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Hydrogenated copolymer

A technology of hydrogenated copolymers and copolymers, applied in the field of hydrogenated copolymers, can solve the problems of lack of flexibility, unsuitability for soft vinyl chloride resins, and not yet produced

Inactive Publication Date: 2009-01-14
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrogenated copolymers disclosed in the above-mentioned gazettes are all crystalline polymers, so they lack flexibility and are not suitable for applications using soft vinyl chloride resins.
[0008] As mentioned above, since soft vinyl chloride resin has various environmental problems, it is urgent to develop its substitute material, but the reality is that it has not been produced yet. scratch resistance, etc.)

Method used

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Examples

Experimental program
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Effect test

reference example 1

[0304]

[0305] In the following examples and comparative examples, non-hydrogenated copolymers and hydrogenation catalysts for hydrogenation of non-hydrogenated copolymers were prepared by the following methods.

[0306] Put 1 liter of dry and refined cyclohexane into a reaction vessel replaced with nitrogen, add 100 mmoles of bis(η 5 -cyclopentadienyl)titanium dichloride. While fully stirring the mixture in the reaction vessel, a n-hexane solution containing 200 mmol of trimethylaluminum was added thereto, and reacted at room temperature for about 3 days to prepare a titanium-containing hydrogenation catalyst.

Embodiment 1

[0308] Continuous polymerization of the non-hydrogenated copolymer was carried out by the following method using two tank reactors with a stirring device and a jacket having an internal volume of 10 liters.

[0309]To the bottom of the first reactor, a cyclohexane solution with a butadiene concentration of 24% by weight was supplied at 4.51 liters / hr, a cyclohexane solution with a styrene concentration of 24% by weight was supplied at 5.97 liters / hr, and a cyclohexane solution with a styrene concentration of 2.0 Liter / hr supplies the cyclohexane solution of n-butyllithium, the concentration of the cyclohexane solution of n-butyllithium is adjusted so that, per 100 parts by weight of monomer (total amount of butadiene and styrene), n-butyl The amount of base lithium is 0.077 parts by weight, and then supply the cyclohexane solution of N, N, N', N'-tetramethylethylenediamine, the supply rate is, relative to every 1 mole of n-butyllithium, N, The amount of N,N',N'-tetramethylethy...

Embodiment 2

[0315] In addition to changing the supply rate of the butadiene solution supplied to the first station to 3.38 liters / hr and the supply rate of the styrene solution to 6.87 liters / hr, the supply rate of the styrene solution supplied to the second station was changed to 2.95 liters / hr hr, continuous polymerization was carried out in the same manner as in Example 1 to obtain a non-hydrogenated copolymer. Subsequently, a hydrogenation reaction was carried out in the same manner as in Example 1 to obtain a hydrogenated copolymer (Polymer-2). The properties of Polymer-2 are shown in Table 1.

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Abstract

Disclosed is a hydrogenated copolymer obtained by hydrogenating an unhydrogenated copolymer comprising conjugated diene monomer units and vinyl aromatic monomer units, the unhydrogenated copolymer having at least one polymer block (H) of vinyl aromatic monomer units, wherein the hydrogenated copolymer has the following characteristics: (1) a content of the vinyl aromatic monomer units of from more than 60% by weight to less than 90% by weight, based on the weight of the hydrogenated copolymer; (2) a content of the polymer block (H) of from 1 to 40% by weight, based on the weight of the unhydrogenated copolymer; (3) a weight average molecular weight of from more than 100,000 to 1,000,000; (4) a hydrogenation ratio of 85% or more, as measured with respect to the double bonds in the conjugated diene monomer units; and (5) substantially no crystallization peak observed at -50 to 100 DEG C. in a differential scanning calorimetry (DSC) chart obtained with respect to the hydrogenated copolymer.

Description

technical field [0001] The present invention relates to a hydrogenated copolymer. More particularly, it relates to a polymer block containing at least one vinyl aromatic monomer unit obtained by hydrogenating a non-hydrogenated copolymer containing a conjugated diene monomer unit and a vinyl aromatic monomer unit (H) hydrogenated copolymer, the content of the vinyl aromatic monomer unit, the content of the polymer block (H), the weight average molecular weight and the hydrogenation rate of the double bond of the conjugated diene monomer unit in a specific range, and in the differential scanning calorimetry (DSC) chart obtained from the hydrogenated copolymer, there is substantially no crystallization peak in the range of -50 to 100°C. The hydrogenated copolymer of the present invention is rich in flexibility, is excellent in impact resilience and scratch resistance, and is good in handling properties (blocking resistance). The term "adhesive resistance" refers to the resista...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F8/04C08F8/00C08J9/04C08J5/00C08L25/10
CPCC08F8/04Y10T428/31855C08F293/00C08F212/00
Inventor 笹川雅弘高山茂树佐佐木茂久末隆宽铃木胜美中岛滋夫
Owner ASAHI KASEI KK
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