Moulded compounding mixtures of adjustable density

Claim 1

A method for preparing a cured moulded article having a density of from 1.66 to 9.0 which comprises: (a) selecting the desired density K of the moulded article between value of from 1.66 to 9.0; (b) selecting a binding resin from the group consisting of phenolic resin, polyester resin and expoxy resin, the selected resin having a density R after curing between 0.8 to 1.5 and being in the amount A of from 4 to 70% by weight; (c) determining the percentage of porosity Y in the cured moulded article under the moulding conditions to be used; (d) selecting a high density substantially inert and water-insoluble filler having a density HD of above 3.2; (e) selecting an intermediate density substantially inert and water-insoluble filler having a density ID of from 1.5 to 3.2 if desired; (f) mixing the amounts of binding resin, high density filler and intermediate density filler according to the equation: ##EQU5## wherein: K is the denisty of the cured mixture and has a value of from 1.66 to 9.0; A is the percentage by weight of the high density substantially water-insoluble filler and has a value of from 10 to 90% by weight; HD is the density of the filler of the high density filler and has a value above 3.2; B is the percentage by weight of the intermediate density substantially water-insoluble filler and has a value of from 0 to 86%; ID is the denisty of the filler of medium density and has a value of from 1.5 to 3.2; C is the percentage by weight of the cured binding resin and has a value of from 4 to 70% by weight; R is the denisty of the cured binding resin and has a value of from 0.8 to 1.5; Y is the porosity of the end product expressed in % of the volume of the moulded product, and (g) moulding and curing the mixture.

Claim 2

A method for preparing a cured moulded article having a density of from 1.66 to 9.0 which comprises: (a) selecting the desired density K of the moulded article between value of from 1.66 to 9.0; (b) selecting a binding resin from the group consisting of phenolic resin, polyester resin and expoxy resin, the selected resin having a density R after curing between 0.8 to 1.5 and being in the amount A of from 4 to 70% by weight; (c) determining the percentage of porosity Y in the cured moulded article under the moulding conditions to be used; (d) selecting a high density substantially inert and water-insoluble filler having a density HD of above 3.2; (e) selecting an intermediate density substantially inert and water-insoluble filler having a density ID of from 1.5 to 3.2 if desired; (f) mixing the amounts of binding resin, high density filler and intermediate density filler according to the equation: ##EQU5## wherein: K is the denisty of the cured mixture and has a value of from 1.66 to 9.0; A is the percentage by weight of the high density substantially water-insoluble filler and has a value of from 10 to 90% by weight; HD is the density of the filler of the high density filler and has a value above 3.2; B is the percentage by weight of the intermediate density substantially water-insoluble filler and has a value of from 0 to 86%; ID is the denisty of the filler of medium density and has a value of from 1.5 to 3.2; C is the percentage by weight of the cured binding resin and has a value of from 4 to 70% by weight; R is the denisty of the cured binding resin and has a value of from 0.8 to 1.5; Y is the porosity of the end product expressed in % of the volume of the moulded product, and (g) moulding and curing the mixture.