Abstract:
The invention relates to condensation products based on substituted ureas, their preparation and their use. These condensation products each contain at least two cyclic urea units and can be prepared either by reacting primary diamines or polyamines with ureas and subsequently reacting the products with predominantly C-H-acidic aldehydes or by reacting primary amines with isocyanates and subsequently reacting the products with predominantly C-H-acidic aldehydes in the presence of acidic catalysts. These condensation products are suitable for the preparation of heat-curable coating compositions and for the preparation of binders for cathodic electrodeposition coating.
Abstract:
A process for the preparation of a stable aqeuous ketone resin or ketone/aldehyde resin dispersions and a process for the production of surface coating binders. For this purpose, a melt or a highly concentrated solution of the ketone resin or ketone/aldehyde resin is dispersed in water in the presence of an organic protective colloid. These aqueous resin dispersions can be used, in combination with other film formers, as surface coating binders.
Abstract:
O.Z. 0050/034411 A process for the preparation of a textile finish, the finish thus obtained and its use for the easy -care finishing of textiles containing, or consisting of cellulose. The finish comprises an aqueous solution, of from 30 to 70 per cent strength by weight, of a mixture of the conventionally methylolated (= hydroxymethylated) carbamates I and II I II where R is hydrogen or alkyl of 1 to 4 carbon atoms, in the weight ratio I : II of from 1 : 1 to 1 : 20. The finish is prepared by reacting a glycol or an alkylgylcol of the formula III R-(OCH2-CH2)9-100-OH III where R has the above meanings, and isobutanol with urea at above 100.degree.C, so as to eliminate ammonia and produce carbamates, and methylolation with formaldehyde. In a first stage, the glycol or alkylglycol of the formula III is reacted to the extent of at least 50% with urea, in the absence of a catalyst; at from 130 to 160.degree.C, to give the carbamate I, and in a second stage, carried out either in the presence of an ion exchanger containing nickel ion at from 130 to 165.degree.C, or in the absence of a catalyst at from 150 to 200.degree.C the carbamate mixture in the weight ratio I : II of from 1 : 1 to 1 : 20 is prepared by addition of isobutanol and further urea.
Abstract:
Condensates containing urea and formaldehyde in a molar ratio of from 1:2.5 to 1:4.5 are converted into wood glue by allowing the viscosity to increase at a pH of from 1 to 3 and at only slightly elevated temperature and then adding urea at a pH of 7 to 9.
Abstract:
1415206 Textile-treating urea-formaldehydeglyoxal resins BADISCHE ANILIN- & SODAFABRIK AG 2 March 1973 [3 March 1972] 10214/73 Headings C3R and C3P [Also in Divisions D1-D2] A textile-treating resin is obtained by condensing urea with formaldehyde in a 1 : 2-10 molar ratio in aqueous solution at pH 7-10 and 20-80 C. for 0À5-4 hours, then at pH 31-5 and 20-100 C. until 5 drops of the solution produce turbidity in 10 ml. of 50% aqueous MgSO 4 .7H 2 O, then adding urea, glyoxal and optionally formaldehyde and heating at pH 5-7 and 20-60 C. for 1-6 hours, the final molar ratio of urea : formaldehyde : glyoxal being 1 : 1À5-2À5 : 0À3-0À6. In Examples 1-4 initial condensates of U : F ratio 1 : 4 are acidified with H 2 SO 4 or H.COOH to pH 3À5 to 4À8, heated at 35-90 C. for 20 mins to 4 hours and neutralized with NaOH; urea and glyoxal (and in Ex. 4 formalin) are added and the mixture heated at 50-55 C. for 3-4 hours; the U : F : G ratios of the products are 1 : 2-2À24 : 0À4-0À5. In Examples 5-7 cotton fabrics are treated with aqueous compositions containing the product of Ex. 2 or 3 and MgCl 2 alone or with a polyethylene emulsion or polyvinyl acetate/ starch mixture.