CA2524852A1 - Block copolymer composition and transparent elastomeric articles produced therefrom - Google Patents

Block copolymer composition and transparent elastomeric articles produced therefrom Download PDF

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Publication number
CA2524852A1
CA2524852A1 CA002524852A CA2524852A CA2524852A1 CA 2524852 A1 CA2524852 A1 CA 2524852A1 CA 002524852 A CA002524852 A CA 002524852A CA 2524852 A CA2524852 A CA 2524852A CA 2524852 A1 CA2524852 A1 CA 2524852A1
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CA
Canada
Prior art keywords
block copolymer
monovinylidene aromatic
weight
block
percent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002524852A
Other languages
French (fr)
Other versions
CA2524852C (en
Inventor
Andre J. Uzee
Michael O. Myers
Kenneth A. Toney
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TSRC (USA) Investment Corp
Original Assignee
Dow Global Technologies Inc.
Andre J. Uzee
Michael O. Myers
Kenneth A. Toney
Dow Global Technologies Llc
Tsrc (Usa) Investment Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dow Global Technologies Inc., Andre J. Uzee, Michael O. Myers, Kenneth A. Toney, Dow Global Technologies Llc, Tsrc (Usa) Investment Corporation filed Critical Dow Global Technologies Inc.
Publication of CA2524852A1 publication Critical patent/CA2524852A1/en
Application granted granted Critical
Publication of CA2524852C publication Critical patent/CA2524852C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
    • C08L25/02—Homopolymers or copolymers of hydrocarbons
    • C08L25/04—Homopolymers or copolymers of styrene
    • C08L25/08—Copolymers of styrene
    • C08L25/10—Copolymers of styrene with conjugated dienes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof

Abstract

The present invention relates to a unique blend of elastomeric and thermoplastic monovinylidene aromatic-conjugated diene block copolymers, which form transparent elastomeric products.

Claims (11)

1. The present invention is a elastomeric polymer blend composition comprising:
A) from 65 to 92 parts by weight of at least one elastomeric monovinylidene aromatic-conjugated diene block copolymer, having a monovinylidene aromatic content of less than 50 weight percent, based on the total weight of the elastomeric copolymer and a weight average molecular weight of from 50,000 to 400,000;
B) from 8 to 35 parts by weight of at least one thermoplastic monovinylidene aromatic-conjugated diene copolymer, having a monovinylidene aromatic content of 50 weight percent or more, based on the total weight of the thermoplastic copolymer and a weight average molecular weight from 50,000 to 300,000; and C) from 0 to 30 parts by weight of an extender oil, based on the total weight of A, B and C.
2. The polymer blend composition of claim 1 wherein the elastomeric block copolymer (A) is selected from A-B-A triblock copolymers, A-B-A-B tetrablock copolymers, A-B-A-B-A pentablock copolymers, and mixtures thereof, wherein each A is independently a polymer block produced from a monovinylidene aromatic monomer and each B is independently, a polymer block produced from a conjugated diene and optionally a monovinylidene aromatic monomer.
3. The polymer blend composition of claim 1 wherein the thermoplastic block copolymer (B) is selected from A-B block copolymers, A-B-A triblock copolymers, A-B-A-B tetrablock copolymers, A-B-A-B-A pentablock copolymers, and mixtures thereof, wherein each A is independently a polymer block produced from a monovinylidene aromatic monomer and each B is independently, a polymer block produced from a conjugated diene and optionally a monovinylidene aromatic monomer.
4. The polymer blend composition of claim 1 wherein each monovinylidene aromatic monomer is selected from styrene, alpha-methylstyrene, vinyltoluene, vinylpyridine or mixtures thereof; and each conjugated diene is selected from 1,3-butadiene, isoprene, 1,3-pentadiene or mixtures thereof.
5. The polymer blend composition of Claim 1 wherein each monovinylidene aromatic monomer block of the elastomeric block copolymer has a peak weight average molecular weight of 9,000 or more and each conjugated diene block of the elastomeric block copolymer has a peak weight average molecular weight of 50,000 or more.
6. The polymer blend composition of Claim 1 wherein the block copolymer of (A) and/or the block copolymer of (B) is a radial block copolymer.
7. The polymer blend composition of Claim 1 wherein the elastomeric block copolymer has a refractive index of from 1.5240 to 1.5526 and/or the thermoplastic block copolymer has a refractive index of 1.5526 to 1.5925.
8. The polymer blend composition of Claim 1 wherein each monovinylidene aromatic monomer block of the thermoplastic block copolymer has a peak weight average molecular weight of 12,500 or more and each conjugated diene block of the thermoplastic block copolymer has a peak weight average molecular weight of 2,500 or more.
9. The polymer blend composition of Claim 1, having the following properties:
a tensile strength greater than 10.0 MPa;
a peak force at 200 percent elongation of greater than 0.7 MPa a set of 15 percent or less;
a stress relaxation of 20 percent or less;
a percent haze of less than 50 percent; and a percent transparency of greater than 75 percent.
10. A process for producing the composition of Claim 1 comprising:
-polymerizing a monovinylidene aromatic monomer and a diene monomer to produce an elastomeric block copolymer polymerization mixture comprising a block copolymer of less than 50 weight percent monovinylidene aromatic monomer, based on the total weight of the block copolymer;
-polymerizing a monovinylidene aromatic monomer and a diene monomer to produce a thermoplastic block copolymer polymerization mixture comprising a block copolymer of at least 50 weight percent monovinylidene aromatic monomer, based on the total weight of the block copolymer;
-contacting the elastomeric copolymer polymerization mixture with the thermoplastic copolymer polymerization mixture to form a blended polymerization mixture;
-devolatilizing the blended polymerization mixture to form a blended polymer product, and -pelletizing the blended polymer product.
11. An article produced from the polymer blend of Claim 1.
CA2524852A 2003-05-14 2004-04-13 Block copolymer composition and transparent elastomeric articles produced therefrom Expired - Fee Related CA2524852C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US47046103P 2003-05-14 2003-05-14
US60/470,461 2003-05-14
PCT/US2004/011273 WO2004104095A1 (en) 2003-05-14 2004-04-13 Block copolymer composition and transparent elastomeric articles produced therefrom

Publications (2)

Publication Number Publication Date
CA2524852A1 true CA2524852A1 (en) 2004-12-02
CA2524852C CA2524852C (en) 2012-02-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA2524852A Expired - Fee Related CA2524852C (en) 2003-05-14 2004-04-13 Block copolymer composition and transparent elastomeric articles produced therefrom

Country Status (11)

Country Link
US (1) US7700688B2 (en)
EP (1) EP1625178B1 (en)
JP (1) JP4532496B2 (en)
CN (1) CN100420713C (en)
AT (1) ATE366283T1 (en)
CA (1) CA2524852C (en)
DE (1) DE602004007379T2 (en)
ES (1) ES2289562T3 (en)
PL (1) PL1625178T3 (en)
TW (1) TW200424244A (en)
WO (1) WO2004104095A1 (en)

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US9758648B2 (en) * 2015-03-30 2017-09-12 Kraton Polymers U.S. Llc Curable transparent rubber composition, a cured transparent rubber composition made thereof, and manufacturing process for the same
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Also Published As

Publication number Publication date
TW200424244A (en) 2004-11-16
DE602004007379T2 (en) 2008-03-06
EP1625178B1 (en) 2007-07-04
US7700688B2 (en) 2010-04-20
ES2289562T3 (en) 2008-02-01
JP2006528273A (en) 2006-12-14
CN100420713C (en) 2008-09-24
CA2524852C (en) 2012-02-21
DE602004007379D1 (en) 2007-08-16
JP4532496B2 (en) 2010-08-25
US20060205874A1 (en) 2006-09-14
PL1625178T3 (en) 2007-11-30
EP1625178A1 (en) 2006-02-15
CN1788051A (en) 2006-06-14
ATE366283T1 (en) 2007-07-15
WO2004104095A1 (en) 2004-12-02

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