Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1996-01-25
1996-10-08
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
1563086, 1563317, 524 94, 524 99, 524107, 524110, 524111, 524113, 524589, 4284231, 4284246, C08J 300, C08K 320, C08L 7500, B32B 2700
Patent
active
055631932
ABSTRACT:
There is now provided a solvent cement having a total of less than 80 weight percent of solvents and a thermoplastic polyurethane elastomer as at least one of the resins dissolved in the solvent. The solvent mixture contains at least a 5- or 6-membered water miscible lactone or lactam such as N-methyl-2-pyrrolidone (NMP) in an amount of 21 weight percent or less based on the weight of all the ingredients. The reduced solvent concentration assists in lowering VOC emissions while preserving the hydrostatic burst strength mechanical property required by ASTM D 2564-88.
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Abel Ulrich
James Lawrence E.
Waldrop Mark W.
BASF Corporation
Marshall Paul L.
Michl Paul R.
Niland Patrick
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