Polysiloxane-polyoxyalkylene compositions used in polyurethane foam
US3935123A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1974 |
| Grant date | Jan 27, 1976 |
| Priority date | — |
| Expiry date | Sep 20, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/921
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Provided as novel compositions which are especially useful as stabilizers of flame-retarded, flexible polyether polyol-based urethane foam, is an admixture containing from about 10 to about 90 weight percent of Component A and from about 90 to about 10 weight percent of Component B, said percentages being based on the total weight of A and B contained in the admixture, wherein: Component A is a cyano-bearing polysiloxane-polyoxyalkylene copolymer having the average composition, EQU (R).sub.3 SiO[(R).sub.2 SiO].sub.x [(NC-R')(R)SiO].sub.y [(R) (E)SiO].sub.z Si(R).sub.3 wherein R is alkyl, R' has at least two carbon atoms and is bivalent alkylene or an oxyalkylene group the oxygen atom of which is bonded to silicon, and the respective average values of x, y and z are from about 10 to about 200 (x), from about 3 to about 100 (y) and from about 2 to about 30 (z), and E comprises a polyoxyalkylene block the oxyalkylene content of which is constituted of from about 20 to about 65 weight percent oxyethylene; and Component B is a polyalkylsiloxane-polyoxyalkylene copolymer the oxyalkylene content of which is constituted of from about 20 to about 75 weight percent oxyethylene. The admixture…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.