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    Process for preparing polymeric acetal carboxylate salts
    41.
    发明授权
    Process for preparing polymeric acetal carboxylate salts 失效
    制备聚乙醛羧酸盐的方法

    公开(公告)号：US4140676A

    公开(公告)日：1979-02-20

    申请号：US882843

    申请日：1978-03-02

    Applicant: Marvin M. Crutchfield ,  Charles J. Upton

    Inventor： Marvin M. Crutchfield ,  Charles J. Upton

    IPC: C02F5/10 ,  C08G2/14 ,  C08G2/30 ,  C11D3/00 ,  C11D3/37

    CPC classification number: C11D3/3711 ,  C02F5/10 ,  C08G2/14 ,  C08G2/30

    Abstract: Alkali metal salts of polymeric acetal carboxylate are stable detergent builders under laundry use conditions but depolymerize in acid media, making the polymer fragments more readily biodegradable in waste streams. According to the improved process of the present invention, an ester of a polymeric acetal carboxylate is brought together in a reaction zone with a sufficient amount of an alkali metal base having a normality of at least 5 normal, and preferably at least 10 normal, to saponify at least 50 percent of the ester groups. In the preferred embodiment, the ester is contacted with a solvent to remove color-producing impurities.

    Abstract translation: 聚合乙缩醛羧酸盐的碱金属盐在洗衣使用条件下是稳定的洗涤剂助洗剂，但在酸性介质中解聚，使聚合物碎片在废物流中更容易生物降解。 根据本发明的改进方法，聚合物缩醛羧酸酯的酯在反应区中与足量的碱金属碱形成在一起，所述碱金属碱的正常值为至少5正常值，优选至少10原子％ 皂化至少50％的酯基。 在优选的实施方案中，酯与溶剂接触以除去产生颜色的杂质。

    Novel thermosetting resins and process for preparing the same comprising reacting a novolak with a titanic acid ester
    42.
    发明授权
    Novel thermosetting resins and process for preparing the same comprising reacting a novolak with a titanic acid ester 失效
    新型热固性树脂及其制备方法，包括用氨基酸酯反应NOVOLAK

    公开(公告)号：US3950309A

    公开(公告)日：1976-04-13

    申请号：US302207

    申请日：1972-10-30

    Applicant: Tzong Jeng Chu ,  Susumu Konii

    Inventor： Tzong Jeng Chu ,  Susumu Konii

    IPC: C08G8/28 ,  C08G77/52 ,  C08G79/00 ,  C08G2/30

    CPC classification number: C08G8/28 ,  C08G77/52 ,  C08G79/00

    Abstract: A novel thermosetting resin, the thermoset resin obtained therefrom having such a thermal resistance that the temperature at which the thermoset resin is caused to show a weight loss of 6% by heating at a temperature elevation rate of 10.degree.C. per minute is at least 400.degree.C., is prepared by reacting a specific phenolic resin with a member selected from the group consisting of a silicic acid ester of the formula Si(OR).sub.4 wherein R represents alkyl or aryl, a titanic acid ester of the formula Ti(OR).sub.4 wherein R has the same meaning as defined above and a mixture thereof in the presence of an alkaline catalyst while keeping the reaction system in a molten state, to an extent that 20 - 70 mole %, based on the phenol present in the starting system to be reacted with said member, of phenolic hydroxyl groups in terms of the amount of phenol, remain unreacted. The thus obtained novel resins of the present invention can be easily set or hardened in accordance with the ordinary manner; namely by mixing with a thermohardening agent such as hexamethylenetetramine and then heating, to give thermoset resins having a superior thermal resistance as compared with the conventional phenolic resins. In addition, the thermoset resins obtained from the novel resins of this invention are excellent in mechanical strength, electrical properties and luster of molded articles.

    Process for imparting stability to polyacetals
    43.
    发明授权
    Process for imparting stability to polyacetals 失效
    向聚合物粘合稳定性的方法

    公开(公告)号：US3875117A

    公开(公告)日：1975-04-01

    申请号：US31897072

    申请日：1972-12-27

    Applicant: SIR SOC ITALIANA RESINE SPA

    Inventor： ACKERMANN JACOB ,  RADICI PIERINO ,  ERINI PIETRO

    IPC: C08G2/00 ,  C08G2/18 ,  C08G2/30 ,  C08G2/32 ,  C08G2/34 ,  C08G1/26 ,  C08G3/00

    CPC classification number: C08G2/18 ,  C08G2/30 ,  Y02P20/582

    Abstract: Process for stabilising polyacetals of a molecular weight above 10,000 containing residues of one or more aldehydes with or without residues of non-aldehydic co-monomers by reaction of the terminal hydroxyl groups of the macromolecule with a blocking reagent, in which the said reagent is brought into contact with the polyacetal suspended in a reaction medium which is liquid under the working conditions, the said reaction medium comprising at least one substance which is inert vis-a-vis the other constituents of the reaction mixture, is not solvent vis-a-vis the polymer and is liquid under the reaction conditions, and at least one substance which is solvent with respect to the polymer and the reagent and which is liquid under the reaction conditions, the said solvent and non-solvent substances being completely miscible under the conditions in which reaction takes place, but immiscible or partially miscible at temperatures substantially below the reaction temperatures.

    Preparation of polyacrolein-sodium bisulfite adduct
    44.
    发明授权
    Preparation of polyacrolein-sodium bisulfite adduct 失效
    聚丙烯酸钠双酚A的制备

    公开(公告)号：US3640933A

    公开(公告)日：1972-02-08

    申请号：US3640933D

    申请日：1969-03-20

    Applicant: NALCO CHEMICAL CO

    Inventor： KEKISH GEORGE T ,  JAMES WILLIAM G ,  SIMONS DUANE J

    IPC: C08G2/00 ,  C08G2/14 ,  C08G2/30 ,  D21H17/42 ,  C08F45/24

    CPC classification number: D21H17/42 ,  C08G2/14 ,  C08G2/30

    Abstract: IN THE PROCESS OF PRODUCING AN AQUEOUS BISULFITE ADDUCT USEFUL AS A PAPER MILL ADDITIVE FROM A WET CAKE OF POLYACROLEIN CONTAINING ABOUT 40-50% SOLIDS, WATER AND AT LEAST ONE C5-C8 ALKANE AS A NON-SOLVENT DILUENT PRODUCED BY HOMOPOLYMERIZING THE ACROLEIN MONOMER BY AN INVERT EMULSION TECHNIQUE, THE IMPROVEMENTS CONSISTING IN FORMING A REACTION MIX UTILIZING A BISULFITE REACTANT IN A WEIGHT RATIO OF ABOUT 1.5-2.5 PARTS PER PART OF POLYACROLEIN BASED UPON THEORETICAL MONOMER, STRIPPING THE C5-C8 ALKANE DILUENT FROM THE REACTION MIX BY AZEOTROPIC VACUUM DISTILLATION FOR A SHORT TIME PERIOD AND SUBSEQUENTLY HEATING AND REACTING THE POLYACROLEIN AND BISULFITE FOR ABOUT 1-3 HOURS AT 195-205*F. AT ATMOSPHERIC PRESSURE AND AT AN ACID PH OF 3.5-4.5 TO PRODUCE AN AQUEOUS POLYACROLEIN-BISULFITE ADDUCT AND TERMINALLY HEATING THE REACTION MIX BY VACUUM DISTILLATION FOR A SHORT-PERIOD OF TIME TO REMOVE RESIDIUM C5-C8 ALKANE DILUENT AND SO2 AND ADJUSTING THE WATER CONTENT SO THAT THE NOW DISSOLVED POLYACROLEIN (PAC) BISULFITE ADDUCT SOLIDS EQUAL ABOUT 35% OF THE TOTAL.

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