METHOD FOR PRODUCING WATER-BASED POLYESTER RESIN, WATER-BASED POLYESTER RESIN, AND WATER-BASED COATING COMPOSITION
A method for producing a water-based polyester resin includes a first step and a second step. The first step includes causing an ester formation reaction and a depolymerization reaction using a recycled polyester, a polycarboxylic acid component including a polycarboxylic acid residue and excluding...
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| creator | SAKAKIBARA, Teru KOMABIKI, Shinya |
| description | A method for producing a water-based polyester resin includes a first step and a second step. The first step includes causing an ester formation reaction and a depolymerization reaction using a recycled polyester, a polycarboxylic acid component including a polycarboxylic acid residue and excluding terephthalic acid, and a polyalcohol component. The second step includes causing a polycondensation reaction by reducing pressure. The first step includes using: the recycled polyester to such an amount that makes proportion of a terephthalic acid residue equal to or greater than 20% by mass and equal to or less than 72% by mass; and a metal-sulfonate-group-containing polycarboxylic acid compound to such an amount that makes proportion of the metal-sulfonate-group-containing polycarboxylic acid residue equal to or greater than 5% by mass and equal to or less than 32% by mass. The resin thus produced has an acid value equal to or less than 10 mgKOH/g. |
| format | Patent |
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The first step includes causing an ester formation reaction and a depolymerization reaction using a recycled polyester, a polycarboxylic acid component including a polycarboxylic acid residue and excluding terephthalic acid, and a polyalcohol component. The second step includes causing a polycondensation reaction by reducing pressure. The first step includes using: the recycled polyester to such an amount that makes proportion of a terephthalic acid residue equal to or greater than 20% by mass and equal to or less than 72% by mass; and a metal-sulfonate-group-containing polycarboxylic acid compound to such an amount that makes proportion of the metal-sulfonate-group-containing polycarboxylic acid residue equal to or greater than 5% by mass and equal to or less than 32% by mass. 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The first step includes causing an ester formation reaction and a depolymerization reaction using a recycled polyester, a polycarboxylic acid component including a polycarboxylic acid residue and excluding terephthalic acid, and a polyalcohol component. The second step includes causing a polycondensation reaction by reducing pressure. The first step includes using: the recycled polyester to such an amount that makes proportion of a terephthalic acid residue equal to or greater than 20% by mass and equal to or less than 72% by mass; and a metal-sulfonate-group-containing polycarboxylic acid compound to such an amount that makes proportion of the metal-sulfonate-group-containing polycarboxylic acid residue equal to or greater than 5% by mass and equal to or less than 32% by mass. 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The first step includes causing an ester formation reaction and a depolymerization reaction using a recycled polyester, a polycarboxylic acid component including a polycarboxylic acid residue and excluding terephthalic acid, and a polyalcohol component. The second step includes causing a polycondensation reaction by reducing pressure. The first step includes using: the recycled polyester to such an amount that makes proportion of a terephthalic acid residue equal to or greater than 20% by mass and equal to or less than 72% by mass; and a metal-sulfonate-group-containing polycarboxylic acid compound to such an amount that makes proportion of the metal-sulfonate-group-containing polycarboxylic acid residue equal to or greater than 5% by mass and equal to or less than 32% by mass. The resin thus produced has an acid value equal to or less than 10 mgKOH/g.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON CORRECTING FLUIDS DYES FILLING PASTES INKS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF MATERIALS THEREFOR WOODSTAINS |
| title | METHOD FOR PRODUCING WATER-BASED POLYESTER RESIN, WATER-BASED POLYESTER RESIN, AND WATER-BASED COATING COMPOSITION |
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