SU771124A1 - Solvent composition for polychloroprene rubber - Google Patents

Description

The invention relates to the plastics industry, in particular to the development of a polychloroprene rubber solvent composition. The solvent composition of polychloroprene rubber is known to produce an adhesive, including ethyl acetate, gasoline, and an organic oxygen-containing compound, for example 2-benzyl-3-methyl-2, 3-dihydrothiophene dioxide-1, 1, for example, in a ratio of 5049: 1 1 . However, this composition allows to obtain glue for a long period of time (2.3-2, H), and in addition, the viscosity of the adhesive based on it is 405-510 s. The purpose of the invention is to reduce the time of glue production and reduce the viscosity of the glue. The goal is achieved by the fact that the composition of the solvent of polychloroprene rubber to obtain glue, including ethylene acetate, gasoline and organic oxygen-containing compound, as the last composition contains 1-methyl-3-2-methyl-2- (m-isopropenylphenyl) -ethyl} -pyrrolidone-2 pr the following content of components, wt.%: 39.7-59.9 Ethydetate 40-59.6 Gasoline I 1-Methyl-3-2-methyl-2- (m-isopropenylphenyl) -ethyl} -pyrrole0 , 1-0.7 don-2 1-Methyl-3-2-methyl-2- (m-isopropenylphenyl) -ethyl-pyrrolidone-2 is introduced into the solvent after displacement of gasoline and ethyl acetate. Pour 1/3 h of the required solvent in the mixer and pour the chopped adhesive mixture into the mixer. As the mixture is dissolved, the solvent residue is added in parts, the Indencomarone resin is introduced into the finished adhesive in the form of a 20% aqueous solution in ethyl acetate. With the introduction of the adhesive mixture into the solvent, 1-methyl-3-2-methyl-2- (m-isopropenylphenyl) ethyl 3-pyrrolidone-2 is distributed at the surface of the mixture. Its high polarity leads to activation of the solvent and increases the dissolution rate of the adhesive mixture. The interaction of 1-methyl-3-2-methyl-2- (m-isopropenylphenyl) -ethyl-pyrrolidone-2 with polychloroprene leads to a decrease in the viscosity of the adhesive. The dissolving time and viscosity of the adhesive depend on the quantitative ratio of the ingredients of the proposed solvent. Example 1 is comparative). Leftover solvent based on olichloroprene includes, g: ethyl acetate 40, gasoline 59.9J 1-methyl-3- | 2methyl-2- {m-isopropenylphenyl) -ethyl pyrrolidone-2 0.1. Example 2 (comparative). : leaving the solvent the same as in the reamer 1. The difference is in that the solvent includes: g: ethyl 50) gasoline .49.9. Example 3. The composition of the solvent is the same as in example 1. The difference is that the solvent includes, g: ethyladetate 59.9, gasoline 40. Example 4. The composition dissolve 1 I am the same, but the solvent includes: -: ethyl acetate 59, 6; gasoline 39.7; 1-methyl-3-12-metsh1-2- (m-isopropenyl1) enyl) -ethyl} -pyrrolidone-2 0.7. Example 5. The composition of the solvent is the same as in Example 1. The effect is that the solvent includes, g; ethyl acetate 49.6 gasoline 49.7; 1-methyl-3-2-methyl-2- (m-isopropenylphenyl) -ethyl-pyrrole don-2 0.7. Example 6. The composition of the solvent is the same as in Example 1. The difference is that the solvent includes, g: ethyl acetate 39.7, gasoline 59.6; 1-methyl-3- 2-methyl-2- (m-isopropenylphenyl) -ethylJ-pyrrolidone-2 0.7, Example 7 (comparative. The composition of the solvent is the same as in example 1. The difference is that the solvent includes, g: ethyladetate 39; gasoline 39, 1-methyl-Z-2-methyl-2- (m-isopropenylphenyl) -ethyl / d-pyrrolidone-2 2. Example 8 (comparative). The composition of the solvent is the same as in Example 1. The difference is that the solvent includes, g: ethyl acetate 49, gasoline 49, 1-methyl-3-2-methyl-2- (m-isopropenylphenyl) -ethyl-pyrrolidone-2 2. Example 9 (comparative ). The composition of the solvent is the same as in the example 1. The difference is that the solvent includes, g: ethyl acetate 39, gasoline 59, 1-methyl-3-2-methyl-2-m-isopropenylphenyl) ethyl, pyrrolidone-2 2. Data on viscosity and time of preparation glue presented in the table.

Gepler viscosity and viscosity of the adhesive on the solvent composition

Famous

1 comparative

 3 4 5

Proposed

7 comparative

m P

eight

9

405-510

, 3-2,8

428

2.4 395 2.3 383 2.2 370 2.1 355 2.1 2.2. 378

2.3

399 2.4 405 2.4

Claims (1)

435 Table according to Göpler's viscosity of the adhesive is determined using a VN-type device. The diameter of the quartz ball for measurements is 15 MP. The table shows that the introduction of 1-methyl-3 2-methyl-2- (m-isopropenylphenyl) ethyl ethyl-pyrrolidone-2 pre-glue into the solvent reduces the time for its preparation to 2.1-2.2 h and reduces glue viscosity up to 355 s. The use of the proposed solvent composition in the preparation of glue provides, in comparison with the existing ones, the following advantages: a) shortening the production time, which allows increasing the productivity of the available capacities, b) the ability to adjust the viscosity of the glue for various applications. The invention Composition of polychloroprene rubber solvent for making glue. comprising ethyl acetate, gasoline, and an organic oxygen-containing compound, characterized in that, in order to reduce the time it takes to make the glue and reduce the viscosity of the glue, as the oxygen-containing compound, the composition contains 1-methyl-3-2-methyl-2- (m-isopropenylphenyl) -ethyl-pyrrolidone-2 with the following content of components, wt.%: 39.7-59.9 Ethyl acetate 40-59.6 Benzine, 1-Methyl-3-12-methyl-2- (m-isopropenylphenyl) -ethyl - pyrroli, 1-0.7 don-2 Sources of information taken into account during the examination 1. Application number 2664444 / 23-05, cl. C 08 L 11/00, 09/01/78, on which a decision was made to issue an author's certificate (prototype).