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Polyolefin resin composition

A technology of polyolefin resin and composition, applied in the field of polyolefin resin composition, can solve the problems of poor dispersion, lack of thermal and light stability, and inability to obtain life, and achieve the effect of inhibiting the generation of gel

Inactive Publication Date: 2011-12-28
ADEKA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyolefins such as polyethylene have the following problems: lack of stability to heat and light, oxidation / deterioration tends to occur during high-temperature molding processing, and use stages exposed to heat and light, so that the life necessary for plastic products cannot be obtained
[0004] However, the method of blending a polyolefin resin and a stabilizer by melt kneading has a problem that it is necessary to add more than a necessary amount of the stabilizer in order to cope with poor dispersion of the stabilizer itself in the polyolefin resin.
[0007] Furthermore, Patent Document 3 discloses that tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyloxymethyl)methane as a general stabilizer for polyolefins Phenolic antioxidants with ester bonds, such as phenolic antioxidants, are not suitable for adding before polymerization because they reduce the catalytic activity of the polymerization catalyst.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] According to the following procedure ([1] Preparation of catalyst slurry, [2] Preparation of phenate solution, [3] Preparation of phosphite solution, [4] Polymerization of olefin-based monomer), a polyolefin-based resin was obtained combination.

[0062] [1] Preparation of catalyst slurry

[0063] 4.76 g (50 mmol) of anhydrous magnesium chloride, 25 mL of decane, and 23.4 mL (150 mmol) of 2-ethylhexanol were added, and the reaction was heated at 130° C. for 2 hours to prepare a homogeneous solution, and then 1.11 l of phthalic anhydride was added. g (7.5 mmol) was stirred for 1 hour while maintaining at 130°C to dissolve phthalic anhydride in this homogeneous solution. Next, the homogeneous solution was cooled to room temperature, and the entire amount was dropped into 200 mL (1.8 mol) of titanium tetrachloride maintained at -20°C over 1 hour. After the charging was completed, the temperature was raised to 110°C over 4 hours. After reaching 110°C, 2.68 mL (12.5 mmol)...

reference example 1

[0073] Polymerization was carried out in the same manner as in [4] of Example 1, except that 1.4 mL of the phenate solution and 0.7 mL of the phosphite solution were not used for the polymerization of the olefin-based monomer in the above-mentioned Example 1. Polyolefin resin composition. Next, tris(2,4-di-tert-butylphenyl)phosphite and tetrakis[methylene-3-(3,5-di-tert-butyl-4'-hydroxyphenyl)propionate]methane 500 ppm each was mixed with the obtained polyolefin-based resin, and pelletized by a single-screw extruder (device: PLASTOMILL, manufactured by Toyo Seiki Co., Ltd., extrusion temperature: 230° C., screw rotation speed: 50 rpm) to obtain pellets .

[0074] (Evaluation of stabilization effect)

[0075] With respect to the polyolefin-based resin composition or pellets obtained by the above method, the single-screw extruder (device: PLASTOMILL, manufactured by Toyo Seiki Co., Ltd., extrusion temperature: 280° C., screw rotation speed: 50 rpm) was repeated for 5 The seco...

Embodiment 2

[0084] According to the following procedure ([1] Preparation of catalyst slurry, [2] Preparation of phenate solution, [3] Preparation of phosphite solution, [4] Polymerization of ethylene), a polyethylene resin composition was obtained.

[0085] [1] Preparation of catalyst slurry

[0086] 31.2 g (273 mmol) of diethoxymagnesium, 41.2 g (136 mmol) of tributoxytitanium chloride, and 10.1 g of n-butanol were added to the nitrogen-substituted flask, and the reaction was carried out by heating at 150° C. for 6 hours to obtain a uniform solution. The solution was then cooled to room temperature, and 200 mL of n-heptane was added. Next, the temperature was raised to 40° C., 20.6 g (82.6 mmol) of ethyl aluminum sesquichloride was added dropwise, and the mixture was stirred for 1 hour and reacted.

[0087] After the completion of the reaction, the solid titanium catalyst component (Ziegler catalyst) was obtained by sufficiently washing with n-heptane until the free titanium compound co...

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Abstract

The present invention provides a polyolefin-based resin composition having a sufficient stabilizing effect and excellent cost performance. A polyolefin-based resin composition, which is a polyolefin-based resin composition containing a polyolefin-based resin prepared by using an organoaluminum compound before or during the polymerization of an olefin-based monomer. The phenolic antioxidant represented by the general formula (I) is obtained by masking and the phosphorus antioxidant is added to a catalyst system or a polymerization system to be polymerized. 0.001 to 0.5 parts by mass of phenolic antioxidant represented by general formula (I), and 0.001 to 3 parts by mass of phosphorus antioxidant. In formula (I), R represents an alkyl group having 1 to 30 carbon atoms or an alkenyl group having 2 to 30 carbon atoms which may have a branched chain and / or a cycloalkyl group, or an alkenyl group having 3 to 12 carbon atoms which may have a substituent. a cycloalkyl group, an aryl group having 6 to 18 carbon atoms which may have a substituent.

Description

technical field [0001] The present invention relates to a polyolefin-based resin composition, and in particular, the present invention relates to a substance obtained by masking a specific phenolic antioxidant with an organoaluminum compound before or during polymerization of an olefin-based monomer, and phosphorus The antioxidant is added to the catalyst system or the polymerization system and polymerized to realize a stabilized polyolefin-based resin composition. Background technique [0002] Polyolefins such as polyethylene have the following problems: they lack stability to heat and light, and are prone to oxidation / deterioration during high-temperature molding and use during exposure to heat and light, making it impossible to obtain the required life as a plastic product. . Therefore, oxidation / deterioration is usually prevented by adding stabilizers such as phenolic antioxidants, phosphorus-based antioxidants, sulfur-based antioxidants, hydroxylamine compounds, hinder...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/00C08F2/44C08F4/64C08J5/18C08K5/49
CPCC08F110/06C08K5/20C08F110/02C08J5/18C08K5/526C08F10/00C08J2323/02C08F2/44C08L23/02C08L23/00C08K5/5455C08K5/49
Inventor 绫部敬士冈本康平濑口哲哉川本尚史
Owner ADEKA CORP
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