SU12700A1 - The method of obtaining varnishes - Google Patents

Description

The proposed method has the task of obtaining lacquers from the delocalis and hydroxyacids, obtained by the oxidation of glyderido E fatty acids or mineral oils.

The preparation of hydroxy acids from fatty acid gliderides is as follows: hardened linseed oil (linoxin) is washed down, fatty acids are released by acid decomposition, and insoluble hydroxy acids are separated from the mixture of selected acids by dissolving in gasoline. These hydroxy acids have a comparatively low iodine number of 47.650, O, capable of polymerizing with long-term heating and producing a hard film that is sticky.

The production of hydroxy acids from mineral oils, for example, petroleum oils is as follows: distillate oil beats. a weight of 0.882 in the presence of oil soluble heavy metal salt catalysts is oxidized at a temperature of 140-150 ° C to form 10-15 / 3 acid. The acids are liberated from the distillate with alkali, the soaps are decomposed with mineral acid, and insoluble hydroxy acids are extracted from the mixture of crude acids by treatment with gasoline. Hydroxy acids derived from petroleum oils have an iodine number of 15-40, with prolonged heating they are capable of polymerizing and producing a solid lacquer film, which has the same disadvantage as hydroxy acid films separated from fatty acid gliderides, i.e., stickiness.

To eliminate the stickiness of the films obtained, solutions of malulose esters are added to the hydroxy acids.

Example 1. 10 parts of an ordinary technical delloid are dissolved in a mixture of acetic methyl ether and mono-chloro-benzene (90 parts of acetic methyl ether and 10 parts of mono-chloro-benzene). The above solution is mixed with an equal amount of a 40 / o-th solution of hydroxy acids in the addon. In this case, hydroxy acids are used, which are obtained by the oxidation of distillate of oil having beats. weight 0.882, but according to the method given at the beginning of the description.

The lacquers obtained in the above manner, tinted to the desired color, can be used for varnishing nrovoloki, impregnating fabrics, etc.

A modification of this method is that, to the hydroxy acids, solutions of natural or artificial high-melting resins are added instead of the delocal effect.

To speed up the drying and the formation of a more roll film, the usual siccatives are introduced into the KOBUtE solution: resin, lead, manganese or cobalt.

Pp mme p 2. 40 parts of hydroxy acids obtained by oxidizing fatty acids of linseed oil by blowing air, liberated in the usual way from fatty acids that are not combined with oxygen, are dissolved in 60 parts of ethyl alcohol. The resulting solution of hydroxy acids is mixed with a 40 / n - n solution of rosin, oxidized with air for 30 hours at a temperature of 150-180 ° C. Instead of the oxidized rosin, you can take a high-melting phenolic resin obtained by condensing phenols with aldehydes but not containing free formaldehyde and not releasing it when heated. To accelerate drying, cobalt resin is added to the mixture of the above solutions.

Example 3. 40 parts of hydroxy acids obtained by the oxidation of hydrochloride distillate beats. weight 0.882, dissolved in 100 parts of benzene. The resulting solution is mixed with a 400 / nth benzene solution of the palate of coal tar. Conventional dryers are added to speed drying.

Example 4. 50 parts of hydroxy acids obtained by the oxidation of flaxseed fatty acids and separated from unsaturated acids are dissolved in 80 parts of ethyl alcohol and mixed with (, an alcoholic solution of a solid resin, condensed by condensation of phenols with aldegas).

By. Lacquers using the method described above can be applied to cover cardboard, paper, cloth, tin, etc.

The subject of the patent.

1. A method for producing lacquers from cellulose ethers and hydroxy acids, characterized in that solutions of cellulose ethers are added to hydroxy acids obtained by the oxidation of fatty acid glycerides or mineral oils.

2. Variations of the method indicated in paragraph 1, characterized in that solutions of natural or artificial high melting resins are added to the hydroxy acids, instead of cellulose ethers.