Patent US4612353A successfully refreshed from Google Patents.
US4612353A
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Polyamide/polyetherimide alloys
Assignee: Dow Chemical Co
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Filing: 1985-04-22
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Granted: 1986-09-16
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Expires: 2005-04-22
Abstract
Abstract Blends are provided comprising (a) from about 25 to about 75 percent by weight of a particular aromatic-aliphatic polyamide and (b) complementally 75 to 25 percent by weight of a particular polyetherimide.
Inventors
- 👤 Philip S. Andrews
- 👤 Kemal Onder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:47
CPC Classifications
C; C08; C08L; C08L77/00; C08L79/00; C08L79/04; C08L79/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
155 words
A polymer blend which comprises (a) from about 25 to about 75 percent by weight of a polyamide characterized by a recurring unit of the formula: ##STR2## wherein Ar represents arylene and, in about 30 to about 85 percent of the recurring units, R represents alkylene from 6 to 12 carbon atoms, inclusive, and in about 15 percent to about 70 percent of the recurring units R represents m-phenylene; and (b) from about 75 to about 25 percent by weight of a polyetherimide characterized by a recurring unit of the formula: ##STR3## wherein Q 1 is a divalent radical selected from the group consisting of ##STR4## wherein each R 1 is independently selected from hydrogen or methyl, each X is independently selected from hydrogen or halogen, and R 2 is a straight-chain or branched alkylene containing 1 to 5 carbon atoms; and Q 2 is a divalent radical selected from the group consisting of ##STR5##
Claim 2
Dependent Claim
155 words
A polymer blend which comprises (a) from about 25 to about 75 percent by weight of a polyamide characterized by a recurring unit of the formula: ##STR2## wherein Ar represents arylene and, in about 30 to about 85 percent of the recurring units, R represents alkylene from 6 to 12 carbon atoms, inclusive, and in about 15 percent to about 70 percent of the recurring units R represents m-phenylene; and (b) from about 75 to about 25 percent by weight of a polyetherimide characterized by a recurring unit of the formula: ##STR3## wherein Q 1 is a divalent radical selected from the group consisting of ##STR4## wherein each R 1 is independently selected from hydrogen or methyl, each X is independently selected from hydrogen or halogen, and R 2 is a straight-chain or branched alkylene containing 1 to 5 carbon atoms; and Q 2 is a divalent radical selected from the group consisting of ##STR5##
Claim 3
Dependent Claim
43 words
A polymer blend according to claim 1 wherein Q 1 and Q 2 in said polyetherimide represent ##STR6## wherein each X is independently selected from hydrogen or halogen and R 2 is a straight-chain or branched alkylene containing 1 to 5 carbon atoms.
Claim 4
Dependent Claim
15 words
A polymer blend according to claim 1 wherein said polyetherimide has the recurring unit ##STR7##
Claim 5
Dependent Claim
50 words
A polymer blend according to claim 1 wherein said polyamide is characterized in that in about 60 to about 85 percent of the recurring units, R represents alkylene from 7 to 12 carbon atoms, inclusive, and in the remainder of said recurring units, R is m-phenylene, and Ar represents 4,4'-methylenebis(phenylene).
Claim 6
Dependent Claim
70 words
A polymer blend according to claim 1 wherein said polyamide is characterized in that in about 30 to about 60 percent of the recurring units, R represents alkylene from 7 to 12 carbon atoms, inclusive, in the remainder of said recurring units R is m-phenylene, in about 70 to about 95 percent of said recurring units Ar represents 4,4'-methylenebis(phenylene) and in the remainder of said recurring units Ar is tolylene.
Claim 7
Dependent Claim
14 words
A polymer blend according to claim 1 wherein R in said polyamide is heptylene.
Claim 8
Dependent Claim
32 words
A polymer blend according to claim 1 wherein said (a) is about 35 to about 65 percent by weight of the blend and (b) is accordingly 65 to 35 percent by weight.
Claim 9
Dependent Claim
105 words
A polymer blend which comprises (a) from about 25 to about 75 percent by weight of a polyamide characterized by a recurring unit of the formula: ##STR8## wherein R in about 30 to about 60 percent of the recurring units is heptylene and in the remainder of the recurring units R represents m-phenylene and Ar in about 70 to about 95 percent of the recurring units is 4,4'-methylenebis(phenylene) and in the remaining 5 to 30 percent of the recurring units is tolylene; and (b) from about 75 to about 25 percent by weight of a polyetherimide characterized by a recurring unit of the formula ##STR9##
Claim 10
Dependent Claim
105 words
A polymer blend which comprises (a) from about 25 to about 75 percent by weight of a polyamide characterized by a recurring unit of the formula: ##STR8## wherein R in about 30 to about 60 percent of the recurring units is heptylene and in the remainder of the recurring units R represents m-phenylene and Ar in about 70 to about 95 percent of the recurring units is 4,4'-methylenebis(phenylene) and in the remaining 5 to 30 percent of the recurring units is tolylene; and (b) from about 75 to about 25 percent by weight of a polyetherimide characterized by a recurring unit of the formula ##STR9##
Claim 11
Dependent Claim
63 words
A polymer blend according to claim 8 wherein R in 50 percent of said recurring units is heptylene and in the remaining 50 percent is m-phenylene, and, in about 85 percent of said recurring units, Ar is 4,4'-methylenebis(phenylene) and in the remaining 15 percent is tolylene and those recurring units in which Ar is tolylene are also those in which R is m-phenylene.
Claim 12
Dependent Claim
21 words
A polymer blend according to claim 9 wherein said polyamide and said polyetherimide are 75 and 25 percent by weight respectively.
Claim 13
Dependent Claim
21 words
A polymer blend according to claim 9 wherein said polyamide and said polyetherimide are 50 and 50 percent by weight respectively.
Claim 14
Dependent Claim
21 words
A polymer blend according to claim 9 wherein said polyamide and said polyetherimide are 25 and 75 percent by weight respectively.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1989-09-15 | 1990-03-17 | 1990-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-15 | 1994-03-17 | 1994-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-15 | 1998-03-17 | 1998-09-16 | $7700.00 | Window Closed / Lapsed |