Agricultural polychloroethylene shed film composite dripless agent

A polyvinyl chloride, no-drip technology, applied in the field of plastic additives, can solve the problems of poor wetting effect, short non-drip duration, affecting the service life of polyvinyl chloride shed film, etc., so as to promote crop growth and improve Light transmittance, beneficial to photosynthesis

Inactive Publication Date: 2008-06-25
白山市喜丰塑业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing non-drip functional additives for agricultural polyvinyl chloride shed film are mainly surfactants such as polyethylene oxide and its derivatives, and polyol fatty acid esters. In actual use, the non-drip functional auxiliary The agent migrates from the interior of the film to the surface of the film, which can better wet and spread the condensed water droplets on the surface of the film, but for the non-drip functional additives containing polyethylene oxide and its derivatives After the PVC shed film is formulated, it will affect the service life of the PVC shed film; for non-drip functional additives mainly using polyol fatty acid esters, due to problems such as dosage, compounding technology or raw material selection, there may be no drip Problems of short shelf life and poor wetting effect

Method used

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  • Agricultural polychloroethylene shed film composite dripless agent
  • Agricultural polychloroethylene shed film composite dripless agent
  • Agricultural polychloroethylene shed film composite dripless agent

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1), preparation of sorbitan sesquiester stearate

[0032] Put 600kg of stearic acid, 400kg of sorbitol with a purity of 100% and 15kg of caustic soda into the reaction kettle. After the materials are melted, continue to heat and stir to carry out the esterification reaction. Keep the vacuum degree below -0.5MPa and the reaction temperature at 210-220℃ In the range of ℃, the reaction time is about 9 hours. Measure acid value 8mgKOH / g, add the sulfuric acid (concentration is 70%) of 20kg afterwards and be incubated 2 hours and generate sorbitan stearate sesquiester, its molecular structure is as follows:

[0033]

[0034] (2), preparation of sorbitan palmitate sesquiester

[0035] 550kg palmitic acid and 450kg purity are 100% sorbitol and 18kg caustic soda drop in reactor, continue to heat and stir after material melting and carry out esterification reaction, reaction process condition and sorbitan stearyl in above-mentioned (1) The reaction conditions for acid sesq...

Embodiment 2

[0044] (1), preparation of sorbitan sesquiester stearate

[0045] Put 620kg of stearic acid, 380kg of sorbitol with a purity of 100% and 34kg of caustic soda into the reaction kettle. After the materials are melted, continue to heat and stir to carry out the esterification reaction, keep the vacuum degree below -0.5MPa, and keep the reaction temperature in the range of 180-200°C Within, the reaction time is about 12 hours. Measure acid value 6mgKOH / g, added the phosphoric acid (concentration is 70%) of 32kg afterwards and incubated 2 hours, generate sorbitan stearate sesquiester, its molecular structure is as follows:

[0046]

[0047] (2), preparation of sorbitan palmitate sesquiester

[0048] 570kg palmitic acid and 430kg purity are 100% sorbitol and 30kg caustic soda and drop into reactor, continue to heat and stir after material melting and carry out esterification reaction, reaction technology and above-mentioned sorbitan stearate sesquiester The reaction conditions ...

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Abstract

The invention relates to a functional additive for an agricultural PVC shed film, in particular to a composite dripless agent for an agricultural PVC shed film. The composite dripless agent of the invention is prepared by compounding the nonionic surfactants and the anionic surfactants of the fatty acid polyol ester kind with different chain lengths proportionally. Due to the addition of the anionic surfactants, the invention enhances the wetting efficiency of the surfactants in combination and effectively enhances the initial effect of the dripless effects of the shed film, and drives the small water drops condensated on the PVC shed film surface to be changed into water films by spreading at a high speed with flowing down along the internal surface of the shed so as to enhance the transmittance of the shed film, increase the light intensity, deliver favorability for photosynthesis and the enhancement of the temperature in the shed, thus promoting the growth of the crops and reducing the occurrence of the diseases. The composite dripless agent of the invention has good thermal stability, can be conveniently processed and can adapt to the requirement for processing technique of the PVC shed film.

Description

technical field [0001] The invention relates to a plastic additive, in particular to a functional additive for agricultural polyvinyl chloride shed film—an agricultural polyvinyl chloride shed film composite non-drip agent. Background technique [0002] Plastic shed film has important properties such as light transmission and heat preservation, so it is widely used in agriculture. As a cover for winter greenhouse and early spring greenhouse vegetable production, it plays a very important role in solving the difficulty of eating fresh vegetables in winter and spring in northern my country. . With the development of my country's agricultural science and technology, users have higher and higher requirements for the functions of the shed film, not only requiring the shed film to be resistant to low temperature, anti-aging, and high strength, but also to have a good drip-free function. The early spring greenhouses or overwintering greenhouses that use ordinary polyvinyl chloride ...

Claims

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Application Information

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IPC IPC(8): C08K5/10C08L27/06C08J5/18
Inventor 祝年锋李海峰李炳君曲爱军
Owner 白山市喜丰塑业有限公司
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