Polymer/polyol compositions, processes for making same and processes for making polyurethane products therefrom
AssigneeUnion Carbide Corporation
InventorNaresh Ramanlal Shah
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Abstract
Novel improved polymer/polyol compositions made by polymerizing, in the absence of any alkyl mercaptan, one or more ethylenically unsaturated monomer substantially free of bound halogen in situ in a blend of about 55 to about 95 wt. % of a polyol having a number average molecular weight not greater than about 4000 and from about 45 to about 5 wt. % of a polyol having a number average molecular weight of not less than about 5000 to form a highly stable dispersion of small polymer particles in said blend. The novel compositions are highly useful in the production of polyurethane products.
Claims26
In a polymer/polyol composition which is convertible by reaction with a polyisocyanate to a polyurethane product wherein said polymer/polyol composition is normally liquid at the temperature at which said composition is converted to said polyurethane product and wherein the polymer of said polymer/polyol composition is formed in situ in a polyol blend containing a polyol having a relatively low theoretical number average molecular weight by polymerizing in the blend one or more polymerizable ethylenically unsaturated monomers, the improvement comprising employing as the blend a polyol blend comprising about 55 to about 95 wt.% of a polyol having a theoretical number average molecular weight not greater than about 4000 and from about 45 to about 5 wt.% of a polyol having a theoretical number average molecular weight of not less than about 5000, in which blend said polymer is stably dispersed as small particles, said polymer being formed in the absence of any alkyl mercaptan and said monomers being substantially free of chemically bound halogen.
In a process for producing a liquid polymer/polyol composition which is convertible by reaction with a polyisocyanate to a polyurethane product wherein said polymer/polyol composition is normally liquid at the temperature at which said composition is converted to said polyurethane product and wherein said polymer of said polymer/polyol composition is formed in situ in a polyol blend which contains a polyol having a relatively low theoretical number average molecular weight by polymerizing in the blend one or more polymerizable ethylenically unsaturated monomers, the improvement comprising employing as the blend a polyol blend comprising about 55 to 95 wt.% of a polyol having a theoretical number average molecular weight not greater than about 4000 and from about 45 to about 5 wt.% of a polyol having a theoretical number average molecular weight of not less than about 5000, in which blend said polymer is formed in situ in the absence of any alkyl mercaptan from one or more of said monomers, said monomers being substantially free of bound halogen, and said polymer is stably dispersed in said blend as small particles.
Dependencies are inferred from the claim text.