Polymer/polyol composition, processes for making the same and polyurethane therefrom
AssigneeSanyo Chemical Industries, Ltd.
InventorsIsao Ishikawa, Tsuyoshi Tomosada
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Abstract
Polymer/polyol compositions, obtained by polymerizing one or more ethylenically unsaturated monomers in situ in a blend of a polyether polyol and a polyamine, are of suitably high reactivity. The polymer/polyol compositions provide, by reaction with a polyisocyanate, polyurethanes having improved moldability and physical properties along with self-mold-release characteristics, and are particularly suitable for producing polyurethane by RIM process.
Claims20
A polymer/polyol composition, which is convertible by reaction with a polyisocyanate to a polyurethane, wherein the polymer of said composition is formed by polymerizing one or more ethylenically unsaturated monomers in situ in a blend of at least one polyol and at least one polyamine;
- said polyol comprising a polyol having a hydroxyl number of 15-100, selected from the group consisting of polyether polyols, polyester polyols, urethane-modified polyols, polyols containing polymerizable unsaturated bonds in the molecule, and polymer/polyols previously prepared in situ in any of these polyols;
- said polyamine being selected from the group consisting of aromatic polyamines, aliphatic polyamines, alicyclic polyamines, heterocyclic polyamines, araliphatic polyamines, polyamide polyamines, polyether polyamines and dicyandiamide;
- the amount of said polyamine being 0.5-60 parts by weight per 100 parts by weight of said polyol;
- and said polymer being present in an amount of 1-70% based on the weight of said composition.
A process for producing a polymer/polyol composition, convertible by reaction with a polyisocyanate to a polyurethane, which comprises polymerizing one or more ethylenically unsaturated monomers in situ in a blend of at least one polyol and at least one polyamine;
- said polyol comprising a polyol having a hydroxyl number of 15-100;
- said polyamine being selected from the group consisting of aromatic polyamines, aliphatic polyamines, alicyclic polyamines, heterocyclic polyamines, araliphatic polyamines, polyamide polyamines, polyether polyamines and dicyandiamide;
- said polyamine being used in an amount of 0.5-60 parts by weight per 100 parts by weight of said polyol;
- and said monomers being used in an amount of 1-50 parts by weight per 100 parts by weight of the total of said polyol and said polyamine.
Dependencies are inferred from the claim text.