发明名称 |
METHOD OF PRODUCING POLYESTERPOLYOLS WITH FUNCTIONALITY FROM 1,95 TO 3,25 AND HYDROXYL NUMBER FROM 90 TO 33 mg KOH/g AND USE THEREOF |
摘要 |
FIELD: chemistry. ^ SUBSTANCE: present invention relates to method of producing polyesterpolyols with functionality from 1.95 to 3.25 and hydroxyl number from 90 to 33 mg KOH/g. The method is realised in two steps. The first step involves reaction of organic polycarboxylic acids with organic polyols at temperature 150-250C to obtain a polyesterpolyol with hydroxyl number from 100 to 40 mg KOH/g and functionality from 1.95 to 3.25. At the second step, cyclic ester monomers are added to the obtained polyesterpolyol at temperature lower than 220C and weight ratio from 10:1 to 1:1. After at most 60 minutes, the temperature must be lower than or equal to 175C. The hydroxyl number of polyesterpolyol drops by at least 5 mg KOH/g. The molar ratio of the cyclic ester monomer to hydroxyl groups of the polyesterpolyol ranges from 0.75:1 to 10:1. ^ EFFECT: obtaining low-viscosity polyesterpolyols using a simple and cheap method. ^ 4 tbl, 6 ex |
申请公布号 |
RU2446183(C2) |
申请公布日期 |
2012.03.27 |
申请号 |
RU20070137595 |
申请日期 |
2007.10.11 |
申请人 |
BAJER MATIRIAL'SAJENS AG |
发明人 |
NEFTSGER KHARTMUT;KLJAJN GERKHARD;SHMIDT MANFRED;KRAUZE JENS;BARNS DZHEJMS-MAJKL;BAUEHR EHRIKA |
分类号 |
C08G63/00;C08G63/78 |
主分类号 |
C08G63/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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