C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
402/2
C08J 3/24 (2006.01) B27L 11/00 (2006.01) C08K 3/00 (2006.01) C08K 5/17 (2006.01)
Patent
CA 1065995
ABSTRACT OF THE DISCLOSURE A catalyst cured polymer is obtained by adding by weight, 100 parts of an amine curable polymer or prepolymer selected from the group consisting of (a) urethanes containing free isocyanate groups, epoxy resins, polymers containing acid halide and haloformate groups, and polymers containing anhydride groups which on reaction with diamines, yield amide-acide linkages, or (b) halogen containing hydrocarbon polymers, chlorosulfonated polymers and organo-polysiloxanes; an amine containing curing agent in an amount of 0.8 to 1.2 equivalents based upon the free active groups of the amine curable polymer or prepolymer of group (a), or of 0.0005 to about 0.05 equiva- lents based upon the active groups of the amine curable polymer or prepolymer of group (b), the curing agent selected from the group consisting of a complex of 4,4'-methylene dianiline and a salt, the salt selected from the group consisting of sodium chloride, sodium bromide, sodium iodide, sodium nitrate, lithium chloride, lithium bromide, lithium iodide, lithium nitrate and sodium cyanide, and a complex of racemic 2,3-di(4-amino- phenyl) butane and a salt selected from the group consisting of sodium chloride, potassium bromide, potassium iodide, rubidium chloride, rubidium bromide, rubidium iodide, cesium chloride, cesium bromide and cesium iodide, the ratio of the dianiline or butane to the salt in the complex being about 3 moles per 1 mole; and from 0.1 to about 35 parts of a curing agent catalyst selected from the group consisting of oleic acid, benzaldehyde, adiponitrile, acetic anhydride, polydimethyl- siloxane and diethylsulfate, and curing the polymer or pre- polymer composition. The use of the above selected catalyst causes the polymerization to proceed rapidly at reasonably low temperatures and at temperatures lower than normally other- wise possible. The preferred polyurethanes can be used for numerous applications such as automotive parts, bumpers, commercial and passenger tires, shoe soles, wearing apparel, roller wheels and the like.
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