Silicone rubber
AssigneeWacker Chemie AG
InventorsDietrich Wolfer, Wilhelm Marsch
Life of this patent
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Abstract
The invention relates to compositions which can be prepared from at least one polyorganosiloxane, boric acid and water, and which may serve as a pelletizing additive for crosslinkable silicone rubber formulations. A small proportion of the pelletizing additive, when added to a ore component crosslinkable silicone rubber, or to individual components of a two or more component silicone rubber formulation, allow production of free flowing pellets which retain storage stability for extended periods of time.
Claims25
An additive composition suitable for incorporation as a pelletizing aid into a curable silicone rubber formulation, said composition prepared by admixing ingredients comprising a polyorganosiloxane, boric acid, a fatty acid salt, and water.
A free flowing pelletized crosslinkable silicone rubber formulation or component thereof, comprising:
- a) a crosslinkable silicone rubber or component thereof, comprising
- a)i) a peroxidically crosslinkable silicone rubber formulation, or
- a)ii) one or more components of a two or more component addition crosslinkable silicone rubber formulation;
- and
- b) the components of a pelletizing additive comprising
- b)i) an organopolysiloxane;
- b)ii) boric acid, and
- b)iii) sufficient water to allow admixing b)i and b)ii to form a homogenous boric acid-containing formulation.
An additive composition suitable for incorporation as a pelletizing aid into a curable silicone rubber formulation, said composition prepared by admixing ingredients comprising a polyorganosiloxane, boric acid, and water.
An additive composition suitable for incorporation as a pelletizing aid into a curable silicone rubber formulation, said composition prepared by admixing ingredients comprising a polyorganosiloxane, 8-13 weight % boric acid based on the total weight of the pelletizing additive, and water.
An additive composition suitable for incorporation as a pelletizing aid into a curable silicone rubber formulation, said composition prepared by admixing ingredients comprising from 30 weight percent to 90 weight percent polyorganosiloxane based on the total weight of the pelletizing additive, boric acid, and water.
Dependencies are inferred from the claim text.