SU148472A1 - The method of preparation of chloroprene glue number 88-H - Google Patents

Description

Glue No. 88-H is not stable enough and when stored for 1.5-2 months (instead of three but normal), it coagulates.

In order to stabilize glue No. 88-Н, it is proposed to use nitrosprites in the number of n / a by weight of glue. At the same time, the shelf life of glue without noticeable changes in its quality increases to 10 months:

The proposed stabilizers have the following physico-chemical properties (see table. 1):

The stabilizer was introduced into the solution of glue No. 88-H of the following composition (in wt.%):

PRP 104316,5

resin 10113.5

gasoline "Galosh 23.3

ethyl acetate46.7

A mixture of IRP 1043 has the following composition: on 100 weight. rubber rubber

Nairit A or B100.0 81.97

altax2.0 1.64

diphenylguanidine 1.0 0.82

magnesia burned 12.0 9.83

zinc white5.0 4.10

Rosin2.0 1.64

Rubber glue was prepared by dissolving a mixture of PRP 1043 in ethyl acetate and gasoline Galosh, taken at a ratio of 2: 1 by adding pine resin 101. A stabilizer (1% by weight of glue) was added to the glue solution.

weight. %

Glue from the production batch was stabilized; the samples were stored in one-liter cans at 15-25 °. Periodically, within 10 months, visual observations were made.

The results of the physicomechanical tests of adhesive No. 88-H before and after storing it for 10 months are given in Table. 2

table 2

Notes: 1. Adhesive No. 88-H without stabilizer was coagulated after 40 days, with stabilizer 2-nitro-2-methyl-3-butanol signs of coagulation over Vilis B 1 months of storage; no signs of coagulation with adhesive №88-H with other stabilizers were observed.

2. The increase in dry residue is apparently caused by frequent opening of cans with glue samples.

From table 2 it follows that after storing glue No. 88-H with a stabilizer, its physical and mechanical parameters were within the normal range.

As a result of the research, it was also found that with the introduction of stabilizers similar to those described in the composition of rubber adhesives based on polar rubbers, it is possible to change the range of solvents and replace hot ethyl acetate that is harmful to health.

Subject invention

The method of preparation of chloroprene adhesive No. 88-H, characterized in that, in order to increase the stability of this adhesive, aliphatic nitro alcohols are introduced into its composition in an amount of 1% by weight.