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Molded article and method for manufacturing same

A manufacturing method, technology of molded body, applied in the direction of coating, etc., can solve the undisclosed problems, and achieve the effect of excellent bonding strength, damage resistance and coloring resistance

Active Publication Date: 2019-10-11
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] On the other hand, Patent Document 1 does not disclose that all these compositions contain a combination of two or more polymethylpentenes having different melting points.

Method used

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  • Molded article and method for manufacturing same
  • Molded article and method for manufacturing same
  • Molded article and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0130] Hereinafter, although an Example demonstrates this invention more concretely, this invention is not limited to the following Example unless the summary is exceeded.

[0131] [Measuring methods of various physical properties]

[0132] The methods used for measuring various physical properties of the polymers obtained in this example are shown below.

[0133] (1) Composition

[0134] By adopting the above 13 The C-NMR measurement method determines the composition of the polymer.

[0135] (2) Intrinsic viscosity [η]

[0136] The intrinsic viscosity [η] measured at 135° C. in a decahydronaphthalene solvent was determined by the method described above using an Ubbelohde viscometer.

[0137] (3) Weight average molecular weight (Mw) and molecular weight distribution (Mw / Mn)

[0138] Liquid chromatography: ALC / GPC 150-C plus type (differential refractometer detector integrated type) manufactured by Waters was used, and GMH6-HT × 2 and GMH6-HTL × 2 manufactured by Tosoh Co....

Synthetic example 1

[0151] ~Synthesis of Polymer B-1~

[0152] Into a 1.5 L capacity SUS autoclave with stirring blades fully replaced with nitrogen, 300 ml of n-hexane (dried product dried on activated alumina under a dry nitrogen atmosphere) was charged at 23°C. After mixing with 450 ml of 4-methyl-1-pentene, 0.75 ml of a 1.0 mmol / ml toluene solution of triisobutylaluminum (TIBAL) was charged, and stirring was started.

[0153] Next, the autoclave was heated until the inner temperature became 60° C., and pressurized with propylene so that the total pressure (gauge pressure) became 0.19 MPa.

[0154] Next, a pre-prepared mixture containing 1 mmol of methylaluminoxane and 0.01 mmol of diphenylmethylene (1-ethyl-3-tert-butyl-cyclopentadienyl) (2 , 0.34ml of a toluene solution of 7-di-tert-butylfluorenyl) zirconium dichloride was injected into the autoclave with nitrogen pressure to start the polymerization reaction. During the polymerization reaction, the temperature was adjusted so that the inn...

Synthetic example 2

[0157] ~Synthesis of Polymer B-2~

[0158] 750 ml of 4-methyl-1-pentene was charged at 23° C. into a 1.5-liter SUS autoclave with a capacity of 1.5 liters that had been fully replaced with nitrogen. 0.75 ml of a 1.0 mmol / ml toluene solution of triisobutylaluminum (TIBAL) was charged into the autoclave, and stirring was started.

[0159]Next, the autoclave was heated to an inner temperature of 60° C., and pressurized with propylene so that the total pressure became 0.13 MPa (gauge pressure). Next, pre-prepared methylaluminoxane and diphenylmethylene (1-ethyl-3-tert-butyl-cyclopentadienyl) (2,7-di-tert- 0.34 ml of a toluene solution of 0.01 mmol of butylfluorenyl) zirconium dichloride was injected into the autoclave with nitrogen pressure to start polymerization. During the polymerization reaction, the temperature was adjusted so that the inner temperature of the autoclave was 60°C. Sixty minutes after the start of the polymerization, 5 ml of methanol was pressurized into th...

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Abstract

The present invention addresses the problem of providing a molded article which is formed by disposing a plurality of parts in contact with each other, said parts containing 4-methyl-1-pentene-based polymers, and has high part-to-part adhesion strength, excellent scratch resistance and excellent coloring resistance, and a method for manufacturing the molded article. The molded article according tothe present invention, which contains a specific 4-methyl-1-pentene (co)polymer (A) showing a melting point (Tm) of 200-250 DEG C when measured by DSC and a specific 4-methyl-1-pentene copolymer (B)showing no melting point (Tm) or showing a melting point of 100-199 DEG C when measured by DSC, and comprises a part (1) formed of a composition (X), wherein, relative to 100 parts by mass of the sumof (A) and (B), the content of (co)polymer (A) is 60-95 parts by mass, and a part (2) containing 4-methyl-1-pentene (co)polymer (A), said part (2) being formed in contact with the part (1).

Description

technical field [0001] The present invention relates to a molded body in which a plurality of parts including a 4-methyl-1-pentene polymer are joined together, and a method for producing the same. Background technique [0002] 4-Methyl-1-pentene-based polymers (also called polymethylpentene, PMP, etc.) are used in various applications, taking advantage of their excellent stain resistance and transparency due to their very low surface tension , Excellent damage resistance, and high heat resistance, it is also used as a material for food storage containers and tableware. [0003] However, the following problem has been pointed out: when it is intended to obtain a designed molded body in which a plurality of parts formed of 4-methyl-1-pentene-based polymers are fused by so-called two-color molding, insert molding, etc., the parts Will not bond with sufficient strength. [0004] Patent Document 1 discloses a two-layer molded article using a composition in which polypropylene i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/20B29C45/14C08F10/14
CPCC08F10/14C08L23/20C08L2205/025B29C45/1657C08F210/14B29C45/14C08F2500/17C08F2500/18B29C45/0001B29C45/16B29K2023/18B29K2995/0026B29K2995/0063B29K2995/0087
Inventor 中山裕辅佐佐木丰明吉田健吉藤原和俊
Owner MITSUI CHEM INC
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