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US4064110A
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US
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Process for the production of autocrosslinkable polymers containing n-alkoxymethyl groups
Assignee: Bayer AG
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Filing: 1976-03-09
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Granted: 1977-12-20
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Expires: 1996-03-09
Abstract
Abstract Storable, autocrosslinkable polymers containing N-alkoxymethyl groups are obtained by reacting 5-alkoxymethyl-1,3,4-dioxazol-2-ones with a polymer having an average molecular weight above 600 and an average of more than one Zerewitinoff-active hydrogen atom in the molecule in the presence of a catalytic quantity of at least an alkali metal salt. The new catalysts allow to carry out the reaction at a temperature in the range from 50° to 110° C and guarantee a complete reaction of the reactants into uncrosslinked but autocrosslinkable light-stable end products.
Inventors
- 👤 Dieter Arlt
- 👤 Josef Bremen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:33
CPC Classifications
C; C08; C08G; C08G85/00; C08G85/004; C08F; C08F8/00; C08F8/30; C08G71/00; C08G71/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
92 words
In the process of producing a storable, autocrosslinkable product containing N-alkoxymethyl groups which is soluble in organic solvents by reacting 5-alkoxymethyl-1,3,4-dioxazol-2-one with a polymerization, polycondensation or polyaddition product having an average molecular weight above 600 and having an average of more than one Zerewitinoff-active hydrogen atom in the molecule at a temperature of from 50°-110° C with substantially complete elimination of carbon dioxide from the 5-alkoxymethyl-1,3,4-dioxazol-2-one, the improvement wherein the process is carried out in the presence of a catalytic amount of at least one alkali metal salt of a carboxylic acid.
Claim 2
Dependent Claim
92 words
In the process of producing a storable, autocrosslinkable product containing N-alkoxymethyl groups which is soluble in organic solvents by reacting 5-alkoxymethyl-1,3,4-dioxazol-2-one with a polymerization, polycondensation or polyaddition product having an average molecular weight above 600 and having an average of more than one Zerewitinoff-active hydrogen atom in the molecule at a temperature of from 50°-110° C with substantially complete elimination of carbon dioxide from the 5-alkoxymethyl-1,3,4-dioxazol-2-one, the improvement wherein the process is carried out in the presence of a catalytic amount of at least one alkali metal salt of a carboxylic acid.
Claim 3
Dependent Claim
106 words
The process of claim 1 wherein the alkali metal salt of the carboxylic acid is of the formula: ##STR4## wherein R is an aliphatic hydrocarbon radical having 1 to 22 carbon atoms, a saturated or monoolefinically unsaturated cycloaliphatic hydrocarbon radical having 5 to 20 carbon atoms or said radical substituted by alkyl having 1 to 4 carbon atoms or phenyl, an araliphatic hydrocarbon radical having 7 to 8 carbon atoms or an aromatic hydrocarbon radical having 6 to 10 carbon atoms or said radical substituted with alkyl having 1 to 4 carbon atoms; A is sodium, potassium, rubidium or caesium and n is 0 or 1.
Claim 4
Dependent Claim
9 words
The process of claim 2 wherein A is sodium.
Claim 5
Dependent Claim
25 words
The process of claim 2 wherein A is sodium, R is an aliphatic hydrocarbon radical having 2 to 12 carbon atoms and n is 0.
Claim 6
Dependent Claim
88 words
In the process of producing a storable, autocrosslinkable product containing N-alkoxymethyl groups which is soluble in organic solvents by reacting 5-alkoxymethyl-1,3,4-dioxazol-2-one with a polyester having an average molecular weight above 600 and having an average of more than one Zerewitinoff-active hydrogen atom in the molecule at a temperature of from 50-110° C with substantially complete elimination of carbon dioxide from the 5-alkoxymethyl-1,3,4-dioxazol-2-one, the improvement wherein the process is carried out in the presence of a catalytic amount of at least one alkali metal salt of a carboxylic acid.
Claim 7
Dependent Claim
88 words
In the process of producing a storable, autocrosslinkable product containing N-alkoxymethyl groups which is soluble in organic solvents by reacting 5-alkoxymethyl-1,3,4-dioxazol-2-one with a polyester having an average molecular weight above 600 and having an average of more than one Zerewitinoff-active hydrogen atom in the molecule at a temperature of from 50-110° C with substantially complete elimination of carbon dioxide from the 5-alkoxymethyl-1,3,4-dioxazol-2-one, the improvement wherein the process is carried out in the presence of a catalytic amount of at least one alkali metal salt of a carboxylic acid.
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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) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |