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Poly-l-butylene resin composition and its usage

A technology of butene resin and composition, which is applied in the field of pipe joints and can solve the problems of poor performance, creep resistance and flexibility.

Inactive Publication Date: 2002-07-03
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can prevent the deformation of the tube and shorten the molding cycle, but the performance will be deteriorated, especially the creep resistance and flexibility will be deteriorated at high temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0070] Preparation of poly-1-butene resin composition

[0071] The poly-1-butene resin composition of the present invention can be produced, for example, by melt-kneading the poly-1-butene resin (A) and the polypropylene resin (B) at the above ratio.

[0072] Kneading can be carried out with a kneading device such as a single-screw extruder, twin-screw extruder, twin-screw kneader or internal mixer.

[0073] In the present invention, optional additives may be added to the poly-1-butene resin composition, such as nucleating agents, heat stabilizers, weather-resistant stabilizers, antistatic agents, fungicides, rust inhibitors, lubricants, Fillers and pigments may be used as long as they do not impair the purpose of the present invention.

[0074] Examples of nucleating agents include polyethylene wax, polypropylene wax, polyethylene, polystyrene, nylon (polyamide), polycaprolactone, talc, titanium dioxide, 1,8-naphthalimide, phthalimide, Formimide, alizarin, quinolizarin, 1,5...

preparation Embodiment 1

[0089] Preparation of solid titanium catalyst component (1)

[0090] Under the heating condition of 140° C., 6.0 kg (63 moles) of anhydrous magnesium chloride, 26.6 liters of decane and 29.2 liters (189 moles) of 2-ethylhexanol were reacted for 4 hours to prepare a uniform solution. After that, 1.59 kg (7.88 mol) of 2-ethylisopropyl-2-isobutyl-1,3-dimethoxypropane was added to the solution, which was stirred and mixed at 110° C. for 1 hour, A homogeneous solution was produced.

[0091] The prepared homogeneous solution was cooled to room temperature, and 37.0 kg of the homogeneous solution was added dropwise to 120 liters (1080 moles) of titanium tetrachloride kept at -24°C, and the process was continued for 2.5 hours. Then, the temperature of the resulting solution was raised during 6 hours, and when the temperature reached 110°C, 0.68 kg (3.37 mol) of 2-isopropyl-2-isobutyl-1,3-dimethoxypropane was added.

[0092] The resulting solution was stirred at 110°C for 2 hours to ...

preparation Embodiment 2

[0099] Preparation of solid titanium catalyst component (2)

[0100] Under the heating condition of 140°C, 4.28 kg (45 moles) of anhydrous magnesium chloride, 26.6 liters of decane and 21.1 liters (135 moles) of 2-ethylhexanol were reacted for 5 hours to prepare a uniform solution. After that, 1 kg (6.78 mol) of phthalic anhydride was added to the solution, which was stirred and mixed at 130°C for 1 hour to prepare a homogeneous solution.

[0101] The obtained homogeneous solution was cooled to room temperature, and then added dropwise to 120 liters (1080 moles) of titanium tetrachloride kept at -20°C, and the process was continued for 2 hours. The temperature of the resulting solution was raised during 4 hours, and when the temperature reached 110° C., 3.02 liters (11.3 moles) of diisobutylphthalate were added.

[0102] The resulting solution was stirred at 110°C for 2 hours to complete the reaction. After this time, solids were collected from the reaction mixture by hot fi...

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Abstract

Poly(1-butene) resin composition comprises 90-99.95 wt.% of a poly(1-butene) resin (A) which is obtained by copolymerizing 80-100 mol% of 1-butene with 0-20 mol% of a 2-10C α -olefin except 1-butene and has 0.01-50 g / 10 minutes MFR (190 deg.C) and 0.05-10 wt.% of a polypropylene resin (B) having 0.01-50 g / 10 minutes MFR (230 deg.C). This pipe and this joint for a pipe comprise the composition. According to this present invention a poly(1-butene) resin composition capable of preparing a pipe which shortens a curing time and reduces a molding cycle, namely has excellent productivity and excellent winding properties after extrusion molding, its pipe and a joint suitable for the pipe in which the pipe is suitable for a fluid transportation pipe such as a water supply pipe, a warm water supply pipe, etc., and the joint for a pipe is preferably useful as the joint for the pipe.

Description

technical field [0001] The present invention relates to poly-1-butene resin compositions and uses thereof, such as fluid (such as water) delivery pipes or hot water supply pipes, and pipe joints. Background technique [0002] Poly-1-butene resin not only has excellent creep resistance and stress crack resistance at high temperature, but also has excellent flexibility and processability, so it can be used for fluid conveying pipes such as water supply pipes or heat pipes. Water pipes and fittings like water supply pipes. [0003] However, there is a problem with poly-1-butene resin, that is, when poly-1-butene is melt-molded, the properties of molded products such as pipes and pipe joints made by it will change slowly, and it takes several days to ten days to cure Time, until then the product shows stable performance. [0004] In addition, when a tube obtained by extrusion molding of polybutene-1 resin is coiled, the tube is deformed or flattened. [0005] In order to shor...

Claims

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Application Information

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IPC IPC(8): F16L9/12B29C47/00B29K23/00B29L23/00C08L23/10C08L23/20C08L23/22
CPCC08L2205/025C08L23/10C08L23/20C08L2314/02C08L2205/02C08L2666/04C08L23/22
Inventor 得居伸
Owner MITSUI CHEM INC
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