Patent ID: 8501886
Filing Date: 2013-08-06
Classification: C08F,C08L,C09J

Abstract:
1. A two part polymerizable composition comprising in one part, an organoboron compound comprising an trialkylboron amine complex capable of forming free radical generating species and in the second part, one or more compounds capable of free radical polymerization and a cure accelerator comprising about 0.1 to about 4.0 percent by weight based on the weight of the two part polymerizable composition of at least one compound containing at least one alkyl ether of hydroquinone and the cure accelerator further comprising about 0.1 to about 4.0 percent by weight of a peroxide-containing compound selected from the group consisting of dialkyl peroxides, diaryl peroxides, diacyl peroxides, benzoyl peroxide and t-butylperbenzoate that reacts with the at least one compound containing at least one alkyl ether of hydroquinone to form free radicals; wherein the molar ratio of peroxide-containing compound to the at least one compound containing at least one alkyl ether of hydroquinone is one or less; and a decomplexing agent capable of decomplexing the organoboron amine complex upon containing of the two parts, the cure accelerator is located only in the second part; the parts of the polymerizable composition prior to contacting of the two parts exhibit a viscosity increase of less than 150 percent over 30 days when stored at 40° C. or less and the polymerizable composition exhibits a lap shear strength according to ASTM 03165-91 of 50 psi or greater 2 hours after contacting and application to a polypropylene substrate; wherein: the organoboron compound further comprises a compound having a primary amine and one or more hydrogen accepting groups, wherein the one or more hydrogen bond accepting groups is selected from ether or polyether, and there are at least one two carbon atoms between primary amine and the hydrogen bond accepting groups, wherein the compound having a primary amine and one or more hydrogen accepting groups is selected from the group consisting of methoxypropylamine, methoxybutylamine, methoxyethylamine, ethoxypropylamine, propoxypropylamine, and amine terminated polyalkylene ethers, and the compounds capable of free radical polymerization comprise acrylate or methacrylate monomers, polymers or a mixture thereof.