Abstract: A method of preparing an aqueous dispersion of an ethylene-carboxylic acid copolymer according to exemplary embodiments of the present invention includes: mixing 30% by weight or more of an ethylene-(meth)acrylic acid copolymer, a basic compound, and water to form a mixed solution; and adding an inorganic salt compound to the mixed solution. Therefore, the aqueous dispersion of the ethylene-carboxylic acid copolymer may be effectively dispersed.
Type:
Grant
Filed:
October 6, 2020
Date of Patent:
November 15, 2022
Assignees:
SK Innovation Co., Ltd., SK Global Chemical Co., Ltd., SK GC Americas Inc.
Inventors:
Hai Jin Shin, Doh Yeon Park, Yong Zheng, Hae Woong Park
Abstract: The invention includes a system and method for making injection molded dental appliance apparatuses having an injector module removably attached to a dental flask, a press and a controlled compression apparatus, wherein the press and compression apparatus introduce pressure into the dental flask and the injector module, which pressure may or may not be maintained during curing of the appliance. The invention also includes a system for dispensing dental appliance chemicals having at least one chemical dispensing apparatus and a mixing container; whereby a separate dispensing apparatus is used for each chemical and the chemicals are dispensed and mixed in the same container.
Type:
Grant
Filed:
February 19, 1998
Date of Patent:
February 13, 2001
Assignee:
GC America, Inc.
Inventors:
Lothar Petkow, Wolf Parisius, A. A. Robertson