Patents
US 12729264 B2: Sulfur containing polyisocyanate polyaddition (PIPA) polyol with improved flame retardant properties and foams containing them
- Granted
- 2026-09-08
- Filed
- 2022-05-19 application 18546841
- Type
- Utility · 11 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
The present invention provides a sulfur containing polyisocyanate polyaddition (PIPA) polyether polyol dispersion at a readily processible viscosity for use in making flexible polyurethane foams having inherent flame retardant properties that comprises a polyether polyol carrier and from 10 to 25 wt. %, based on the total weight of the dispersion, of particles of a sulfur containing polyisocyanate polyaddition (PIPA) polyether polyol having a particle size diameter (PSD), as determined by laser light scattering, of 90%, by volume, of the particles in the dispersion having a maximum PSD of from 0.2 to 4.5 μm and that, further, contain two or more aromatic carbamate groups. The dispersion may further comprise water or a blowing agent, g) one or more catalysts; and f) one or more polyisocyanates in a foam forming mixture. In addition, the present invention provides methods for making the sulfur containing PIPA polyether polyol dispersion comprising mixing polyol reactants under shear and delaying the addition of the sulfur containing polyol or extender reactant.
Source: PTBLXML, file of 2026-09-08 (ipgb20260908.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Dow Global Technologies LLC 4,152 patents | US company or organization | Midland, MI | DOW GLOBAL TECHNOLOGIES LLC State business registration EXACT high confidence: identical full name and state | PTBLXML, file of 2026-09-08 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Hamideh Ahmadloo | Horgen, CH | 6 | PTBLXML, file of 2026-09-08 | |
| Paul Cookson | Cheadle, GB | 24 | PTBLXML, file of 2026-09-08 | |
| Nasim Hooshyar | Terneuzen, NL | PTBLXML, file of 2026-09-08 | ||
| Nebojsa Jelic | Wangen, CH | 7 | PTBLXML, file of 2026-09-08 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| C08G | Macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds | C08G18/3868 | PTBLXML, file of 2026-09-08 |
| C08J | Working-up; general processes of compounding; after-treatment not covered by subclasses c08b, c08c, c08f, c08g or c08h | C08J9/125 | PTBLXML, file of 2026-09-08 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
No recorded assignments or security interests on file for this patent.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.