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29 条记录 (耗时 0.031 秒)

    Unsaturated formaldehyde copolymer resins derived from diaryl oxides, sulfides, dibenzofuran or dibenzothiophene
    1.
    发明授权
    Unsaturated formaldehyde copolymer resins derived from diaryl oxides, sulfides, dibenzofuran or dibenzothiophene 失效
    衍生自二芳基氧化物，硫化物，二苯并呋喃或二苯并噻吩的不饱和甲醛共聚物树脂

    公开(公告)号：US3914194A

    公开(公告)日：1975-10-21

    申请号：US34717373

    申请日：1973-04-02

    申请人： DOW CHEMICAL CO

    发明人： SMITH HARRY A

    IPC分类号： C08F290/14 ,  C08G16/02 ,  C08L91/00 ,  C08G8/08 ,  C08G16/04

    CPC分类号： C08G16/025 ,  C08F290/14 ,  C08G16/0218

    摘要： A formaldehyde copolymer resin having dependent unsaturated groups with the repeating unit:

    WHEREIN R is an aliphatic acyl group derived from saturated acids having 2-6 carbons, olefinically unsaturated acids having 3-20 carbons, or an omega-carboxy-aliphatic acyl group derived from olefinically unsaturated dicarboxylic acids having 4-12 carbons or mixtures thereof, R1 is independently hydrogen, an alkyl group of 1-10 carbon atoms, or halogen, Z is selected from oxygen, sulfur, the group represented by Z taken with the dotted line represents dibenzofuran and dibenzothiophene moieties, or mixtures thereof, n is a whole number sufficient to give a weight average molecular weight greater than about 500, m is 0-2, p and q have an average value of 0 to 1 with the proviso that the total number of p and q groups are sufficient to give greater than one unsaturated group per resin molecule. These resins are useful to prepare coatings on various substrates or for potting electrical components by mixing with reactive diluents and curing agents and curing.

    摘要翻译： 具有依赖性不饱和基团的甲醛共聚物树脂具有重复单元：（R1）m（R1）m || CH2- ||（CH2-OR）p（CH2-OR）qn WHEREIN R是衍生自饱和的脂族酰基 具有2-6个碳原子的酸，具有3-20个碳的烯属不饱和酸或衍生自具有4-12个碳原子的烯属不饱和二羧酸的ω-羧基 - 脂肪族酰基或其混合物，R 1独立地是氢，烷基为1 -10个碳原子或卤素，Z选自氧，硫，由虚线表示的Z表示的基团表示二苯并呋喃和二苯并噻吩部分或其混合物，n是足以使重均分子量更大的整数 约为500，m为0-2，p和q的平均值为0至1，条件是每个树脂分子中p和q基团的总数足以产生大于1个不饱和基团。

    Phenol-formaldehyde adhesive resins by addition of polyhydric alcohols
    6.
    发明授权
    Phenol-formaldehyde adhesive resins by addition of polyhydric alcohols 失效
    酚醛树脂通过添加多元醇

    公开(公告)号：US3661814A

    公开(公告)日：1972-05-09

    申请号：US3661814D

    申请日：1970-12-21

    申请人： DOW CHEMICAL CO

    发明人： SMITH HARRY A ,  KOBEL ERWIN H

    IPC分类号： C08G8/28 ,  C08G5/06 ,  C08G5/18 ,  C08G51/04

    CPC分类号： C09J161/06

    摘要： IMPROVED PHENOL-FORMALDEHYDE ADHESIVE RESINS ARE OBTAINED BY PREMIXING WITH AQUEOUS FORMALDEHYDE ABOUT 0.5-10 WEIGHT PERCENT BASED ON FORMALDEHYDE OF A POLYHYDRIC ALCOHOL OF FORMULA I:

    R ((OCMH2M)AOH)B

    WHERE R IS A C4-C12 ALIPHATIC GROUP, M IS 2-4, A IS 0-3 AND B IS 4-8, AND THEREAFTER REACTING THE FORMALDEHYDEPOLYHYDRIC ALCOHOL SOLUTION WITH PHENOL IN THE PRESENCE OF ALKALI. PREFERRED ARE WATER-SOLUBLE SUGARS AND RELATED POLYOLS INCLUDING THEIR C2-C4 ALKYLENE OXIDE DERIVATIVES. THE RESULTING THERMOSETTING RESOLE ADHESIVE RESINS ARE PARTICULARLY SUITABLE FOR PLYWOOD GLUES.