Abstract: A graphene dispersion includes a graphene and a polyol compound selected from the group consisting of an aromatic polyol represented by Formula (I), and a modified aromatic polyol made by subjecting the aromatic polyol represented by Formula (I) and an epoxidized vegetable oil to a ring opening reaction, wherein p and q are independently integers ranging from 1 to 20. A method for preparing the graphene dispersion, a composition for preparing a polyurethane composite material, and a polyurethane composite material made from the composition are also disclosed.

Abstract: A process for producing a polyester polyol includes the steps of: (a) preparing a diol composition which includes a C2-C9 short-chain diol component and a diol monomeric component of Formula (I) defined herein in a weight ratio of the C2-C9 short-chain diol component to the diol monomeric component of Formula (I) of larger than 0 and less than 1.6, (b) preparing a dicarbonyl composition which includes one selected from the group consisting of a dicarboxylic acid component, a dicarboxylic anhydride component, and a combination thereof, and (c) subjecting the diol composition and the dicarbonyl composition to a polycondensation reaction.

Abstract: A process for producing a low viscosity polyester polyol includes the steps of: (a) preparing a mixture which includes an aromatic diacid-based compound, an alkali metal ion-containing compound, and an aliphatic diol compound; and (b) subjecting the mixture to a reaction, wherein the alkali metal ion-containing compound has an alkali metal ion content of from 10 ppm to 12000 ppm based on a total weight of the mixture.

Abstract: The present disclosure provides a lightweight tile. The lightweight tile has a tile body and a lacquer layer overlaying on the tile body. The tile body is composed of a rigid foamed resin having a plurality of void cells. The density of the rigid foamed resin is 0.2 to 0.45 g/cm3. The lightweight tile provided in the present disclosure is less dense than the conventional ceramic tiles. In addition, the heat insulation and sound insulation of the lightweight tile are excellent.

Abstract: A method for producing a polyester includes: a) preparing a first monomer represented by Formula (1) for example—bis(?-hydroxyethyl) terephthalate (BHET); and b) preparing a second monomer represented by Formula (2) represented by Formula (2)—2-(2-hydroxyethoxy)ethyl 2-hydroxyethyl terephthalate (BHEET). The prepared first and second monomer are then mixed to form a mixture, and then the mixture is subjected to a pre-polymerization reaction at a first temperature not higher than 230° C. to form a prepolymer while a glycol compound represented by Formula (3) wherein R independently represents hydrogen, a C1-C6 linear or branched alkyl group, or phenyl; is continuously removed by distillation. The method also includes subjecting the prepolymer to a polymerization reaction at a second temperature higher than the first temperature to obtain the polyester.

Abstract: A method for producing a polyester includes: a) subjecting a mixture which includes a major amount of a first monomer and a minor amount of a second monomer to a pre-polymerization reaction at a first temperature for a period of reaction time such that a prepolymer is formed while a glycol compound is continuously removed by distillation; and b) subjecting the prepolymer to a polymerization reaction at a second temperature higher than the first temperature to obtain the polyester.

Abstract: The present disclosure provides a method of manufacturing bis(2-hydroxyethyl) cyclohexane-1,4-dicarboxylate (BHCD) and derivatives thereof. The method includes the following steps. A first reactant including bis-hydroxyethyl terephthalate (BHET) is provided. 2-(2-hydroxyethoxy)ethyl 2-hydroxyethyl terephthalate (BHEET) is added to the first reactant including BHET to form a second reactant. The second reactant is hydrogenated.

Abstract: The present disclosure provides a method of manufacturing bis(2-hydroxyethyl) cyclohexane-1,4-dicarboxylate (BHCD) and derivatives thereof. The method includes the following steps. A first reactant including bis-hydroxyethyl terephthalate (BHET) is provided. 2-(2-hydroxyethoxy)ethyl 2-hydroxyethyl terephthalate (BHEET) is added to the first reactant including BHET to form a second reactant. The second reactant is hydrogenated.

Abstract: A computer system with power source control and a power source control method are presented. The computer system at least includes a first storage unit and a second storage unit, and the first storage unit stores a system program required by the computer system in basic operation. A switch is disposed on a power supply path between a power supply module and the second storage unit, such that the power supply module provides an electric power for the second storage unit to operate through the switch. When the second storage unit is in an idle state, the switch is used to cut off the power supply to the second storage unit, so as to effectively reduce the power consumption of the computer system.

Abstract: A computer system with power source control and a power source control method are presented. The computer system at least includes a first storage unit and a second storage unit, and the first storage unit stores a system program required by the computer system in basic operation. A switch is disposed on a power supply path between a power supply module and the second storage unit, such that the power supply module provides an electric power for the second storage unit to operate through the switch. When the second storage unit is in an idle state, the switch is used to cut off the power supply to the second storage unit, so as to effectively reduce the power consumption of the computer system.