Patent US4477498A successfully refreshed from Google Patents.
US4477498A
Expired / Lapsed
US
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Process for the production of perfluoroalkyl residue containing condensation products, the condensation products prepared accordingly, and their use
Assignee: BASF Schweiz AG
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Filing: 1982-08-13
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Granted: 1984-10-16
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Expires: 2002-08-13
Abstract
Abstract The present invention relates to new condensation products of (A) 1 mole of a highly etherified hexamethylol melamine and (B) 3 to 6 moles of a thiol of the formula R.sub.f --X--SH, (1) Rf standing for perfluorinated alkyl with 4 to 14 C-atoms and X for divalent ethylene or isopropylene radicals, wherein the components (A) and (B) are reacted under increasing temperature up to at least 145° C. within a period of at least 40 minutes. In form of their aqueous dispersions, the condensation products are suitable for oil- and water-repellent finishing of fibrous, preferably textile materials.
Inventors
- 👤 Hans Deiner
- 👤 Franz Mosch
- 👤 Bernhard Sandner
- 👤 Willy Bernheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:58
CPC Classifications
C; C07; C07D; C07D251/00; C07D251/02; C07D251/12; C07D251/26; C07D251/40; C07D251/54; C07D251/70
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
86 words
A condensation product obtained by mixing (A) 1 mol of hexamethylolmelamine, highly etherified with a C 1 - to C 4 -alcohol, with (B) 3 to 6 moles of a thiol of the formula R f --X--SH, wherein R f is perfluoroalkyl of 4 to 14 carbon atoms and X is the divalent radical of ethylene or isopropylene, and allowing compounds (A) and (B) to react over a period of at least about 40 minutes while the reaction temperature is increased to at least 145° C.
Claim 2
Dependent Claim
86 words
A condensation product obtained by mixing (A) 1 mol of hexamethylolmelamine, highly etherified with a C 1 - to C 4 -alcohol, with (B) 3 to 6 moles of a thiol of the formula R f --X--SH, wherein R f is perfluoroalkyl of 4 to 14 carbon atoms and X is the divalent radical of ethylene or isopropylene, and allowing compounds (A) and (B) to react over a period of at least about 40 minutes while the reaction temperature is increased to at least 145° C.
Claim 3
Dependent Claim
45 words
The condensation product of claim 1, wherein the reaction is carried out by increasing the temperature within 15 to 45 minutes to a temperature of 95° to 130° C. and within a further 25 to 120 minutes to a temperature of 145° to 200° C.
Claim 4
Dependent Claim
23 words
The condensation product of claim 2, wherein the temperature of 145° to 200° C. is maintained for a further 2 to 6 hours.
Claim 5
Dependent Claim
21 words
The condensation product of claim 1, wherein compounds (A) and (B) are reacted in a mole ratio of 1:(4 to 5.5).
Claim 6
Dependent Claim
111 words
In a method of treating fibrous material by applying thereto an aqueous dispersion of a condensation product and curing at increased temperature, the improvement wherein the condensation product is obtained by mixing (A) 1 mol of hexamethylol melamine, highly etherified with a C 1 -C 4 -alcohol, with (B) 3 to 6 moles of a thiol of the formula R f --X--SH, wherein R f is perfluoroalkyl of 4 to 14 carbon atoms and X is the divalent radical of ethylene or isopropylene, and allowing compounds (A) and (B) to react over a period of at least about 40 minutes while the reaction temperature is increased to at least 145° C.
Claim 7
Dependent Claim
111 words
In a method of treating fibrous material by applying thereto an aqueous dispersion of a condensation product and curing at increased temperature, the improvement wherein the condensation product is obtained by mixing (A) 1 mol of hexamethylol melamine, highly etherified with a C 1 -C 4 -alcohol, with (B) 3 to 6 moles of a thiol of the formula R f --X--SH, wherein R f is perfluoroalkyl of 4 to 14 carbon atoms and X is the divalent radical of ethylene or isopropylene, and allowing compounds (A) and (B) to react over a period of at least about 40 minutes while the reaction temperature is increased to at least 145° C.
Claim 8
Dependent Claim
12 words
The method of claim 5, wherein the fibrous material is a textile.
Claim 9
Dependent Claim
19 words
The condensation product of claim 2, wherein the temperature of 145° to 200° C. is 160° to 180° C.
Claim 10
Dependent Claim
23 words
The condensation product of claim 7, wherein the temperature of 160° to 180° C. is maintained for a further 2 to 6 hours.
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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) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |