SU542758A1 - Glue - Google Patents

Description

that With stirring, appropriate amounts of MAK and catalyst (SbCls) are added to the monomer. After the polymerization is complete, the reaction mixture is dissolved in benzene, the solution is cooled, and with cooling, dry ammonia is passed in to bind the catalyst and unreacted MAK, the resulting precipitate is filtered, the solvent and the monomer are removed in vacuo. Depending on the reaction conditions, the yield of the oligomer is 50-70%.

The resulting oligomers are characterized by molecular weight, bromine number, hydroxyl number, refractive index. In the infrared spectrum of oligomers, the absorption bands characteristic of the C – C double bond (1620–1640) cm – 1 of the hydroxyl OH– (3500 cm) group and the ether linkage (C – O – C) are 1200–1000 cm – i.

10 Experimental Results

are presented in table. one.

Table 1

The resulting oligomer (a-methacrylate-sholigooxypropylene glycol) (MOP), styrene and 1 wt. The% peroxide initiator is well mixed until the latter is completely dissolved and 1 weight% is added. The% filler (TiO2, previously calcined at 500 ° C), is again well mixed and poured into a glass ampoule for polymerization. The polymerization process is carried out in a drying oven, gradually raising the temperature. The filler is introduced at this stage to distribute it more evenly.

The resulting product was applied to the test surfaces and tested for resistance to peeling of samples glued together and aged under pressure for 10-12 hours.

For testing, specimens in the form of polyethylene (PE) plates of size 100 × 250 × 2 mm with an overlap of 1–5 cm, polyethylene films (PE) with a thickness of 50 μm, copper foil (F) with a thickness of 50 μm were used.

Example 2. The copolymerization is carried out analogously to example 1 in the presence of 0.5 weight. % TiOa.

Example 3. South oligomer with a molecular weight of 1200, 10 g of styrene, 1 weight. % dicumyl peroxide and 1 wt. % SiOg (Grozny silica gel, preheated at 150 ° C for 5 h) is stirred and polymerized as in Example 1.

The product is a light yellow sticky adhesive.

Compositions and properties

adhesives are given in table. 2-4.

table 2

Note: I. pdk-peroxide dicumyl, pb-peroxide benzoyl. 2. The filler was used in a box of 1 wt. % initiator 1 wt. %

The proposed composition is characterized by high adhesive properties, and these properties practically do not change with time.

Table 3

Table 4