EP0234512A2
Expired / Lapsed
EP
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Crystaline block copolymer and process for producing the same
Assignee: Asahi Kasei Corp
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Filing: 1987-02-19
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Granted: —
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Expires: 2007-02-19
Abstract
Abstract crystalline block copolymer containing at least a triblock chain represented by the formula A-B-C or containing at least a radial structure represented by the formula (D-E X in the polymer chain is provided. These triblock chains or radial structures comprise blocks of a homopolymer of a vinyl aromatic compound or a copolymer of a vinylaromatic compound with another vinylaromatic compound or a conjugated diene compound having a glass transition temperature of not lower that 50°C and a weight average molecular weight in the range of from 2,000 to 100,000 and blocks of a homopolymer of a conjugated diene compound or a copolymer of a conjugated diene compound with another conjugated diene compound or a copolymer of a conjugated diene compound having less that 20 wt.% of a vinyl aromatic compound having a glass transition temperature of not higher than 10°C and a crystallinity at 25°C and a 1,4-trans-linkage ratio in the conjugated diene portion of 80 % or higher. These crystalline block copolymers are produced by polymerization of the respective monomers in the presence of a composite catalyst comprising the catalyst components (a), (b) and (c), or (a), (b), (c) and (d), wherein (a) is an organic compound of barium or strontium; (b) is an organic compound of lithium; (c) is an organomagnesium compound; and (d) is an organoaluminum or organozinc compound. Further provided are shaped bodies obtainable by injection, extrusion or compression molding comprising such crystalline block copolymer.
Inventors
- 👤 Ikematu Takeshi
- 👤 Morita Hideo
- 👤 Hirata Akiyoshi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 16:08
CPC Classifications
C; C08; C08F; C08F297/00; C08F297/02; C08F297/04
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
173 words
A crystalline block copolymer containing at least a triblock chain represented by the formula A-B-C in the polymer chain, wherein A and C each represent a block comprising a homopolymer of a vinyl aromatic compound or a copolymer of a vinylaromatic compound with another vinylaromatic compound or a conjugated diene compound having a glass transition temperature of not lower than 50 °C and a weight average molecular weight in the range of from 2,000 to 100,000, and A and C may have either the same or different structures; B represents a block comprising a homopolymer of a conjugated diene compound or a copolymer of a conjugated diene compound with another conjugated diene compound or a copolymer of a conjugated diene compound having less than 20 wt.% of a vinylaromatic compound having a glass transition temperature of not higher than 10 °C, a crystallinity at 25 °C and a weight average molecular weight in the range of from 25,000 to 1,000,000 and a 1,4-trans-linkage ratio at the conjugated diene portion of 80% or higher.
Claim 2
Dependent Claim
173 words
A crystalline block copolymer containing at least a triblock chain represented by the formula A-B-C in the polymer chain, wherein A and C each represent a block comprising a homopolymer of a vinyl aromatic compound or a copolymer of a vinylaromatic compound with another vinylaromatic compound or a conjugated diene compound having a glass transition temperature of not lower than 50 °C and a weight average molecular weight in the range of from 2,000 to 100,000, and A and C may have either the same or different structures; B represents a block comprising a homopolymer of a conjugated diene compound or a copolymer of a conjugated diene compound with another conjugated diene compound or a copolymer of a conjugated diene compound having less than 20 wt.% of a vinylaromatic compound having a glass transition temperature of not higher than 10 °C, a crystallinity at 25 °C and a weight average molecular weight in the range of from 25,000 to 1,000,000 and a 1,4-trans-linkage ratio at the conjugated diene portion of 80% or higher.
Claim 3
Dependent Claim
172 words
A crystalline block copolymer containing at least a radial structure represented by the formula (D-E X in the polymer chain, wherein D represents a block comprising a homopolymer of a vinylaromatic compound or a copolymer ofa vinylaromatic compound with another vinylaromatic compound or a conjugated diene compound having a glass transition temperature of not lower than 50 °C and a weight average molecular weight in the range of from 2,000 to 100,000; E represents a block comprising a homopolymer of a conjugated diene compound, or a copolymer of a conjugated diene compound with another conjugated diene compound or a copolymer of a conjugated diene compound having less than 20 wt.% of a vinyl aromatic compound having a glass transition temperature of not higher than 10 °C, crystallinity at 25 °C, a weight average molecular weight in the range of from 10,000 to 500,000 and a 1,4-trans-linkage ratio at the conjugated diene portion of 80% or higher; X represents a terminal coupling agent and n is an integer of from 2 to 10.
Claim 4
Dependent Claim
172 words
A crystalline block copolymer containing at least a radial structure represented by the formula (D-E X in the polymer chain, wherein D represents a block comprising a homopolymer of a vinylaromatic compound or a copolymer ofa vinylaromatic compound with another vinylaromatic compound or a conjugated diene compound having a glass transition temperature of not lower than 50 °C and a weight average molecular weight in the range of from 2,000 to 100,000; E represents a block comprising a homopolymer of a conjugated diene compound, or a copolymer of a conjugated diene compound with another conjugated diene compound or a copolymer of a conjugated diene compound having less than 20 wt.% of a vinyl aromatic compound having a glass transition temperature of not higher than 10 °C, crystallinity at 25 °C, a weight average molecular weight in the range of from 10,000 to 500,000 and a 1,4-trans-linkage ratio at the conjugated diene portion of 80% or higher; X represents a terminal coupling agent and n is an integer of from 2 to 10.
Claim 5
Dependent Claim
79 words
A process for producing a crystalline block copolymer according to Claim I, which comprises polymerizing successively the monomers selected from vinylaromatic monomers, conjugated diene monomers or a mixture thereof, by using a composite catalyst comprising the catalyst components (a), (b) and - (c), or (a), (b), (c) and (d), wherein (a) is an organic compound of barium or strontium; (b) is an organic compound of lithium; (c) is an organomagnesium compound; and (d) is an organoaluminum or organozinc compound.
Claim 6
Dependent Claim
93 words
A process for producing a crystalline block copolymer according to Claim 2, which comprises polymerizing successively the monomers selected from vinylaromatic monomers, conjugated diene monomers or a mixture thereof, by using a composite catalyst comprising the catalyst components (a), (b) and - (c), or (a), (b), (c) and (d) shown below, and then carrying out the reaction with addition of a coupling agent, wherein (a) is an organic compound of barium or strontium; (b) is an organic compound of lithium; (c) is an organomagnesium compound; and (d) is an organoaluminum or organozinc compound.
Claim 7
Dependent Claim
113 words
A process for producing a crystalline block copolymer according to Claim 2, which comprises homopolymerizing a vinylaromatic monomer or copolymerizing said monomer with another vinylaromatic monomer or a conjugated diene monomer by using a composite catalyst comprising the catalyst components (b) and (c) as shown below, then homopolymerizing a conjugated diene monomer or copolymerizing said monomer with another conjugated diene monomer or an aromatic vinyl monomer with addition of the catalyst component (e) shown below, and further carrying out the reaction with addition of a coupling agent, wherein (b) is an organic compound of lithium; (c) is an organomagnesium compound; and (e) is a rare earth metal (Ln) salt of an organic acid.
Claim 8
Dependent Claim
22 words
A process for producing a crystalline block copolymer according to Claim 5, wherein (e) is a lanthanum salt of an organic phosphate.
Claim 9
Dependent Claim
26 words
A composition of crystalline block copolymers, comprising at least 30 wt.% of a crystalline block copolymer according to Claim I or 2 as the polymer component.
Claim 10
Dependent Claim
31 words
A composition of crystalline block copolymers according to Claim 7, which further contains 5 to 100 parts by weight of an inorganic filler per 100 parts by weight of said composition.
Claim 11
Dependent Claim
45 words
A composition of crystalline block copolymers according to Claim 7 or 8, wherein 70 to 5 wt.% of at least one polymer component selected from trans-isoprene polymers, e-caproiactone polymers, polystyrene or polyphenylene ether is contained as the polymer component other than the crystalline block copolymer.
Claim 12
Dependent Claim
35 words
An injection, extrusion or compression molded product, comprising a crystalline block copolymer according to Claim I or Claim 2 or a composition of crystalline block copolymers according to any one of Claims 7 to 9.
Claim 13
Dependent Claim
10 words
A molded product according to Claim 10,'which is shape memorizable.
Claim 14
Dependent Claim
14 words
A doll or an artificial flower, comprising the molded product according to Claim 11.
Claim 15
Dependent Claim
14 words
A plaster cast or splint material, comprising the molded product according to Claim 10.
Claim 16
Dependent Claim
12 words
A frame work material, comprising the molded product according to Claim 10.
Claim 17
Dependent Claim
19 words
A heat-shrinkable molded product, obtained by subjecting the molded product according to Claim 10 to stretching or expanding treatment.
Claim 18
Dependent Claim
14 words
A coupling device or a sleeve, comprising the molded product according to Claim 15.
Claim 19
Dependent Claim
17 words
A wire coating tube or a wire binding tube, comprising the molded product according to Claim 15.
Claim 20
Dependent Claim
13 words
A film or a laminate, comprising the molded product according to Claim 15.
References Cited (Backward Citations)
No citation records indexed.
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