Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2005-03-08
2005-03-08
Egwim, Kelechi C. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C524S422000, C524S832000, C524S833000, C526S086000, C526S318400, C526S328500
Reexamination Certificate
active
06864335
ABSTRACT:
In forming pressure sensitive adhesive microspheres by copolymerizing a non-ionic monomer of an alkyl acrylate or alkyl methacrylate ester of a non-tertiary alcohol and an ionic monomer copolymerizable with said non-ionic monomer, non-free radically polymerizable acid is present during the polymerization to promote formation of solid rather than hollow microspheres and to reduce residual unconverted ionic monomer. These microspheres exhibit reduced adhesive transfer in downstream use as a repositionable pressure sensitive adhesive. A water soluble initiator is optionally added to the polymerization mixture after achieving about 90% conversion of the non-ionic monomer to further reduce residual unconverted ionic monomer.
REFERENCES:
patent: 3691140 (1972-09-01), Silver
patent: 4786696 (1988-11-01), Bohnel
patent: 5045569 (1991-09-01), Delgado
patent: 5053436 (1991-10-01), Delgado
patent: 5508313 (1996-04-01), Delgado et al.
patent: 5514122 (1996-05-01), Morris et al.
patent: 5571617 (1996-11-01), Cooprider et al.
patent: 5578650 (1996-11-01), Delgado et al.
patent: 5656705 (1997-08-01), Mallya et al.
patent: 6312715 (2001-11-01), Cantor et al.
Guo Jong-Shing
Trembley Sharon D.
Egwim Kelechi C.
Lathrop & Gage L.C.
Surf Chip, Inc.
LandOfFree
Process for forming solid pressure sensitive adhesive... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for forming solid pressure sensitive adhesive..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for forming solid pressure sensitive adhesive... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3432617