Claims
- 1. A stable one-part borohydride activator concentrate which has been previously blended and melted consisting essentially an inert resinous polymer, an alkali metal borohydride and a salt hydrate.
- 2. The concentrate of claim 1 wherein the borohydride is present at between about 0.5% and about 25.0% by weight.
- 3. The concentrate of claim 1 wherein the alkali metal borohydride is sodium borohydride or potassium borohydride.
- 4. The concentrate of claim 1 wherein the salt hydrate is Na.sub.2 B.sub.4 O.sub.7.5H.sub.2 O, MgSO.sub.3.6H.sub.2 O, MgSO.sub.4.7H.sub.2 O, or alumina trihydrate.
- 5. The concentrate of claim 1 wherein the resin is a polyolefin, polydiene, polystyrene, polyphenylene oxide-styrene, polyacrylate, or polyvinylacetate.
- 6. A stable, one-part borohydride activator system consisting essentially a mixture of a first composition and a second composition wherein:
- (a) the first concentrate which has been previously blended and melted composition comprises an inert resinous polymer and an alkali metal borohydride; and
- (b) the second concentrate which has been previously blended and melted composition comprises an inert resinous polymer and a salt hydrate.
- 7. The system of claim 6 wherein the borohydride is present at between about 0.5% and about 25.0% by weight.
- 8. The system of claim 6 wherein the alkali metal borohydride is sodium borohydride or potassium borohydride.
- 9. The system of claim 6 wherein the salt hydrate is Na.sub.2 B.sub.4 O.sub.7.5H.sub.2 O, MgSO.sub.3.6H.sub.2 O, MgSO.sub.4.7H.sub.2 O, or alumina trihydrate.
- 10. The system of claim 6 wherein the resin is a polyolefin, polydiene, polystyrene, polyphenylene oxide-styrene, polyacrylate, or polyvinylacetate.
- 11. A method of making a cellular article comprising:
- (a) mixing a foaming effective amount of the concentrate of claim 1 with a resinous polymer; and
- (b) extruding the mixture at a temperature at which the resinous polymer is molten when the water of hydration is released to hydrolyze the borohydride.
- 12. A method of making a cellular article comprising:
- (a) mixing a foaming effective amount of the system of claim 6 with a resinous polymer; and
- (b) extruding the mixture at a temperature at which the resinous polymer is molten when the water of hydration is released to hydrolyze the borohydride.
Parent Case Info
This application is a division, of application Ser. No. 536,332, filed Sept. 27, 1983.
US Referenced Citations (11)
Divisions (1)
|
Number |
Date |
Country |
Parent |
536332 |
Sep 1983 |
|