US3887758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil resistant leather
Assignee: Dow Silicones Corp
•
Filing: 1974-04-19
•
Granted: 1975-06-03
•
Expires: 1994-04-19
Abstract
Abstract Oil resistant leather articles are prepared by impregnating the leather with a room temperature curing organosilicon resin made by mixing (1) 1 to 65 percent by weight of a hydroxyl endblocked dimethylpolysiloxane, (2) from 15 to 70 percent by weight of a hydroxyl containing phenylsiloxane resin and (3) 5 to 65 percent by weight of a silane of the formula RSiX3 and thereafter allowing the mixture to cure. The leather is particularly useful for work shoes around areas where the shoes are exposed to solvents, oils or hydraulic fluids.
Inventors
- 👤 Anthony J Butler
- 👤 Daniel R Pail
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:23
CPC Classifications
C; C14; C14C; C14C9/00; Y; Y10; Y10T; Y10T428/00; Y10T428/4935
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
28 words
A METHOD OF PREPARING AN OIL RESISTANT LEATHER WHICH COMPRISES IMPREGNATING THE LEATHER WITH AN ORGANOSILICON RESIN CURABLE AT ROOM TEMPERATURE, SAID RESIN HAVING BEEN PREPARED BY MIXING
Claim 2
Independent Claim
28 words
A METHOD OF PREPARING AN OIL RESISTANT LEATHER WHICH COMPRISES IMPREGNATING THE LEATHER WITH AN ORGANOSILICON RESIN CURABLE AT ROOM TEMPERATURE, SAID RESIN HAVING BEEN PREPARED BY MIXING
Claim 3
Dependent Claim
36 words
FROM 1 TO 65 PERCENT BY WEIGHT OF A DIMETHYLPOLYSILOXANE CONTAINING SILICON-BONDED HYDROXYL GROUPS HAVING ON THE AVERAGE FROM 5 TO 50 SILOXANE UNITS PER MOLECULE WHICH CAN CONTAIN UP TO 10 MOL PERCENT MONOMETHYLSILOXANE UNITS.
Claim 4
Dependent Claim
36 words
FROM 1 TO 65 PERCENT BY WEIGHT OF A DIMETHYLPOLYSILOXANE CONTAINING SILICON-BONDED HYDROXYL GROUPS HAVING ON THE AVERAGE FROM 5 TO 50 SILOXANE UNITS PER MOLECULE WHICH CAN CONTAIN UP TO 10 MOL PERCENT MONOMETHYLSILOXANE UNITS.
Claim 5
Independent Claim
28 words
A method of preparing an oil resistant leather which comprises impregnating the leather with an organosilicon resin curable at room temperature, said resin having been prepared by mixing
Claim 6
Independent Claim
28 words
A method of preparing an oil resistant leather which comprises impregnating the leather with an organosilicon resin curable at room temperature, said resin having been prepared by mixing
Claim 7
Dependent Claim
36 words
from 1 to 65 percent by weight of a dimethylpolysiloxane containing silicon-bonded hydroxyl groups having on the average from 5 to 50 siloxane units per molecule which can contain up to 10 mol percent monomethylsiloxane units,
Claim 8
Dependent Claim
36 words
from 1 to 65 percent by weight of a dimethylpolysiloxane containing silicon-bonded hydroxyl groups having on the average from 5 to 50 siloxane units per molecule which can contain up to 10 mol percent monomethylsiloxane units,
Claim 9
Dependent Claim
48 words
from 15 to 70 percent by weight of a siloxane resin containing silicon-bonded hydroxyl groups having a phenyl-to-silicon ratio of at least 0.3, a hydrocarbon radical to silicon ratio of 1 to 1.5 in which the hydrocarbon radicals are of the group consisting of phenyl and methyl, and
Claim 10
Dependent Claim
48 words
from 15 to 70 percent by weight of a siloxane resin containing silicon-bonded hydroxyl groups having a phenyl-to-silicon ratio of at least 0.3, a hydrocarbon radical to silicon ratio of 1 to 1.5 in which the hydrocarbon radicals are of the group consisting of phenyl and methyl, and
Claim 11
Dependent Claim
46 words
FROM 15 TO 70 PERCENT OF A SILOXANE RESIN CONTAINING SILICON-BONDED HYDROXYL GROUPS HAVING A PHENYLTO-SILICON RATIO OF AT LEAST 0.3, A HYDROCARBON RADICAL TO SILICON RATIO OF 1 TO 1.5 IN WHICH THE HYDROCARBON RADICALS ARE OF THE GROUP CONSISTING OF PHENYL AND METHYL, AND
Claim 12
Dependent Claim
46 words
FROM 15 TO 70 PERCENT OF A SILOXANE RESIN CONTAINING SILICON-BONDED HYDROXYL GROUPS HAVING A PHENYLTO-SILICON RATIO OF AT LEAST 0.3, A HYDROCARBON RADICAL TO SILICON RATIO OF 1 TO 1.5 IN WHICH THE HYDROCARBON RADICALS ARE OF THE GROUP CONSISTING OF PHENYL AND METHYL, AND
Claim 13
Dependent Claim
10 words
A leather article prepared by the method of claim 1.
Claim 14
Dependent Claim
15 words
A leather article prepared by the method of claim 1 in which X is acetoxy.
Claim 15
Dependent Claim
54 words
FROM 5 TO 65 PERCENT BY WEIGHT OF A SILANE OF THE FORMULA RSIX3 IN WHICH X IS ACETOXY, LOWER ALKOXY, -ON=CR''2, -NR''2, -ONR''2 OR -NR''(O=CR'') IN WHICH R IS AN ALIPHATIC HYDROCARBON RADICAL OF 1 TO 2 CARBON ATOMS AND R'' IS A LOWER ALKYL RADICAL AND THEREAFTER ALLOWING THE RESIN TO CURE.
Claim 16
Dependent Claim
54 words
FROM 5 TO 65 PERCENT BY WEIGHT OF A SILANE OF THE FORMULA RSIX3 IN WHICH X IS ACETOXY, LOWER ALKOXY, -ON=CR''2, -NR''2, -ONR''2 OR -NR''(O=CR'') IN WHICH R IS AN ALIPHATIC HYDROCARBON RADICAL OF 1 TO 2 CARBON ATOMS AND R'' IS A LOWER ALKYL RADICAL AND THEREAFTER ALLOWING THE RESIN TO CURE.
Claim 17
Dependent Claim
56 words
from 5 to 65 percent by weight of a silane of the formula RSiX3 in wHich X is acetoxy, lower alkoxy, -ON CR''2, -NR''2, -ONR''2 or -NR''(O CR'') in which R is an aliphatic hydrocarbon radical of 1 to 2 carbon atoms and R'' is a lower alkyl radical and thereafter allowing the resin to cure.
Claim 18
Dependent Claim
56 words
from 5 to 65 percent by weight of a silane of the formula RSiX3 in wHich X is acetoxy, lower alkoxy, -ON CR''2, -NR''2, -ONR''2 or -NR''(O CR'') in which R is an aliphatic hydrocarbon radical of 1 to 2 carbon atoms and R'' is a lower alkyl radical and thereafter allowing the resin to cure.
Claim 19
Dependent Claim
16 words
A leather article prepared by the method of claim 1 in which X is -ON CCH3(C2H5).
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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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |