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Block polymer and antistatic agent comprising the same

A technology of block polymers and polymers, applied in the direction of chemical instruments and methods, other chemical processes, etc., can solve the problems of resin mechanical strength and moldability decline, insufficient compatibility, mold pollution, etc.

Inactive Publication Date: 2008-09-03
SANYO CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, the disadvantage of this method is that polyether ester amide is hardly oriented on the molding surface of crystalline polyolefin, and in extrusion molding or compression molding without shearing action, a large amount of antistatic agent such as polyether ester must be added. Amide
[0007] Moreover, the compatibility is insufficient, which creates problems of mold contamination and / or roll contamination during the molding step
[0008] In addition, since a large amount of compatibilizer is required to improve the compatibility with the resin, the mechanical strength and moldability of the resin are reduced, and this problem has not been solved so far.

Method used

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preparation example Construction

[0338] As for the preparation method of the block polymer (A2), there can be mentioned a method comprising reacting (a4)-(a6) with (b2), and a method comprising, for example, the presence of (a4) during the preparation of (b2). The following method reacts the precursor (reactant) of (b2) to simultaneously form the polymer (b2) block and the block polymer (A2).

[0339] In the case where (b2) is polyetherester amide (b2-1), its production method is not particularly limited, but includes the following methods.

[0340] Those block polymers (A2) in which (b2) is a polymer segment other than polyetheresteramide (b2-1) can be prepared in the same manner.

[0341] Method 1: A method comprising polymerizing (a4-1) represented by general formula (9) and polyether ester amide (b2-1) at 200-250°C under reduced pressure.

[0342] Method 2: A method comprising polymerizing (a4-1), (Q1) and (b1-1) at 200-250°C under reduced pressure.

[0343] Method 3: Comprising one or more of (a4-1), (...

preparation Embodiment 1

[0470] Under nitrogen, 85 parts of low molecular weight polypropylene having a Mn value of 2,500 obtained by thermal degradation and a density of 0.89 was melted together with 15 parts of maleic anhydride at 200° C. for 20 hours.

[0471] Then, excess maleic anhydride was distilled off under reduced pressure to obtain acid-modified polypropylene (a1-1①).

[0472] (a1-1①) has an acid value of 39.8 and a Mn value of 2,800.

preparation Embodiment 2

[0474] Low molecular weight polypropylene (80 parts) with a Mn value of 2,500 obtained by thermal degradation and a density of 0.89 (80 parts) was melted together at 160°C, followed by the addition of 7 parts of maleic anhydride and 14 parts of 12-aminododecanoic acid. The reaction was carried out at 160°C for 1 hour under nitrogen.

[0475] The reaction was continued for another 20 hours at 200°C to obtain acid-modified polypropylene (a1-1②).

[0476](a1-1②) has an acid value of 32.1 and a Mn value of 2,800.

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Abstract

A thermoplastic resin which comprises a resin, especially a polyolefin, and a block polymer comprising polyolefin blocks and hydrophilic polymer blocks and finely dispersed therein without the need of a compatibilizing agent and gives a molding having permanent antistatic properties even when it is molded under shear-free conditions and even when the block polymer amount is small, and which does not foul the molds or rollers during molding because of satisfactory compatibility and has excellent mechanical strength. The block polymer is characterized by having a structure comprising blocks of a polyolefin (a) alternating with blocks of a hydrophilic polymer (b) having a volume resistivity of 10<5> to 10<11> OMEGA .cm. An antistatic agent comprising the block polymer is provided. The resin composition comprises the block polymer and a thermoplastic resin. A molded article obtained by coating or printing a molding of a resin composition containing the block polymer is further provided.

Description

[0001] This application is a divisional application filed on February 10, 2000, with application number 00806003.7, and the title of the invention is "block polymer and antistatic agent containing it". technical field [0002] The present invention relates to a block polymer and an antistatic agent comprising it. [0003] More specifically, the present invention relates to a block polymer useful as an antistatic agent suitable for coating or printing molded articles and an antistatic agent comprising the same. Background technique [0004] Any block polymers having a repeating structure comprising polyolefin blocks and hydrophilic polymer blocks are not known in the prior art. [0005] On the other hand, methods commonly used to prepare thermoplastic resins such as polyolefins with permanent antistatic properties include adding antistatic agents such as polyetheresteramides to the resins, and are known to improve the relationship between polyolefins and polyetheresteramides....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G81/00C08L101/12C09K3/16
Inventor 樋口彰一千田英一
Owner SANYO CHEM IND LTD
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