Abstract:
A specific combination of two different polyolefin clarifying and nucleating agents, namely 3,4-dimethyldibenzylidene sorbitol and p-methyldibenzylidene sorbitol is provided. Such a combination surprisingly provides improved clarification and crystallization temperatures to polypropylene articles and formulations, better than bis-p-methyldibenzylidene sorbitol alone and equivalent or better than 3,4-dimethyldibenzylidene sorbitol. Such a combination of compounds thus permits the utilization of a new additive for the purpose of modifying polyolefin properties, such as polypropylene clarification and nucleation. The inventive combination may be introduced within any polyolefin composition, again preferably polypropylene, which may then be molded into any shape or form. A method of producing a polyolefin plastic utilizing the inventive combination of compounds is also provided.
Abstract:
Specific low density polyethylene articles that exhibit improved physical characteristics and other benefits over previously made articles produced by less efficient means are provided. Such articles require the presence of saturated or unsaturated bicyclic dicarboxylate nucleating agents that impart increased crystallization temperatures, permit lower manufacturing cycle times, and, most importantly, cause a drastic reduction in warpage at quick cooling times during production. These resultant articles thus can be produced more efficiently with reliable low-warpage characteristics.
Abstract:
A specific combination of two different polyolefin clarifying and nucleating agents, namely 3,4-dimethyldibenzylidene sorbitol and p-methyldibenzylidene sorbitol is provided. Such a combination surprisingly provides improved clarification and crystallization temperatures to polypropylene articles and formulations, better than bis-p-methyldibenzylidene sorbitol alone and equivalent or better than 3,4-dimethyldibenzylidene sorbitol. Such a combination of compounds thus permits the utilization of a new additive for the purpose of modifying polyolefin properties, such as polypropylene clarification and nucleation. The inventive combination may be introduced within any polyolefin composition, again preferably polypropylene, which may then be molded into any shape or form. A method of producing a polyolefin plastic utilizing the inventive combination of compounds is also provided.
Abstract:
Specific low density polyethylene articles that exhibit improved physical characteristics and other benefits over previously made articles produced by less efficient means are provided. Such articles require the presence of saturated or unsaturated bicyclic dicarboxylate nucleating agents that impart increased crystallization temperatures, permit lower manufacturing cycle times, and, most importantly, cause a drastic reduction in warpage at quick cooling times during production. These resultant articles thus can be produced more efficiently with reliable low-warpage characteristics.