US4705824A
Expired / Lapsed
US
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Poly(5-imidazolone) and process therefor
Assignee: WR Grace and Co Conn
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Filing: 1986-02-14
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Granted: 1987-11-10
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Expires: 2006-02-14
Abstract
Abstract This invention relates to novel polymers, i.e., poly(5-imidazolones) and a process for preparing same from the reaction of a diazlactone with a primary diamine and thereafter dehydrating the resultant polyamide product. The polymers have good thermal properties and can be used as a composite matrix with a reinforcing agent such as fiber glass.
Inventors
- 👤 Shiow C. Lin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:09
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/0605; C08G73/0616
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
28 words
A poly(5-imidazolone) having recurring structural units selected from the formula group consisting of: ##STR9## wherein R 1 , R 2 and R 3 are each independent organic moieties.
Claim 2
Dependent Claim
28 words
A poly(5-imidazolone) having recurring structural units selected from the formula group consisting of: ##STR9## wherein R 1 , R 2 and R 3 are each independent organic moieties.
Claim 3
Dependent Claim
14 words
The poly(5-imidazolone) according to claim 1 having recurring structural units of the formula: ##STR10##
Claim 4
Dependent Claim
31 words
A poly(5-imidazolone) having recurring structural units selected from the formula group consisting of: ##STR11## wherein R 1 , R 2 , R 3 and R 4 are each independent organic moieties.
Claim 5
Dependent Claim
31 words
A poly(5-imidazolone) having recurring structural units selected from the formula group consisting of: ##STR11## wherein R 1 , R 2 , R 3 and R 4 are each independent organic moieties.
Claim 6
Dependent Claim
44 words
A composite comprising 1 to 70% by volume of a reinforcing agent with the balance being a poly(5-imidazolone) having recurring structural units selected from the formula group consisting of: ##STR12## wherein R 1 , R 2 and R 3 are each independent organic moieties.
Claim 7
Dependent Claim
44 words
A composite comprising 1 to 70% by volume of a reinforcing agent with the balance being a poly(5-imidazolone) having recurring structural units selected from the formula group consisting of: ##STR12## wherein R 1 , R 2 and R 3 are each independent organic moieties.
Claim 8
Dependent Claim
12 words
The composite of claim 4 wherein the reinforcing agent is fiber glass.
Claim 9
Dependent Claim
16 words
The composite of claim 4 wherein the poly(5-imidazolone) has recurring structural units of the formula: ##STR13##
Claim 10
Dependent Claim
65 words
A process of forming a poly(5-imidazolone) which comprises reacting an azlactone from the formula group consisting of: ##STR14## wherein R 1 and R 2 are independent organic moieties with a primary diamine at a temperature in the range of about 30°-200° C. to form a polyamide and thereafter dehydrating the thus formed polyamide at a temperature in the range 140°-130° C. to form the poly(5-imidazolone).
Claim 11
Dependent Claim
65 words
A process of forming a poly(5-imidazolone) which comprises reacting an azlactone from the formula group consisting of: ##STR14## wherein R 1 and R 2 are independent organic moieties with a primary diamine at a temperature in the range of about 30°-200° C. to form a polyamide and thereafter dehydrating the thus formed polyamide at a temperature in the range 140°-130° C. to form the poly(5-imidazolone).
Claim 12
Dependent Claim
22 words
The process of claim 7 wherein the reaction to form the polyamide is carried out in an organic solvent for the reactants.
Claim 13
Dependent Claim
24 words
The process of claim 7 wherein the reaction to form the polyamide is carried out at a temperature in the range of 50°-80° C.
Claim 14
Dependent Claim
68 words
A process of forming a poly(5-imidazolone) which comprises reacting an azlactone from the formula group consisting of: ##STR15## wherein R 1 , R 2 and R 4 are independent organic moieties with a primary diamine at a temperature in the range of about 30°-200° C. to form a polyamide and thereafter dehydrating the thus formed polyamide at a temperature in the range 140°-300° C. to form the poly(5-imidazolone).
Claim 15
Dependent Claim
68 words
A process of forming a poly(5-imidazolone) which comprises reacting an azlactone from the formula group consisting of: ##STR15## wherein R 1 , R 2 and R 4 are independent organic moieties with a primary diamine at a temperature in the range of about 30°-200° C. to form a polyamide and thereafter dehydrating the thus formed polyamide at a temperature in the range 140°-300° C. to form the poly(5-imidazolone).
Claim 16
Dependent Claim
22 words
The process of claim 10 wherein the reaction to form the polyamide is carried out in an organic solvent for the reactants.
References Cited (Backward Citations)
DE2433907A1
Cited
US4529793A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1990-11-09 | 1991-05-11 | 1991-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-09 | 1995-05-11 | 1995-11-10 | $3760.00 | Window Closed / Lapsed |
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