Polyurethane composition having easy-reentry property
US4029626A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 24, 1975 |
| Grant date | Jun 14, 1977 |
| Priority date | — |
| Expiry date | Nov 24, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2929
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention is directed to liquid polyurethane compositions made from a prepolymer and a curing solution. The prepolymer is made from organic diisocyanate, aliphatic triol, and liquid organic plasticizer material compatible with the composition and having an NCO content of about 1.2-2.5%. The prepolymer is cured with a solution composition of urethane curing agent, liquid organic plasticizer compatible with the cured composition, and an organo-metallic catalyst effective at ambient temperature. The cured polyurethane composition is a resilient solid which is waterproof and crumbles under shearing force applied to the surface or interior of the solid to permit easy breakaway or reentry into a cable splice or a surface which is encapsulated, embedded or coated with said solid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.