 Hollow artery anode wick for passive variable pressure regenerative fuel cells |
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| Fuel cell, electrolytic cell and process of cooling and/or dehumidifying same |
| OF THE INVENTION For both of the fuel cell and the electrolytic cell, the miniaturization is one ... |
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| One piece fuel cell separator plate |
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| Planar fuel cell |
| OF THE PREFERRED EMBODIMENT A planar fuel cell is created by sandwiching a membrane electrode ... |
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| Emulsion producing apparatus and its combustion system |
| OF THE PREFERRED EMBODIMENTS A preferred embodiment of this invention will be described in ... |
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| Fuel cell cooled by latent heat of water evaporation |
| Therefore, an object of the present invention is to maintain both cooling and wetting of a membrane.... |
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| Apparatus for manufacturing cellulosic fibrous material which can be pressed into molded parts |
| We claim: 1. An apparatus for manufacturing a dry-shaped cellulosic fibrous transportable mat ... |
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| Resin material supply apparatus for resin press molding machine |
| The present invention has a purpose, in view of above conventional problems, to prevent leakage of ... |
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| Pulsating gas-assisted injection molding apparatus |
| The present invention resulted from the recognition that if the plastic region encompassing the ... |
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| Composite electrodes |
| OF THE INVENTION Referring now to FIGS. 1 and 2, the electrode 10 is generally a rectangular plate ... |
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Conductive gray in-mold coating
| Details |
Inventors: Cobbledick, David S.; Reichenbach, Donald F.;
Assignee: GenCorp Inc. (Fairlawn, OH)
Primary Examiner: Marquis; Melvyn I.
Assistant Examiner: Gulakowski; Randy
Attorney, Agent or Firm: Rywalski; Robert F., Laferty; Samuel B.
A thermosetting in-mold coating for molded fiber-reinforced plastic parts is disclosed. The binder for the thermosetting coating is comprised of least one polymerizable epoxy-based oligomer having at least two acrylate groups and at least one copolymerizable ethylenically unsaturated monomer. The coating includes graphite and titanium dioxide which results in the gray color. The coating composition has good flow and coverage during molding, good adhesion, uniform color, good surface quality, and good paintability. The coating composition includes enough carbon black so that a 1.0 mil thick coating has a Ransburg conductivity meter reading of at least 165 units. |
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DETAILED DESCRIPTION OF THE INVENTION The thermosetting coating compositions of the present invention are based upon a polymerizable epoxy-based oligomer having at least two acrylate (or methacrylate or ethacrylate) groups and are prepared by reacting acrylic acid, methacrylic acid, ethacrylic acid, or similar acids with an epoxy based oligomer or resin such as bisphenol A epoxy, a tetrabromo bisphenol A epoxy, phenolic novalak epoxy, tetraphenylolethane epoxy, dicycloaliphatic epoxy and equivalents.
Mixtures of these epoxy based oligomers can be used.
The term (alkyl) acrylate shall be used to specify acrylate, methacrylate, or ethacrylate.
Of these materials it is preferred to use a diacrylate terminated bisphenol A epoxy oligomer.
They have weight average molecular weights of from about 500 to about 1,500.
Such materials are well known to the art and to the literature, as for example, Cargill Resin 1570, a diacrylate ester of a liquid bisphenol A epoxy resin.
Examples of other suitable materials can be found in "Heat Resistant Vinyl Ester Resin," M.
B.
Launikitis, Technical Bulletin, SC:116-76, Shell Chemical Company, June 1976 and Shell Chemical Company Technical Bulletins SC:16-76 and C:60-78.
Incorporated herein by reference for its teachings is U.
S.
application Ser.
No.
08/053,795, abandoned filed Apr.
26, 1993 for D.
Cobbledick et al.
entitled "Conductive Gray In-Mold Coating".
When certain soluble ionic organic salts are present in the above vinyl ester resins or when these salts are added to an in-mold coating composition less conductive carbon black is required to achieve a specified Ransburg conductivity meter reading.
The amount of said salt is desirably from about 0.
1 to about 1.
5 or 5 parts by weight per one hundred parts by weight of said epoxy based oligomer (vinyl ester resin), (j) The soluble ionic organic salt, which is added to the in-mold composition to improve conductivity without increasing viscosity, has the following general formula: ##STR1## where R.
sub.
1 through R
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Nonmetallic Processes 
