Other

Silkroad C&t

Silkroad C&t Co., Ltd.

Park, Kwang Young

Kwang Young Park

Jung Sun Kim

Dae Jin Kim

Ju Hwan Kim

Min Jae Lee

Cheol Yong Cha

Young Gil Ju

Bo Seung Kim

Myung Wook Jang

Oh Jin Kim

Young Gook Choi

A method of preparing an admixture for a plasterboard is disclosed. An admixture prepared by the method and a composition for forming a plasterboard containing the admixture are also disclosed. The method includes sulfonation of polystyrene using sulfuric acid to give an admixture including a sulfonated polystyrene (SPS)-based compound of formula 1 below. The admixture enables regulation of properties of a plasterboard, such as foam size, flowability, and setting time, by regulating a degree of sulfonation (DS) of the SPS-based compound:

Preparation method for admixture for plasterboard, admixture prepared thereby, and composition for forming plasterboard comprising same

A saddle for bicycles has a vertical swiveling unit and a horizontal sliding unit so that the saddle is moved vertically and horizontally, thus providing a sensation similar to riding a horse. The saddle includes a seat sliding unit providing on a lower surface of a seat to move the seat forward and backward, as a user moves forward and backward while sitting on the seat. A guide part with a predetermined length supports the seat sliding unit to guide a horizontal movement of the seat sliding unit, with a free end provided at a rear end of the guide part to allow the guide part to be swiveled vertically. A swiveling spring is provided at a front end of the guide part to provide a vertical elastic force to the guide part. A support part supports the swiveling spring and couples the support part to the seat support frame.

Saddle for bicycles

Growing community of inventors

Yongin-si, South Korea

Kwang Young Park