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Block copolymer composition, method for producing the same, and film of the same

A technology of block copolymer and composition, which is applied in the field of block copolymer composition, its preparation and film, and achieves good productivity

Active Publication Date: 2011-02-23
ZEON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the techniques described in the above-mentioned documents are still insufficient in terms of the coexistence of high elastic modulus and small permanent elongation at a high level, and further improvement is required.

Method used

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  • Block copolymer composition, method for producing the same, and film of the same
  • Block copolymer composition, method for producing the same, and film of the same
  • Block copolymer composition, method for producing the same, and film of the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0153] Add 23.3kg of cyclohexane, 2.2mmol of N,N,N',N'-tetramethylethylenediamine (hereinafter referred to as "TMEDA") and 1.40kg of styrene in the pressure reactor, After stirring at 40°C, 149.6 mmol of n-butyllithium was added, and the mixture was polymerized for 1 hour while raising the temperature to 50°C. The polymerization conversion rate of styrene was 100%.

[0154] Next, while controlling the temperature to keep it at 50-60°C, 6.50 kg of isoprene was continuously added to the reactor within 1 hour. After the addition of isoprene was completed, polymerization was further carried out for 1 hour. The polymerization conversion rate of isoprene was 100%.

[0155] Next, 47.1 mmol of dimethyldichlorosilane was added as a coupling agent, and a coupling reaction was performed for 2 hours to form a styrene-isoprene-styrene block copolymer as a block copolymer B.

[0156] Then, the temperature was controlled so as to be maintained at 50 to 60° C., and 2.10 kg of styrene was c...

Embodiment 2～4

[0168] The amounts of styrene, n-butyllithium, TMEDA, dimethyldichlorosilane and methanol are shown in Table 1 respectively, and the reaction is carried out in the same manner as in Example 1 except for the changed part, and a part of the prepared reaction solution is taken out , The same measurement as in Example 1 was carried out. The measured values ​​are shown in Table 2.

[0169] The following operations were the same as in Example 1, and block copolymer compositions 2 to 4 were recovered and pelletized. Using the pellets, the melt indices of block copolymer compositions 2-4 were measured. The results are shown in Table 2.

[0170] In addition, films of block copolymer compositions 2 to 4 were prepared from the above pellets. The same measurement as in Example 1 was performed on the film. The results are shown in Table 2.

Embodiment 5

[0172] Add 23.3kg of cyclohexane, 1.9mmol of TMEDA and 1.30kg of styrene to the pressure reactor, stir at 40°C, add 126.2mmol of n-butyllithium, and let the The polymerization was carried out for 1 hour. The polymerization conversion rate of styrene was 100%.

[0173] Next, while controlling the temperature so as to keep it at 50-60°C, 6.00 kg of isoprene was continuously added to the reactor within 1 hour. After the addition of isoprene was completed, polymerization was further carried out for 1 hour. The polymerization conversion rate of isoprene was 100%.

[0174] Next, 26.5 mmol of dimethyldichlorosilane was added as a coupling agent, and a coupling reaction was performed for 2 hours to form a styrene-isoprene-styrene block copolymer as a block copolymer B.

[0175] Here, some of the living ends of the styrene-isoprene block copolymer were deactivated by adding 13.9 mmoles of methanol to the reactor. Then, the temperature was controlled so as to keep it at 50-60° C., a...

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Abstract

The invention provides a block copolymer composition containing an aromatic vinyl-conjugated diene-aromatic vinyl block copolymer having a high-level balance between high elastic modulus and small permanent elongation. The block copolymer composition contains a block copolymer A represented by formula (A) and a block copolymer B represented by formula (B). The weight ratio between the block copolymer A and the block copolymer B (A / B) is from 36 / 64 to 85 / 15, and the ratio of the aromatic vinyl monomer units relative to all polymer components in the block copolymer composition is 27-70% by weight. In the formulae, Ar1a, Ar1b and Ar2b each represents an aromatic vinyl polymer block having an Mw of 6,000-18,000; Ar2a represents an aromatic vinyl polymer block having an Mw of 40,000-400,000; Da and Db each represents a conjugated diene polymer block having a vinyl bond content of 1-20% by mole; and Db has an Mw of 60,000-400,000. Arla-Da-Ar2a (A), Ar1b-Db-Ar2b (B).

Description

technical field [0001] The present invention relates to a block copolymer composition formed by containing aromatic vinyl-conjugated diene-aromatic vinyl block copolymer, its preparation method and a film of the block copolymer composition, more specifically In other words, it relates to a block copolymer composition, a method for preparing a block copolymer composition suitable for making the same, and a film of said block copolymer composition, said block copolymer composition being It is suitable as a material for molding stretchable films suitable for use as parts of sanitary products such as disposable diapers and sanitary products, etc., and has both high elastic modulus and small permanent elongation. Background technique [0002] Due to aromatic vinyl-conjugated diene-aromatic vinyl such as styrene-isoprene-styrene block copolymer (SIS) and styrene-butadiene-styrene block copolymer (SBS) Block copolymers are thermoplastic elastomers having characteristic properties ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L53/02
CPCC08J2353/02C08L53/02C08J5/18C08L2205/02C08L2666/24C08L2666/02
Inventor 大石刚史小田亮二
Owner ZEON CORP
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