The current invention concerns a method for preparing a polyisobutene (PiB) in water emulsion characterized by the steps :
- combining a number of separate fluid streams of PiB and water with formation of alternating fluid lamellae of PiB and water,
- focusing the alternating fluid lamellae of PiB and water with formation of a focused total fluid stream,
- gradually tapering the cross-flow section of said focused total fluid stream in the direction of the flow in a manner that decays said alternating polyisobutene and water fluid lamellae.
The current invention relates to a method for producing dispersions. The current invention also concerns the emulsions produced by said method. The current method also relates to polymer emulsions, particularly polyisobutene emulsions with a high content of polyisobutene.
The current method also relates to a method for reducing the average droplet diameter of an emulsion, comprising the steps :
- providing an emulsion, comprising droplets of a dispersed phase within a continuous phase, characterized by an average droplet diameter and a viscosity ratio of the dispersed phase to said continuous phase of at least 4.0, and
- reducing said average droplet diameter by forcing said emulsion through a gradually tapered cross-flow section of in the direction of the flow in a manner that decays said alternating polyisobutene and water fluid lamellae.
本发明涉及一种在
水中制备聚
异丁烯(PiB)乳液的方法,其特征在于: :
- 将多股独立的 PiB 和
水的流体结合在一起,形成 PiB 和
水的交替流体片层、
- 集中 PiB 和
水的交替液层,形成集中的总液流、
- 以衰减所述交替聚
异丁烯和
水流体薄片的方式,沿流动方向逐渐减小所述聚焦总流体流的横流截面。
本发明涉及一种生产分散体的方法。本发明还涉及用上述方法生产的乳液。本发明还涉及聚合物乳液,特别是聚
异丁烯含量较高的聚
异丁烯乳液。
本方法还涉及一种减小乳液平均液滴直径的方法,包括以下步骤 :
- 提供一种乳液,该乳液由连续相中的分散相液滴组成,分散相的平均液滴直径和与连续相的粘度比至少为 4.0,以及
- 迫使所述乳液沿流动方向通过逐渐变细的横流截面,以减小所述交替的聚
异丁烯和
水流体片层的方式,从而减小所述平均液滴直径。