Flame retardant polymer composition for coating

 

(57) Abstract:

The invention relates to a fire retardant intumescent coatings and can be used in the construction, automotive, chemical engineering. Describes flame-retardant polymer composition for coating comprising epoxygenase resin ED-20, ammonium polyphosphate, urea resin KF-W, - curable polyethylenepolyamine. The composition optionally enter the product dehydropolycondensation phenanthrene containing chromium, in the following ratio, wt.%: epoxygenase resin ED-20 81,97-59,89; ammonium polyphosphate 4,098-23,95; urea-formaldehyde resin KF-0,82 W-2,99; product dehydropolycondensation phenanthrene containing chromium, 0,82-4,19; polyethylenepolyamine 12,3-8,98. Technical result - increase the flame retardant properties of the polymer composition due to the increase in specific heat at the heating temperatures above 523 K and an increase in the density of coke. table 2.

The invention relates to a fire retardant intumescent coatings and can be used in the construction, automotive, chemical engineering, etc.

Most similar to the claimed invention has the resin KF-W and amine hardener - the polyethylenepolyamine. [RF patent N 2010620, class B 05 D 3/00, 1994).

The composition of the polymer composition, wt.%:

Epoxygenase resin ED-20 - 62,5-79,36

Ammonium polyphosphate - 7,94-31,75

Urea-formaldehyde resin KF-W - 0,79-3,97

The polyethylenepolyamine - 9,37-11,90

A disadvantage of the known flame-retardant resin composition is not sufficiently high flame retardant properties and high enough specific heat at the heating temperature above 523 K.

The aim of the invention is to increase the flame retardant properties of the polymer composition for coating by increasing the specific heat at the heating temperature above C and increase coke residue.

This objective is achieved in that the flame retardant polymer composition for coatings containing epoxygenase resin ED-20, ammonium polyphosphate, urea resin KF-W, amine hardener, the polyethylenepolyamine includes the additional products dehydropolycondensation phenanthrene containing chromium, with the following ratio of components, wt.%.

Epoxygenase resin ED-20 - 59,89-81,97

Ammonium polyphosphate - 4,098-23,95

Product dehydropolycondensation phenanthrene containing chromium - 0,82-4,19

Kardation leads to the conclusion, that the claimed composition flame-retardant resin composition for coating differs from the known to the introduction of a new component, namely the product of dehydropolycondensation phenanthrene containing chromium. Thus, the claimed technical solution meets the criterion of "novelty". Analysis of the known compositions flame retardant polymer compositions [2,3] showed that entered in the inventive solution, the substance is not known, for example the introduction of product dehydropolycondensation phenanthrene containing chromium. The introduction of advanced fire-retardant polymer composition for coating product dehydropolycondensation phenanthrene containing chromium, in combination with other components can improve the fire retardant properties due to the significant increase in specific heat at the heating temperatures above 523 K, the increase of the density of the coke residue.

Thus, this composition imparts flame retardant resin composition for coatings new properties, which allows to make a conclusion on the conformity of the proposed solutions to the criterion of "inventive step".

For experimental verification of the proposed structure were prepared 7 mixtures of ingredients, two of which show the e koksoobrazovaniya urea-formaldehyde resin KF-W, as a binder epoxygenase resin ED-20, to increase the density of coke used the product dehydropolycondensation phenanthrene containing chromium. Was utverjdali amine hardener - polyethylenepolyamine. The composition was obtained by simple mixing of the components. Coating and the samples were received in bulk.

To obtain product dehydropolycondensation phenanthrene containing chromium (uglerodvodorodsoderzhaschih tubular cylindrical shape), use the phenanthrene. As active media used molten chloride chromium.

Process duration - 2.5 hours, the temperature is 390 K. the Process is ended upon reaching the reaction mixture is resistant painting in black color and exposure within 3 hours

Then the reaction mass was washed with acids (hydrochloric and nitric) to remove salts, the residue was washed with water to pH 7 and was treated with such organic solvents as benzene and chlorobenzene to remove unreacted hydrocarbons and low molecular weight reaction products. To reduce the possibility of sticking of the particles obtained product was dispersible in alcohol or acetone using ultrasonic field generated by the piezoelectric element TSTS-19, size 0,67820 mm3octopii, electron microscopy and x-ray photoelectron spectroscopy and auger spectroscopy revealed that when dehydropolycondensation and promoting carbonization of phenanthrene in the presence of salts of chromium are formed of micro - and nanostructures of cylindrical shape (tubulin) containing carbon and chromium.

The use of tubulanus in combination with ammonium polyphosphate increases the effectiveness of intumescent coatings due to the fact that they stimulate the processes of coke formation and enhance the strength characteristics of foam coke.

In table.1,2 presents the formulation of the compositions and their properties.

From table.1,2 it follows that the polymer composition composition (PP. 5-6) has a high resistance to fire and heat sources that respectively provides a higher specific heat capacity up to 3.5-3.6 kJ/kg at a temperature of 573 K, the true density of the coke residue to 2.0-2,05 g/cm3the decrease Flammability. The use of the claimed invention will improve:

- fire resistant properties of coatings by increasing the specific heat, the true density of the coke residue;

- strength foam coke, formed under the influence of fire and heat East the percentage of the polymer composition for coating, including epoxygenase resin ED-20, ammonium polyphosphate, urea resin KF-W, - curable polyethylenepolyamine, characterized in that the composition additionally introduced product dehydropolycondensation phenanthrene containing chromium, in the following ratio, wt.%:

Epoxygenase resin ED-20 - 81,97 - 59,89

Ammonium polyphosphate - 4,098 - 23,95

Urea-formaldehyde resin KF-W - 0,82 - 2,99

Product dehydropolycondensation phenanthrene containing chromium - 0,82 - 4,19

The polyethylenepolyamine - 12,3 - 8,98

 

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