Extrusion-blown films from graft polymers prepared from cereal flour
    2.
    发明授权
    Extrusion-blown films from graft polymers prepared from cereal flour 失效
    由谷物粉制成的接枝聚合物的挤出吹塑薄膜

    公开(公告)号:US5609817A

    公开(公告)日:1997-03-11

    申请号:US468489

    申请日:1995-06-06

    IPC分类号: B29C47/00 B29C55/00 B29C55/28

    摘要: Moisture-shrinkable films can be extrusion blown from flour-poly(methyl acrylate) graft copolymers. The films shrink when exposed at room temperature to relative humidities approaching 100%. The films have potential application in shrink-wrapping irregularly shaped articles without application of heat. Easy removal of the films by water washing is another feature suitable for this use. This invention allows the use of unmodified cereal flour in lieu of gelatinized starch as the substrate for graft polymerization. This substitution greatly simplifies the preparation and isolation of the graft copolymers and reduces the expense of the process by lowering raw material costs.

    摘要翻译: 水分收缩膜可以从面粉 - 聚(丙烯酸甲酯)接枝共聚物挤出吹塑。 当在室温下暴露于接近100%的相对湿度时,膜收缩。 这些薄膜在不加热的情况下具有潜在的应用于收缩包装不规则形状的制品。 通过水洗方便地去除膜是适用于此用途的另一个特征。 本发明允许使用未改性的谷物粉代替胶凝淀粉作为接枝聚合的底物。 该取代大大简化了接枝共聚物的制备和分离,并通过降低原料成本降低了该方法的费用。

    Sugar-based polymers
    8.
    发明授权
    Sugar-based polymers 失效
    糖基聚合物

    公开(公告)号:US5618933A

    公开(公告)日:1997-04-08

    申请号:US251628

    申请日:1994-05-31

    IPC分类号: C07H15/04 C08B37/00 C07H13/02

    CPC分类号: C07H15/04 C08B37/00

    摘要: Chemoenzymatic methods of making sugar-based polymers are disclosed as well as novel sugar-based polymers. In one embodiment, acylated sugars are copolymerized with coreactants to yield novel sugar-based polymers. In another embodiment, non-reducing sugars acylated with a compound having a terminal double bond are polymerized to yield novel sugar-based polymers.

    摘要翻译: 公开了制备糖基聚合物的化学酶学方法以及新的基于糖的聚合物。 在一个实施方案中,酰化糖与共反应物共聚以产生新的基于糖的聚合物。 在另一个实施方案中,用具有末端双键的化合物酰化的非还原糖被聚合以产生新的基于糖的聚合物。

    Water soluble graft copolymers of lignin-(2-propenamide)-(sodium
2,2-dimethyl-3-imino-4-oxohex-5-ene-1-sulfonate), methods of making the
same and uses therefor
    9.
    发明授权
    Water soluble graft copolymers of lignin-(2-propenamide)-(sodium 2,2-dimethyl-3-imino-4-oxohex-5-ene-1-sulfonate), methods of making the same and uses therefor 失效
    木质素 - (2-丙烯酰胺) - (2,2-二甲基-3-亚氨基-4-氧代己-5-烯-1-磺酸钠)的水溶性接枝共聚物,其制备方法和用途

    公开(公告)号:US4687828A

    公开(公告)日:1987-08-18

    申请号:US771270

    申请日:1985-08-30

    摘要: A water-soluble graft copolymer of lignin-(2-propenamide)-(sodium 2,2-dimethyl-3-imino-4-oxohex-5-ene-1-sulfonate) having a central lignin network and at least one grafted side chain, R, having randomly repeating units of the formula: ##STR1## such that the central lignin network has a molecular weight of about 1,000 to 100,000 and the total number of randomly repeating units in the grafted side chain or chains is in the range of 1,000 to 300,000, such that the total copolymer molecular weight is in the range of 40,000 to 30,000,000.The copolymers of the present invention are useful as thickeners for water and aqueous solutions and may be advantageously used in the recovery of oil from subterranean wells or in the preparation and use of drilling fluid compositions.

    摘要翻译: 具有中心木质素网络的木质素 - (2-丙烯酰胺) - (2,2-二甲基-3-亚氨基-4-氧代己-5-烯-1-磺酸钠)的水溶性接枝共聚物和至少一个接枝侧 链,R,具有下式的随机重复单元:图像,使得中心木质素网络具有约1,000至100,000的分子量,并且接枝的侧链或链中的无规重复单元的总数在 1,000至300,000,使得总共聚物分子量在40,000至30,000,000的范围内。 本发明的共聚物可用作水和水溶液的增稠剂,并且可有利地用于从地下井中回收油或在钻井液组合物的制备和使用中使用。