DE1101347B - Process for the flame-retardant finishing of light fabrics, which consist entirely or mainly of cellulose - Google Patents

Description

GERMAN

The present invention relates to a method for the flame-retardant finishing of light fabrics, in particular of laundry items for women and children, e.g. B. of light cotton fabrics such as flannelette.

It is the aim of the invention, in spite of the impregnation with the flame-proofing antimony trioxide associated stiffening by. To compensate for the addition of plasticizers, but with the washing resistance the impregnation must not be lost.

This is achieved by impregnating the light fabric with an aqueous suspension containing, based on the solids of the dispersion, 10 to 20% of antimony trioxide, 30 to 50 ° / ₀ plasticizers and the rest of polyvinyl chloride or similar polymers such as polyvinylidene chloride or copolymers of vinyl chloride and vinylidene chloride or mixtures of these polymers. In this dispersion, the plasticizer should consist of non-chlorine-containing plasticizers and up to 50% chlorine-containing plasticizer, and the chlorine content of the plasticizer mixture should be at least 15 percent by weight, preferably at least 20 percent by weight, chlorine.

The impregnated fabrics are treated to fix the impregnation at about 110 to 15O ⁰ C.

The masses proposed so far give the treated fabrics a certain stiffness. This is at heavy tissues, e.g. B. canvas, not objectionable and can even be beneficial. Such an impregnation but with light cotton fabrics, such as flannelettes, which are used for the production of garments, especially used for women and children, completely unusable.

The term "non-chlorine-containing plasticizer" means any plasticizer that is customary used in the manufacture of polyvinyl chloride. Such plasticizers can be flammable be, such as B. dioctyl phthalate and dioctyl sebacate.

Chlorinated paraffins or chlorinated diphenyl should preferably be used as chlorinated plasticizers.

Using a chlorine-containing substance as a component of the plasticizer has two advantages:

1. Since it is not flammable itself, it allows the incorporation of a higher content of plasticizers to the extent that it would otherwise be permissible, so that the equipment given to the fabric is a softer one with simultaneous flame retardancy.

2. The above-mentioned chlorine-containing softeners give the textile a softer finish than equivalent amounts of other non-flammable plasticizers such as tritolyl phosphate.

Examples of fire-retardant compositions to be used according to the invention are given below. With Fabric finished with these measures retained its fire-retardant property and its soft hand, too

Procedure for flame-proof equipment

of light fabrics,

which in whole or in part

consist of cellulose

Applicant:

Associated Lead Manufacturers Limited,
London

Representative: Dipl.-Ing. G. Weinhausen, patent attorney,
Munich 22, Widenmayerstr. 46

Claimed priority:
Great Britain 9 May 1955

Norman John Read, Greenford, Middlesex

(Great Britain),
has been named as the inventor

after repeated washing and rubbing, and also after being dry-cleaned was. In all examples the amounts are amounts by weight.

example 1

The mass consisted of 44 parts by weight of polyvinyl chloride latex (52% polyvinyl chloride and 48% water), 44.6 parts of plasticizer, consisting of a mixture of equal amounts by weight of dioctyl phthalate and 65% strength chlorinated diphenyl (as a 65% aqueous emulsion) and 11.4 parts of antimony trioxide. The crowd was taking Use of 4 parts of a 60% paste of dioctymodium sulfosuccinate as an emulsifier and as Emulsion stabilizer of 2 parts of a 2% aqueous solution of sodium carboxymethyl cellulose in Water emulsified.

Plasticizer mixtures of 75% dioctyl phthalate and 25% chlorinated diphenyl can also be used here or from 66% dioctyl phthalate and 34% chlorinated diphenyl can be used.

Example 2

Containing a mixture of 362 parts of dioctyl phthalate and 362 parts of chlorinated paraffin with 45% chlorine 2 parts of Dioctyhiatriumsuccinat, was with

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367 parts Sb ₂ O ground ₃ and then with 2057 parts of polyvinyl chloride latex (see. Example 1) and 500 parts of water with 5 parts of a 60% paste of dioctyl sodium succinate in water and 25 parts of a 2 ° / ₀ aqueous solution of sodium carboxymethylcellulose emulsified.

Example 3

The emulsion was prepared from 2057 parts of polyvinyl chloride latex in accordance with that given in Example 2 (See. Example 1), 544 parts of dioctyl phthalate, 180 parts of chlorinated paraffin with 54% chlorine and 367 parts of antimony trioxide.

The emulsion prepared according to the above examples can, if desired, be diluted with water prior to application to the fabric. It can be applied by dipping the fabric into the dispersion and then removing the excess liquid with a wringer. After the treatment, the fabric is treated by heating it to about 110 to 150 ^° C. in an oven. The heating time depends on the amount of moisture retained in the fabrics and can vary from about 2 to 10 minutes.

The method according to the invention can also be applied to all light fabrics made of cellulose material exist or contain a substantial part thereof.

Claims (1)

Claim: A method for the flame-retardant finishing of light fabrics, which consist entirely or mainly of cellulose, with plasticized polyvinyl chloride and antimony trioxide-containing aqueous dispersions, characterized in that the fabric is impregnated with the dispersion of a mass which, calculated on the solids content, 10 to Contains 20% antimony trioxide, 30 to 50% plasticizer and the rest of polyvinyl chloride or similar polymers, the plasticizer consisting of a mixture of a non-chlorine plasticizer and up to 50 percent by weight of a chlorine plasticizer, so that the chlorine content of the mixture is at least 15% , and finally subjects the fabric to post-heating to about 110 to 150 ^{° C.} Considered publications: U.S. Patent Nos. 2,591,368, 2,536,978; H. Hadert, New recipe book for the paint and lacquer industry, Volume I (1952), p. 79; Brochure from the company Farbenfabrik Bayer, Leverkusen "Clophen A 60"; Gnamm, "The Solvents and Softeners" (1950), p. 442.