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OwnerShiping Wang, Yun-Siung Tony Yeh +2inventors
InventorsShiping Wang, Yun-Siung Tony Yeh, Randell Wenig, Weicheong Wong
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The invention disclosed herein relates to an improved process for making elastomeric polyisoprene articles. In particular, the process of the invention is a system which produces synthetic polyisoprene articles exhibiting tensile strength properties similar to that of solvent-based processes using natural rubber latex. The process comprises an accelerator composition at the pre-cure stage comprising a dithiocarbamate, a thiazole and a guanidine compound. In a preferred embodiment, the accelerator composition comprises zinc diethyldithiocarbamate (ZDEC), zinc 2-mercaptobenzothiazole (ZMBT) and diphenyl guanidine (DPG), in conjunction with a stabilizer, such as sodium caseinate. The invention also includes an elastomeric polyisoprene product made by the process, such as a surgeon's glove.
A process of making an elastomeric polyisoprene article comprising the steps of:
A synthetic elastomeric polyisoprene article having a tensile of greater than about 3000 psi as measured in accordance with ASTM D412, said article being prepared by a process comprising the steps of:
A polyisoprene latex composition comprising:
An accelerator composition for use in a process for making elastomeric polyisoprene articles, said accelerator composition consisting essentially of:
A glove composed of polyisoprene and having a tensile strength of greater than 3000 psi as measured in accordance with ASTM D412, said glove being prepared from a polyisoprene latex composition comprising a dithiocarbamate compound, a thiazole compound, and a guanidine compound.
Dependencies are inferred from the claim text.