Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Patent
1991-06-20
1993-09-28
Thibodeau, Paul J.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
42840224, 428403, 430138, 430537, 430539, 430642, B32B 516
Patent
active
052485587
ABSTRACT:
It has been shown by Photon Correlation Spectroscopy than when additional hardener is added to below saturation gel-grafted polymer particles, the gel layer shrinks due to hardening, as there is no free gel left in solution. In films, such case-hardened gelatin-grafted soft polymer particles can act as highly elastic stress absorbing fillers. This is because the dry case-hardened shell is expected to form a thin hard shell around the soft polymer particles. It is shown that gelatin-grafted soft polymer particles and case-hardened gelatin-grafted soft polymer particles, incorporated in the emulsion layers of pressure sensitive photographic products, produce coatings with highly reduced pressure sensitivity without any developability or delamination concerns. In this invention the case-hardened gelatin-grafted polymer particles are preferred over the simple gelatin-grafted material. The core polymer particle can have diameters anywhere between 10 to 10.sup.8 nm with a monolayer of gelatin shell that is chemically bonded to its surface and the gelatin shell is further cross-linked with each other to hydrated thicknesses of between 5 to 20 nm.
REFERENCES:
patent: T969005 (1978-04-01), Tanaka et al.
patent: 3507661 (1970-04-01), Ofstead
patent: 3576628 (1971-04-01), Beavers
patent: 3844816 (1974-10-01), Vassiliades et al.
patent: 4115474 (1978-09-01), Vassiliades et al.
patent: 4499179 (1985-02-01), Ota et al.
patent: 4822727 (1989-04-01), Ishigaki et al.
patent: 4840881 (1989-06-01), Watanabe et al.
patent: 4855219 (1989-08-01), Bagchi et al.
patent: 4920004 (1990-04-01), Bagchi
patent: 5026632 (1991-06-01), Bagchi et al.
patent: 5066572 (1991-11-01), O'Connor et al.
Curme et al., J. Phys. Chem., 1964, pp. 3009-3016.
Dautrick et al., J. Photogr. Sci., 1973, pp. 221-226.
Farnell et al., J. Photogr. Sci., 1982, pp. 109-117.
Bagchi Pranab
Gardner William L.
Eastman Kodak Company
Leipold Paul A.
Nakarani D. S.
Thibodeau Paul J.
LandOfFree
Case-hardened gelatin-grafted polymer particles does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Case-hardened gelatin-grafted polymer particles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Case-hardened gelatin-grafted polymer particles will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2190057