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AssigneeNone recorded
InventorsMarco A. Villalobos, Warunee Srisiri-Sisson, Alan J. Pekarik, J. David Campbell
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A process is disclosed for a continuous, high temperature polymerization process for preparing a free radically polymerized epoxy-functional polymeric product. The process comprises continuously charging into a reactor at least one epoxy-functional acrylic monomer, and optionally at least one non-functional free radical polymerizable monomer. An optional free radical polymerization initiator may also be added. The reactor is maintained at an effective temperature for an effective period of time to cause polymerization of the monomers into a polymeric product, such that the polymeric product is formed substantially free of gel particles. A clear coating is also disclosed incorporating polymers of the present invention, such that the clear coating has a low Delta b value at standard conditions.
A continuous, high temperature polymerization process for preparing a free radically polymerized epoxy-functional polymeric product comprising:
A continuous, high temperature polymerization process for preparing a free radically polymerized epoxy-functional polymeric product comprising;
A powder coating composition, comprising:
A powder coating composition, comprising:
A liquid coating composition, comprising:
A liquid clear coating composition, comprising:
A continuous, high temperature polymerization process for preparing a free radically polymerized epoxy-functional polymeric product comprising:
A powder clear coating composition, comprising:
A liquid coating composition, comprising:
Dependencies are inferred from the claim text.
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Containing epoxy radicals: containing glycidyl radical, e.g. glycidyl acrylate
Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
Term end not estimated
The present invention relates to a continuous process for the production of epoxylated addition polymers, to the polymeric products produced by the process, to powder and liquid coating applications containing the polymeric products made by the process, and to powder and liquid coatings containing epoxylated addition polymers.
Continuous processes for the production of polymers are well known in the art. However, many of the processes used to date to produce polymers for industrial use suffer from significant limitations including high cost, significant gelation problems when utilizing epoxy-containing monomers, poor incorporation levels of particular monomers, and an inability to produce polymers that can be utilized in weatherable and non-yellow coating applications.
U.S. Pat. No. 4,414,370, issued to Hamielec et al., discloses a continuous bulk polymerization process for polymerizing vinylic monomers to prepare low molecular weight polymers employing thermal initiation at reaction temperatures from 235° C. to 310° C. and residence times of at least 2 minutes in a continuous stirred reactor zone.
The preferred exemplary embodiment of the invention will hereinafter be described in conjunction with the appended drawings, wherein like numerals denote like elements and:
FIG. 1 is a graph illustrating the effect of the increase of functional and non-functional methacrylate monomer conversion as a function of an increase in concentration of non-functional acrylate monomer and non-functional non-α substituted styrenic monomer.
FIG. 2 is a schematic diagram of a polymer production line of the present invention;
In the present application, the following terms are used consistently throughout, and are defined as follows:
Comparable acrylate free polymeric product—A polymeric product that is produced by the same continuous process of the present invention, and comprises the same monomers in the reactor feed, except no acrylate monomers are present in the reactor feed.
Comparable batch polymeric product—A polymeric product that is produced from the same monomer composition as the polymeric product of the present invention, and differs in that it is produced via a batch or semi-batch process rather than a continuous process as provided for by the present invention.