Abstract: The present invention relates to a thermosensitive and biocompatible poly(organophosphazenes) represented by Formula 1, and a preparation method thereof: wherein x is an integer of 3, 4, 7, 12 or 16; R is methyl, ethyl or benzyl group; R1 is selected from the group consisting of CH2CH(CH3)2, CH2C6H5, CH(CH3)CH2CH3 and CH3; R2 is selected from the group consisting of CH2COOR, CH2CH2COOR, CH2CH(CH3)2 and CH(CH3)CH2CH3; R3 and R4 are independently selected from the group consisting of CH2COOR, CH2CH2COOR and H, wherein said R is the same as defined above; a, b and c are equal to 1, respectively; and d and e are 0 or 1.

Abstract: The present invention relates to a thermosensitive and biocompatible poly(organophosphazenes) represented by Formula 1, and a preparation method thereof: wherein R is a methyl or ethyl group; R? is selected from the group consisting of COOR, CH2COOR, CH2CH2COOR, CH2CH(CH3)2, CH2C6H5, CH(CH3)CH2CH3 and CH3; R? is selected from the group consisting of CH2COOR, CH2CH2COOR, CH2CH(CH3)2, CH2C6H5, CH(CH3)CH2CH3 and CH3; R?? is a group selected from the group consisting of CH2COOR, CH2CH2COOR and H, wherein R is the same as defined above; n is a number between from 30 to 100; x is a number selected from the integers of 3, 4, 7, 12 and 16; y is a number between from 0.5 to 1.5; a equals to 1; and b and c equal to 0 or 1.

Abstract: A cooling system and method for a paper coating device, especially for cooling a coating blade of the coating device and a coating color to be coated on paper web, whereby a streaking and/or bleeding phenomena caused by accumulation of the coating color at the end of the coating blade are effectively inhibited. The cooling system comprises a cooling means equipped at a back surface of the coating blade, interconnecting hoses for communicating coolant to the cooling means, a circulating unit, and a heat-exchanging unit.