Polyolefin-based resin composition for food/medical/water pipe applications
A technology for polyolefin resins and water pipes, which is applied in the field of polyolefin resin compositions, can solve the problems of complicated selection and management of polymerization conditions, reduced catalytic activity of polymerization catalysts, etc., and achieves excellent hygiene and the effect of inhibiting transfer.
Inactive Publication Date: 2011-12-28
ADEKA CORP
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Problems solved by technology
[0019] In this way, the method of adding a stabilizer before or during the polymerization of an olefin-based monomer has a stabilizer compounding process that can be omitted by melt kneading such as extrusion processing after polymerization, but there is a risk that the catalytic activity of the polymerization catalyst will be reduced, or There are problems such as coloration of polyolefin resin due to the interaction between the stabilizer and the catalyst metal, and the selection and management of polymerization conditions become complicated.
Method used
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Embodiment 1
[0075] A polyolefin-based resin composition was obtained according to the following procedures ([1] Preparation of catalyst slurry, [2] Preparation of stabilizer solution, [3] Polymerization of olefin-based monomer).
[0076] [1] Preparation of catalyst slurry
[0077] Add 4.76g (50mmol) of anhydrous magnesium chloride, 25mL of decane and 23.4mL (150mmol) of 2-ethylhexanol, conduct a heating reaction at 130°C for 2 hours to form a homogeneous solution, and then further add 1.11g (7.5mmol) of ortho Phthalic anhydride was maintained at 130° C. and stirred for 1 hour to dissolve phthalic anhydride in the homogeneous solution. Next, the homogeneous solution was cooled to room temperature, and the entire amount was added dropwise to 200 mL (1.8 mol) of titanium tetrachloride kept at -20° C. over 1 hour. After completion of the dropwise addition, the temperature was raised to 110° C. over 4 hours. After reaching 110° C., 2.68 mL (12.5 mmol) of diisobutyl phthalate was added, maint...
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The present invention provides a polyolefin-based resin composition for food, medical care, and water pipes, which is excellent in non-transferability and sanitation, and is stabilized. A polyolefin-based resin composition for food / medical / water pipe applications, which is a polyolefin-based resin composition for food / medical / water pipe applications containing polyolefin-based resins. It is obtained by adding a substance obtained by masking a phenolic antioxidant with an organoaluminum compound to a catalytic system or a polymerization system before or during the polymerization of the monomer, and the phenolic antioxidant is represented by the following general formula (I) As shown, 0.001 to 0.5 parts by mass of the phenolic antioxidant represented by the aforementioned general formula (I) is added with respect to 100 parts by mass of the aforementioned polyolefin-based monomer. (In the formula, R1 and R2 each independently represent a hydrogen atom or the like, and T represents an alkyl group having 1 to 30 carbon atoms which may have a branched chain and / or a cycloalkyl group, etc.).
Description
technical field [0001] The present invention relates to a polyolefin resin composition for food / medical / water pipe applications, in particular to a polyolefin resin composition for food / medical / water pipe applications to which a specific phenolic antioxidant has been added. Background technique [0002] Polyolefins lack stability to heat and light, and tend to oxidize / degrade easily during high-temperature molding processing or during use when exposed to heat and light, and cannot achieve the life required for plastic products. Therefore, in order to prevent oxidation / deterioration, stabilizers such as phenolic antioxidants, phosphorus antioxidants, sulfur antioxidants, hydroxylamine compounds, hindered amine compounds, ultraviolet absorbers, and acid scavengers are usually added, and are selected according to the application. The compounding of various stabilizers promotes the practical use of plastics. [0003] Polyolefins are widely used as films, sheets, and various mol...
Claims
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IPC IPC(8): C08L23/00C08F2/44C08F4/64C08K5/20
CPCC08K5/20C08L23/10C08L23/00C08K5/13C08K5/5455C08F2/44
Inventor 绫部敬士冈本康平濑口哲哉川本尚史
Owner ADEKA CORP