Patent US4073993A successfully refreshed from Google Patents.
US4073993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrophilic finishing process for hydrophobic fibers
Assignee: BP Corp North America Inc
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Filing: 1976-12-20
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Granted: 1978-02-14
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Expires: 1996-12-20
Abstract
Abstract A process of treating textiles and textile fibers with a partial ester having at least one retained acid group to impart a durable hydrophilic antistatic antisoiling finish which comprises the steps of (1) providing a water-soluble reaction product of a polyethylene glycol of an average molecular weight of 100 to 6000 and a polycarboxylic acid compound capable of forming a four to six membered cyclic acid anhydride ring, (2) coating, and (3) curing said reaction product on said textiles and textile fibers.
Inventors
- 👤 John C. Lark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:20
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/144; D06M13/148; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31736; Y10T428/31786; Y10T428/31794; Y10T442/00; Y10T442/20; Y10T442/2279; Y10T442/2295; Y10T442/2418; Y10T442/2434; Y10T442/2861; Y10T442/2893
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
203 words
A process for treating textiles and textile fibers with a partial ester having at least one retained unreacted acid group on the molecule after the esterification to impart a durable hydrophilic antistatic antisoiling finish which comprises the steps of (1) providing a water soluble reaction product consisting essentially of a polyethylene glycol of an average molecular weight of 100 to 6000 and an aromatic polycarboxylic acid compound selected from the group consisting of trimellitic anhydride, trimellitic acid, pyromellitic dianhydride, pyromellitic acid, phthalic anhydride and phthalic acid wherein the compound is capable of forming a four to six membered cyclic acid anhydride ring, wherein the mole ratios are within the range of 1:1 to 1:2, glycol to acid, the reaction temperature of said glycol and said acid being in the range of from about 130° to 175° C, the said partial esters being characterized by acid numbers within the range of 17 through 286 when said ester is a monoester and 4 through 95 when said ester is a diester, (2) coating, and (3) curing said reaction product on said textile and textile fibers, the said textiles being selected from the group of textiles and textile fibers consisting of polyesters, polyamides and polyester-polyamide blends.
Claim 2
Dependent Claim
203 words
A process for treating textiles and textile fibers with a partial ester having at least one retained unreacted acid group on the molecule after the esterification to impart a durable hydrophilic antistatic antisoiling finish which comprises the steps of (1) providing a water soluble reaction product consisting essentially of a polyethylene glycol of an average molecular weight of 100 to 6000 and an aromatic polycarboxylic acid compound selected from the group consisting of trimellitic anhydride, trimellitic acid, pyromellitic dianhydride, pyromellitic acid, phthalic anhydride and phthalic acid wherein the compound is capable of forming a four to six membered cyclic acid anhydride ring, wherein the mole ratios are within the range of 1:1 to 1:2, glycol to acid, the reaction temperature of said glycol and said acid being in the range of from about 130° to 175° C, the said partial esters being characterized by acid numbers within the range of 17 through 286 when said ester is a monoester and 4 through 95 when said ester is a diester, (2) coating, and (3) curing said reaction product on said textile and textile fibers, the said textiles being selected from the group of textiles and textile fibers consisting of polyesters, polyamides and polyester-polyamide blends.
Claim 3
Dependent Claim
15 words
The process of claim 1 wherein said acid compounds comprise trimellitic anhydride and trimellitic acid.
Claim 4
Dependent Claim
15 words
The process of claim 1 wherein said acid compounds comprise pyromellitic dianhydride and pyromellitic acid.
Claim 5
Dependent Claim
15 words
The process of claim 1 wherein said acid compounds comprise phthalic anhydride and phthalic acid.
Claim 6
Dependent Claim
13 words
The process of claim 1 wherein said textiles and textile fibers comprise polyesters.
Claim 7
Dependent Claim
13 words
The process of claim 1 wherein said textiles and textile fibers comprise polyamides.
Claim 8
Dependent Claim
15 words
The process of claim 1 wherein said textiles and textile fibers comprise a polyamide-polyester blend.
Claim 9
Dependent Claim
188 words
An article comprising textile fibers and textiles carrying a hydrophilic, antistatic antisoiling finish wherein said finish comprises the application of a partial ester, having at least one retained unreacted acid group, consisting essentially of a polyethylene glycol of an average molecular weight of 100 to 6000 and an aromatic polycarboxylic acid compound selected from the group consisting of trimellitic anhydride, trimellitic acid, pyromellitic dianhydride, pyromellitic acid, phthalic anhydride and phthalic acid having two to four carboxyl groups bonded directly to the aromatic moiety wherein the compound is capable of forming a four to six membered cyclic anhydride ring, wherein the mole ratios are within the range of 1:1 to 1:2, glycol to acid, the reaction temperature of said glycol and said acid being in the range of from about 130° to 175° C, the said partial esters being characterized by acid numbers within the range of 17 through 286 when said ester is a monoester and 4 through 95 when said ester is a diester, the said textile and textile fibers being selected from the group of textiles and textile fibers consisting of polyesters, polyamides, and polyester-polyamide blends.
Claim 10
Dependent Claim
188 words
An article comprising textile fibers and textiles carrying a hydrophilic, antistatic antisoiling finish wherein said finish comprises the application of a partial ester, having at least one retained unreacted acid group, consisting essentially of a polyethylene glycol of an average molecular weight of 100 to 6000 and an aromatic polycarboxylic acid compound selected from the group consisting of trimellitic anhydride, trimellitic acid, pyromellitic dianhydride, pyromellitic acid, phthalic anhydride and phthalic acid having two to four carboxyl groups bonded directly to the aromatic moiety wherein the compound is capable of forming a four to six membered cyclic anhydride ring, wherein the mole ratios are within the range of 1:1 to 1:2, glycol to acid, the reaction temperature of said glycol and said acid being in the range of from about 130° to 175° C, the said partial esters being characterized by acid numbers within the range of 17 through 286 when said ester is a monoester and 4 through 95 when said ester is a diester, the said textile and textile fibers being selected from the group of textiles and textile fibers consisting of polyesters, polyamides, and polyester-polyamide blends.
Claim 11
Dependent Claim
13 words
The article of claim 8 wherein said textile fibers and textiles comprise polyesters.
Claim 12
Dependent Claim
13 words
The article of claim 8 wherein said textile fibers and textiles comprise polyamides.
Claim 13
Dependent Claim
15 words
The article of claim 8 wherein said textile fibers and textiles comprise a polyamide-polyester blend.
Claim 14
Dependent Claim
15 words
The article of claim 8 wherein said acid compounds comprise trimellitic anhydride and trimellitic acid.
Claim 15
Dependent Claim
15 words
The article of claim 8 wherein said acid compounds comprise pyromellitic dianhydride and pyromellitic acid.
Claim 16
Dependent Claim
15 words
The article of claim 8 wherein said acid compounds comprise phthalic anhydride and phthalic acid.
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) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |