Formation of high-resilience urethane foam in the presence of sulfolanyloxy alkyl-polyalkylsiloxanes
US4110272A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 1977 |
| Grant date | Aug 29, 1978 |
| Priority date | — |
| Expiry date | Jul 12, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2483/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The formation of high-resilience polyurethane foam is provided by the use, as the foam-stabilizing component, of a particular class of sulfolanyloxyalkyl-polyalkylsiloxanes which consist essentially of: (1) monofunctional siloxy units (M.degree.) the respective silicon atoms of which have two alkyls bonded thereto, the third silicon-bonded organic group being alkyl or sulfolanyloxyalkyl; (2) an average of from about 0.5 to about 10 moles of difunctional dialkylsiloxy units for every two moles of M.degree.; and (3) from 0 up to an average of about 10 moles, for every two moles of M.degree., of difunctional monoalkylsiloxy units in which the second organic group bonded to silicon is sulfolanyloxyalkyl, provided an average of at least about 0.5 and no more than about 10 moles of sulfolanyloxyalkyl groups are present in the sulfolanyloxyalkyl-polyalkylsiloxanes for every two moles of M.degree.. In addition to such sulfolanyloxyalkyl-polyalkylsiloxanes, the high resilience polyurethane foam formulations employed in the method of the invention contain an organic polyol reactant comprising a polyether polyol reactant having an average primary hydroxyl content of at least about 35 mole per…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.