Patent US4042750A successfully refreshed from Google Patents.
US4042750A
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Products and process for preparation of polyamides and shaped articles therefrom
Assignee: BP Corp North America Inc
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Filing: 1975-05-29
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Granted: 1977-08-16
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Expires: 1995-05-29
Abstract
Abstract Polyamides are prepared by reacting aromatic diacid with aromatic or aliphatic diamine in the molar ratio of about 1:0.5 to about 1:0.9 and then reacting this product with at least 0.1 to about 0.5 up to about 0.75 moles of an aromatic or an aliphatic diisocyanate. The products are useful as wire enamels, coatings, and molding resins as well as films, fibers, adhesives, and impregnating materials.
Inventors
- 👤 Robert B. Hanson
- 👤 James R. Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:33
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/303; H01B3/306; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/60; C08G18/603; C08G73/00; C08G73/06; C08G73/10; C08G73/14; H01B3/308; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/31504; Y10T428/31551; Y10T428/31554; Y10T428/31562; Y10T428/31605; Y10T428/31678; Y10T428/31681; Y10T428/31725
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
111 words
High molecular weight polyamide polymers having film-forming properties comprising the reaction product of an aromatic diacid of the formula ##STR4## where X is hydrogen, nitro, or an alkyl or alkenyl radical having about 6 or less carbon atoms, with a diamine in a mole ratio of about 1:0.5 to about 1:0.9 at a temperature of about 210° to about 250° C., to give a low molecular weight polymer having an excess of carboxylic acid moieties and then further condensing this polymer with about 0.1 up to about 0.75 moles of a diisocyanate for each diacid moiety in an inert solvent at a temperature of about 25° C. to about 150° C.
Claim 2
Dependent Claim
111 words
High molecular weight polyamide polymers having film-forming properties comprising the reaction product of an aromatic diacid of the formula ##STR4## where X is hydrogen, nitro, or an alkyl or alkenyl radical having about 6 or less carbon atoms, with a diamine in a mole ratio of about 1:0.5 to about 1:0.9 at a temperature of about 210° to about 250° C., to give a low molecular weight polymer having an excess of carboxylic acid moieties and then further condensing this polymer with about 0.1 up to about 0.75 moles of a diisocyanate for each diacid moiety in an inert solvent at a temperature of about 25° C. to about 150° C.
Claim 3
Dependent Claim
23 words
The product of claim 1 wherein up to about 40 mole per cent of the above aromatic diacids is replaced by terephthalic acid.
Claim 4
Dependent Claim
29 words
The product of claim 1 wherein up to about 40 mole percent of the above aromatic diacids is replaced by any of the position isomers of naphthalene dicarboxylic acid.
Claim 5
Dependent Claim
24 words
The product of claim 1 wherein up to about 40 mole per cent of the above aromatic diacids is replaced by 2,6-naphthalene dicarboxylic acid.
Claim 6
Dependent Claim
36 words
The product of claim 1 wherein the molar ratio of aromatic diacid to diamine is about 1:0.7 to about 1:09 and the mole ratio of the diacid to the diisocyanate is about 1:03 to about 1:0.1.
Claim 7
Dependent Claim
40 words
The product of claim 1 wherein the condensation of aromatic diacid with diamine is carried out at a temperature of about 220° to about 230° C. and the further condensation is carried out at about 130° to about 140° C.
Claim 8
Dependent Claim
12 words
The product of claim 1 wherein the aromatic diacid is isophthalic acid.
Claim 9
Dependent Claim
12 words
The product of claim 1 wherein the aromatic diacid is tertbutylisophthalic acid.
Claim 10
Dependent Claim
11 words
The product of claim 1 wherein the diamine is hexamethylene diamine.
Claim 11
Dependent Claim
11 words
The product of claim 1 wherein the diamine is methylenebis aniline.
Claim 12
Dependent Claim
11 words
The product of claim 1 wherein the diisocyanate is methylene di-p-phenyldiisocyanate.
Claim 13
Dependent Claim
113 words
A process for preparing high moluecular weight polyamide polymers having film forming properties which process comprises condensing an aromatic diacid of the formula ##STR5## where X is hydrogen, nitro, or an alkyl or alkenyl radical having about six or less carbon atoms, with a diamine in a mole ratio of about 1:0.5 to about 1:0.9 at a temperature of about 210° to about 250° C., to give a low molecular weight polymer having an excess of carboxylic acid moieties and then further condensing this polymer with about 0.1 up to about 0.75 moles of diisocyanate for each diacid moiety in an inert solvent at a temperature of about 25° to about 150° C.
Claim 14
Dependent Claim
113 words
A process for preparing high moluecular weight polyamide polymers having film forming properties which process comprises condensing an aromatic diacid of the formula ##STR5## where X is hydrogen, nitro, or an alkyl or alkenyl radical having about six or less carbon atoms, with a diamine in a mole ratio of about 1:0.5 to about 1:0.9 at a temperature of about 210° to about 250° C., to give a low molecular weight polymer having an excess of carboxylic acid moieties and then further condensing this polymer with about 0.1 up to about 0.75 moles of diisocyanate for each diacid moiety in an inert solvent at a temperature of about 25° to about 150° C.
Claim 15
Dependent Claim
46 words
The process of claiim 12 wherein the molar ratio of the aromatic diacid to the diamine is about 1 to 0.7 to about 1 to 0.9 and the mole ratio of the diacid to the diisocyanate is about 1 to 0.3 to about 1 to 0.1
Claim 16
Dependent Claim
46 words
The process of claiim 12 wherein the molar ratio of the aromatic diacid to the diamine is about 1 to 0.7 to about 1 to 0.9 and the mole ratio of the diacid to the diisocyanate is about 1 to 0.3 to about 1 to 0.1
Claim 17
Dependent Claim
40 words
The process of claim 12 wherein the condensation of aromatic diacid with diamine is carried out at a temperature of about 220° to about 230° C and the further condensation is carried out at about 130° to about 140° C.
Claim 18
Dependent Claim
12 words
The process of claim 12 wherein the aromatic diacid is isophthalic acid.
Claim 19
Dependent Claim
12 words
The process of claim 12 wherein the aromatic diacid is tertbutylisophthalic acid.
Claim 20
Dependent Claim
11 words
The process of claim 12 wherein the diamine is hexamethylene diamine.
Claim 21
Dependent Claim
11 words
A process according to claim 12 wherein the diamine is methylenebisaniline.
Claim 22
Dependent Claim
11 words
A process according to claim 12 wherein the diisocyanate is methylene-di-p-phenyldiisocyanate.
Claim 23
Dependent Claim
18 words
An electrical conductor having a continuous coating of the polyamide prepared according to the process of claim 12.
Claim 24
Dependent Claim
13 words
A film of the polyamide prepared according to the process of claim 12.
Claim 25
Dependent Claim
11 words
A protective coating prepared according to the process of claim 12.
Claim 26
Dependent Claim
14 words
A fiber prepared from the polyamide prepared according to the process of claim 12.
Claim 27
Dependent Claim
13 words
An adhesive of the polyamide prepared according to the process of claim 12.
Claim 28
Dependent Claim
20 words
A laminate having a plurality of layers bonded together with the polyamide prepared according to the process of claim 12.
Claim 29
Dependent Claim
10 words
A molded article prepared from the polyamide of claim 12.
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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) | 1980-08-15 | 1981-02-14 | 1981-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-15 | 1985-02-14 | 1985-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-15 | 1989-02-14 | 1989-08-16 | $7700.00 | Window Closed / Lapsed |