Patent EP0322977A2 successfully refreshed from Google Patents.
EP0322977A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Impact resistant blends of polar thermoplastic polymers and modified block copolymers
Assignee: Shell Internationale Research Maatschappij BV
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Filing: 1988-12-20
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Granted: —
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Expires: 2008-12-20
Abstract
Abstract A multiphase thermoplastic composition is provided by incorporating at least one polar thermoplastic polymer with at least one functionalized, selectively hydrogenated alkenyl arene/conjugated diene block copolymer to which has been grafted an effective amount of carboxyl functional groups primarily in the alkenyl arene blocks thereof. The carboxyl functional groups may be in the form of carboxylic acids, their salts and esters, and combinations thereof. The rubbery compositions of the present invention possess improved tensile strength, high temperature mechanical properties and oil resistance.
Inventors
- 👤 Michael John Modic
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 16:26
CPC Classifications
C; C08; C08F; C08F287/00; C08L; C08L51/00; C08L51/003; C08L77/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
181 words
A multiphase thermoplastic composition comprising: a) one phase containing at least one polar thermoplastic polymer each containing at least one polar functional group; and b) at least one other phase containing at least one functionalized, selectively hydrogenated block copolymer to which has been grafted on the average an effective amount of carboxyl functional groups for imparting improved tensile strength, high temperature mechanical properties and oil resistance to said multiphase thermoplastic composition, said functionalized block copolymer comprising 1) a base block copolymer which comprises i) at least one polymer block A, said A block being predominantly a polymerized alkenyl arene block, and ii) at least one selectively hydrogenated polymer block B, said B block prior to hydrogenation being predominantly a polymerized conjugated diene block, 2) wherein substantially all of said carboxyl functional groups are grafted to said base block copolymer on said A blocks, c) said one phase (a) being present in a weight ratio of 1:99 up to less than 50:50 relative to said at least one other phase (b), and d) said polar thermoplastic polymer excluding said functionalized block copolymer.
Claim 2
Dependent Claim
181 words
A multiphase thermoplastic composition comprising: a) one phase containing at least one polar thermoplastic polymer each containing at least one polar functional group; and b) at least one other phase containing at least one functionalized, selectively hydrogenated block copolymer to which has been grafted on the average an effective amount of carboxyl functional groups for imparting improved tensile strength, high temperature mechanical properties and oil resistance to said multiphase thermoplastic composition, said functionalized block copolymer comprising 1) a base block copolymer which comprises i) at least one polymer block A, said A block being predominantly a polymerized alkenyl arene block, and ii) at least one selectively hydrogenated polymer block B, said B block prior to hydrogenation being predominantly a polymerized conjugated diene block, 2) wherein substantially all of said carboxyl functional groups are grafted to said base block copolymer on said A blocks, c) said one phase (a) being present in a weight ratio of 1:99 up to less than 50:50 relative to said at least one other phase (b), and d) said polar thermoplastic polymer excluding said functionalized block copolymer.
Claim 3
Dependent Claim
26 words
The composition according to claim 1, wherein said carboxyl functional groups are carboxylic acids, their salts, their esters, and combinations of two or more of these.
Claim 4
Dependent Claim
74 words
The composition according to the claims 1-2, wherein said functionalized block copolymer is characterized as having been prepared by the process which comprises metalating said base block copolymer, and reacting the resulting metalated base block copolymer with effective amounts of at least one graftable electrophilic molecule containing at least one of said carboxyl functional groups or with effective amounts of an electrophile, wherein said electrophile is carbon dioxide, thereby preparing said functionalized block copolymer.
Claim 5
Dependent Claim
49 words
The composition according to claim 3, wherein said effective amount of carboxyl functional groups is on the average in an amount from one of said carboxyl functional groups per molecule of said functionalized block copolymer to one of said carboxyl functional groups per aromatic ring of said A block.
Claim 6
Dependent Claim
45 words
The composition according to any one of the claims 1-4, wherein said polar thermoplastic polymers each contain at least one polar functional group selected from an amino group, hydroxyl group, thiol group, carboxyl group, isocyanate group epoxy group and halogen group and groups derived therefrom.
Claim 7
Dependent Claim
22 words
The composition according to claim 5, wherein said polyamide is selected from the group consisting of straight chain and branched chain polyamides.
Claim 8
Dependent Claim
129 words
The composition according to any one of the claims 1-6, wherein (a) each of said A blocks prior to hydrogenation is predominantly a polymerized monoalkenyl monocyclic arene block having an average molecular weight of 1,000 to 125,000, (b) each of said B blocks prior to hydrogenation is predominantly a polymerized conjugated diene block having an average molecular weight of 10,000 to 450,000, (c) said A blocks constituting 1 to 99 percent by weight of said base block copolymer, (d) the residual ethylenic unsaturation of said B block is less than 10 percent of the ethylenic unsaturation of said B blocks prior to hydrogenation, and (e) the residual aromatic unsaturation of said A blocks is greater than 50 percent of the aromatic unsaturation of said A block prior to hydrogenation.
Claim 9
Dependent Claim
26 words
The composition according to any one of the claims 1-7, wherein said A blocks constitute 2 to 60 percent by weight of said base block copolymer.
Claim 10
Dependent Claim
54 words
The composition according to any one of the claims 1-8, wherein said effective amount of carboxyl function groups is on the average in an amount from ten of said carboxyl functional groups per molecule of said copolymer to one of said carboxyl functional groups per at least one aromatic ring of said A block.
Claim 11
Dependent Claim
43 words
The composition according to any one of the claims 1-9, wherein prior to hydrogenation: (a) said A block is polymerized styrene and (b) said B block is selected from the group consisting of polymerized isoprene, polymerized butadiene, and polymerized isoprene and butadiene copolymer.
Claim 12
Dependent Claim
29 words
The composition according to any one of the claims 1-10, wherein said B block is polymerized butadiene block having a 1,2 content of between 35 percent and 55 percent.
Claim 13
Dependent Claim
25 words
The composition according to any one of the claims 1-11, wherein said polymerized butadiene block has an average molecular weight of between 10,000 to 150,000.
References Cited (Backward Citations)
No citation records indexed.
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