Low-density RRIM using mineral fiber filler
AssigneeBASF SE
InventorBari W. Brown
Life of this patent
Estimating the term…
Abstract
The invention pertains to a low weight, low density rigid polyurethane-polyurea reinforced reaction injection molded (RRIM) part having wollastonite reinforcing fibers dispersed throughout a matrix made by reacting polyisocyanates with a resin containing hydroxy group tertiary amine polyether polyols, a water as a blowing agent, and optionally surfactants, chain extenders, and urethane promoting catalysts. The low density RRIM part using wollastonite and the tertiary amine polyether polyols is a low cost alternative to glass fiber reinforced low density parts, and the part exhibits good mechanical properties and quick demold times.
Claims13
A process of making a low density RRIM composite having a specific gravity of less than 1.0 and having wollastonite fibers dispersed throughout a matrix, comprising reacting:
- A) an "A side" isocyanate component comprising one or more polyisocyanates, reacted with,
- B) a "B side" component comprising a polyoxyalkylene polyether polyol composition comprising hydroxyl functional tertiary amine polyether polyols prepared by oxyalkylating an amine with ethylene oxide, propylene oxide, tetrahydrofuran, or mixtures thereof, a blowing agent comprising water, a polyurethane/isocyanurate-promoting catalyst, and optionally a chain extender, a surfactant, and stabilizers.
Dependencies are inferred from the claim text.