A method of obtaining a film-forming copolymer

 

(57) Abstract:

The inventive obtaining a copolymer by copolymerization VAT residue of the distillation of styrene with 4 - 7 wt.% maleic anhydride and 2 to 15 wt. % fraction of pyrolysis C9 hydrocarbons with a boiling point of 130 - 220oC and certain qualitative composition. 3 table.

The invention relates to methods for film-forming polymers for paints and varnishes, in particular the production of film-forming copolymer of the bottoms of the distillation of styrene (KORS) and carbonyl compounds.

A known method of obtaining a film-forming copolymers by thermal copolymerization KORS with carbonyl compounds in which the carbonyl compounds using maleic anhydride (MA) /1/.

The disadvantage of this method is the low impact strength of the film obtained copolymer.

The closest to the essence and achieve results is a method for film-forming copolymers by thermal copolymerization KORS from 5 to 30% VAT residue of the distillation products hydroformylating olefins having a boiling point of 130 270oC (prototype) /2/. The disadvantage of such a joint venture which allows to use it for example, for the protection of offshore platforms.

The purpose of the invention increase solsticetm coatings based on copolymers Kors.

This objective is achieved in that according to the receiving film-forming copolymer by thermal copolymerization with AF CORSE, the reaction mixture was further added negidrirovannogo C9 fraction pyrolysis of hydrocarbons with a boiling point of 130 220oC, density 0,926 0,937 g/cm3, diene index of 11.5 13.5 g of iodine per 100 g of the sample in the amount of 2 to 15 wt. from mass KORS. The number of MA in the reaction mixture is 4 to 7 wt. from mass KORS. The process is carried out in an autoclave at 160 - 180oC for 6 h

The C9 fraction of the pyrolysis of hydrocarbons is a transparent light yellow liquid having the following composition, wt.

nonaromatic hydrocarbons 5,8 6,2

monoalkylbenzenes 12,0 13,0

phenylacetylene 0,19 0,23

styrene 8,0 8,4

atitool 7,6 8,0

Olivenza 1,0 1,1

mesitylene 1,8 2,0

pseudotumor 3,6 4,0

-methylsterol+TRANS-a - methylsterol 3,1 3,3

the Dicyclopentadiene 13,5 14,1

vinylcolor 11,4 12,0

1,2,3-trimethylbenzene 1,6 1,7

Adimari cyclo - and methylcyclohexene 26,4 23,5

inden 0,9 1,0

naftalinovogo component negidrirovannah C9 fraction pyrolysis of hydrocarbons in the temperature range of boiling point 130 220oC number of 2 to 15 wt. from mass KORS, and the amount of MA in the reaction mixture is 4 to 7 wt. from mass KORS.

The method is as follows.

In the load capacity specified number of COURSE of different composition (table. 1), MA and C9 fraction (table.2) and heated to 160 180oC under stirring for 6 hours Then unreacted products are distilled off under vacuum at 200oC. the Remaining solid resin dissolved in xylene to obtain a 40% aqueous solution, which is used for test coverage.

Carry out the determination of the softening temperature of the coating, the drying time of the applied layer.

Testing cholestanol plate with a deposited coating is dipped in a glass with 3% sodium chloride solution for 24, 72, 120 and 240 hours Then determine the fraction of the area of the ruined floor.

Example 1 (the prototype).

In the autoclave load of 100 g Corsa, containing, by weight. 21.3 styrene, 53.1 polymer, 8,3 a-methylstyrene, 0.1 divinylbenzene, 9,3 TRANS-stilbene and phenanthrene, 2,9 high-boiling components of the inhibitor. There also placed 10 g uldehitusmaterjale faction. The synthesis is carried out at 160 190oC for 6 hours after the reaction is distilled off narora the VA which are shown in table 3. The resin dissolved in xylene to obtain a solution with a concentration of up to 40 wt. The properties of coatings obtained by applying this solution are given in table.3.

Example 2. To 100 g Corsa (part 2, PL.1) add 5 g MA and 1 g C9 fraction (composition 2, PL. 2). The process is conducted as in example 1. The results are given in table.3.

Examples 3 to 7. The process is conducted as in example 1, while varying the number of fractions C9 of part 2, PL.2.

Examples 8 to 12. Experiments are performed as in example 1. In the reaction mixture using different compositions Corsa and C9 fraction (see table. 1, 2 and 3).

Examples 13 to 15.

Experiments are performed to select the optimum ratio KORS and MA in the reaction mixture.

In table. 3 shows the test results of a copolymer on the basis of the COURSE and MA at different compositions KORS and C9 fraction and different ratios KORS and MA in the reaction mixture.

The copolymers obtained in the MA content in the reaction mixture in amounts of 4 to 7 wt. from mass KORS, have the best properties. With increasing MA content of more than 7% coatings have good adhesion, but buy fragility. With decreasing content of MA to 3 wt. worse adhesion, which leads to reduced the tour softening of the copolymer increases the drying time of the coating. When reducing fractions C9 below 2 wt. not achieved a sufficient level of solsticetm polymer. The optimum content of C9 fraction in the reaction mixture is 2 to 15 wt. from mass KORS.

The composition KORS when changing in a wide range of practically no effect on the properties of film-forming copolymer.

A method of obtaining a film-forming copolymer by copolymerization VAT residue of the distillation of styrene with maleic anhydride, characterized in that the use of maleic anhydride in the amount of 4-7% by weight of the cubic residue of the distillation of styrene and optionally enter a fraction C9-pyrolysis of hydrocarbons with a boiling point of 130 220oWith having the following composition, wt.

Nonaromatic hydrocarbons 5,8 6,2

Monoalkylbenzenes 12,0 13,0

Phenylacetylene 0,19 0,23

Styrene 8,0 8,4

Atitool 7,6 8,0

Olivenza 1,0 1,1

Mesitylene 1,8 2,0

Pseudotumor 3,6 4,0

-Methylsterol and TRANS - a-methylsterol 3,1 3,3

The Dicyclopentadiene 13,5 14,1

Vinylcolor 11,4 12,0

1,2,3-Trimethylbenzene 1,6 1,7

Adimari cyclo - and methylcyclopentadiene 26,4 23,5

Inden 0,9 1,0

Naphthalene Else

in the amount of 2 to 15% by weight of the cubic residue rectificate the

 

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