SU65362A1 - The method of obtaining thermosetting aniloaldehyde resins - Google Patents

Description

 During the condensation of aniline with formaldagide, depending on the com- pounds of the alkyl-aldehyde ratio and the amount of acid catalyst, various condensation products are formed. Fusible and dissolvable resins are formed in the presence of an inorganic amount of acid, and infusible, plastic-based aggre- gations and llore: products are usually obtained with condeisation, and with formaldehyde anilyl ia.

Released relatively recently in Switzerland on the European market, a similar product called cybanite represents: it extends the condensation of aniline hydrochloride with formaldehyde. The preparation of such a product is described, in German iatente LU 594296 "l. 39b, 22

Characteristic properties of fusible and hot-smelt | h x aiyl-formaldehyde resins; their insolubility is E alcohol, benzene, and solution: in chlorosis, methane hydrocarbons, or mixtures thereof with benzolide. Plastic in natreto, state, non-smelting and insoluble products. of condensation over this germany.

Iatenta or Margins' thermal durability is not more than 105, which is different from phenoplasts in the herd of cutting, and when pressing aniline plastics after pressing 155-160 °, cooling of the mold to 140 ° is required.

The authors of the present invention have obtained new anilino-aldehyde resins of a new type of complex condensation of a dey, with aldehyde and furfuro; ioM. This method can be used to produce weakly thermo-reactive, like thermoplastics. ;; thermoreactive, similar resolidG.

For the case of resins of the first resin; it condenses with formaldehyde and furfurol in the presence of a relatively small amount of m: 1bl or organic acids, and for the resulting: non-melted,: 1Aust1; hen and e; a k o p i ra r t r o p ii

a n 1 l i; N o (3 o and o O.T.

1 ms. ;; en; ILI-1.

, 5 mole formaldehyde,

1 mole of furfu1p: osh, 5% by weight of “aiidine phthalic anhydride.

Phthalic (anhydride dissolves when heated in aniline and at a temperature not exceeding 50 ° C. 20-40% formalin is added with stirring. After all the formalin has been introduced, furfural is gradually added and the anhydride and formaldehyde formed from KQIMPLEK). Phthalic zng, iodrida. —It is best done by flushing the resin with hot WATER, in the presence of emulgators, in the form of soaps or salts of sulfonic acids.

According to the above recipe, a resin is obtained; when heated to 150 ° C, the resin passes into: infusible state for 3-4 minutes; the addition of hexamethylenetetramine or paraformal accelerates the curing process, but still proceeds relatively slowly. The above are dissolved in an alcohol-benzene mixture.

Example 2. Preparation of resins that go to non-melting and non-melting state. 1 mol of aniline, 1.2 mol of hydrochloric acid, 1.2 mol of formaldehyde, 10-15% by weight of aniline furfural.

Aniline neutralizes 1 with technical 1OOL acid, and then diluted with water (FROM calculating 2 parts of water to 1 part of aniline sunflower layer. Graduated administration with stirring) in; slowly, ENF is added furfural, after which the reaction mixture is neutralized with iodine solution Htri this is a yellow product falling as a yellow powder: condensation: pii, which is then mixed, is washed with WATER and dried under vacuum to remove water and volatile products.

Obtained noi Opisanno.mu above criodo6y product 1Condensation and clean; M without napoliitel during hot pressing gives plastic materials with Martens heat resistance 130-140 ° with high electrical insulating properties and strength and dynamic bending 6-7 kg / cm.

The materials obtained according to the invention are pressed without cooling the molds.

Item - of the draft

The method of obtaining thermosetting: OH aniloalgidnykh resins, which is different from that LILIN or its water-soluble salts: ROH eHcinpyioi with formaldehyde and furfural or their derivatives.