RU2127511C1 - Film polymer material composition for coating hot-houses and optic activator for polymer material (versions) - Google Patents

Abstract

FIELD: polymer materials. SUBSTANCE: hot-house coats contain thermoplastic polymer, stabilizer (namely, phenosan-23), and europium-based optical activator, which is europium-activated strontium sulfide or strontium sulfide activated with europium, dysprosium and/or terbium, or strontium and calcium sulfides activated with europium, dysprosium and/or terbium. Film material manufactured using optical activators proposed possesses light-transformation properties: absorbs sun-light UV emission in 250- 330 and 400-440 nm regions and emits in red (580-760 nm) spectrum region. Emission maximum lies within 618-680 nm band, that is both in chlorophyll A and chlorophyll B absorption region, which enhances plant photosynthesis activity. In addition, polymer material possesses durable (up to 2 hr) afterglow, which provides irradiation of plants in spectrum region most favorable for them and after sunset. Excitement spectrum of polymer material with optical filler covers near visible sun-spectrum region, which enables the film to be effectively used in cloudy time. EFFECT: improved optical characteristics of polymer film. 13 cl, 30 ex

Description

 The invention is intended for use in agriculture, in particular in greenhouses.

Polymer compositions using optical activators when applied in agriculture and in crop production provide a number of factors that favorably affect the stimulation of plant growth, increase seed germination, increase yield and reduce ripening time, namely:
- protection of plants from the most harmful part of UV radiation;
- redistribution of the spectrum of natural solar radiation in the region of maximum absorption of chlorophyll;
- increase in the duration of irradiation of plants in the most favorable spectral region for them.

 The widespread involvement of solar energy in the energy balance of agricultural production is an extremely urgent problem. An important role in its solution is played by the creation of light-regulating and light-transforming materials. The creation of such materials provides fine control of the spectral composition of the light incident on the green leaf of the plant, and leads to increased activity of plant photosynthesis.

 At the same time, a positive agrophysical effect is achieved not so much by improving the energy balance in the red region as by impacting additional radiation with a narrow spectrum in the region of maximum absorption of chlorophyll A and chlorophyll B (610-680 nm).

 A known composition for producing films based on a thermoplastic polymer containing an optically active filler (activator), the composition of which contains complex compounds of europium tenoyl trifluoroacetonate with 1,10-phenanthroline (a.s. SU 1381128, class C 08 K 5/07 15.03 .88).

 The introduction of this compound into the film allows you to absorb hard UV radiation in the region of 250-380 nm and convert it into radiation in the region of 580-760 nm. However, the use of this composition in mass production is very expensive, the compound itself is toxic.

 The closest in composition is a polymer composition based on suspension polyvinyl chloride, which is used in the manufacture of agricultural films.

 As an optically active additive, the composition contains europium complex compounds with 1.10 phenanthroline or triphenylphosphinooxide, or mixtures thereof. The composition also contains a stabilizer - co-precipitated barium and cadmium stearate and plasticizers (a.s. SU 1552616 A1, class C 08 L 27/06, 05.20.96).

 A disadvantage of the known composition is the presence in it of expensive, deficient additives, which are toxic compounds.

 Active additives for a greenhouse plastic film are known, which are a mixture of complex compounds of europium tenoyl trifluoroacetonate with 1,10-phenanthroline and europium benzoyl benzoate with 4.4-dipyridyl (SU 1463737, class C 08 L 23/06, 1989).

 The known mixture allows you to absorb radiation in the region of 220-380 nm and effectively (75-79%) transform it into the region of 580-760 nm. The compounds used in the additive are scarce, toxic, which makes it impossible to mass-produce such additives and ensure the safety of work in the manufacture of films and waste disposal.

 Given the technical nature and purpose, an optical activator for a greenhouse polyethylene film containing a phosphor from yttrium oxide activated by europium, as well as calcium halophosphate activated by antimony and manganese, and magnesium fluorogermanate activated by manganese was selected as a prototype.

 The use of such a mixture in a greenhouse film is insufficiently effective due to the fact that its emission spectrum only partially falls into the region of maximum absorption of chlorophyll. In addition, its excitation in the near UV region is weak, which does not give a noticeable effect on cloudy and cloudy days. The prototype filler also does not provide afterglow (RU 2013437 C1, C 09 K 11/08, 05/30/94).

The objective of the invention is to provide a comprehensive technical result, namely:
- absorption of UV radiation, which inhibits the growth of plants, and its conversion into radiation in the red region of the spectrum;
- the use of a polymer film with the described activator in cloudy weather, since the excitation spectrum of the composition captures the near region of the visible part of the spectrum.

- enhanced photosynthesis of plants due to the targeted effect of additional radiation with a narrow spectrum in the region of maximum absorption of chlorophyll A and chlorophyll B;
- a long afterglow for several hours, which ensures irradiation of plants in the spectral region most favorable to them and after sunset, as if artificially increasing the duration of daylight hours.

The specified technical result is achieved in that the proposed composition containing a thermoplastic polymer, a stabilizer and an optical activator based on europium compounds, contains phenosan-23 as a stabilizer, and strontium sulfide activated by europium, or strontium and calcium sulfide activated as an optical activator europium, or strontium sulfide activated by europium and dysprosium and / or terbium, or strontium and calcium sulfides activated by europium and dysprosium and / or terbium in the following Ocean Component wt.%:
Stabilizer - 0.05-0.10
Activator - 0.01-0.50
Polymer - Else
In addition, the optical activator for the film material as europium compounds contains strontium sulfide activated by europium, in the following ratio, wt.%:
Strontium sulfide - 99.50-99.95
Europium - 0.05-0.50
or strontium sulfide and calcium sulfide activated by europium, in the following ratio of components wt.%:
Strontium sulfide - 5.00-94.10
Calcium Sulphide - 5.45-94.9
Europium - Rest
or strontium sulfide activated by europium and dysprosium and / or terbium, in the following ratio of components, wt.%:
Strontium sulfide - 99.50-99.94
Dysprosium and / or terbium - 0.01-0.04
Europium - Rest
or strontium sulfide and calcium sulfide activated by europium and dysprosium and / or terbium in the following ratio of components, wt.%:
Strontium sulfide - 5.00-94.49
Calcium Sulphide - 5.45-94.46
Dysprosium and / or terbium - 0.01-0.04
Europium - Rest
In addition, the optical activator for the film polymer material may additionally contain yttrium phosphate-vanadate activated by europium, in the following ratio, wt.%:
One of these optical activators is 10-50
Europium Activated Yttrium Vanadate Phosphate - 10-90
or yttrium oxysulfide activated by europium in the following ratio of components, wt.%:
One of these optical activators is 10-50
Europium Activated Yttrium Oxysulfide - 30-90
Due to the introduction of calcium sulfide into the activator, it is possible to shift the maximum of its radiation and ensure the most complete penetration into the region of maximum absorption of chlorophyll.

 The compositions provide an afterglow of the optical activator for 0.5 to 1 hour.

 However, the addition of dysprosium and / or terbium to the composition of the optical activator in an amount of 0.01-0.04 wt.% Allows you to increase the afterglow to 1.5-2 hours, and the addition of yttrium phosphate-vanadate activated by europium or yttrium oxysulfide, activated by europium, it allows to increase the absorption of the UV part of the solar spectrum in the range 220-350 nm, the most harmful for plants, and to increase luminescence in the red region of the spectrum.

 To give the optical activator the ability to be wetted by the molten polymer, as well as to increase their resistance to moisture, they are coated with a coating by known methods. As a thermoplastic translucent polymer, polyethylene, polymethyl methacrylate, polycarbonate, polystyrene, etc. are used.

 The quantitative content of the optical activator of the proposed composition of 0.01-0.5% by weight of the composition.

 When the content of the optical activator is less than 0.01 wt.%, The luminescence intensity of the film light-transforming material is reduced. When the content of the optical activator is more than 0.5%, the luminescence intensity increases slightly, but the cost of light-transforming material increases.

 To increase the service life of light-transforming polymeric materials, phenosan-23 (TU 6-22-0205603-3-88) in the amount of 0.05-0.1 wt.% Is used as a stabilizer. In addition, the addition of phenosan-23 increases the luminescence intensity of the polymer light-transforming material.

 The proposed polymer light-transforming materials absorb up to 90% of UV radiation in the range of 220-350 nm and 400-440 nm, the transparency in the range of 580-700 nm is 80-85%.

 The estimated warranty period for maintaining the luminescent properties of light-converting materials exceeds the service life of the polymer film material and is at least 10 years.

 The invention consists in the following. To obtain a composition, polyethylene granules are mechanically mixed with a powdered optical activator and stabilizer (phenosan-23) and subjected to extrusion processing to obtain a polymer film with a thickness of, for example, 120 μm.

 The invention is illustrated by examples, confirming the possibility of its implementation with the achievement of the necessary technical result.

Example 1. 100 g of strontium oxide and 45 g of sulfur are mixed with a solution of europium nitrate in an amount of 0.1 wt.% In terms of metal, stirred, dried and calcined at a temperature above 900 ^o C in quartz cuvettes. After cooling, the product is discarded and sieved.

The resulting optical activator contains 99.9 wt.% Strontium sulfide, 0.1 wt. % europium, emits in the red region λ _max = 618 nm, afterglow duration of 1 h

 Example 2. Carried out analogously to example 1, except that europium is administered in an amount of 0.05 wt.%.

The resulting optical activator contains 99.95 wt.% Strontium sulfide, 0.05 wt.% Europium, emits in the red region with λ _max = 618 nm, afterglow duration of 30 minutes

 Example 3. Carried out analogously to example 1, except that europium is administered in an amount of 0.5 wt.%.

The resulting optical activator contains 99.5 wt.% Strontium sulfide, 0.5 wt.% Europium, emits in the red region λ _max = 618 nm, afterglow duration 45 minutes

 When the europium content is less than 0.05 wt.% Or more than 0.5 wt.%, The resulting product has a low brightness and a short (less than 5 min) afterglow.

Example 4. 50 g of strontium oxide, 50 g of calcium oxide and 40 g of sulfur are mixed with a solution of europium nitrate in an amount of 0.1 wt.% In terms of metal, stirred, dried and calcined at temperatures above 900 ^o C in quartz cuvettes. After cooling, the product is discarded and sieved.

 The resulting optical activator contains 99.9 wt.% Solid solution of strontium sulfide and calcium sulfide and 0.1 wt.% Europium. Moreover, in the solid solution contains 47.5 wt.% Strontium sulfide and 52.4 wt.% Calcium sulfide.

The optical activator emits in the red region of the spectrum with λ _max = 660 nm, the afterglow duration is 50 minutes.

 Example 5. 4.23 g of strontium oxide, 73.6 g of calcium oxide and 45 g of sulfur are mixed with a solution of europium nitrate in an amount of 0.5 wt.% In terms of metal. Then proceed analogously to example 4. The resulting optical activator contains 99.5 wt.% Solid solution of strontium sulfide and calcium sulfide and 0.5 wt.% Europium. Moreover, in the solid solution contains 5 wt.% Strontium sulfide and 94.5 wt.% Calcium sulfide.

The optical activator emits in the red region of the spectrum with λ _max = 690 nm, the afterglow duration is 40 minutes.

 Example 6 4.23 g of strontium oxide, 74.0 g of calcium oxide and 45 g of sulfur are mixed with a solution of europium nitrate in an amount of 0.1 wt.% In terms of metal. Then proceed analogously to example 4. The resulting optical activator contains 99.9 wt.% Solid solution of strontium sulfide and calcium sulfide and 0.1 wt.% Europium. Moreover, in the solid solution contains 5 wt.% Strontium sulfide and 94.5 wt.% Calcium sulfide.

The optical activator emits in the red region of the spectrum with λ _max = 695 nm, the afterglow duration of 35 minutes

Example 7. 81.8 g of strontium oxide, 4.56 g of calcium oxide, 40 g of sulfur are mixed with a solution of europium nitrate in an amount of 0.05 wt.% In terms of metal. Then proceed analogously to example 4. The resulting optical activator contains 99.95 wt.% Solid solution of strontium sulfide and calcium sulfide and 0.05 wt.% Europium. Moreover, in the solid solution contains 94.1 wt. % strontium sulfide and 5.85 wt.% calcium sulfide. The optical activator emits in the red region of the spectrum with λ _max = 625 nm and has an afterglow duration of 45 minutes.

 Example 8. 81.8 g of strontium oxide, 4.25 g of calcium oxide and 40 g of sulfur are mixed with a solution of europium nitrate in an amount of 0.45 wt.% In terms of metal. Then proceed analogously to example 4. The resulting optical activator contains 99.55 wt.% Solid solution of strontium sulfide and calcium sulfide and 0.45 wt.% Europium. Moreover, in the solid solution contains 94.1 wt.% Strontium sulfide and 5.45 wt.% Calcium sulfide.

The optical activator emits in the red region of the spectrum with λ _max = 620 nm and has a afterglow of 55 minutes.

 With an increase in the calcium sulfide content of more than 94.9 wt.%, The position of the radiation maximum shifts to the long-wavelength region so that the bulk of the radiation goes beyond the region of maximum absorption of chlorophyll. With a decrease in the concentration of calcium sulfide less than 5.45 wt.%, We obtain a similar effect due to the shift of radiation to the short-wavelength region. When the europium content is less than 0.05 wt.% And more than 0.5 wt.%, The product has a low luminance and a short afterglow.

 Example 9. Carried out analogously to example 1, except that in addition to europium nitrate in an amount of 0.1 wt.% In terms of metal, add 0.03 wt.% Dysprosium nitrate in terms of metal.

The resulting optical activator contains 99.87 wt.% Strontium sulfide, 0.1 wt.% Europium and 0.03 wt.% Dysprosium, emits in the red region with λ _max = 618 nm, has an afterglow of 2 hours.

 Example 10. Carried out analogously to example 1, except that in addition to europium nitrate in an amount of 0.06 wt.% In terms of metal add 0.04 wt.% Terbium nitrate in terms of metal.

The resulting optical activator contains 99.9 wt.% Strontium sulfide, 0.06 wt.% Europium and 0.04 wt.% Terbium, emits in the red region of the spectrum with λ _max = 618 nm, has an afterglow of 90 minutes.

 Example 11. Carried out analogously to example 1, except that in addition to europium nitrate in the amount of 0.45 wt.% In terms of metal add 0.005 wt.% Dysprosium of nitrate and 0.005 wt.% Terbium nitrate, both in terms of metal.

The resulting optical activator contains 99.53 wt.% Strontium sulfide, 0.46 wt. % europium and 0.005 wt.% terbium and dysprosium, emits in the red spectral region with λ _max = 618 nm, has an afterglow of 80 minutes.

 Example 12. Carried out analogously to example 1, except that in addition to europium nitrate in the amount of 0.46 wt.% In terms of metal add 0.04 wt.% Terbium nitrate in terms of metal.

The resulting optical activator contains 99.5 wt.% Strontium sulfide, 0.46 wt.% Europium, 0.04 wt.% Terbium, emits in the red region of the spectrum with λ _max = 618 nm. It has a afterglow of 70 minutes.

 Example 13. Carried out analogously to example 1, except that in addition to europium nitrate in an amount of 0.05 wt.% In terms of metal, add 0.01 wt.% Dysprosium nitrate in terms of metal.

The resulting optical activator contains 99.94 wt.% Strontium sulfide, 0.05 wt. % europium and 0.01 wt. % dysprosium, emits in the red region of the spectrum with λ _max = 618 nm and has a afterglow duration of 65 minutes

 When the europium content is less than 0.05 wt.% And more than 0.46 wt.%, The resulting product has a low brightness and a short afterglow. With a decrease in the dysprosium or terbium content in the activator of less than 0.01 wt.%, An increase in afterglow duration is not observed, and with an increase in their content of more than 0.04 wt.%, There is also no increase in afterglow duration.

 Example 14. 41.1 g of strontium oxide, 50 g of calcium oxide and 40 g of sulfur are mixed with a solution of europium nitrate in an amount of 0.1 wt.% In terms of metal, add 0.03 wt.% Terbium nitrate in terms of metal, then proceed analogously to example 4.

The resulting optical activator contains 47.47 wt.% Strontium sulfide, 52.40 wt. % calcium sulfide, 0.1 wt.% europium and 0.03 wt.% terbium, emits in the red spectral region with λ _max = 660 nm and has an afterglow of 90 minutes.

 Example 15. 81.4 g of strontium oxide, 4.25 g of calcium oxide and 40 g of sulfur are mixed with a solution of europium nitrate in an amount of 0.05 wt.% In terms of metal, add 0.04 wt.% Dysprosium of nitrate in terms of metal, then proceed analogously to example 4.

The resulting optical activator contains 94.46 wt.% Strontium sulfide, 5.45 wt.% Calcium sulfide, 0.05 wt.% Europium and 0.04 wt.% Dysprosium, emits in the red spectral region with λ _max = 625 nm and has a afterglow of 60 minutes.

 Example 16. 4.23 strontium oxide, 73.5 g of calcium oxide and 45 g of sulfur are mixed with a solution of europium nitrate in an amount of 0.5 wt.% In terms of metal, add 0.02 wt.% Dysprosium nitrate, 0.02 wt.% terbium nitrate, both in terms of metal, then proceed analogously to example 4.

The resulting optical activator contains 5.0 wt.% Strontium sulfide, 94.46 wt.% Calcium sulfide, 0.5 wt.% Europium, 0.02 wt.% Dysprosium, 0.02 wt. % terbium, emits in the red region of the spectrum with λ _max = 690 nm and has a afterglow of 45 minutes.

 Example 17. 81.5 g of strontium oxide, 4.25 g of calcium oxide and 40 g of sulfur are mixed with 0.05 wt.% Europium nitrate in terms of metal, add 0.01 wt.% Terbium nitrate in terms of metal, then proceed analogously to example 4.

The resulting optical activator contains 94.49 wt.% Strontium sulfide 5.45 wt.% Calcium sulfide, 0.05 wt.% Europium, 0.01 wt.% Terbium, emits in the red region with λ _max = 625 nm and has a duration afterglow 50 min.

 An increase in calcium content of more than 94.46 wt.% Shifts the maximum of radiation to the long-wavelength region, a decrease of less than 5.45 wt.% Shifts the maximum of radiation to the short-wavelength region, as a result of which the bulk of the radiation goes beyond the maximum absorption of chlorophyll. A decrease in europium content of less than 0.05 wt.% And an increase of more than 0.5 wt.% Leads to a decrease in brightness; a decrease in the content of terbium and / or dysprosium of less than 0.01 wt.% does not lead to an increase in the duration of the afterglow, and their increase in more than 0.04 wt.% not in the duration of the afterglow, and their increase in more than 0.04 wt.% also leads to an increase in the duration afterglow.

 Example 18. An optical activator for a polymeric material contains 29.27 wt. % strontium sulfide, 0.3 wt.% europium and 70 wt.% yttrium oxysulfide activated by europium (europium content in activated yttrium oxysulfide in accordance with TU 48-4-328-87).

The optical activator absorbs UV radiation from the solar spectrum in the range 220-360 nm and radiation in the 400-440 nm region, emits in the red region of the spectrum with λ _max = 618 nm, afterglow duration of 60 minutes

Example 19. An optical activator for a polymeric material contains 11.77 wt. % strontium sulfide, 13.11 wt.% calcium sulfide, 0.12 wt.% europium and 75 wt.% yttrium oxysulfide activated by europium. The optical activator absorbs UV radiation in the region of 220-360 nm and in the region of 400-440, emits in the red region of the spectrum with λ _max = 618 nm, afterglow duration of 55 minutes

 Example 20. The optical activator for the polymeric material contains 39.95 wt.% Strontium sulfide, 0.04 wt.% Europium and 0.01 wt.% Dysprosium and 60 wt. % yttrium oxysulfide activated by europium.

The optical filler absorbs the radiation of the solar spectrum in the range 220-350 and 400-440 nm, emits in the red region with λ _max = 618 nm. Afterglow 90 min.

 Example 21. The optical activator contains 23.28 wt.% Strontium sulfide, 26.4 wt.% Calcium sulfide, 0.3 wt.% Europium, 0.02 wt.% Terbium and 50 wt.% Yttrium oxysulfide activated by europium.

The optical activator absorbs the radiation of the solar spectrum in the range 220-350 nm and 400-440 nm, emits in the red region of the spectrum with λ _max = 618 and 690 nm. Afterglow 90 min.

 Example 22. The optical activator contains 9.99 wt.% Strontium sulfide, 0.01 wt.% Europium and 90 wt.% Yttrium phosphate vanadate activated with europium (europium content in activated yttrium phosphate vanadate in accordance with TU 48-4 -403-87).

The optical activator absorbs the radiation of the solar spectrum in the range 220-350 and 400-440 nm and emits in the red region of the spectrum with λ _max = 618 nm.

 Afterglow duration 60 min.

 Example 23. The optical activator contains 11.775 wt.% Strontium sulfide, 13.20 wt.% Calcium sulfide, 0.025 wt.% Europium and 75 wt.% Yttrium phosphate-vanadate activated by europium.

The optical activator absorbs the radiation of the solar spectrum in the range 220-350 and 400-440 nm, emits in the red region of the spectrum with λ _max = 618 and 650 nm. Afterglow duration 50 min.

 Example 24. An optical activator for a polymeric material contains 49.93 wt. % strontium sulfide, 0.055 wt.% europium and 0.015 wt.% dysprosium, and 50 wt.% yttrium phosphate vanadate activated by europium.

The optical activator absorbs radiation from the solar spectrum in the range 220-350 nm and 400-440 nm and emits in the red region of the spectrum with λ _max 618 nm, afterglow duration 2 hours

 Example 25. The optical activator contains 33.07 wt.% Strontium sulfide, 1.90 wt. % calcium sulfide, 0.016 wt.% europium, 0.007 wt.% dysprosium and 0.007 wt.% terbium and 65 wt.% yttrium phosphate-vanadate activated by europium.

The optical activator absorbs radiation in the range 220-350 nm and 400-440 nm and emits in the red region with λ _max = 618 and 690 nm.

 Afterglow duration 45 min.

 The blended optical activator may also contain yttrium oxide activated by europium. Europium content in activated yttrium oxide in accordance with TU 48-4-444-83.

 Example 26. The optical activator contains 23.74 wt.% Strontium sulfide, 26.20 wt. % calcium sulfide, 0.05 wt.% europium and 0.01 wt.% terbium and 50% yttrium oxide activated by europium.

The optical activator absorbs radiation in the range of 220-350 nm and 400-440 nm and emits in the red region with λ _max = 618 and 660 nm. Afterglow duration 90 min.

Example 27. The composition of the polymer film coating based on polyethylene brand 108-03-020, includes an optical activator containing 99.9 wt. % strontium sulfide, 0.1 wt.% europium, thermostabilizer - phenosan-23 in the ratio, wt.%:
Optical Activator - 0.1
Thermostabilizer - 0.05
Polyethylene - Else
The composition is obtained by mechanical mixing of polyethylene granules with a powdered activator and heat stabilizer, followed by extrusion processing into a film product with a thickness of 120 μm. The resulting film material absorbs the radiation of the solar spectrum in the range 250-350 nm by 65%, in the range 400-440 nm - 90% emits in the red region of the spectrum with λ _max = 618 nm. Afterglow 1 h.

Example 28. The composition of the polymer film coating based on polyethylene brand 158-03-020 includes an activator containing 99.5 wt.% Strontium sulfide, 0.46% wt. Europium, 0.04 wt.% Terbium, thermostabilizer - phenosan- 23 in the ratio, wt.%:
Activator - 0.2
Thermostabilizer - 0.06
Polyethylene - Else
The composition is obtained analogously to example 26. The obtained film material absorbs the radiation of the solar spectrum in the range 250-330 nm by 69%, in the range 400-440 nm by 92%, emits in the red region of the spectrum with λ _max = 618 nm, afterglow duration - 70 min

Example 29. A composition based on polyethylene brand 108-03-020, containing as an activator strontium sulfide activated by europium, containing 99.9 wt.% Strontium sulfide and 0.1 wt.% Europium, and yttrium oxysulfide activated by europium, thermostabilizer - phenosan-23 in the ratio, wt.%:
Europium Activated Strontium Sulphide - 0.1
Europium Activated Yttrium Oxysulfide - 0.3
Thermostabilizer - 0.5
Polyethylene - Else
get analogously to example 18. The obtained film material absorbs the radiation of the solar spectrum in the range 280-300 nm by 91%, in the range 400-440 nm by 92%, emits in the red region of the spectrum with λ _max = 618 nm, the afterglow duration is 1 hour

Example 30. A composition based on polyethylene brand 108-03-020, containing as an activator strontium sulfide activated by europium and terbium, containing 99.5 wt. % strontium sulfide, 0.46 wt.% europium and 0.04 wt.% terbium, and yttrium phosphate-vanadate activated by europium, thermostabilizer - phenosan-23 in the ratio, wt.%:
Strontium sulfide activated by europium and terbium - 0.03
Europium Activated Yttrium Phosphate Vanadate - 0.04
Thermostabilizer-phenosan 23 - 0.08
Polyethylene - Else
get analogously to example 18. The obtained film material absorbs the radiation of the solar spectrum in the range of 250-330 nm by 90%, in the range of 400-440 nm by 85%, emits in the red region of the spectrum with λ _max = 618 and 630 nm, afterglow duration 70 min

 The claimed invention can be used in agricultural production in the manufacture of polymer compositions containing an activator and a heat stabilizer.

 The invention provides unique opportunities for such compositions to redistribute the energy of the spectrum of natural solar radiation, increase their stability, service life, and improve the environmental situation when working with them. In cloudy weather, it regulates the maximum radiation in the region of the maximum absorption of chlorophyll and increases the afterglow, thereby creating the possibility of varying the properties of polymer compositions in relation to the growing conditions of plants to achieve the maximum agrotechnical effect.

Claims (8)

1. The composition of the film polymer material for coating greenhouses, containing a thermoplastic polymer, a stabilizer and an optical activator based on europium compounds, characterized in that it contains phenosan-23 as a stabilizer, and europium activated strontium sulfide or strontium sulfides as an activator and calcium activated by europium, or strontium sulfide activated by europium, dysprosium and / or terbium, or strontium, calcium sulfides activated by europium, dysprosium and / or terbium in the following relation oshenie components, wt.%:
Stabilizer - 0.05 - 0.1
Optical Activator - 0.01 - 0.5
Polymer - Else
2. An optical activator for a polymeric material based on a europium compound, characterized in that it contains europium activated strontium sulfide as europium compounds in the following ratio of components, wt.%:
Strontium sulfide - 99.5 - 99.95
Europium
0.05 - 0.5
3. The activator according to claim 2, characterized in that it further comprises yttrium phosphate vanadate activated by europium in the ratio (1-5): (1-9).  4. The activator according to claim 2, characterized in that it further comprises yttrium oxysulfide activated by europium in the ratio (1-5): (3-9). 5. Optical activator for a polymer material based on europium compounds, characterized in that it contains strontium sulfide and calcium sulfide activated by europium as a europium compound, in the following ratio, wt.%:
Strontium sulfide - 5.00 - 94.1
Calcium Sulphite - 5.45 - 94.9
Europium - Rest
6. The activator according to claim 5, characterized in that it additionally contains yttrium phosphate vanadate activated by europium in the ratio (1-5): (1-9).  7. The activator according to claim 5, characterized in that it additionally contains yttrium oxysulfide activated by europium in the ratio (1-5): (3-9). 8. An optical activator for a polymeric material based on europium compounds, characterized in that as europium compounds it contains strontium sulfide activated by europium, dysprosium and / or terbium, in the following ratio, wt.%:
Strontium sulfide - 99.5 - 99.4
Dysprosium and / or terbium - 0.01 - 0.04
Europium - Rest
9. The activator according to claim 8, characterized in that it additionally contains yttrium phosphate vanadate activated by europium in the ratio (1-5): (1-9).  10. The activator according to claim 8, characterized in that it further comprises yttrium oxysulfide activated by europium in the ratio (1-5): (3-9). 11. An optical activator for a polymer material based on europium compounds, characterized in that it contains strontium sulfide and calcium sulfide activated by europium, dysprosium and / or terbium as europium compounds, in the following ratio, wt.%:
Strontium sulfide - 5.0 - 94.49
Calcium Sulphide - 5.45 - 94.46
Dysprosium and / or terbium - 0.01 - 0.04
Europium - Rest
12. The activator according to claim 11, characterized in that it further comprises yttrium phosphate vanadate activated by europium in the ratio (1-5): (1-9).  13. The activator according to claim 11, characterized in that it further comprises yttrium oxysulfide activated by europium in the ratio (1-5): (3-9).