Moulded compounding mixtures of adjustable density

Details Moulded compounding mixtures of adjustable density Moulded compounding mixtures of adjustable density

1983-07-07

1987-02-24

Jacobs, Lewis T.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524439, 524440, 524594, 524595, 524596, 524876, 523500, C08L 6706, C08L 6300, C08L 6104

Patent

active

046457844

ABSTRACT:
There is provided a method for preparing cured moulded article of a predetermined density of from 1.66 to 9.0 which comprises selecting the resin and determining it % weight loss and % porosity under the curing conditions for the selected resin, then selecting a high density filler and a low density filler and resolving the equation: ##EQU1## wherein K is the desired density of the end product and has a value of from 1.66 to 9.0; HD is the density of the selected high density substantially water-insoluble material and has a value of above 3.2; ID is the density of the selected medium density substantially water-insoluble material and has a value of from 1.5 to 3.2; R is the density of the cured binding resin and has a value between 0.8 to 1.5; A is the percentage by weight of the selected high density filler having the density HD and has a value of from 10 to 90%; B is the percentage by weight of the selected medium density filler having the density ID and has a value of from 0 to 86%; C is the percentage by weight of the selected binding resin having the density R and has a value of from 4 to 70%; and Y is the porosity of the end product expressed in % of the volume of the moulded object.

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patent: 4009146 (1977-02-01), Cork et al.
Delmonte; Metal-Filled Plastics; Reinhold Pub. Corp.; 1961; pp. 4, 22, 23.
Katz et al.; Handbook of Fillers and Reinforcements for Plastics; Van Nostrand Reinhold Co.; 1978; p. 193.
Harper; Electronic Packaging with Resins; McGraw-Hill Book Co., Inc.; 1961; p. 123.

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