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44 条记录 (耗时 0.019 秒)

    Processes and compositions to enhance the tensile strength of reclaimed sand bonded with alkaline resins
    1.
    发明授权
    Processes and compositions to enhance the tensile strength of reclaimed sand bonded with alkaline resins 失效
    提高与碱性树脂粘结的再生砂的拉伸强度的方法和组合物

    公开(公告)号：US5089540A

    公开(公告)日：1992-02-18

    申请号：US596546

    申请日：1990-10-12

    申请人： David R. Armbruster ,  S. Raja Iyer ,  Merlyn C. Pasion

    发明人： David R. Armbruster ,  S. Raja Iyer ,  Merlyn C. Pasion

    IPC分类号： B22C1/02 ,  B22C1/22 ,  C08G8/28 ,  C08G16/02

    CPC分类号： C08G8/28 ,  B22C1/02 ,  B22C1/22 ,  C08G16/0218

    摘要： The present invention provides methods for treating reclaimed sand obtained from dismantled foundry molds and cores which contain residue from a cured binder of an ester-cured alkaline phenolic resin. Treatment of the reclaimed sand with a silane solution containing one or more amines, particularly an aqueous solution containing a silane and one or more amines, enhances the tensile strengths of foundry molds and cores produced therefrom relative to those obtained with untreated reclaimed sand. Methods for producing foundry cores and molds which incorporate such a treatment process are also provided by this invention, as are raw batch formulations.

    摘要翻译： 本发明提供了从拆除的铸造模具和芯中得到的再生砂的处理方法，其中含有由固化的碱性酚醛树脂的固化的粘合剂的残留物。 用含有一种或多种胺，特别是含有硅烷和一种或多种胺的水溶液的硅烷溶液处理再生砂，相对于用未经处理的再生砂获得的那些，可提高铸造模具和由其生产的芯的抗拉强度。 本发明还提供了包含这种处理方法的铸造芯和模具的生产方法，以及生批料配方。

    Thermosettable resins and frictional materials made therefrom
    2.
    发明授权
    Thermosettable resins and frictional materials made therefrom 失效
    可热固化树脂和由其制成的摩擦材料

    公开(公告)号：US4096108A

    公开(公告)日：1978-06-20

    申请号：US687132

    申请日：1976-05-17

    申请人： Benton Paul Webb ,  Donald Louis Nelson

    发明人： Benton Paul Webb ,  Donald Louis Nelson

    IPC分类号： C08G16/02 ,  C08L61/10 ,  C08L61/34 ,  F16D69/02 ,  C08K3/34

    CPC分类号： C08G16/0218 ,  C08L61/34 ,  F16D69/021

    摘要： Superior frictional materials are formed by heating under pressure in the presence of a filler, e.g., asbestos, and a source of formaldehyde, e.g., hexamethylenetetramine, the polymers formed by reacting (1) a mixture of compounds selected from the group having the formulaR.sub.1 --A--CH.sub.2 --OCH.sub.2 --.sub.y A--.sub.x CH.sub.2 --OCH.sub.2 --.sub.y R.sub.3wherein each A is an independently selected aromatic radical having the formula ##STR1## WHEREIN EACH R.sub.1 represents an independently selected radical from the group consisting of hydrogen, --CH.sub.2 --OCH.sub.2 --.sub.y R.sub.3 ; each R.sub.2 represents an independently selected radical selected from the group consisting of R.sub.1, halogen or an alkyl group of 1 to 10 carbon atoms; R.sub.3 represents a radical selected from the group consisting of hydrogen, methoxy, ethoxy, propoxy or --A--H; x represents an integer from 0 to 60; y represents an integer from 0 to 4; z represents an integer from 0 to 2; and B represents oxygen or sulfur; provided that if x is 0 and A is diphenyloxide, then y must be 1 or greater; which mixture may contain up to 50% by weight unreacted aromatic HAH; with (2) at least one monomeric reactant selected from the group ##STR2## WHEREIN R represents hydrogen, alkyl or aryl of 1 to 20 carbon atoms and ##STR3## M REPRESENTS AN INTEGER FROM 1 TO 3; O REPRESENTS AN INTEGER FROM 1 TO 5; P REPRESENTS AN INTEGER FROM 0 TO 3; B represents oxygen, sulfur or C.sub.1 to C.sub.3 alkylidene and q represents an integer from 0 to 1; and finally with (3) formaldehyde in the presence of an acid catalyst at a temperature of from between about 90.degree. C to about 190.degree. C for from several minutes to several hours.

    摘要翻译： 优选的摩擦材料通过在填料（例如石棉）和甲醛源（例如六亚甲基四胺）的存在下加压而形成，所述聚合物通过使（1）选自具有式R1的化合物的混合物 -A-CH2-OCH2-yA-xCH2-OCH2-yR3，其中每个A是独立选择的具有下式的芳族基团：其中R 1表示独立选自下列基团：氢， CH2-OCH2-yR3; 每个R 2表示独立选自下组的基团：R1，卤素或1-10个碳原子的烷基; R3表示选自氢，甲氧基，乙氧基，丙氧基或-A-H的基团; x表示0〜60的整数， y表示0〜4的整数， z表示0〜2的整数， B表示氧或硫; 条件是如果x为0且A为二苯氧基，则y必须为1或更大; 该混合物可含有至多50重量％的未反应芳香族HAH; 其中（2）至少一种单体反应物，其选自基团R表示氢，1至20个碳原子的烷基或芳基和1至3的整数; O代表1到5的整数; P代表0到3的整数; B表示氧，硫或C1至C3亚烷基，q表示0至1的整数; 最后用（3）甲醛在酸催化剂存在下，在约90℃至约190℃的温度下进行几分钟至数小时。

    Photosensitive composition and planographic printing plate precursor using same
    8.
    发明授权
    Photosensitive composition and planographic printing plate precursor using same 失效
    光敏组合物和平版印刷版前体使用相同

    公开(公告)号：US06355396B1

    公开(公告)日：2002-03-12

    申请号：US09533946

    申请日：2000-03-23

    申请人： Ippei Nakamura

    发明人： Ippei Nakamura

    IPC分类号： G03F7039

    CPC分类号： C08L61/06 ,  B41C1/1008 ,  B41C1/1016 ,  B41C2201/04 ,  B41C2201/12 ,  B41C2201/14 ,  B41C2210/02 ,  B41C2210/06 ,  B41C2210/22 ,  B41C2210/24 ,  B41C2210/262 ,  B41M5/465 ,  C08G16/0218 ,  C08G16/0231 ,  C08K5/18 ,  Y10S430/145 ,  Y10S430/146

    摘要： Disclosed are a photosensitive composition characterized by high sensitivity and good latitude in development, and a positive-type planographic printing plate precursor that uses the composition in a direct plate production process and enables an image to be formed with high sensitivity with an infrared laser. Namely, the photosensitive composition is disclosed comprising components (a) and (b) as follows and becoming soluble in an aqueous alkaline solution when irradiated with an infrared laser: (a) an infrared-ray absorbing agent represented by formula (I) as follows; and (b) a polymeric compound insoluble in water but soluble in an aqueous alkaline solution

    摘要翻译： 公开了以高灵敏度和良好的显影宽度为特征的感光组合物，以及在直接印版制作工艺中使用该组合物的正型平版印刷版原版，并且能够用红外激光器以高灵敏度形成图像。 也就是说，公开了包含以下组分（a）和（b）的光敏组合物，并且当用红外激光照射时变得可溶于碱性水溶液：（a）由式（I）表示的红外线吸收剂如下 ; 和（b）不溶于水但可溶于碱性水溶液的高分子化合物