Process for making a solution of copolymers of maleic anhydride and alkyl vinyl ether in isopropyl acetate of high specific viscosity and at a high solids level
    2.
    发明授权
    Process for making a solution of copolymers of maleic anhydride and alkyl vinyl ether in isopropyl acetate of high specific viscosity and at a high solids level 有权
    制备马来酸酐和烷基乙烯基醚的共聚物在高比粘度和高固体含量的乙酸异丙酯中的溶液的方法

    公开(公告)号:US06624271B1

    公开(公告)日:2003-09-23

    申请号:US10304649

    申请日:2002-11-26

    IPC分类号: C08F12204

    CPC分类号: C08F222/06

    摘要: A process for making a solution of a copolymer of maleic anhydride (MA) and methyl vinyl ether (MVE) monomers the specific viscosity (SV) of the product being about 2.5-6, preferably 3-5, indicating a weight average molecular weight of substantially above one million, preferably above 1.5 million and a solids content of about 20-45%, preferably 30-40, in isopropyl acetate (IPAc), solvent includes the steps of (a) precharging part of MVE in IPAc into a reactor heated to about 50-90° C., and then (b) feeding (i) a solution of MA in IPAc, (ii) the rest of MVE, at a mole ratio of MA:MVE of 1:≧1.5 to 1:

    摘要翻译: 制备马来酸酐(MA)和甲基乙烯基醚(MVE)单体的共聚物溶液的方法,该产物的比粘度(SV)为约2.5-6,优选3-5,表示重均分子量 基本上在100万以上,优选高于150万,乙酸异丙酯(IPAc)溶剂中固体含量约20-45%,优选30-40,包括以下步骤:(a)将IPAc中的部分MVE预先充入加热的反应器 至约50-90℃,然后(b)将(i)在IPAc中的MA溶液,(ii)MVE的其余部分以1:> = 1.5至1: <3,优选1:2.4,和(iii)溶解在IPAc中的自由基引发剂,其量为基于总单体的0.02-0.3%,优选0.05-0.2%,随时间而进入反应器。 通过从溶液中除去溶剂来制备这种MA / MVE共聚物的粉末。

    Process for making crosslinked copolymers of maleic anhydride and methyl
vinyl ether
    6.
    发明授权
    Process for making crosslinked copolymers of maleic anhydride and methyl vinyl ether 失效
    制备马来酸酐和甲基乙烯基醚的交联共聚物的方法

    公开(公告)号:US5874510A

    公开(公告)日:1999-02-23

    申请号:US932996

    申请日:1997-09-18

    CPC分类号: C08F222/06

    摘要: A process for making crosslinked polymers of maleic anhydride and methyl vinyl ether is described. The process is characterized by precharging methyl vinyl ether, partially or totally, in isopropyl acetate, and a crosslinker, and then continuously feeding molten maleic anhydride and methyl vinyl ether into the thus-precharged reactor. The monomer mixture then is polymerized at a temperature of about 60.degree.-80.degree. C. The reaction product is a pumpable, homogeneous suspension of the crosslinked copolymer at a solids level of about 30-50%, which is recoverable in high yield upon removal of the solvent and filtering the suspension.

    摘要翻译: 描述了制备马来酸酐和甲基乙烯基醚的交联聚合物的方法。 该方法的特征在于在乙酸异丙酯和交联剂中部分或全部预充满甲基乙烯基醚,然后将熔融的马来酸酐和甲基乙烯基醚连续供入到如此预充电的反应器中。 单体混合物然后在约60℃-80℃的温度下聚合。反应产物是交联共聚物的可泵送的均匀悬浮液,固体含量为约30-50%,其可以在去除时以高产率回收 的溶剂并过滤悬浮液。

    Denture adhesive
    7.
    发明授权
    Denture adhesive 失效
    假牙胶

    公开(公告)号:US5763554A

    公开(公告)日:1998-06-09

    申请号:US730507

    申请日:1996-10-11

    CPC分类号: C09J135/08 C08L1/26

    摘要: This invention relates to an improved denture adhesive composition having extended holding power accompanied by adhesion building properties during use and having increased gel adhesion, which composition consists essentially of (a) from about 10 to about 35 wt. % lower alkyl vinyl ether-maleic acid copolymer wherein from 0 to about 90 wt. % of the copolymer carboxyl units are converted to a mixture of salts selected from the group of calcium, sodium, strontium, aluminum, zinc, magnesium and potassium; (b) 10-35 wt. % of a crosslinked terpolymer of alkyl vinyl ether, maleic anhydride and a C.sub.16 -C.sub.20 alkyl acrylate or methacrylate, or vinyl ether; crosslinked with a C.sub.6 -C.sub.14 diene, e.g. 9-decadiene, and their salts; (c) 10-35 wt. % of a cohesive agent; in a weight ratio of between about 2:1 and about 1:2 with respect to the copolymer; and (d) from about 30 to about 70 wt. % of an oil base as a carrier.

    摘要翻译: 本发明涉及具有延长的保持力的改进的义齿粘合剂组合物,其在使用期间具有粘附建立性能并且具有增加的凝胶粘附性,该组合物基本上由(a)约10至约35wt。 %低级烷基乙烯基醚 - 马来酸共聚物,其中0至约90wt。 共聚物羧基单元的%转化为选自钙,钠,锶,铝,锌,镁和钾的盐的混合物; (b)10-35重量% %烷基乙烯基醚,马来酸酐和C16-C20烷基丙烯酸酯或甲基丙烯酸酯或乙烯基醚的交联三元共聚物; 与C 6 -C 14二烯交联,例如。 9-癸二烯及其盐; (c)10-35重量% %的凝聚剂; 相对于共聚物的重量比为约2:1至约1:2; 和(d)约30至约70wt。 %的油基作为载体。