| 摘要 |
A one component isocyanate prepolymer mixture for formulating a polyurethane product in a single step process, with monomeric methylene diphenyl diisocyanate (MDI) content in the mixture not exceeding 3%, preferably less than 2%, more preferably less than 1% of the total weight. The mixture contains monofunctional alcohol, an isocyanate component or isocyanate mixture component, propellant, catalyst, stabiliser, and one or more polyols. The monofunctional alcohol constitutes ethylene glycol ethers or propylene glycol ethers. A method for formulating a one component polyurethane foam on the basis of the mixture is disclosed. |
| 主权项 |
1. A one component isocyanate prepolymer mixture for formulating a polyurethane product in a single step process, with monomeric methylene diphenyl diisocyanate (MDI) content in the mixture not exceeding 3%, preferably less than 2%, more preferably less than 1% of the total weight, comprising:
a monofunctional alcohol, an isocyanate component or isocyanate mixture component, a propellant, a catalyst, a stabiliser, and one or more polyols, wherein the monofunctional alcohol includes ethylene glycol ethers or propylene glycol, preferably taken from a group including 2-methoxyethanol, 2-ethoxyethanol, 2-propoxyethanol, 2-isopropoxyethanol, 2-butoxyethanol, 2-phenoxyethanol, 2-benzyloxyethanol, 2-(2-methoxyethoxy)ethanol, 2-(2-ethoxyethoxy)etahnol, 2-(2-butoxyetoxy)ethanol, 1-methoxy-2-propanol, 1-ethoxy-2-propanol, 1-propoxy-2-propanol, 5-methyl-4,7-dioxa-2-heptanol, 5-methyl-4,7-dioxa-2-decanol, 2-(2-butoxymethyletoxy)methyletoxy)propanol, 1-butoxy-2-propanol, 1-(2-butoxy-1-propoxy)2-propanol, and [2-(2-methoxypropoxy)propoxy]propanol. |
