EP0333936A1
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EP
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Block copolymer compositions and process for the preparation thereof
Assignee: JSR Corp
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Filing: 1988-03-25
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Granted: —
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Expires: 2008-03-25
Abstract
Abstract A block copolymer composition comprising: 1) 10-60 % by weight of a block copolymer [(A-B₁) ℓ1 ] m -Y₁ 2) 20-90 % by weight of a block copolymer [(A-B₂) ℓ2 ] n -Y₂, and 3) 0-50 % by weight of a block copolymer (A-B₂) ℓ3 , in which A represents an aromatic vinyl compound polymer block having a molecular weight of 10,000-30,000, B₁ a conjugated diene polymer block, having a molecular weight of 25,000-100,000, B₂ a conjugated diene polymer block having a molecular weight of least 1.2 times as high as that of B₁ and Y₁ and Y₂ a halogenated Si and Sn compound residue, respectively and 1₁=1-3, m=2-4, 1₂=1-6, n=2-4 and 1₃=1-6; an adhesive composition containing said block copolymer composition; and a process for the preparation of said block copolymer composition by using the appropriate techniques.
Inventors
- 👤 Toshinori Sakagami
- 👤 Yasuo Toyama
- 👤 Hisaharu Ito
- 👤 Takumi Miyachi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 16:43
CPC Classifications
C; C08; C08L; C08L53/00; C08L53/02; C08F; C08F297/00; C08F297/02; C08F297/04; C08F297/046; C08G; C08G81/00; C08G81/02; C08G81/021; C08G81/022; C09; C09J; C09J153/00; C09J153/02; C08L2666/00; C08L2666/02; C08L2666/24
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
311 words
A block copolymer composition which comprises the following components:- Component 1:- in the range of from 10 to 60% by weight of a block copolymer represented by the general formula I [(A-B₁)1₁] m -Y₁, (I) wherein A represents an aromatic vinyl compound polymer block having a molecular weight in the range of from 10,000 to 30,000 and B₁ a conjugated diene polymer block having a molecular weight in the range of from 25,000 to 100,000, 1₁ is an integer in the range of from 1 to 3, m is an integer in the range of from 2 to 4 and Y₁ represents a halogenated silicon compound residue; Component 2:- in the range of from 20 to 90% by weight of a block copolymer represented by the general formula II [(A-B₂)1₂] n -Y₂ (II) wherein A represents an aromatic vinyl compound polymer block having a molecular weight in the range of from 10,000 to 30,000 and B₂ a conjugated diene polymer block having a molecular weight that is at least 1.2 times as high as that of the conjugated diene polymer block B₁ in the general formula I, 1₂ is an integer in the range of from 1 to 6, n is an integer in the range of from 2 to 4 and Y₂ represents a halogenated tin compound residue; and Component 3:- in the range of from 0 to 50% by weight of a block copolymer represented by the general formula III (A-B₂)1₃, (III) wherein A represents an aromatic vinyl compound polymer block having a molecular weight in the range of from 10,000 to 30,000 and B₂ a conjugated diene polymer block having a molecular weight that is at least 1.2 times as high as that of the conjugated diene polymer block B₁ in the general formula I, and 1₃ is an integer in the range of from 1 to 6.
Claim 2
Dependent Claim
311 words
A block copolymer composition which comprises the following components:- Component 1:- in the range of from 10 to 60% by weight of a block copolymer represented by the general formula I [(A-B₁)1₁] m -Y₁, (I) wherein A represents an aromatic vinyl compound polymer block having a molecular weight in the range of from 10,000 to 30,000 and B₁ a conjugated diene polymer block having a molecular weight in the range of from 25,000 to 100,000, 1₁ is an integer in the range of from 1 to 3, m is an integer in the range of from 2 to 4 and Y₁ represents a halogenated silicon compound residue; Component 2:- in the range of from 20 to 90% by weight of a block copolymer represented by the general formula II [(A-B₂)1₂] n -Y₂ (II) wherein A represents an aromatic vinyl compound polymer block having a molecular weight in the range of from 10,000 to 30,000 and B₂ a conjugated diene polymer block having a molecular weight that is at least 1.2 times as high as that of the conjugated diene polymer block B₁ in the general formula I, 1₂ is an integer in the range of from 1 to 6, n is an integer in the range of from 2 to 4 and Y₂ represents a halogenated tin compound residue; and Component 3:- in the range of from 0 to 50% by weight of a block copolymer represented by the general formula III (A-B₂)1₃, (III) wherein A represents an aromatic vinyl compound polymer block having a molecular weight in the range of from 10,000 to 30,000 and B₂ a conjugated diene polymer block having a molecular weight that is at least 1.2 times as high as that of the conjugated diene polymer block B₁ in the general formula I, and 1₃ is an integer in the range of from 1 to 6.
Claim 3
Dependent Claim
25 words
A block copolymer composition as claimed in claim 1, in which A in the general formulae I, II and III represents a styrene polymer block.
Claim 4
Dependent Claim
49 words
A block copolymer composition as claimed in claim 1 or 2 in which B₁ in the general formula I and B₂ in the general formulae II and III represent a polymer block of a conjugated diene having in the range of from four to eight carbon atoms per molecule.
Claim 5
Dependent Claim
16 words
A block copolymer composition as claimed in claim 3 in which the conjugated diene is isoprene.
Claim 6
Dependent Claim
97 words
A block copolymer composition as claimed in any one of the preceding claims in which the halogenated silicon compound residue Y₁ in the general formula I and the halogenated tin compound residue Y₂ in the general formula II are derived from a halogenated silicon compound having the general formula IV and a halogenated tin compound having the general formula V, respectively, in which R₁ and R₂ each represent a hydrogen or halogen atom or an alkyl group having in the range of from 1 to 20 carbon atoms and X₁ and X₂ each represent a halogen atom.
Claim 7
Dependent Claim
66 words
A block copolymer composition as claimed in claim 5 in which the residues Y₁ and Y₂ are derived from a silicon compound and a tin compound having the general formulae IV and V, respectively, in which R₁ and R₂ each represent an alkyl group having in the range of from 1 to 8 carbon atoms and X₁ and X₂ each represent a chlorine or bromine atom.
Claim 8
Dependent Claim
62 words
A block copolymer composition as claimed in any one of the preceding claims which comprises in the range of from 20 to 50% by weight of component 1; in the range of from 30 to 77% by weight of component 2; and in the range of from 3 to 40% by weight of component 3, the sum of the percentages being 100.
Claim 9
Dependent Claim
55 words
An adhesive composition which comprises a) 100 parts by weight of a block copolymer composition as claimed in any one of the preceding claims, b) in the range of from 20 to 300 parts by weight of a tackifier, and c) in the range of from 0 to 200 parts by weight of a softener.
Claim 10
Dependent Claim
12 words
A shaped article containing an adhesive composition as claimed in claim 8.
Claim 11
Dependent Claim
18 words
A shaped article containing a block copolymer composition as claimed in any one of claims 1 to 7.
Claim 12
Dependent Claim
249 words
A process for the preparation of a block copolymer composition as claimed in any one of claims 1 to 7 characterized in that the process is carried out in the presence of a hydrocarbon solvent and using an organic lithium compound as polymerization initiator, and in that the preparation comprises the following consecutive steps: Step 1:- a) polymerizing an aromatic vinyl compound until an aromatic vinyl compound polymer block A as defined in the general formula I having a molecular weight in the range of from 10,000 to 30,000 is obtained, b) adding a conjugated diene compound and polymerizing until a conjugated diene polymer block B₁ as defined in the general formula I and having a molecular weight in the range of from 25,000 to 100,000 is obtained, and optionally repeating step 1 one or two times; Step 2:- Adding a halogenated silicon compound and coupling in the range of from 10 to 60% of the total block copolymer formed in step 1 with formation of the residue Y₁ in the general formula I; Step 3:- Adding a conjugated diene compound again and polymerizing until the conjugated diene polymer block B₂, as defined in the general formula II and having a molecular weight in the range of from 30,000 to 300,000 is obtained; and Step 4:- After step 3 adding a halogenated tin compound and coupling the aromatic vinyl compound-conjugated diene block copolymer formed in the afore-mentioned steps with formation of the residue Y₂ in the general formula II.
References Cited (Backward Citations)
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