Restructuring silicone rubber to produce fluid or grease

Details Restructuring silicone rubber to produce fluid or grease Restructuring silicone rubber to produce fluid or grease

1996-05-01

1997-12-09

Acquah, Samuel A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Process of treating scrap or waste product containing solid...

521 41, 521 445, 521 455, 521 475, 252321, 252358, 524588, 20415742, 20415745, 20415762, 20415774, 528481, 528488, 528490, 528502, 528503, C08J 1104, C08L 8300, C01B 2500

Patent

active

056961731

ABSTRACT:
The invention comprises processes for the production of useful fluid or grease from curable silicone compositions or silicone rubbers, preferably reclaimed or scrap silicone rubber. The processes involve the application of energy in such a manner that a un-curable silicone grease or liquid that contains essentially all of the original material is produced from curable silicone compositions and grease or liquid is produced from silicone rubbers. Suitable energy forms include thermal and mechanical. The fluid or grease produced by the processes are useful as raw materials for the manufacture of silicone products such as: antifoam compounds (defoamers), greases, conformal coatings or rubbers. The materials produced by these processes were unexpectedly found to have exceptional antifoam properties without requiring the addition of other materials or further processing. A second unexpected finding is that finely ground silicone rubber possesses antifoam properties and that grinding and extraction techniques can produce a silicone fluid with significant utility in foam suppression. Foam suppression is also achieved through the direct addition of ground silicone rubber to certain foaming systems. A process for controlling foam that involves adding silicone rubber that has been softened by ultrasonic means to a foaming system is also revealed.

REFERENCES:
patent: 5215635 (1993-06-01), Stein et al.

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