Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1990-12-03
1993-01-05
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524320, 524321, 524322, C08K 510
Patent
active
051771349
ABSTRACT:
A tacking agent is provided for use in temporarily adhering electronic components and providing fluxing properties for soldering electronic assemblies. The tacking agent comprises a fluxing agent and a tackifier. The fluxing agent is composed of one or more carboxylic acids having the formula ##STR1## where R is an alkyl group containing from 1 to 6 carbon atoms, R' is selected from the group consisting of hydrogen and hydroxyl, and R" is selected from the group consisting of hydrogen, hydroxyl and carboxyl. The tackifier comprises one or more alcohols, aromatic hydrocarbon solvents, aliphatic hydrocarbon solvents, or polymers. The tacking agent is deposited onto a printed circuit board or other substrate, the electronic components are placed into the deposited tacking agent and soldered. During solder reflow the fluxing agent provides fluxing action for the soldering process, and the tackifier volatilizes, leaving little or no residue on the printed circuit board.
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Mullen, III William B.
Pennisi Robert W.
Suppelsa Anthony B.
Dorinski Dale W.
Guarriello John J.
Michl Paul R.
Motorola Inc.
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