Patent US4283502A successfully refreshed from Google Patents.
US4283502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide resins
Assignee: EIDP Inc
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Filing: 1980-04-07
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Granted: 1981-08-11
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Expires: 2000-04-07
Abstract
Abstract A melt compounded blend of a nylon resin and a small amount of a finely divided adduct which contains a requisite amount of anhydride functionality. The adduct polymer is found to provide nucleating effects to the resultant blend.
Inventors
- 👤 Paul N. Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:08
CPC Classifications
C; C08; C08L; C08L77/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
139 words
A melt compounded blend consisting essentially of (a) a polyamide resin having a molecular weight of at least 5000, and (b) an adduct of maleic or fumaric anhydride and a copolymer of ethylene, at least one C 3 to C 6 α-olefin, and at least one nonconjugated diene, said adduct having an anhydride functionality of between about 0.1 and 4.0 milliequivalents of carboxyl groups per 1 gram of adduct, said adduct being present in the blend in an amount such that the anhydride functionality comprises between about 0.7 and 10 equivalents per 10 6 g of polyamide present; provided that the maximum amount of adduct present is less than 1 percent based on weight of polyamide and adduct; and provided that the adduct is in the form of finely divided particles having an average size less than 0.5 micron.
Claim 2
Dependent Claim
139 words
A melt compounded blend consisting essentially of (a) a polyamide resin having a molecular weight of at least 5000, and (b) an adduct of maleic or fumaric anhydride and a copolymer of ethylene, at least one C 3 to C 6 α-olefin, and at least one nonconjugated diene, said adduct having an anhydride functionality of between about 0.1 and 4.0 milliequivalents of carboxyl groups per 1 gram of adduct, said adduct being present in the blend in an amount such that the anhydride functionality comprises between about 0.7 and 10 equivalents per 10 6 g of polyamide present; provided that the maximum amount of adduct present is less than 1 percent based on weight of polyamide and adduct; and provided that the adduct is in the form of finely divided particles having an average size less than 0.5 micron.
Claim 3
Dependent Claim
76 words
The blend of claim 1 wherein the anhydride functionality in the adduct is between about 0.1 and 2 milliequivalents per gram and the adduct is present in an amount such that the amount of carboxyl groups available for anhydride functionality comprises between about 0.7 and 7 equivalents of carboxyl groups per 10 6 g of polyamide present, provided the maximum amount of adduct present is less than 1 percent based on weight of polyamide and adduct.
Claim 4
Dependent Claim
29 words
The blend of claim 2 wherein copolymer of the adduct is a copolymer of ethylene, propylene, and at least one linear aliphatic diene of at least 6 carbon atoms.
Claim 5
Dependent Claim
10 words
The blend of claim 3 wherein the diene is 1,4-hexadiene.
Claim 6
Dependent Claim
15 words
The blend of claims 3 or 4 wherein the adduct is derived from maleic acid.
Claim 7
Dependent Claim
15 words
The blend of claims 3 or 4 wherein the adduct is derived from fumaric acid.
Claim 8
Dependent Claim
23 words
Process for preparing the blend of claim 1 wherein components (a) and (b) of claim 1 are physically mixed and then melt extruded.
Claim 9
Dependent Claim
21 words
Process for molding a polyamide resin which comprises melt extruding the melt compounded blend defined in claim 1 into a mold.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-10 | 1985-02-09 | 1985-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-10 | 1989-02-09 | 1989-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-10 | 1993-02-09 | 1993-08-11 | $7700.00 | Window Closed / Lapsed |