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US 4,380,569 AGranted
Lightweight preformed stable gel structures and method of forming
AssigneeSpenco Medical Corporation
InventorRobert E. Shaw
Life of this patent
Estimating the term…
Abstract
A lightweight preformed stable gel composition formed by admixing a gel mixture of silicon gels and catalyst with glass microspheres, pouring the mixture into a mold and reacting the mixture. The resulting composition is a preformed stable silicon gel with glass microspheres dispersed throughout.
Claims35
The method of forming a lightweight stable gel comprising the steps of:
- (a) preparing at low temperature a gel mixture by admixing;
- (i) methyl polysiloxane containing silicon-bonded vinyl groups, with
- (ii) methyl polysiloxane containing SiH groups, and
- (iii) a platinum catalyst;
- (b) mixing glass microspheres into said gel mixture;
- (c) pouring the resulting mixture into a mold of desired shape;
- and
- (d) allowing the resulting mixture to react until a stable silicon gel structure is formed.
5 more elements
The method of forming a lightweight stable gel comprising the steps of:
- (a) preparing at low temperature a gel mixture containing from about 50 to 60 weight percent of a methyl polysiloxane containing silicon-bonded vinyl groups, and from about 50 to 40 weight percent methyl polysiloxane containing SiH groups and a platinum catalyst;
- (b) mixing from 1 to about 30 weight percent glass microspheres into said gel mixture;
- (c) pouring the resulting mixture into a mold of a desired shape;
- and
- (d) allowing the resulting mixture to react until a stable silicon gel structure is formed.
2 more elements
A lightweight stable gel structure comprising:
- (a) a preformed self-contained stabilized gel structure of desired size and shape;
- and
- (b) said gel structure containing a multiplicity of glass microspheres dispersed throughout said gel structure wherein said gel is a silicon gel, the reaction product of a methyl polysiloxane containing silicon-bonded vinyl groups and methyl polysiloxane containing SiH groups which have been catalyzed by platinum to establish and substantially retain said shape.
A lightweight stable gel structure comprising:
- (a) a preformed self-contained stabilized gel structure of desired size and shape;
- (b) said gel structure containing a multiplicity of glass microspheres dispersed throughout said gel structure;
- and
- (c) an elastic fabric cover which yields in response to pressures exerted thereon by said gel in which said gel is a silicon gel, the reaction product of a methyl polysiloxane containing silicon-bonded vinyl groups and methyl polysiloxane containing SiH groups which have been catalyzed by platinum to establish and substantially retain said shape.
1 more element
The composition of matter comprising:
- (a) a stabilized silicon gel which is the reaction product of a methyl polysiloxane containing silicon-bonded vinyl groups and methyl polysiloxane containing SiH groups which have been catalyzed by platinum to establish and substantially retain a predetermined shape;
- and
- (b) said stabilized silicon gel containing a multiplicity of glass microspheres dispersed throughout said stabilized silicon gel.
Dependencies are inferred from the claim text.