NCO-modified polyoxymethylene block copolymers
    2.
    发明授权
    NCO-modified polyoxymethylene block copolymers 有权
    NCO改性聚甲醛嵌段共聚物

    公开(公告)号:US09534090B2

    公开(公告)日:2017-01-03

    申请号:US14654640

    申请日:2013-12-16

    Abstract: The invention relates to a method for producing NCO-modified polyoxymethylene block copolymers comprising the step of polymerizing formaldehyde in a reaction vessel in the presence of a catalyst, the polymerization of formaldehyde in addition taking place in the presence of a starter compound comprising at least 2 Zerewitinoff active H atoms to obtain an intermediate product. The intermediate product obtained is reacted further with an isocyanate to obtain an NCO-modified polyoxymethylene block copolymer. The invention also relates to NCO-modified polyoxymethylene block copolymers obtained by a method of this type and to the use of said copolymers for producing polyurethane polymers.

    Abstract translation: 本发明涉及一种生产NCO-改性聚甲醛嵌段共聚物的方法,其包括在催化剂存在下在反应容器中聚合甲醛的步骤,另外在存在起始化合物的情况下进行甲醛的聚合,所述起始化合物包含至少2 Zerewitinoff活性H原子获得中间产物。 所获得的中间产物进一步与异氰酸酯反应,得到NCO-改性的聚甲醛嵌段共聚物。 本发明还涉及通过这种方法获得的NCO改性的聚甲醛嵌段共聚物和所述共聚物用于生产聚氨酯聚合物的用途。

    Process for the preparation of polyacetals
    5.
    发明授权
    Process for the preparation of polyacetals 失效
    制备聚缩醛的方法

    公开(公告)号:US5608030A

    公开(公告)日:1997-03-04

    申请号:US290377

    申请日:1994-08-15

    Abstract: Process for continuous preparation of homo- and copolyoxymethylenes with stable end groups in a homogeneous phase, in which in a tubular reactor with static mixing elements cyclic formaldehyde oligomers are polymerized in the presence of protonic acids as initiators in amounts of 0.005 to 500 ppm in a polymerization zone, in which the residence time of the reaction components in this zone is 0.1 to 10 min and in which the initiator is deactivated immediately after polymerization, there being a fluid transition between the polymerization and deactivator zones which is determined solely by the addition of deactivator, and in which, besides deactivation, stabilization of the chain ends is carried out in the presence of residual monomers, with the volatile constituents being removed from the reaction mixture in a subsequent vent unit. Stabilization is carried out in the presence of alkaline substances, either at temperatures of 150.degree. C. to 250.degree. C., if necessary in the presence of water or primary alcohols, or at 175.degree. C. to 250.degree. C. in the absence of these additives.

    Abstract translation: 在均相中连续制备具有稳定端基的均聚和共聚氧亚甲基的方法,其中在具有静态混合元件的管式反应器中,环状甲醛低聚物在质子酸作为引发剂存在下聚合,其量为0.005-500ppm 聚合区,其中反应组分在该区域中的停留时间为0.1至10分钟,其中引发剂在聚合后立即失活,在聚合和失活区之间存在流体转变,其仅通过加入 除去失活之外,在残留单体的存在下进行链端的稳定化,其中挥发性成分在随后的通风单元中从反应混合物中除去。 在碱性物质的存在下,如果需要,在水或伯醇的存在下,或在175℃至250℃下,在不存在碱的条件下,在碱性物质的存在下,在150℃至250℃的温度下进行稳定化 的这些添加剂。

    Alkyl aryl ketone/formaldehyde resin having high softening point
    10.
    发明授权
    Alkyl aryl ketone/formaldehyde resin having high softening point 失效
    具有高软化点的烷基芳基酮/甲醛树脂

    公开(公告)号:US4731434A

    公开(公告)日:1988-03-15

    申请号:US628537

    申请日:1984-07-06

    Applicant: Jorg Dorffel

    Inventor: Jorg Dorffel

    CPC classification number: C08G6/02

    Abstract: Condensation resins obtained by the polycondensation of alkyl aryl ketones and formaldehyde, wherein the polycondensation mixture contains 0.05 to 5% by weight, based on the alkyl aryl ketone, of an activator having the formula (A) ##STR1## wherein X is a nitrogen or phosphorus atom; R.sub.1, R.sub.2 and R.sub.3 are each independently a C.sub.1-3 -alkyl group or a phenyl group; and Y.sup.- is the anion of an inorganic or organic acid, have higher softening points than resins prepared by analogous processes but without the activator.

    Abstract translation: 通过烷基芳基酮和甲醛的缩聚获得的缩合树脂,其中所述缩聚混合物基于烷基芳基酮含有0.05至5重量%的具有式(A)的活化剂,其中X为 氮或磷原子; R1,R2和R3各自独立地为C1-3烷基或苯基; 和Y-是无机或有机酸的阴离子,具有比通过类似方法制备但不含活化剂制备的树脂更高的软化点。

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