Efficient heat-resisting polyolefine composite light stabilizer, its production and use

A light stabilizer and production process technology, which is applied in the fields of fine chemicals and polymer materials, can solve the problems of light stabilization efficiency decline, reduce the activity of nitrogen and oxygen free radicals, etc., and achieve the effect of eliminating catalytic cracking and excellent light and heat stabilization effect

Active Publication Date: 2007-09-05
广东华南精细化工研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] To improve the resistance of light stabilizers to acidic substances, we should start with reducing the alkalinity (reactivity) of hindered amine light stabilizers to prevent acidic agricultural chemicals from reacting with hindered amines to form amine salts, reduce the activity of nitrogen oxide free radicals, and cause light stability. Efficiency drops

Method used

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  • Efficient heat-resisting polyolefine composite light stabilizer, its production and use
  • Efficient heat-resisting polyolefine composite light stabilizer, its production and use
  • Efficient heat-resisting polyolefine composite light stabilizer, its production and use

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The composite light stabilizer of the present invention should be selected and compounded according to different use areas and local climate conditions. The formula with the best effect is based on the compound use of different high molecular weight hindered amine light stabilizers. A sufficient amount of metal ion chelating components with appropriate functional structure. Because the anti-aging additives are greatly affected by climate factors, and other factors such as the resin matrix used and the use environment, agricultural planting methods, and the weather conditions of the year are more complicated, there are mainly region-based formulas and resin-based formulas Wait. For example, the following formula (the content of the components is calculated in weight percentage).

[0045] Polyolefin high-efficiency heat-resistant composite light stabilizer formula 1:

[0046] The polymer of succinic acid and 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol 40%;

[004...

Embodiment 2

[0066] Embodiment 2 (application in LDPE / LLDPE multifunctional shed film)

[0067] According to the formula in Table 3, the masterbatch of polyolefin high-efficiency heat-resistant composite light stabilizer was manufactured. The masterbatch manufacturing process is to first mix polyolefin high-efficiency heat-resistant composite light stabilizer and polyolefin resin in a high-speed mixer at a temperature of 70°C, and then add it to a twin-screw extruder with a length-to-diameter ratio of 40:1. The temperature was controlled at 200°C. The granulation method can choose air-cooled hot cutting or water-cooled strand granulation.

[0068] Then blow the PE multifunctional shed film according to the formula in Table 4. The main technical parameters of the film blowing unit are: the diameter of the extruder screw (screw of the corrugated belt mixing head) is 90mm, and the length-diameter ratio (L / D)=30:1. The diameter of the die is 500mm, and the die gap is 1.8mm. The main techni...

Embodiment 3

[0076] Example 3 (application in mLLDPE shed film)

[0077] The thin mLLDPE shed film was blown with the blended resin of mLLDPE (350D60) and LDPE (18D), and the composite light stabilizer / composite antioxidant aging resistance system was used for the test. Pre-made anti-aging masterbatch, and then mix the resin and masterbatch evenly, use a film blowing unit to blow a shed film with a folded diameter of 4000mm and a thickness of 0.06mm (number 2104) according to the technical conditions in Table 9, and its initial mechanical properties are tested. The results are listed in Table 8.

[0078] shed film

[0079] Film blowing unit model

[0080] The number 2104mLLDPE greenhouse film was covered on the solar greenhouse and the arched steel pipe frame greenhouse for application test. Covering the greenhouse for 6, 10, 15, and 21 months, samples were taken to test the mechanical properties and optical properties of the greenhouse film. The results are listed i...

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Abstract

An efficient composite heat-resisting polyolefine light stabilizer, its production and use are disclosed. The light stabilizer consists of two or above polymerized hindered amine light stabilizer mixed components 60-95wt% and metal-ion chelate component 5-40wt%, which has hindered phenol anti-oxidant structure and bis-amide metal ion chelating structure and / or oxalamide semi-hindered amine structure. It has excellent heat and ageing resistances and can be used for PE and EVA agricultural long-life thin film or functional greenhouse thin film.

Description

technical field [0001] The invention relates to the fields of fine chemicals and polymer materials, in particular to a composite light stabilizer. Background technique [0002] The aging of polymer materials can be caused by many reasons, such as heat, ultraviolet light, mechanical stress, high-energy radiation, electric field, etc., which can be a single factor or a combination of factors. As a result, the molecular structure of the polymer material is changed and the relative molecular weight is reduced or cross-linking occurs, so that the material properties are deteriorated and cannot be used. The most common ageing factors are heat and ultraviolet light, because the most exposed environment for plastics from production, storage, processing to product use is heat and sunlight (ultraviolet light). [0003] Sunlight includes ultraviolet, visible and infrared light. Although ultraviolet light only accounts for 6% of the energy of sunlight reaching the earth's surface, sho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/3435C08L23/00B29C47/00B29C47/92B29B9/12B29C48/92
CPCB29C47/92
Inventor 陈宇王朝晖
Owner 广东华南精细化工研究院有限公司
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