Open-cell polyisocyanurate foam for fixing and supporting plants
US6271274A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 3, 1999 |
| Grant date | Aug 7, 2001 |
| Priority date | — |
| Expiry date | May 3, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2483/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An open-cell polyisocyanurate foam for fixing and supporting plants, which is prepared from an aromatic isocyanate, a hydroxyl compound having an average number of functional groups of 1.0 or above and an oxyethylene content of 20 wt % or above, an isocyanuration catalyst and a silicone foam stabilizer consisting of a polysiloxyane/polyoxyalkylene copolymer wherein the terminal OH group of the polyether segment is capped with a compound not having any other active hydrogen atom and oxyethylene units are contained in an amount of 30 wt % or above, and which exhibits a density of 8 to 70 kg/m.sup.3, an open cell content of 98% or above, a hardness of 0.1 to 2.0 kgf/cm.sup.2 in state compressed by 10 to 40% in both the parallel direction and the rectangular direction to the direction of expansion, and a hardness different by +20% to -20% from that found in a state compressed by 10% in both the parallel direction and the rectangular direction to the direction of expansion in a state compressed by 40% therein, is excellent in water absorption rate, water absorption capacity and water retention, and is improved in the reception of inserted flower.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.