Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1981-12-04
1983-07-12
Griffin, Ronald W.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
260DIG16, 260DIG19, 260DIG21, 523105, 523112, 524430, 524437, 524451, 5253337, 525360, 525370, 525369, C09K 316
Patent
active
043931596
ABSTRACT:
A thermoplastic material formed from a hydrocarbon chain is modified to inhibit the production of static charges. The thermoplastic material may be a polypropylene. A weak salt having properties of ionizing and having its positive ions bond chemically to the thermoplastic material is mixed in the thermoplastic material. A chemical agent is also dispersed in the thermoplastic material and is provided with properties of facilitating the dispersion of the positive ions of the weak salt throughout the thermoplastic material for chemical bonding to the thermoplastic material. The chemical agent may also be bonded chemically to the thermoplastic material. The weak salt may be cupric acetate and the chemical agent may be an ethoxylated amine when the thermoplastic material is polypropylene. The polypropylene is preferably mixed with a suitable material such as polyethylene to enhance the amorphous characteristics of the thermoplastic material. The chemical bonding occurs primarily to the portion of the thermoplastic material having the amorphous characteristics.
The material of this invention may be formed as bags or as sheets. The material may be formed by mixing the different chemicals and extruding the mixture under conditions of controlled temperatures and pressures and for controlled dwell times. Preferably the material is not vented to the atmosphere during the extrusion operation.
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Bengal, Inc.
Griffin Ronald W.
Roston Ellsworth R.
Schwartz Charles H.
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