Process for the manufacture of polyesters
    3.
    发明公开

    公开(公告)号:US20240141102A1

    公开(公告)日:2024-05-02

    申请号:US18376157

    申请日:2023-10-03

    IPC分类号: C08G63/688 C08J3/12 C08J11/16

    摘要: Disclosed is a process for the preparation of polyesters, comprising the following steps and characterized by the following measures:



    a) suspending polyethylene terephthalate waste in ethylene glycol and/or in 1,2-propylene glycol containing a transesterification catalyst,
    b) heating the reaction mixture to depolymerize the polyethylene terephthalate waste for a time sufficient to decompose the polyethylene terephthalate into monomers and into oligomers,
    c) addition of end group forming monomers in the form of polyalkylene glycol monoalkyl ethers, fatty alcohols, fatty amines, fatty acids or esters thereof or mixtures of two or more thereof, and/or sulfo(poly)alkylene glycols and/or sulfoaryl carboxylic acids or esters thereof,
    d) addition of sulfoarylene dicarboxylic acids or polyester-forming derivatives thereof,
    e) optionally adding aliphatic diols, cycloaliphatic diols, organic dicarboxylic acids, their polyester-forming derivatives, crosslinkers or mixtures of two or more thereof,
    f) heating the reaction mixture while distilling off ethylene glycol, optionally 1,2-propylene glycol and further compounds present in the reaction mixture or formed by transesterification and polycondensation, with the proviso that the temperature of the reaction mixture does not exceed 250° C.




    This process enables the production of polyethylene or polypropylene terephthalates with selected end groups from polyester waste. The process products are characterized by good soil release properties and can be used as additives in detergents and cleaning agents.

    Hydroxy carboxylic acid esters, manufacturing process thereof and use thereof

    公开(公告)号:US11208372B2

    公开(公告)日:2021-12-28

    申请号:US16990496

    申请日:2020-08-11

    摘要: Disclosed are compounds of formula (I) (R1OOC)a—R2(OH)c—COO—(CnH2n—O)m—OC—R3(OH)d—(COOR4)b  (I) wherein R1 and R4 independently of one another are hydrogen, a metal cation, an ammonium cation, C1-C6-alkyl, cycloalkyl with three to nine ring carbon atoms, aryl with five to ten ring carbon atoms, aryl that is substituted with one or two alkyl groups, aryl that is connected via an alkylene group with the carboxyl group, —(CnH2n—O)m—H or —O—R2(COOR1)a+1, R2 and R3 independently of one another are aliphatic hydrocarbon residues with one to eight carbon atoms, a and b independently of one another are integers from 1 to 4, c is an integer from 0 to 4, d is an integer from 1 to 4, n is 2, 3 or 4, and m is 1, 2, 3 or 4, with the proviso that R1 and R4 may be different within a molecule within the given definitions. These compounds are characterized by a very good complexation power for metal cations and can be used in detergents and cleaning agents, in oil extraction and for water softening.

    Co-Granules, Detergents and Cleaning Agents and Use Thereof

    公开(公告)号:US20210277333A1

    公开(公告)日:2021-09-09

    申请号:US17193022

    申请日:2021-03-05

    摘要: Described are co-granules coated with cellulose ether and containing b1) cyclic sulfonimine, b2) bleach activator selected from the group consisting of tetraacetylethylenediamine, decanoyloxybenzoic acid or mixtures thereof, and b3) cellulose ether as binder. These co-granules can be produced by wet granulation and are very storage-stable.
    The co-granules can be used in detergents and cleaning agents, which contain (a) bleaching agent selected from the group consisting of perborate, percarbonate or mixtures thereof, and (b) the co-granules coated with cellulose ether. These detergents and cleaning agents contain highly active bleach activators and bleach catalysts and are characterized by high storage stability. The combination of components b1) and b2) and peroxygen compound a) leads to a pronounced disinfection effect even at low temperatures.
    The detergents and cleaning agents can be used even at low temperatures and show a good washing performance.

    Hydroxy Carboxylic Acid Esters, Manufacturing Process Thereof and Use Thereof

    公开(公告)号:US20210053904A1

    公开(公告)日:2021-02-25

    申请号:US16990496

    申请日:2020-08-11

    摘要: Disclosed are compounds of formula (I) (R1OOC)a—R2(OH)c—COO—(CnH2n—O)m—OC—R3(OH)d—(COOR4)b  (I) wherein R1 and R4 independently of one another are hydrogen, a metal cation, an ammonium cation, C1-C6-alkyl, cycloalkyl with three to nine ring carbon atoms, aryl with five to ten ring carbon atoms, aryl that is substituted with one or two alkyl groups, aryl that is connected via an alkylene group with the carboxyl group, —(CnH2n—O)m—H or —O—R2(COOR1)a+1, R2 and R3 independently of one another are aliphatic hydrocarbon residues with one to eight carbon atoms, a and b independently of one another are integers from 1 to 4, c is an integer from 0 to 4, d is an integer from 1 to 4, n is 2, 3 or 4, and m is 1, 2, 3 or 4, with the proviso that R1 and R4 may be different within a molecule within the given definitions. These compounds are characterized by a very good complexation power for metal cations and can be used in detergents and cleaning agents, in oil extraction and for water softening.