Small range 文档类型:"4"

Totally found 129 items.

  • [专利] (CN208959721U) 一种聚醋酸乙烯酯块状体溶解装置
    (CN208959721) 本实用新型公开了一种聚醋酸乙烯酯块状体溶解装置,属于化工设备技术领域,包括溶解壳体,所述溶解壳体相对的两侧分别连接有进料口和出料口,出料口上设置有滤网,所述溶解壳体内垂直设置有转轴,所述转轴上设置有叶轮和清扫装置,所述叶轮设置在进料口下方;所述清扫装置包括连接在转轴上的不完全齿轮以及位于不完全齿轮两侧并连接在一起的且可上下往复运动的左齿条和右齿条,所述不完全齿轮转动时交替与左齿条和右齿条啮合,其中一个齿条上连接有清扫片和破碎轮,所述清扫片和破碎轮抵在滤网上。 本实用新型通过破碎轮和清扫片对块状提的碾压和清扫,将块状体碾碎成小块状,加速其溶解消除,同时通过清扫防止堵塞网孔,保证溶液流畅运行。
  • [专利] (US10472481) Method for preparing functional extract-containing polyvinyl alcohol film by heterogeneous saponification of polyvinyl acetate film
    (US10472481) The present invention relates to a method for preparing a functional extract-containing polyvinyl alcohol film, which has an improved specific surface area by having a wrinkled form, and specifically, to a method for preparing a functional extract-containing polyvinyl alcohol film having wrinkles formed on a surface thereof, which comprises saponifying a functional extract-containing polyvinyl acetate film, while the functional extract-containing polyvinyl acetate film is immersed in a first solvent capable of maintaining the film form of the functional extract-containing polyvinyl acetate film, so as to convert the functional extract-containing polyvinyl acetate film into a functional extract-containing polyvinyl alcohol film.
  • [专利] (AU2018101812) Polyvinyl acetate production plant
    (AU2018101812) Polyvinyl acetate production plant Abstract 5 Polyvinyl acetate production plant, including: tank (F101), stirring vessel (D101), filter (M1O), influx condenser (C1Ol), feedstock pump (J101), polymerizer (D102), filter (M102), tank (F102), tank (F103), tank (F104), tank (F105), finished emulsion tank (F106); among them, tank (FlOl) is used to store deionized water, tank (F102) is used to store dibutyl phthalate, tank (F103) is used to store vinyl acetate, tank (F104) 10 is used to store sodium bicarbonate, tank (F 105) is used to store ammonium persulfate; among them, inlet diameter of feedstock pump (JI01) is 180-190 mm. Figure 1 f/I C-, -, t pt~~A4 t ~® -4 Q -I Figure
  • [专利] Application of polyvinyl lactam-polyvinyl acetate block copolymers as crystallization inhibitors for agrochemically active components which are minimally soluble in water, preparation of agrochemical active components which are minimally soluble in water,
    (UA--97964) The invention relates to the application of polyvinyl lactam-polyvinyl acetate block copolymers as solubilizers for agents which are minimally soluble in water.
  • [专利] Polyvinyl acetate latex
    (KR20170054257) The present invention relates to a method of preparing aqueous dispersion of a vinyl acetate polymer, comprising steps of polymerizing vinyl acetate under emulsion polymerization conditions in the presence of a chain transfer agent which is hypophosphite or X-R^1-SH, wherein R^1 is an alkyl group having 1-4 carbon atoms; and X is sulfonate, hydroxyl, sulfate, phosphate, phosphonate, carboxylic acid or a salt thereof, or alkyl carboxylate having 1-3 carbon atoms. The present invention provides a method of lowering the viscosity of vinyl acetate polymer in the given solid content. COPYRIGHT KIPO 2017
  • [专利] Polyvinyl acetate latex
    (AU2015264902) The present invention relates to a process for preparing an aqueous dispersion of a vinyl acetate polymer comprising the step of polymerizing vinyl acetate under emulsion polymerization conditions in the presence of a chain transfer agent which is a hypophosphite salt or X-R1-SH, 5 where R1 is a C1-C 4 alkyl group and X is sulfonate, hydroxyl, sulfate, phosphate, phosphonate, carboxylic acid or a salt thereof, or C1-C 3-alkyl carboxylate. The process provides a way of lowering the viscosity of the vinyl acetate polymer at a given solids content.
  • [专利] Polyvinyl acetate latex
    (EP3162823) The present invention relates to a process for preparing an aqueous dispersion of a vinyl acetate polymer comprising the step of polymerizing vinyl acetate under emulsion polymerization conditions in the presence of a chain transfer agent which is a hypophosphite salt or X-R 1 -SH, where R 1 is a C 1 -C 4 alkyl group and X is sulfonate, hydroxyl, sulfate, phosphate, phosphonate, carboxylic acid or a salt thereof, or C 1 -C 3 -alkyl carboxylate. The process provides a way of lowering the viscosity of the vinyl acetate polymer at a given solids content.
  • [专利] Polyvinyl acetate latex
    (EP3034524) The present invention relates to a process for preparing an aqueous dispersion of a vinyl acetate polymer comprising the step of polymerizing vinyl acetate under emulsion polymerization conditions in the presence of a chain transfer agent which is a hypophosphite salt or X-R 1 -SH, where R 1 is a C 1 -C 4 alkyl group and X is sulfonate, hydroxyl, sulfate, phosphate, phosphonate, carboxylic acid or a salt thereof, or C 1 -C 3 -alkyl carboxylate. The process provides a way of lowering the viscosity of the vinyl acetate polymer at a given solids content.
  • [专利] Polyvinyl acetate latex
    (US20160177081) The present invention relates to a process for preparing an aqueous dispersion of a vinyl acetate polymer comprising the step of polymerizing vinyl acetate under emulsion polymerization conditions in the presence of a chain transfer agent which is a hypophosphite salt or X—R1—SH, where R1 is a C1-C4 alkyl group and X is sulfonate, hydroxyl, sulfate, phosphate, phosphonate, carboxylic acid or a salt thereof, or C1-C3-alkyl carboxylate. The process provides a way of lowering the viscosity of the vinyl acetate polymer at a given solids content.
  • [专利] Polyvinyl acetate latex
    (KR20160075324) The present invention relates to a method for preparing a water-soluble dispersoid of a vinyl acetate polymer. More particularly, the method comprises a step of polymerizing vinyl acetate under the condition of emulsion polymerization in presence of hypophosphite salt or X-R1-SH which is a chain transfer agent. R1 is an alkyl group having 1-4 carbon atoms, and X is sulfonate, hydroxyl, sulfate, phosphate, phosphonate, carboxylic acid or salt thereof, or an alkyl carboxylate group having 1-3 carbon atoms. The method can lower viscosity of the vinyl acetate polymer having a given amount of solids.
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