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Graft-modified propylene/alpha-olefin copolymer and method for producing same

一种烯烃共聚物、接枝改性的技术，应用在接枝改性丙烯·α-烯烃共聚物领域，能够解决成品率降低、臭气、白浊等问题，达到高成品率、确保成品率、乳化性稳定的效果

Active Publication Date: 2016-07-06
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Japanese Patent Application Laid-Open No. 9-278956 describes a method for producing a maleic anhydride-modified polyolefin, which is characterized in that the modification process is carried out by using a twin-screw mixing extruder to melt and knead the mixture. The mixture is obtained by blending 0.1 to 20 parts by weight of maleic anhydride and 0.01 to 20 parts by weight of an organic peroxide with a half-life of 1 minute and a decomposition temperature of 150 to 200°C relative to 100 parts by weight of polyolefin. For the maleic anhydride-modified polyolefin obtained by the method, odor becomes a problem, and in addition, when the aqueous dispersion is prepared from the modified polyolefin, there is also the problem of white turbidity
[0008] In addition, when the modified propylene-α-olefin copolymer is dissolved in a solvent such as toluene to form a primer, there is also a problem that there are components insoluble in the solvent in the primer, resulting in a decrease in yield.

Method used

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  • Graft-modified propylene/alpha-olefin copolymer and method for producing same
  • Graft-modified propylene/alpha-olefin copolymer and method for producing same
  • Graft-modified propylene/alpha-olefin copolymer and method for producing same

Examples

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preparation example Construction

[0092] [Method for producing propylene-α-olefin copolymer (a)]

[0093] The propylene / α-olefin copolymer (a) used in the present invention can be produced using a multi-site catalyst such as a Ziegler catalyst or a single-site catalyst such as a metallocene catalyst. Polymerization of propylene and α-olefin can be carried out by any method of liquid phase polymerization or gas phase polymerization such as suspension polymerization and solution polymerization.

[0094]

[0095] The graft-modified propylene / α-olefin copolymer (A) of the present invention can be obtained by graft-polymerizing a polar monomer onto the above-mentioned propylene / α-olefin copolymer (a).

[0096] Examples of the polar monomer include hydroxyl-containing ethylenically unsaturated compounds, amino-containing ethylenically unsaturated compounds, epoxy-containing ethylenically unsaturated compounds, aromatic vinyl compounds, unsaturated As carboxylic acids and their derivatives, vinyl ester compounds, ...

Embodiment

[0138] In the following examples, the physical properties and the like of the polymer were measured as follows.

[0139] (1) 1-butene content

[0140] For 1-butene content, use 13 Calculated by C-NMR.

[0141] (2) Melt flow rate (MFR)

[0142] The melt flow rate is measured at 230° C. under a load of 2.16 kg in accordance with ASTM D1238.

[0143] (3) Molecular weight distribution (Mw / Mn)

[0144] The molecular weight distribution (Mw / Mn) was measured as follows using GPC-150C manufactured by Millipore Corporation.

[0145] The separation column is TSKGNHHT, and the column size is 27 mm in diameter and 600 mm in length. The temperature of the column is 140° C., and the mobile phase uses o-dichlorobenzene (Wako Pure Chemical Industries) and 0.025% by weight of BHT (Takeda Pharmaceutical) as an antioxidant. ml / min was flowed so that the sample concentration was 0.1% by weight, and the sample injection volume was 500 microliters, and a differential refractometer was used as ...

manufacture example 1

[0166] In a 2-liter autoclave fully replaced with nitrogen, 900 ml of hexane and 90 g of 1-butene were charged, 1 mmol of triisobutylaluminum was added, and after the temperature was raised to 70° C., propylene was supplied so that the total pressure was 7 kg / cm 2 G, add 0.30 millimoles of methyl aluminoxane, converted into rac-dimethylsilylene-bis{1-(2-methyl-4-phenylindenyl)}bis with 0.001 millimoles of Zr atoms Zirconium chloride, while continuously supplying propylene to keep the total pressure at 7kg / cm 2 The G side was polymerized for 30 minutes. After the polymerization, degassing was carried out, and the polymer was recovered in a large amount of methanol, and dried under reduced pressure at 110° C. for 12 hours.

[0167] The obtained propylene·α-olefin polymer (a-1) was 39.7 g, and the polymerization activity was 79 kg·polymer / mmol Zr·hr. The polymer contained 74 mole % of units derived from propylene and 26 mole % of units derived from 1-butene. MFR was 7 g / 10 m...

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Abstract

A graft-modified propylene / alpha-olefin copolymer (A) which is obtained by graft-reacting a polar monomer with a propylene / alpha-olefin copolymer (a) that is composed of 50-90% by mole of a constituent unit (C3) derived from propylene and 10-50% by mole of a constituent unit (C alpha) derived from an alpha-olefin having 4-8 carbon atoms (with the total of the constituent units (C3) and (C alpha) being 100% by mole), and which is characterized by satisfying the following conditions (i)-(iv) at the same time. (i) The graft amount of the polar monomer is 0.4-1.5% by weight. (ii) The content of the polar monomer is 1,000 ppm or less. (iii) The content of a gel insoluble in xylene at 140 DEG C is 2.5% by weight or less. (iv) The content of a volatile hydrocarbon compound is 10 ppm or less.

Description

technical field [0001] The present invention relates to a graft-modified propylene·α-olefin copolymer for which odor (odor) does not become a problem and does not cause problems when dissolved in a solvent. There are insoluble components, and the emulsification is stable when forming a water-based dispersion, and the adhesive strength as a primer is strong. Background technique [0002] Propylene-based polymers that are random copolymers of propylene and 1-butene are used in films, sheets, and the like because they are excellent in heat resistance, transparency, scratch resistance, and the like. [0003] Such a propylene-based polymer has conventionally been produced using a solid titanium-based catalyst or a metallocene-based catalyst containing a metallocene compound such as zirconium or hafnium, and an alkylaluminoxane. [0004] However, conventional propylene-based polymers produced as described above, for example, propylene-based polymers produced using solid titanium-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/46C08F255/02C08L51/06
CPCC08F255/02C08L51/06C08F255/10C08L77/00C08F222/06C08L23/10C08K5/12C08K5/14C08L23/142C08F2500/17C08L2201/02C08L2201/10C08L23/12
Inventor 吉本洸哉中野秀健中村哲也
Owner MITSUI CHEM INC
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