 Battery termination structure |
| I claim: 1. In a battery having a case, a termination structure comprising: means on said case ... |
|
| Galvanic cell comprising solid proton conductor as electrolyte |
| We claim: 1. In a galvanic cell having a metal oxide or metal sulfide electrode, a metal electrode, ... |
|
| Time responsive variable voltage power supply |
| What is claimed is: 1. A variable voltage power supply comprising: (a) an input adapted to be ... |
|
| Unitized battery package |
| Briefly, according to the invention, there is provided an electrical energy source, comprising a ... |
|
| Improved battery assembly |
| In accordance with the present invention, an improved battery and an improved battery contact ... |
|
| Dump valve |
| These and other objects and advantages of the present invention, which will appear from the ... |
|
| Semiconductor article and preparation thereof |
| An object of the present invention is to provide a semiconductor article which will not generate ... |
|
| Acid functional and epoxy functional polyester resins |
| Accordingly, a linear tertiary aliphatic carboxyl functional polyester resin is provided, ... |
|
| Vented filling plugs for electric storage cells |
| OF A PREFERRED EMBODIMENT The plug comprises a base 2 connected to a body 4 carrying a flip top ... |
|
| Automatic watering system for batteries and fuel cells |
| OF THE PREFERRED EXEMPLARY EMBODIMENTS Referring now to FIG. 1, there is shown an automatic ... |
|
|
Process for treating selected areas of a surface with solder
| Details |
Inventors: Lipson, Melvin A.; Knoth, Dale W.; Custer, Walter D.; Gilano, Michael N.;
Assignee: Dynachem Corporation (Santa Ana, CA)
Primary Examiner: Smith; Ronald H.
Assistant Examiner: Konopacki; Dennis C.
Attorney, Agent or Firm: Marcus; Stanley A.
Highly durable coatings are formed by the photopolymerization of screen printing inks containing aryloxyalkyl acrylate monomers or prepolymers, a polymerizable diluent and a free-radical initiating system, such inks having a viscosity of 5,000 to 200,000 centipoises and a thixotropic index of from 1 to 6. The photopolymerizable inks are useful for coating substrates, such as printed circuits, and serve as solder masks and resists for electroless plating, electroplating and etching. |
|
DETAILED DESCRIPTION We claim: 1.
A process for treating selected areas of a surface with solder which comprises: A.
screen printing on the surface of a substrate a liquid photopolymerizable ink, thereby leaving on the surface of said substrate an image corresponding to the image on said silk screen the screen printing ink comprising i.
35-70% by weight of an aryloxyalkyl acrylate having the general formula: ##STR4## wherein X is methylene, an alkyl-substituted methylene group, a dialkyl-substituted methylene group, a carbonyl group, a sulfide, a sulfoxide, a sulfone, an amine, an alkyl-substituted amine, an ethylene ether, a propylene ether or, a 2-hydroxylpropylene ether, wherein each alkyl group contains from 1 to 8 carbon atoms; Y is lower alkyl or lowerhydroxyalkyl of 2 to 8 carbon atoms; A is an unsaturated acyloxy group having from 3 to 18 carbon atoms; and n is 0 through 20, m is 0 or 1, p is 0 or 1; ii.
15-45% by weight of a photopolymerizable diluent having terminal ethylenic groups selected from ethylene diacrylate; diethylene glycol diacrylate; tetraethylene glycol diacrylate; glycerol diacrylate; glycerol triacrylate; ethylene dimethacrylate; 1,3-propylene dimethacrylate; 1,2,4-butanetriol trimethacrylate; 1,4-benzenediol dimethacrylate; pentaerythritol tetramethacrylate; 1,3-propanediol diacrylate; 1,6-hexanediol diacrylate; the bis-acrylate of a polyethylene glycol having a molecular weight of 200 to 500; bis-methacrylate of a polyethylene glycol having a molecular weight of 200 to 500; trimethylolpropane triacrylate; pentaerythritol triacrylate; methylene bis-acrylamide; methylene bis-methacrylamide; 1,6-hexamethylene bis-acrylamide; diethylene triamine tri-methacrylamide; bis-(methacrylamidopropoxy) ethane; bis-methacrylamidoethyl methacrylate N-(beta-hydroxyethyloxy) ethyl acrylamide; divinyl succinate; divinyl adipate; divinyl phthalate; divinyl terephthalate; divinyl benzene-1,3-disulfonate; divinyl butane-1,4-disulfonate; and sorbaldehyde; iii.
0.
1-10% by weight of a free radical generating addition polymerizing initiating system; said photopolymerizable composition having a viscosity of from 5,000 to 200,000 centipoises and a thixotropic index of from 1
|
|
Fuel Cells 
