Mechanically Frothed Gel Elastomers and Methods of Making and Using Them
AssigneePwe LLC
InventorsRichard B. Fox, Edmund Bard
Life of this patent
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Abstract
A method of making frothed gel in which no blowing (gas producing) agents are used, and in which non-aqueous gel precursor polyol and additive systems are frothed using a froth mix head, either prior to, or after addition of the isocyonate, depending on desired speed of reaction and cell structure. Isocyanate may be added after the material leaves the froth mix head, in which case it can be added to the froth using a static mixer. No water, or very little water, is used in the process.
Claims9
A method of making a non-aqueous frothed gel in which no blowing (gas producing) agents are used, and in which non-aqueous gel precursor polyol and additive systems are frothed using a froth mix head, either prior to, or after addition of the isocyanate, the method comprising preparing a mixed Polyol by pre-mixing Polyol, catalyst, mono functional additive, filler and (optionally) pigment, and metering said mixed polyol into the froth mix head.
A mechanically frothed gel comprising polyol in the amount of 50%-60%, in the amount of 0%-5%, monofunctional additive in the amount of 0%-15%, filler in the amount of 0%-20%, pigment in the amount of 0%-5%, surfactant in the amount of 0%-20%, and isocyanate in the amount of 15%-20%.
Dependencies are inferred from the claim text.