SU6388A1 - The method of preparation of oil varnishes - Google Patents

Description

Known methods for producing oil lacquers consist of dissolving fossil resins (copals) or garpius and its derivatives in flax or other drying vegetable oil. For this purpose, hot methods of producing varnishes have long been introduced into practice, since flax or other drying vegetable oil provides reliable complexes with resins only at very high temperatures. Oils and resins undergo a partial chemical rearrangement between themselves, and also participate in varnishes in the original or polymeric forms.

The proposed method of cooking varnishes proceeds with a greater expenditure of time and is based on completely different chemical-physical processes, namely, on the participation and influence of: oxygen, -catalysts, desiccants, peroxide groups of turpentine, and, consequently, ozone, forming at the time of passage oxygen through turpentine solutions of mixtures, and, finally, on the prolonged effect of moderate temperature on the mixture. In addition, the proposed method does not require expensive fossil smolkopalov, since the solid colloidal lacquer constitutes most of the vegetable drying oil itself, together with the lacquer of elasticity quality and the necessary hardness; For a row with high elasticity and large extensibility coefficient, lacquer films withstand regular sanding with water and have a specularly smooth and smooth surface. The lacquers themselves differ from expensive copal lacquers in that they have the ability to give enamelled or elastic paints with small paints, lacquer paints that are durable from atmospheric conditions.

Example 1. A mixture consisting of approximately equal parts;

1) oxidized drying vegetable oil,

2) ordinary, well-settled flax oil and

3) turpentine,

subjected to prolonged air treatment in the presence of

catalisauoooo-desiccants, for which, for example, a mixture of air is passed through the mixture for several days at a temperature not exceeding 50 ° C; this causes thickening and significant discoloration of the mass, which, if desired, is diluted with turpentine or other solvent and is used as a varnish.

The proportions of the ingredients involved can be varied as desired.

Example 2. A mixture of, contained, about, equal parts:

1) polymerized linseed oil,

2) turpentine or containing, its peroxide solvent groups and

3) compacted - oxidized at elevated temperature to dry, its vegetable oil is subjected to continuous treatment with air at a temperature not exceeding 50 ° C in the presence of desiccant catalysts, for which, for example, a stream of air is passed through the mixture for several days; at the same time there is a thickening of the mixture and its noticeable discoloration. The resulting lacquer is used alone or mixed with a solvent.

Example 3. The experience of drying is the same as the 1st and 2nd, but with the participation of garnius or its derivatives, at that the derivatives of garnius can be introduced into the process at the beginning or at the end of the experiment, the same unsubstituted resins, for example, ordinary A harpyius is necessarily introduced at the beginning of the process and is involved in the air treatment at the same time as the other ingredients.

The subject of the patent.

1. A method of preparing oil lacquers, characterized in that a mixture of ordinary and oxidized drying oils, or polymerized and condensed-oxidized drying oils with turpentine, with the addition of drying agent, is subjected at a temperature not exceeding 50 ° C to oxygen or air by blowing, spraying or strong mechanical agitation.

2. At the method indicated in paragraph 1, the addition of a harpyus or its derivatives (compacted harpyus, its ethers, etc.) to the mixture.