US4488878A
Expired / Lapsed
US
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Process to produce durable press low formaldehyde release cellulosic textiles
Assignee: United States Department of Agriculture
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Filing: 1984-03-06
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Granted: 1984-12-18
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Expires: 2004-03-06
Abstract
Abstract Hydroxymethylated organic carbamates are reacted with water soluble alcohols to produce etherified hydroxymethylated carbamates which are used with an acid catalyst to treat cellulosic textiles for sufficient time and temperature to produce a durable press low formaldehyde release cellulosic textile. Carbamates from the group consisting of alkyl or alkoxyalkyl carbamates of less than six carbons can be used. Water soluble aliphatic monohydric and polyhydric alcohols of one to six carbons are also satisfactory. The hydroxymethylated carbamate is reacted with the alcohol at about 10 DEG C. to 100 DEG C. about 0.5 to 16 hours at a pH from about 1 to 6. Concentrations of acid catalyst range from 0.5 to 3.0% of the solution. Curing temperatures range from about 120 DEG C. to 160 DEG C. for about 0.5 to 10 minutes.
Inventors
- 👤 Bethlehem K. Andrews
- 👤 Robert M. Reinhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:11
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/564; D06M15/568
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
57 words
A process for producing durable press low formaldehyde release cellulosic textiles comprising: reacting hydroxymethylated organic carbamates with water soluble alcohols to produce etherified hydroxymethylated carbamates and then treating a cellulosic textile with the etherified hydroxymethylated carbamates and an acid catalyst for sufficient time and at sufficient temperature to produce a durable press low formaldehyde release cellulosic textiles.
Claim 2
Dependent Claim
57 words
A process for producing durable press low formaldehyde release cellulosic textiles comprising: reacting hydroxymethylated organic carbamates with water soluble alcohols to produce etherified hydroxymethylated carbamates and then treating a cellulosic textile with the etherified hydroxymethylated carbamates and an acid catalyst for sufficient time and at sufficient temperature to produce a durable press low formaldehyde release cellulosic textiles.
Claim 3
Dependent Claim
24 words
The process of claim 1 wherein the carbamate is selected from the group consisting of alkyl or alkoxyalkyl carbamates of less than six carbons.
Claim 4
Dependent Claim
27 words
The process of claim 1 wherein the alcohol is selected from the group consisting of water soluble aliphatic monohydric and polyhydric alcohols of one to six carbons.
Claim 5
Dependent Claim
34 words
The process of claim 1 wherein the carbamate is reacted with the alcohol at about 10° C. to 100° C. for about 0.5 to 6 hours at a pH from about 1 to 6.
Claim 6
Dependent Claim
23 words
The process of claim 1 wherein the concentration of the acid catalyst is by weight about from 0.5 to 3% of the solution.
Claim 7
Dependent Claim
25 words
The process of claim 1 wherein the etherified hydroxymethylated carbamate is applied to the cellulosic textile at a pickup of about from 1 to 20%.
Claim 8
Dependent Claim
30 words
The process of claim 1 wherein the treated cellulosic textile is cured at a temperature of from about 120° C. to 160° C. for about from 0.5 to 10 minutes.
Claim 9
Dependent Claim
24 words
The process of claim 2 wherein the carbamate is selected from the group consisting of: methyl bis(hydroxymethyl)carbamate, isopropyl bis(hydroxymethyl)carbamate, isobutyl bis(hydroxymethyl)carbamate, and methoxyethyl bis(hydroxymethyl)carbamate.
Claim 10
Dependent Claim
30 words
The process of claim 3 wherein the alcohol is selected from the group consisting of: methyl alcohol, ethyl alcohol, isopropyl alcohol, ethylene glycol, diethylene glycol, 1,2-propylene glycol, glycerol, and sorbitol.
Claim 11
Dependent Claim
17 words
A durable press low formaldehyde release cellulosic textile produced in accordance with the process of claim 1.
Claim 12
Dependent Claim
102 words
An improved process to produce a low formaldehyde release durable press cellulosic textile of the type wherein the textile is treated with a hydroxymethylated carbamate, said improvement comprising: treating a cellulosic textile with an etherified carbamate agent resulting from reaction of a hydroxymethylated carbamate selected from the group consisting of an alkyl or alkoxyalkyl carbamates of less than six carbons with an alcohol selected from the group consisting of water soluble aliphatic monohydric and polyhydric alcohols of one to six carbons and an acidic catalyst for sufficient time and at sufficient temperature to produce a low formaldehyde release durable press cellulosic textile.
Claim 13
Dependent Claim
102 words
An improved process to produce a low formaldehyde release durable press cellulosic textile of the type wherein the textile is treated with a hydroxymethylated carbamate, said improvement comprising: treating a cellulosic textile with an etherified carbamate agent resulting from reaction of a hydroxymethylated carbamate selected from the group consisting of an alkyl or alkoxyalkyl carbamates of less than six carbons with an alcohol selected from the group consisting of water soluble aliphatic monohydric and polyhydric alcohols of one to six carbons and an acidic catalyst for sufficient time and at sufficient temperature to produce a low formaldehyde release durable press cellulosic textile.
Claim 14
Dependent Claim
18 words
The improved durable press low formaldehyde release cellulosic textile produced in accordance with the process of claim 11.
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) | 1987-12-18 | 1988-06-18 | 1988-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-18 | 1992-06-18 | 1992-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-18 | 1996-06-18 | 1996-12-18 | $7700.00 | Window Closed / Lapsed |