafting of chemical substances onto cellulosic To improve textile goods with the help of ionizing radiation, by the latter in advance by a Treatment with an aromatic compound, which in the o-, m- or p-position is an aliphatic Bears substituents with secondary carbon atoms, is esterified or etherified.

The invention relates to a method for the synthetic resin finishing of cellulosic! Textile goods by grafting on chemical substances under single or multiple effects of ionizing ones Rays which form active groups in the molecular chains of cellulose that are capable of grafting reactions, which is characterized in that the cellulose-containing textile material before the irradiation and the Grafting with an aromatic compound, which in the o-, m- or p-position is an aliphatic Substituents with secondary carbon atoms, in particular isopropyl groups, is treated. Such aromatic compounds are e.g. B. o-, m- or p-carboxylic acids or phenols or alcohols or their derivatives, such as B. chlorine derivatives of isopropylbenzene, isobutylbenzene. Particularly beneficial is the use of p-isopropylbenzoyl chloride.

Other suitable compounds are I- [I'-methobutyl] -benzene (jtf-phenylpentane), I- [I'-methoamyl] -benzene (ß-phenylhexane), I- [r, I ⁴ -dimethoamyl] -benzene QS- Methyl-phenyl-hexane), I- [I'-methoheptyl] -benzene (jS-phenyloctane) or 4-oxy-I- [diisopropylcarbon] -benzene (dipropylcarbin-phenol), 4-secondary octylphenol (/ S-phenyl- isoamyl alcohol) etc.

In the case of the compounds mentioned, the secondary carbon atoms are particularly processes for finishing synthetic resins due to the irradiation
of cellulosic! Textile material

Applicant:

Heberlein & Co. A. G., Wattwil (Switzerland)

Representative: Dr.-Ing. PK wooden houses,
Patent attorney, Offenbach / M., Herrnstr. 37

Claimed priority:
Switzerland of May 8, 1959 (No. 73 031)

Dr. Fritz Münzel, Wattwil (Switzerland),
has been named as the inventor

easily removable so that radicals can form at this point. On the one with the mentioned connections Pre-treated cellulose material can therefore form radicals much more easily than on untreated cellulose material Cellulosic material, which means that lower doses of radiation are used and therefore less Degradation of the cellulose is achievable.

After the irradiation of the pretreated textile material, the graft polymerization with a polymerizable monomeric substance. Since the pretreatment makes them more accessible Active groups are formed, can also not be polymerized on this modified textile material grafting chemical substances on with simultaneous exposure to heat relatively easily.

The polymerizable monomeric substances are primarily vinyl or allyl compounds into consideration, e.g. B. acrylates, methacrylates, styrenes, vinyl acetates, vinyl chloride, vinylidene chloride, and more Ethylene, butadiene, isoprene and mixtures of the monomers mentioned with one another. These monomers are applied to the textile material in the form of aqueous solutions or dispersions.

Also non-polymerizable or fully polymerized chemical substances or substance mixtures can be applied to the textile material in the form of an aqueous solution or dispersion before irradiation will. But they can also be applied after the irradiation, but with one The textile material needs to be heated for the purpose of chemical bonding of the substances to the textile material is. There are z. B. individually or in

309 670/298

Mixtures of quaternary ammonium compounds, phenols, silicones and dyes of all classes, organometallic compounds such as tributyltin oxide, phenylmercury metaborate, tributyltin acetate etc., polymers such as polyethylene, polymethacrylates, polyvinyl chloride etc., as well as plasticizers, such as B. triethanolamine salt of oleyl sarcoside, cetyldimethylbenzylammonium chloride, Stearyltriethanolamine, stearylethylenediamine amide formate.

The present method can be used in the textile field for achieving the most diverse Purposes. These include improvements in fiber strength, Increasing the resistance to biodegradation and pollution, Water absorption, exposure to chemicals or heat, variation in diffusion properties against air and water, further changes in swellability and thermoplastic Properties.

Gamma radiation or X-ray radiation are primarily considered as ionizing radiation; for the gamma radiation serve as a radiation source z. B. Co ⁶⁰ , cleavage products of XJ235 or Cs ¹³⁷ . The textile material can, for. B. be irradiated with a radiation source for a period between a few seconds and several hours. The grafting with the chemical substances applied to the textile material after the irradiation can take place immediately after the exposure to the ionizing radiation or 1 week to a few months after the exposure to radiation.

The irradiation can, depending on the effect to be achieved, in the presence or absence of atmospheric oxygen take place. In the latter case, the irradiation is expedient in a vacuum or in a inert gas made.

The invention is explained in more detail using the following exemplary embodiment:

A fabric made of copper rayon is placed in a solution of p-isopropylbenzoyl chloride in pyridine, mixed in a ratio of 2: 8, for 2 to 3 minutes and squeezed off to 100%. The thus treated fabric is heated for 5 minutes at 70 to 8O ⁰ C, thereafter is washed and dried. The tissue pretreated in this way is ^{irradiated with a Co 60} gamma radiation source for 15 minutes, so that a total dose of 1.1 · 10 ⁶ X-rays is irradiated into the tissue. The tissue is stored for some time at ordinary room temperature and loaded thereon with a 10% aqueous solution of methacrylic acid in the presence of 0.1% ferrous ammonium sulphate, 1% glucose and 0.1% dihydroxyacetone (all based on water) and at 20 ⁰ C left evacuated. After about an hour of exposure, the tissue shows a substantial increase in weight.

Claims (2)

PATENT CLAIMS: 1. Process for the synthetic resin finishing of cellulosic! Textile material by grafting on chemical substances under single or multiple exposure to ionizing radiation, which form active groups capable of the grafting reaction in the molecular chains of the cellulose, characterized in that the cellulose-containing textile material before irradiation and grafting with an aromatic chlorine compound, which in o- , m- or p-position an aliphatic substituent with secondary carbon atoms, in particular isopropyl groups, is treated. 2. The method according to claim 1, characterized in that the textile material with p-isopropylbenzoyl chloride is pretreated. Considered publications:
German Auslegeschriften No. 1,042,521.1 084233; French patents No. 1 125 537,
1,130,099, 1,130,100;
Austrian Patent No. 198 423;
British Patent No. 802 620;
"Die Kunststoffe", 1958, pp. 393 to 402. © 309 670/298 8.63