US4171413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylic hydrazides
Assignee: PPG Industries Inc
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Filing: 1977-08-04
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Granted: 1979-10-16
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Expires: 1997-08-04
Abstract
Abstract Non-gelled acrylic-hydrazide resins are prepared by reacting hydrazine with a non-gelled acrylic polymer containing a functional group reactive with hydrazine to cause hydrazide formation.
Inventors
- 👤 Marvis E. Hartman
- 👤 Rostyslaw Dowbenko
- 👤 Thomas R. Hockswender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:58
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C08F2800/00; C08F2800/20
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
178 words
An acrylic polymer containing hydrazide groups comprising the reaction product of: (A) an addition polymer which does not contain an epoxy, nitrile or N-methylol group, formed by vinyl polymerization of 1 to 20 percent by weight of an alpha, beta-ethylenically unsaturated carboxylic acid and 80 to 99 percent by weight of at least one other vinyl monomer component at least a portion of which contains a functional group which is reactive with hydrazine to form hydrazide groups; the percentage by weight being based on total weight of alpha, beta-ethylenically unsaturated carboxylic acid and other vinyl monomer component, said addition polymer having at least 25 percent of its acid groups neutralized with an organic or inorganic base, said addition polymer being a solid in the absence of solvents, (B) 5 to 40 mole percent of hydrazine or an alkyl substituted hydrazine based on total moles of monomers used in preparing said addition polymer with the proviso that the moles of hydrazine or alkyl substituted hydrazine do not exceed the moles of monomers containing functional groups reactive with the hydrazine.
Claim 2
Dependent Claim
178 words
An acrylic polymer containing hydrazide groups comprising the reaction product of: (A) an addition polymer which does not contain an epoxy, nitrile or N-methylol group, formed by vinyl polymerization of 1 to 20 percent by weight of an alpha, beta-ethylenically unsaturated carboxylic acid and 80 to 99 percent by weight of at least one other vinyl monomer component at least a portion of which contains a functional group which is reactive with hydrazine to form hydrazide groups; the percentage by weight being based on total weight of alpha, beta-ethylenically unsaturated carboxylic acid and other vinyl monomer component, said addition polymer having at least 25 percent of its acid groups neutralized with an organic or inorganic base, said addition polymer being a solid in the absence of solvents, (B) 5 to 40 mole percent of hydrazine or an alkyl substituted hydrazine based on total moles of monomers used in preparing said addition polymer with the proviso that the moles of hydrazine or alkyl substituted hydrazine do not exceed the moles of monomers containing functional groups reactive with the hydrazine.
Claim 3
Dependent Claim
21 words
The acrylic polymer of claim 1 in which the carboxylic acid groups in the acrylic polymer are neutralized with an amine.
Claim 4
Dependent Claim
20 words
The acrylic polymer of claim 1 in which the alpha, beta-ethylenically unsaturated carboxylic acid is acrylic acid or methacrylic acid.
Claim 5
Dependent Claim
26 words
The acrylic polymer of claim 1 in which the functional group is an ester group, a carboxylic acid group, an anhydride group or an amide group.
Claim 6
Dependent Claim
26 words
The acrylic polymer of claim 1 wherein said monomer is an alkyl acrylate or methacrylate containing from 1 to 12 carbon atoms in the alkyl group.
Claim 7
Dependent Claim
32 words
The acrylic polymer of claim 5 wherein said vinyl monomer component contains a hydroxyalkyl ester of acrylic or methacrylic acid in which the alkyl group contains from 2 to 12 carbon atoms.
Claim 8
Dependent Claim
16 words
The acrylic polymer of claim 6 in which the hydroxyalkyl ester is hydroxyethyl acrylate or methacrylate.
Claim 9
Dependent Claim
17 words
The acrylic polymer of claim 1 wherein said vinyl monomer component contains an unsaturated carboxylic acid amide.
Claim 10
Dependent Claim
13 words
The acrylic polymer of claim 8 wherein said monomer is acrylamide or methacrylamide.
Claim 11
Dependent Claim
16 words
The acrylic polymer of claim 1 wherein said vinyl monomer component contains an N-alkoxy substituted amide.
Claim 12
Dependent Claim
15 words
The acrylic polymer of claim 10 wherein said vinyl monomer component contains N-(butoxymethyl)acrylamide or N-(butoxymethyl)methacrylamide.
Claim 13
Dependent Claim
17 words
The acrylic polymer of claim 1 wherein said vinyl monomer component contains a monoolefinic or diolefinic hydrocarbon.
Claim 14
Dependent Claim
16 words
The acrylic polymer of claim 12 wherein said vinyl monomer component contains styrene or vinyl toluene.
Claim 15
Dependent Claim
15 words
The acrylic polymer of claim 1 wherein said hydrazine is anhydrous hydrazine or hydrazine hydrate.
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) | 1982-10-15 | 1983-04-16 | 1983-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-15 | 1987-04-16 | 1987-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-15 | 1991-04-16 | 1991-10-16 | $7700.00 | Window Closed / Lapsed |