Abstract:
A compound of the formula: ##STR1## where each of the R groups are the same and include a C.sub.1 to C.sub.4 alkyl and R' is either ##STR2## where x is a number from 2 to 10 is disclosed. The use of the prescribed component as a light, heat and oxidation stabilizer in polyurea, polyurethane and polyurethane-urea elastomers, as well as epoxy systems, is also disclosed.
Abstract:
Polyoxyalkylene diamine reaction products which contain as the principle reaction component, a diamine having the formula: ##STR1## wherein R' independently represents hydrogen or methyl and x is a number having an average value of at least 1 to about 60 and a diisocyanate of the formula: ##STR2## The products of the invention are obtained by reacting an excess of polyoxyalkylene diamine with a diisocyanate in the presence of a polar solvent and have the following general structures: ##STR3## where B is alkyl group from diisocyanates, and R' has the same meaning as above.These products are further used to prepare coatings with improved properties by reacting said amine products with isocyanates prepolymers and epoxy material.
Abstract:
Polyoxyalkylene diamine reaction products which contain as the principle reaction component, a diamine having the formula: ##STR1## wherein R' independently represents hydrogen or methyl and x is a number having an average value of at least 1 to about 60 and a diisocyanate of the formula: ##STR2## The products of the invention are obtained by reacting an excess of polyoxyalkylene diamine with a diisocyanate in the presence of a polar solvent and have the following general structures: ##STR3## where B is alkyl group from diisocyanates, and R' has the same meaning as above.These products are further used to prepare coatings with improved properties by reacting said amine products with isocyanates prepolymers and epoxy material.
Abstract:
A polyurethane coating composition is disclosed which may be heat cured under relatively mild conditions. The composition comprises a chemically blocked isocyanate and a curing agent comprising an N,N'-dialkyl substituted polyoxyalkylene amine.
Abstract:
Diisocyanate and polyoxyalkylene diamine reaction products which contain as the principle reaction component, a diamine having the formula: ##STR1## wherein R' independently represents hydrogen or methyl and x is a number having an average value of at least 1 to about 60 and a diisocyanate of the formula: ##STR2## The products of the invention are obtained by reacting a polyoxyalkylene diamine with an excess of diisocyanate in the presence of a polar solvent to obtain products with the following general structures: ##STR3## where B is alkyl group from diisocyanates. These products and the corresponding blocked isocyanate prepolymer are further used to prepare coatings by reaction with polyoxyalkylene polyamine.
Abstract:
A process in which a dialdehyde is reacted with a polyoxyalkylene glycol to form a dialdehyde glycol condensate which is alkoxylated with propylene oxide, butylene oxide or mixtures thereof and the resulting product is then catalytically aminated to provide, for example, a tetramine is disclosed. These compounds are useful as curing agents for epoxy resins and for reaction with isocyanates to prepare polyurea elastomers and to manufacture articles, such as automotive body panels by reaction injection molding.
Abstract:
A process in which a di-trimethylol alkane initiator is oxyalkylated to form an alkylene oxide adduct which is then catalytically aminated to provide, for example, a tetramine. These compounds are useful for preparing polyurethane products and as curing agents for epoxy resins.
Abstract:
The present invention provides a method for reducing metal ions (for example, silver ions) and stably dispersing metal nanoparticles by nanosilicate platelets. An organic dispersant, nanosilicate platelets and a metal ionic solution are mixed to perform a reductive reaction, wherein the organic dispersant is tri-sodium citrate dihydrate (SCD), chitosan or polyvinyl pyrrolidone (PVP), to produce a mixture of stably dispersed metal nanoparticles.
Abstract:
A phosphorous flame retardant including nanosilicate platelets (NSP) is made by first reacting hexachlorotriphosphazene (HCP) with poly(oxyalkylene)amine, then mixing the HCP product with nano silicate platelets (NSP) to obtain the phosphorous flame retardant including NSP. The phosphorous flame retardant can be further applied to an epoxy resin as a curing agent.
Abstract:
Polymeric polyamine is produced by polymerizing polyoxyalkylene-amine and a linker. The polyoxyalkylene-amine has a structural formula H2N—R—NH2, wherein R is selected from the group consisting of dianhydride, diacid, epoxy, diisocyanate and poly(styrene-co-maleic anhydride) copolymers (SMA). The linker can be anhydride, carboxylic acid, epoxy, isocyanate or poly(styrene-co-maleic anhydride) copolymers (SMA). The polymeric polyamine so produced can be used as a stabilizer or dispersant of the Ag nanoparticles.