KR920701287A - Thermoplastic Graft Copolymer and Its Manufacturing Method - Google Patents

Abstract

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Description

Thermoplastic Graft Copolymer and Its Manufacturing Method

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Claims (13)

Monosaccharide or polysaccharide and oxymethylene unit having a functional group selected from the group consisting of hydroxyl group, carboxyl group, amino group and amido group Polyacetal consisting of a repetition of the copolymer is a copolymer reacted with each other through the functional group, a polyacetal unit constituting the side chain is a copolymer graft bonded to a monosaccharide unit or a polysaccharide unit constituting the main chain, the viscosity number is 0.1 ~ 10 (G / g) and a thermoplastic graft copolymer having a melting point of 150 to 175 캜. The thermoplastic graft copolymer of claim 1, wherein the polysaccharide unit is derived from cellulose, methylol cellulose, cellulose esters, cellulose ethers, or amylose. The thermoplastic graft copolymer of claim 2, wherein the cellulose ester is acetyl cellulose, nitro cellulose, propionyl cellulose, or butyryl cellulose. The thermoplastic graft copolymer of claim 2, wherein the cellulose ester is methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, carboxyethyl cellulose or benzyl cellulose. The thermoplastic graft copolymer of claim 1, wherein the content of the polysaccharide unit is 1 to 60% by weight based on the total weight of the graft copolymer. The thermoplastic graft copolymer of claim 1, wherein the viscosity number is 0.5 to 5 (dl / g). The thermoplastic according to claim 1, wherein the formaldehyde is homopolymerized using an anionic polymerization catalyst in the presence of a monosaccharide or a polysaccharide having both a functional group selected from the group consisting of a hydroxyl group, a carboxyl group, an amino group and an amido group or both. Method for preparing the graft copolymer. 8. The process for producing a thermoplastic graft copolymer according to claim 7, wherein the polysaccharide is cellulose, methylol cellulose, cellulose acetate, cellulose ether or amylose. The method for producing a thermoplastic graft copolymer according to claim 8, wherein the cellulose ester is acetyl cellulose, nitro cellulose, propionyl cellulose, or butyryl cellulose. The method for producing a thermoplastic graft copolymer according to claim 8, wherein the cellulose ester is methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, carboxyethyl cellulose or benzyl cellulose. 8. A process according to claim 7, wherein homopolymerization is carried out in an organic medium. The process for producing a thermoplastic graft copolymer according to claim 6, wherein the anionic polymerization catalyst is a quaternary ammonium salt. The method for producing a thermoplastic graft copolymer according to claim 6, wherein the amount of the anionic polymerization catalyst used is 0.0005 to 3 parts by weight based on 100 parts by weight of formaldehyde. ※ Note: The disclosure is based on the initial application.