Patent GB-544157-A (GB)
Title: Improvements in preparations for treating fibrous materials
IPC: C09K23/00
Filed: 1940-06-12
Abstract: 544,157. Emulsions. SOC. OF CHEMICAL INDUSTRY IN BASLE. June 12, 1940, Nos. 10232 and 10233. Convention dates, June 12, 1940 and April 29, 1940. [Class 1 (i)] [Also in Group IV] Stable paste-like emulsions suitable for application especially as printing or finishing preparations, to textile and other fibrous materials, e.g. paper, leather or wood to obtain printing and finishing effects fast to washing and to rubbing, comprise, as aqueous phase, an aqueous solution containing formaldehyde, an alkali caseinate, and one or more additional substances capable of forming hardenable condensation products with formaldehyde, e.g. urea, thiourea, guanidine, dicyandiamide or melamine, the amount of casein in this phase being not more than 12 per cent, and as oily phase, an organic liquid, immiscible with water, of boiling-point not substantially below 100C. or substantially above 250C. All or part of the formaldehyde may be added after the emulsification of the organic liquid. Specified organic liquids, immiscible with water, are white spirit, " Sangajol " (Registered Trade Mark), xylene, chlorobenzene and tetrahydro-naphthalene. Additional bind. ing agents, soluble in water or in oil, e.g. rubber or its derivatives, drying oils, varnishes or hardenable artificial resins, may be incorporated in the pastes. In examples, (1) xylene is emulsified in an aqueous borax solution containing casein, urea and finely dispersed titanium dioxide, the emulsion is diluted first with water and then with aqueous formaldehyde and the resulting paste is allowed to stand until viscous and then printed on cotton or cellulose acetate artificial silk, the print being dried for 3 minutes at 60C. and heated for 5 seconds at 150C. to produce a damask effect fast to washing with soap at 90C.; (2) a solution of raw rubber in chlorobenzene is emulsified in an aqueous solution of borax containing casein, urea and thiourea and pigmented with lampblack, the emulsion is diluted first with water and then wth aqueous formaldehyde and printed on a cotton fabric and the print is dried in the air for 24 hours and heated for 5 seconds at 150C.; (3) " Sangajol containing boiled linseed oil is emulsified in an aqueous solution of borax containing casein and urea and pigmented with Permanent red 4R, the emulsion is diluted first with water and then with aqueous formaldehyde and the resulting past is allowed to thicken on standing and printed on a fabric, e.g. of viscose artificial silk; the print is heated for 5 seconds at 150C. and hung for 24 hours to allow the linseed oil to dry; (4) a mixture of chlorobenzene and tetrahydronaphthalene is emulsified in an aqueous solution of borax containing casein, urea and thiourea and pigmented with Indanthrene brilliant green B, the emulsion is diluted first with water and then with aqueous formaldehyde and the resulting paste, after standing for some days is printed on a fabric, e.g. of cotton and the print is steamed for 5 minutes and heated for 5 seconds at 150C.; (5) a solution of chlorinated rubber in white spirit is emulsified in an aqueous solution of borax containing casein, urea and guanidine and pigmented with copper phthalocyanine, the emulsion is diluted first with water and then .with aqueous formaldehyde and the resulting paste is printed on a fabric, e.g. of spun viscose fibres, and the print is passed through a hot calender at 160C.; (6) chlorobenzene is emulsified in an aqueous dispersion of Hansa yellow G in a viscous solution made by adding water to a gel obtained by adding aqueous formaldehyde to an aqueous solution of borax containing casein, urea, thiourea and formaldehyde and allowing to stand; the emulsion is printed on a fabric, e.g. of cotton or viscous artificial silk, and the print is dried and heated for 30 seconds at 150C.; (7) a solution of raw rubber is chlorobenzene is emulsified in a viscous aqueous solution neutralised with borax, made by adding water to a gel obtained by adding a solution of melamine in aqueous formaldehyde to an aqueous solution of borax containing casein and urea and allowing to stand for 24 hours; into this emulsion is admixed a preparation made by grinding Cibanone blue RS with an aqueous solution containing casein, borax and urea, and cotton or viscose artificial silk is printed with the mixture and the print is heated for 40 seconds at 155C. The Specification as open to inspection under Sect. 91, comprises also the manufacture and use of similar emulsions not containing any additional substance capable of forming hardenable condensation products with formaldehyde. This subject-matter does not appear in the Specification as accepted.