Patent US4258154A successfully refreshed from Google Patents.
US4258154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic polyester
Assignee: Unitika Ltd
•
Filing: 1979-06-15
•
Granted: 1981-03-24
•
Expires: 1999-06-15
Abstract
Abstract A resin composition consisting essentially of (A) an aromatic polyester-polycarboxylic anhydride and (B) a polyamide. An article molded from the resin composition exhibits high heat resistance, mechanical properties and moldability. It is particularly resistant to cracking upon impact and is also resistant to breaking at a thin-walled portion.
Inventors
- 👤 Kayomon Kyo
- 👤 Nakaba Asahara
- 👤 Yasuhiko Asai
- 👤 Isamu Hirose
- 👤 Sadao Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:02
CPC Classifications
C; C08; C08G; C08G67/00; C08G67/04; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/19; C08L; C08L67/00; C08L67/02; C08L67/03
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
147 words
A resin composition consisting essentially of: (A) an aromatic polyester-polycarboxylic anhydride prepared from a diphenol, a functional derivative thereof, or a mixture thereof, and an aromatic dicarboxylic acid, a functional derivative thereof, or a mixture thereof, the proportion of the acid anhydride linkage which forms an integral part of the polymeric chain being about 0.2 to about 50% based on the total number of ester linkages and f acid anhydride linkages and (B) a polyamide containing therein a repeating unit of the following formula (IV): ##STR14## wherein R 5 is an alkylene group having 4 to 11 carbon atoms; R 6 is an alkylene group having 4 to 11 carbon atoms or ##STR15## R 7 is an alkylene group having 4 to 11 carbon atoms, ##STR16## R 7 being an alkylene group when R 6 is ##STR17## and n is an integer of from 30 to 500.
Claim 2
Dependent Claim
147 words
A resin composition consisting essentially of: (A) an aromatic polyester-polycarboxylic anhydride prepared from a diphenol, a functional derivative thereof, or a mixture thereof, and an aromatic dicarboxylic acid, a functional derivative thereof, or a mixture thereof, the proportion of the acid anhydride linkage which forms an integral part of the polymeric chain being about 0.2 to about 50% based on the total number of ester linkages and f acid anhydride linkages and (B) a polyamide containing therein a repeating unit of the following formula (IV): ##STR14## wherein R 5 is an alkylene group having 4 to 11 carbon atoms; R 6 is an alkylene group having 4 to 11 carbon atoms or ##STR15## R 7 is an alkylene group having 4 to 11 carbon atoms, ##STR16## R 7 being an alkylene group when R 6 is ##STR17## and n is an integer of from 30 to 500.
Claim 3
Dependent Claim
164 words
The resin composition according to claim 1, wherein the diphenol is represented by the formula (I): ##STR18## wherein --X-- is selected from the group consisting of --O--, --S--, --SO 2 --, --SO--, --CO--, and an alkylene group containing 1 to 5 carbon atoms, and R 1 , R 2 , R 3 , R 4 , R 1 ', R 2 ', R 3 ' and R 4 ', which may be the same or different, each is selected from the group consisting of a hydrogen atom, a chlorine atom, a bromine atom and an alkyl group containing 1 to 5 carbon atoms, or the formula (II): HO--Ar.sub.1 --OH (II) wherein Ar 1 is ##STR19## an arylene group Ar 1 may be substituted by an alkyl group having 1 to 5 carbon atoms, or a chlorine or a bromine atom; the number of substituents being in the range of from zero to the number of hydrogen atoms by which Ar 1 can be substituted.
Claim 4
Dependent Claim
75 words
The resin composition according to claim 1, wherein the aromatic dicarboxylic acid is represented by the formula (III): HOOC--Ar.sub.2 --COOH (III) wherein Ar 2 is ##STR20## the arylene group Ar 2 may be substituted by an alkyl group having 1 to 5 carbon atoms, or a chlorine or a bromine atom; the number of substituents being in the range of from zero to the number of hydrogen atoms by which Ar 2 can be substituted.
Claim 5
Dependent Claim
34 words
The resin composition according to claim 1, wherein the aromatic dicarboxylic acid and/or a derivative thereof is a mixture of a terephthalic acid or a derivative thereof, and isophthalic acid or a derivative thereof.
Claim 6
Dependent Claim
36 words
The resin composition according to claim 4, wherein the terephthalic acid or a derivative thereof is mixed with the isophthalic acid or a derivative thereof at a molar ratio of from about 9:1 to about 1:9.
Claim 7
Dependent Claim
34 words
The resin composition according to claim 4, wherein the terephthalic acid or a derivative thereof is mixed with the isophthalic acid or a derivative thereof at a molar ratio of from 7:3 to 3:7.
Claim 8
Dependent Claim
31 words
The resin composition according to claim 4, wherein the terephthalic acid or a derivative thereof is mixed with the isophthalic acid or a derivative thereof at a molar ratio of 5:5.
Claim 9
Dependent Claim
46 words
The resin composition according to claim 1, wherein said diphenol or a derivative thereof is 2,2-bis(4-hydroxyphenyl)propane or a derivative thereof and said aromatic dicarboxylic acid or a derivative thereof is a mixture of terephthalic acid or a derivative thereof and isophthalic acid or a derivative thereof.
Claim 10
Dependent Claim
14 words
The resin composition according to claim 1, wherein said polyamide is polycaprolactam or polyhexamethylenediamine.
Claim 11
Dependent Claim
26 words
The resin composition according to claim 1, wherein the proportion by weight of the component (A) to component (B) ranges from about 1:9 to about 9:1.
Claim 12
Dependent Claim
24 words
The resin composition according to claim 1, wherein the proportion by weight of the component (A) to component (B) ranges from 3:7 to 7:3.
Claim 13
Dependent Claim
22 words
The resin composition according to claim 1, wherein the component (A) contains from about 0.5 to about 20% of acid anhydride linkages.
Claim 14
Dependent Claim
20 words
The resin composition according to claim 1, wherein the component (A) contains from 1 to 10% of acid anhydride linkages.
Claim 15
Dependent Claim
51 words
The resin composition according to claim 1, which contains more than about 50% by weight of the component (B) and comprises islands of the component (A) being dispersed in a sea of the component (B) in substantially spherical particles having an average size of from about 0.2 to about 2 microns.
Claim 16
Dependent Claim
45 words
The resin composition according to claim 1, which has been mixed in a molten state at a temperature in the range of from about 180° to about 340° C. and for a period in the range of from about 1 second to about 60 minutes.
Claim 17
Dependent Claim
13 words
The resin composition according to claim 1, which additionally comprises a polymeric material.
Claim 18
Dependent Claim
12 words
The resin composition according to claim 16, which additionally comprises a rubber.
Claim 19
Dependent Claim
11 words
A molded article produced from the resin composition of claim 1.
Claim 20
Dependent Claim
19 words
The resin composition of claim 1, wherein said composition possesses a logarithmic viscosity number of about 0.3 to 1.5.
Claim 21
Dependent Claim
23 words
The resin composition of claim 1 prepared by initially reacting an excess amount of aromatic dicarboxylic acid or derivative thereof with the diphenol.
Claim 22
Dependent Claim
45 words
The resin composition of claim 1 prepared by a two-stage reaction, in the first stage of which an excess amount of aromatic dicarboxylic acid or derivative thereof is reacted with diphenol, and in the second stage of which the balance of the diphenol is reacted.
Claim 23
Dependent Claim
50 words
The resin composition of claim 21, where in the first stage the molar ratio of aromatic dicarboxylic acid or derivative thereof to diphenol is about 1:0.1 to 1:0.98 and in the second stage the molar ratio of aromatic dicarboxylic acid or derivative thereof to diphenol is about 1:1 to 1:1.5.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |