| 摘要 |
Reaction injection molded polyurethane elastomers reinforced with inert fillers are made by reacting two streams with one another, one stream containing polyisocyanate and the other stream containing at least one active hydrogen-containing material, wherein all the inert filler is placed in the isocyanate-containing stream before mixing and reaction with the active hydrogen-containing stream. The products exhibit improved tensile strength and thermal dimensional stability when compared with conventional products in which the filler is present in the active hydrogen-containing component The fillers may be chopped or milled glass fibres, chopped or milled carpet fibres and/or other mineral fibres. |
