Process for providing homogeneous copolymers of vinylpyrrolidone and
3-dimethylaminopropyl methacrylamide (DMAPMA) which form clear aqueous
solutions having high cloud points
    1.
    发明授权
    Process for providing homogeneous copolymers of vinylpyrrolidone and 3-dimethylaminopropyl methacrylamide (DMAPMA) which form clear aqueous solutions having high cloud points 失效
    提供形成具有高浊点的透明水溶液的乙烯基吡咯烷酮和3-二甲基氨基丙基甲基丙烯酰胺(DMAPMA)的均相共聚物的方法

    公开(公告)号:US5684105A

    公开(公告)日:1997-11-04

    申请号:US685366

    申请日:1996-07-23

    CPC分类号: C08F226/10 C08F220/60

    摘要: A process for making homogeneous copolymers of vinylpyrrolidone (VP) and 3-dimethylaminopropyl methacrylamide (DMAPMA) which form clear aqueous solutions having high cloud points. The process involves precharging VP and DMAPMA monomers in a predetermined ratio, and then feeding VP and DMAPMA at a predetermined rate, the ratio of the components in the initial charge and the feeding rates for the monomer being selected in accordance with the reactivity rates of the monomers towards copolymerization as opposed to homopolymerization.

    摘要翻译: 制备乙烯基吡咯烷酮(VP)和3-二甲基氨基丙基甲基丙烯酰胺(DMAPMA)的均匀共聚物的方法,其形成具有高浊点的透明水溶液。 该方法包括以预定的比例预先给VP和DMAPMA单体预充电,然后以预定的速率供给VP和DMAPMA,根据初始电荷中的组分与所选单体的进料速率的比例,根据 单体相对于均聚反应而进行共聚。

    Process for the color stabilization of an aqueous N-vinyl heterocyclic
copolymer solution
    2.
    发明授权
    Process for the color stabilization of an aqueous N-vinyl heterocyclic copolymer solution 失效
    N-乙烯基杂环共聚物水溶液的颜色稳定化方法

    公开(公告)号:US5534564A

    公开(公告)日:1996-07-09

    申请号:US355137

    申请日:1994-12-13

    CPC分类号: C08F226/06 C08K5/0091

    摘要: This invention relates to a process for the production of a substantially odorless, color stable N-vinyl heterocyclic copolymer in pure deionized water or in aqueous alcoholic solution which includes contacting an alcohol solution of the copolymer, under reduced pressure, at alcohol reflux temperature with water and a reducing agent selected from the group of a nitrogen containing borane complex, sulfurous acid and/or an alkali metal salt of sulfurous acid and recovering an aqueous, 10-80 wt. % solids solution of the copolymer having a substantially color free stability for a period of more than a year.

    摘要翻译: 本发明涉及一种在纯净的去离子水或含水醇溶液中生产基本上无臭,色泽稳定的N-乙烯基杂环共聚物的方法,该方法包括使该共聚物的醇溶液在醇的回流温度下与水 和选自含氮硼烷络合物,亚硫酸和/或亚硫酸的碱金属盐的还原剂,并回收10-80wt。 具有基本上无色稳定性的共聚物的固体固体%溶液持续一年以上。

    Color stabilized aqueous n-vinyl heterocyclic copolymer solutions
    5.
    发明授权
    Color stabilized aqueous n-vinyl heterocyclic copolymer solutions 失效
    颜色稳定的N-乙烯基杂环共聚物水溶液

    公开(公告)号:US5604275A

    公开(公告)日:1997-02-18

    申请号:US534753

    申请日:1995-09-27

    IPC分类号: C08F226/06 C08K5/00 C08K5/35

    CPC分类号: C08F226/06 C08K5/0091

    摘要: This invention relates to an N-vinyl heterocyclic copolymer in substantially pure deionized water or in aqueous alcoholic solution which exhibits significantly reduced color and odor and which is obtained by contacting an alcohol-copolymer mixture with water and a nitrogen containing, trivalent boron complex compound selected from the group of borane-ammonia, borane-lower alkylamine, tetra-lower alkyl ammonium octahydrotriborate, morpholine-borane, lower alkyl morpholine-borane, silylamino borane and mixtures thereof and stripping alcohol from the resulting mixture under vacuum at between about 100 and about 740 mm Hg below absolute whereby an aqueous, 10-70 wt. % solids solution of the copolymer is obtained having a water white color stability of more than a year.

    摘要翻译: 本发明涉及基本上纯的去离子水或含水醇溶液中的N-乙烯基杂环共聚物,其表现出显着降低的颜色和气味,并且是通过使醇共聚物混合物与水和含氮的三价硼配位化合物接触而获得的 从硼烷 - 氨,硼烷 - 低级烷基胺,四氢低级烷基铵八氢五氟硼酸盐,吗啉 - 硼烷,低级烷基吗啉 - 硼烷,甲硅烷基氨基硼烷及其混合物组合,并在真空下从约100至约 低于绝对值740毫米汞柱,由此得到10-70重量% 得到具有大于一年的水白色稳定性的共聚物的固体%固体溶液。

    Strongly swellable, moderately crosslinked copolymers of
vinylpyrrolidone and vinyl acetate
    7.
    发明授权
    Strongly swellable, moderately crosslinked copolymers of vinylpyrrolidone and vinyl acetate 失效
    乙烯基吡咯烷酮和乙酸乙烯酯的强溶胀中等交联共聚物

    公开(公告)号:US5663258A

    公开(公告)日:1997-09-02

    申请号:US603668

    申请日:1996-02-20

    IPC分类号: C08F226/10 C08F218/08

    CPC分类号: C08F226/10

    摘要: Strongly swellable, moderately crosslinked poly(vinyl pyrrolidone/vinyl acetate) copolymer (XL-PVP/VA) in the form of fine, white powders characterized by (a) an aqueous gel volume of about 15 to 150 ml/g of polymer, (b) a Brookfield viscosity in 5% aqueous solution of at least about 10,000 cps, and (c) being prepared directly by precipitation polymerization of VP and VA monomers in the presence of a crosslinking agent in the amount of about 0.1 to about 2% by weight of VP and VA.

    摘要翻译: 强溶胀性,中等交联的聚(乙烯基吡咯烷酮/乙酸乙烯酯)共聚物(XL-PVP / VA),其为细的白色粉末,其特征在于(a)约15至150ml / g聚合物的水凝胶体积, b)至少约10,000cps的5%水溶液中的布鲁克菲尔德粘度,和(c)直接通过在约0.1至约2%量的交联剂存在下VP和VA单体的沉淀聚合制备, VP和VA的重量。

    Process for providing homogeneous copolymers of vinylpyrrolidone and
vinyl acetate which form clear aqueous solutions having a high cloud
point
    8.
    发明授权
    Process for providing homogeneous copolymers of vinylpyrrolidone and vinyl acetate which form clear aqueous solutions having a high cloud point 失效
    提供乙烯基吡咯烷酮和乙酸乙烯酯的均匀共聚物的方法,其形成具有高浊点的透明水溶液

    公开(公告)号:US5395904A

    公开(公告)日:1995-03-07

    申请号:US163446

    申请日:1993-12-07

    CPC分类号: C08F226/10 C08F218/08

    摘要: A process for making homogeneous copolymers of vinylpyrrolidone (VP) and vinyl acetate (VA) which form clear aqueous solutions and have high cloud points. The process involves precharging VP and VA monomers in a predetermined ratio, and then feeding VP and VA at a predetermined rate, the ratio of the components in the initial charge and the feeding rates for the monomer being selected in accordance with the reactivity rates of the monomers towards copolymerization as opposed to homopolymerization.

    摘要翻译: 制备乙烯基吡咯烷酮(VP)和乙酸乙烯酯(VA)的均匀共聚物的方法,其形成透明的水溶液并具有高浊点。 该方法包括以预定的比例预先给VP和VA单体预充电,然后以预定的速率供给VP和VA,初始充电中的组分与所选择的单体的进料速率之比根据 单体相对于均聚反应而进行共聚。

    Process for the preparation of vinylpyrrolidone/vinyl acetate copolymers
    9.
    发明授权
    Process for the preparation of vinylpyrrolidone/vinyl acetate copolymers 失效
    制备乙烯基吡咯烷酮/乙酸乙烯酯共聚物的方法

    公开(公告)号:US5319041A

    公开(公告)日:1994-06-07

    申请号:US38723

    申请日:1993-03-26

    CPC分类号: C08F226/10

    摘要: This invention relates to an improved process for producing a clear solution of vinylpyrrolidone (VP) and vinyl acetate (VA) monomers which comprises, in an anhydrous system,(a) reacting a C.sub.2 to C.sub.3 alcoholic solution containing said VA monomer and between about 60 and about 80 wt. % portion of total VP monomer in the presence of between about 0.05 and about 0.3 wt. % of a free radical initiator selected from the group consisting of tertamylperoxy pivalate and 2,2-azobis(2-methylbutyronitrile) or a mixture thereof for a period of from about 5 to about 10 hours, at a temperature between about 60.degree. and about 110.degree. C.;(b) gradually adding the remaining VP monomer in C.sub.2 to C.sub.3 alcohol solution at reaction temperature after the addition of the VA monomer is complete;(c) raising the temperature of the resulting reaction mixture to between about 110.degree. and about 150.degree. C.;(d) continuing the polymerization reaction at said higher temperature in the presence of from about 0.11 to about 0.6 wt. %, based on total monomers, of 2,5-dimethyl-2,5-bis(tert-butylperoxy) hexane and(e) cooling the resulting reaction mixture and recovering a homogeneous VP/VA copolymer C.sub.2 to C.sub.3 alcohol solution containing less than 100 ppm of residual vinylpyrrolidone monomer or vinyl acetate residual monomer.

    摘要翻译: 本发明涉及一种用于生产乙烯基吡咯烷酮(VP)和乙酸乙烯酯(VA)单体的透明溶液的改进方法,其包括在无水体系中,(a)使含有所述VA单体的C2至C3醇溶液与约60 和约80wt。 在约0.05至约0.3重量%存在下的总VP单体的%部分。 %的过氧化新戊酸叔丁酯和2,2-偶氮双(2-甲基丁腈)的自由基引发剂或其混合物在约5至约10小时之间,温度在约60°至约 110℃。 (b)在加入VA单体完成后,在反应温度下逐渐加入剩余的VP单体在C2〜C3醇溶液中; (c)将所得反应混合物的温度提高至约110℃至约150℃; (d)在约0.11至约0.6重量%的存在下,在所述较高温度下继续进行聚合反应。 %,基于总单体,2,5-二甲基-2,5-双(叔丁基过氧))己烷和(e)冷却所得反应混合物,并回收均匀的VP / VA共聚物C2至C3醇溶液含有少于 100ppm的残余乙烯基吡咯烷酮单体或乙酸乙烯酯残留单体。