US4061845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of hydrazides and certain unsaturated esters
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1976-11-04
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Granted: 1977-12-06
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Expires: 1996-11-04
Abstract
Abstract Novel products can be prepared by reaction of monohydrazides and/or polyhydrazides, in particular dihydrazides, with mono-, di- or, poly-acrylyl compounds. The reactants can be chosen such that the resulting polymers are strictly linear as in the case of reaction of a monohydrazide with a diacrylyl compound as follows: ##STR1## WHEREIN EACH (O) is a carbonyl oxygen, n is a positive integer, each R is hydrogen or a monovalent group, and each Q is an organic group, R and Q being free of functions which would interfere with the desired reaction at 80° C. Various degrees of crosslinking can be achieved by reacting monohydrazides with components containing an average of more than two acrylate double bonds per molecule or by reacting di-hydrazides with di- or poly-acrylyl compounds. Fumaric, maleic and itaconic esters and acid esters add to hydrazides in a similar fashion as acrylates, the aliphatic double bond being similarly activated by the carbonyl group. However, methacrylates are totally inert to hydrazide at 80° C. These reaction products or polymers are useful as exterior or protective and decorative coating materials for bonderized steel and the like. Their impact resistance can be improved by reaction with toughening agents.
Inventors
- 👤 Hubert J. Fabris
- 👤 David P. Gruber
- 👤 David R. Sponseller
- 👤 Heinz Uelzmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:16
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/08; C08G63/00; C08G63/68; C08G63/685; C08G63/6854
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
143 words
A reactive composition useful in forming polymeric coatings and adhesives and comprising a copolymer of: a. a hydrazide having the formula R (C(0)--NH--NHR') a where a is a number from 1 to 10, each (O) is a carbonyl oxygen atoms, R is selected from the group consisting of --R', --OR', --NR' 2 , --NHNHR', --C(O)NHNHR' and polyvalent organic radicals having molecular weights of from 14 to 15,000, and each R' is a hydrogen atom or a monovalent organic radical having a molecular weight of from 14 to 450 and being free of functions which react with methyl acrylate at 80° C., and b. an unsaturated organic ester having from 1 to 5 aliphatic double bonds activated by a carbonyl group, the average number of said carbonyl-activated double bonds being greater than one, and having a molecular weight of from about 71 to 12,000.
Claim 2
Dependent Claim
143 words
A reactive composition useful in forming polymeric coatings and adhesives and comprising a copolymer of: a. a hydrazide having the formula R (C(0)--NH--NHR') a where a is a number from 1 to 10, each (O) is a carbonyl oxygen atoms, R is selected from the group consisting of --R', --OR', --NR' 2 , --NHNHR', --C(O)NHNHR' and polyvalent organic radicals having molecular weights of from 14 to 15,000, and each R' is a hydrogen atom or a monovalent organic radical having a molecular weight of from 14 to 450 and being free of functions which react with methyl acrylate at 80° C., and b. an unsaturated organic ester having from 1 to 5 aliphatic double bonds activated by a carbonyl group, the average number of said carbonyl-activated double bonds being greater than one, and having a molecular weight of from about 71 to 12,000.
Claim 3
Dependent Claim
43 words
A reactive composition according to claim 1 wherein a is no greater than 2, component (b) is selected from the group consisting of acrylates, fumarates, maleates and itaconates, and the average number of said carbonyl-activated double bonds in (b) is at least two.
Claim 4
Dependent Claim
16 words
A reactive composition according to claim 2 wherein said hydrazide has the formula R(C(O)--NH--NH 2 ).sbsb.a.
Claim 5
Dependent Claim
66 words
A reactive composition according to claim 3 wherein (b) is an acrylyl compound and from about 5 to 50% by weight of said acrylyl compound has an equivalent weight of at least about 300 per carbonyl-activated aliphatic double bond and where from about 95 to 50% by weight of said acrylyl compound has an equivalent weight of less than about 300 per carbonyl-activated aliphatic double bond.
Claim 6
Dependent Claim
11 words
A reactive composition according to claim 1 dispersed in a dispersant.
Claim 7
Dependent Claim
128 words
A copolymer of: a. a hydrazide having the formula R(C(O)--NH--NHR') a where a is a number from 1 to 10, each (O) is a carbonyl oxygen atom, R is selected from the group consisting of --R', --OR', --NR', --NHNHR', --C(O)NHNHR', and polyvalent organic radicals having molecular weights of from 14 to 15,000, and each R' is a hydrogen atom or a monovalent organic radical having a molecular weight of from 14 to 450 and being free of functions which react with methyl acrylate at 80° C., and b. an unsaturated oranic ester having from 1 to 5 aliphatic double bonds activated by a carbonyl group, the average number of said carbonyl-activated double bonds being greater than one, and having a molecular weight of from about 71 to 12,000.
Claim 8
Dependent Claim
128 words
A copolymer of: a. a hydrazide having the formula R(C(O)--NH--NHR') a where a is a number from 1 to 10, each (O) is a carbonyl oxygen atom, R is selected from the group consisting of --R', --OR', --NR', --NHNHR', --C(O)NHNHR', and polyvalent organic radicals having molecular weights of from 14 to 15,000, and each R' is a hydrogen atom or a monovalent organic radical having a molecular weight of from 14 to 450 and being free of functions which react with methyl acrylate at 80° C., and b. an unsaturated oranic ester having from 1 to 5 aliphatic double bonds activated by a carbonyl group, the average number of said carbonyl-activated double bonds being greater than one, and having a molecular weight of from about 71 to 12,000.
Claim 9
Dependent Claim
42 words
A copolymer according to claim 6 wherein a is no greater than 2, component (b) is selected from the group consisting of acrylates, fumarates, maleates and itaconates, and the average number of said carbonyl-activated double bonds in (b) is at least two.
Claim 10
Dependent Claim
15 words
A copolymer according to claim 7 wherein said hydrazide has the formula R(C(O)--NH--NH 2 ).sbsb.a.
Claim 11
Dependent Claim
66 words
A copolymer according to claim 8 wherein (b) is an acrylyl compound and from about 5 to 50% by weight of said acrylyl compound has an equivalent weight of at least about 300 per carbonyl-activated aliphatic double bond and where from about 95 to 50% by by weight of said acrylyl compound has an equivalent weight of less than about 300 per carbonyl-activated aliphatic double bond.
Claim 12
Dependent Claim
10 words
A copolymer according to claim 6 dispersed in a dispersant.
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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) | 1980-12-05 | 1981-06-06 | 1981-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-05 | 1985-06-06 | 1985-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-05 | 1989-06-06 | 1989-12-06 | $7700.00 | Window Closed / Lapsed |