Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1996-09-13
1998-05-19
Lipman, Bernard
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
5253299, 5253305, 5253336, 5253337, 525374, 525375, 525376, 525383, 525419, 525420, 525437, C08F 830
Patent
active
057537542
ABSTRACT:
The present invention provides a method of modifying the surface of a polymeric substrate, e.g., to improve the wettability of the polymer film surface and/or alter the reactivity of the surface of the substrate by further oxidation or affixation of nitrogen, comprising exposing the substrate to a flame. The flame is supported by a fuel and oxidizer mixture that includes an effective amount, for modifying the polymeric substrate, of at least one compound that functions as a fuel or oxidizer substitute and is selected from an oxygen-containing compound, in which the oxygen comprises between about 10 and 50 atomic percent of the compound, a nitrogen-containing compound or an oxygen-nitrogen-containing compound. In a preferred embodiment, which affixes nitrogen or nitrogen-containing chemical groups onto the surface of the film, the flame is supported by a fuel and oxidizer mixture that includes ammonia, nitrous oxide, nitric oxide or a mixture thereof in an effective amount. Large increases in the ASTM wetting test, e.g., greater than 13 mJ/m.sup.2 over that reported with conventional flame-treating processes, have been observed in films treated according to this invention. In addition, significant increases in polymer film surface oxidation levels, e.g., as much as 55 percent, have been observed, as have significant amounts of nitrogen and nitrogen-containing chemical groups affixed to film surfaces.
REFERENCES:
patent: 3153683 (1964-10-01), Bryan et al.
patent: 3153684 (1964-10-01), Bryan et al.
patent: 3255034 (1966-06-01), Covington et al.
patent: 3335022 (1967-08-01), Sincock
patent: 3347697 (1967-10-01), Gmitro
patent: 3361607 (1968-01-01), Bruno
patent: 3364056 (1968-01-01), Seibel
patent: 3375126 (1968-03-01), Nagel
patent: 3431135 (1969-03-01), Keane et al.
patent: 3661735 (1972-05-01), Drelich
patent: 3708362 (1973-01-01), Winchcombe et al.
patent: 3783062 (1974-01-01), Martin
patent: 3853584 (1974-12-01), Tatsuta
patent: 3870461 (1975-03-01), Wise
patent: 3883336 (1975-05-01), Randall
patent: 3900538 (1975-08-01), Kawakami et al.
patent: 4186018 (1980-01-01), Minagawa
patent: 4432820 (1984-02-01), Thompson
patent: 4622237 (1986-11-01), Lori
patent: 4902539 (1990-02-01), Jackson
Branch Melvyn C.
Kapaun Ronald S.
Lyons Christopher S.
Strobel Mark A.
Lipman Bernard
Minnesota & Mining Manufacturing Company
Tamte Roger R.
LandOfFree
Flame-treating process does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Flame-treating process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flame-treating process will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1853917