 Quasi-passive variable pressure regenerative fuel cell system |
| Conventional passive, variable pressure, regenerative fuel cell systems utilize mechanical valves, ... |
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| Hollow artery anode wick for passive variable pressure regenerative fuel cells |
| Conventional passive, variable pressure, regenerative fuel cell systems utilize mechanical valves, ... |
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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 |
| It is an object of this invention to provide a bi-polar separator plate for a fuel cell which ... |
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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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Flexible sheet molding compound and method of making the same
| Details |
Inventors: Iseler, Kenneth A.; Duffield, Phoebe; Yen, Robert C.;
Assignee: The Budd Company (Troy, MI)
Primary Examiner: Michl; Paul R.
Assistant Examiner: Cain; Edward J.
Attorney, Agent or Firm: Harness, Dickey & Pierce
Molded articles prepared from flexible sheet molding compounds, and method of making the same. A flexibility modifying agent is incorporated into a thermoset resin composition (e.g. sheet molding compound) to improve the flexibility characteristics of the thermoset resin composition by lowering the flexural modulus. The thermoset resin composition also contains therein an isocyanate terminated urethane prepolymer; a thickening agent; a catalyst; a fibrous reinforcing material; and an inert filler. |
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DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT "Flexibility modifying agent", as used herein, refers to an additive that when used in a resin system will result in a resin system that shows a significant and reproducible improvement in one or more of the mechanical or aesthetic properties of the resin system as compared to a resin system without a flexibility modifying agent.
Examples of such properties include, without limitation, toughness, flexural modulus, and chip resistance.
Materials modified using a flexibility modifying agent also exhibit good surface finish characteristics and a desirable specific gravity and thermal expansion coefficient.
The flexibility modifying agents of the present invention are preferably a polymer of the type including elastomeric or flexible polymers.
For instance, it is contemplated that the preferred flexibility modifying agents include one or more polymers based on systems such as butadienes, polybutadienes, styrenes, polystyrenes, polyolefins (e.
g.
poly/ethylene/propylenes), styrene-butadienes, acrylonitriles, methacrylates (e.
g.
methyl methacrylate) or the like.
More preferably, the polymer is one selected from the group consisting of polystyrene-polybutadiene-polystyrene ("S-B-S") polystyrene-polyisoprene-polystyrene ("S-I-S"), polystyrene-ethylene/butylene-polystyrene ("S-EB-S), and mixtures thereof.
As can be appreciated such copolymers may be linear, branched, or may include varying ratios of both.
However, in the present preferred embodiment, the S-B-S copolymer is linear, the S-I-S copolymer is branched, and the S-EB-S copolymer is branched.
Such materials may be prepared according to known methods.
A highly preferred flexibility modifying agent includes a two-component admixture.
The first component includes S-B-S admixed with S-I-S, wherein the first component is present in an amount of about 10 to about 40 percent by weight of the total admixture.
The second component includes S-EB-S, present in an amount of about 60 to about 90 percent by weight of the total admixture
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Nonmetallic Processes 
