Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Compositions to be polymerized by wave energy wherein said...
Reexamination Certificate
1998-05-20
2001-01-16
Seidleck, James J. (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Compositions to be polymerized by wave energy wherein said...
C522S170000, C522S102000, C522S031000, C522S071000, C522S083000, C522S078000, C522S079000, C522S074000, C522S084000, C427S508000, C427S487000, C427S516000, C427S518000, C427S517000, C427S521000
Reexamination Certificate
active
06174932
ABSTRACT:
FIELD OF THE INVENTION
The instant invention relates to a novel composition, methods for applying the composition as well as end-uses for the cured composition
BACKGROUND OF THE INVENTION
Sealants are employed in a wide range of applications. In the automotive industry sealants are located between and upon metal seams and welds, within hollow cavities to impart structural and sound damping characteristics, among other locations. One example of an automotive sealant is utilized upon the welds in the so-called “roof-ditch” which is formed when joining the side panels of the body to the roof. The roof-ditch weld is conventionally covered with a strip of polyvinyl chloride (PVC) based molding which typically is covered with a metal strip and painted. The PVC strip typically contains plasticizers, stabilizers, lubricants, among other compounds that can volatilize from the strip thereby causing cracking and shrinking. When the PVC strip cracks such can reduce the effectiveness of the strip and in turn allow the underlying metal to corrode.
Conventional sealants including those employed in roof ditches can also create conditions which are conducive to microbial, e.g., fungal, growth; especially in warm humid environments. The microbe growth occurs because the sealant contains substances that can be metabolized by the microbe. Consequently, there is a need in the sealant industry for a sealant with enhanced durability, and microbial resistance and cosmetic value that can be applied in an expedient manner. There is also a need in this industry for a sealant that can be repaired or replaced.
Methods for applying and curing/heating coatings are described in U.S. Pat. Nos. 4,844,947 (Kasner et al.), 5,348,604 (Neff) and 5,453,451 (Sokol). The disclosure of the previously identified patents is hereby incorporated by reference.
SUMMARY OF THE INVENTION
The instant invention solves problems associated with conventional practices by providing a radiation curable composition, which can be employed as a sealant that is easy to manipulate, durable, paintable, repairable/replaceable, crack and microbe resistant. The inventive composition can be employed in a wide range of end-uses including in the automotive industry, e.g., as a roof-ditch sealant. The composition of the invention can be applied by using commercially available dispensing equipment, e.g., spraying or pumping, and cured in-situ by a source of UV radiation. If desired, the inventive composition can be painted. The inventive composition comprises or consists essentially of at least one epoxy, at least one polyol, at least one thickener or filler, one or more suitable photoinitiators and optionally at least one monomer and/or phenoxy resin.
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PCT Search Report Fusion UV Curing Systems Model F600—EPIQ 6000: The Next Dimension in UV Curing.
Sartomer Photopolymerization Behavior of Several Cationic Photoiniators in Cationically Cured Resin Systems—By Edward Allen Jurczak.
Pachl Jeffrey T.
Scrivens Todd W.
Taylor Donald
Boyer Michael K.
Denovus LLC
McClendon Sanza
Seidleck James J.
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