Embedding mass based upon fast-reacting polyurethane casting resin
US4433128A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 22, 1982 |
| Grant date | Feb 21, 1984 |
| Priority date | — |
| Expiry date | Nov 22, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/6677
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Embedding masses are disclosed on the basis of fast-reacting polyurethane casting resins, which are obtained through reaction of an aromatic polyisocyanate with a mixture of castor oil and trimethylolpropane into an NCO-group-displaying pre-adduct and polymerization of this pre-adduct with a polypropyleneglycol or a mixture of polypropyleneglycol and trimethylolpropane in the presence of small amounts of a catalyst mixture composed of dialkyl tin dicarboxylate and tertiary amine. The polyurethane casting resins can harden in seconds-fast reaction, and are therefore preferably suitable for a continuous embedding of membranes in automatic machines, particularly of membranes for artificial organs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.