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发明授权
CN105179943B PVA改性脲醛树脂微胶囊包覆的聚α-烯烃稳定悬浮液 有权

PVA改性脲醛树脂微胶囊包覆的聚α-烯烃稳定悬浮液
摘要：
本发明涉及一种PVA改性脲醛树脂微胶囊包覆的聚α‑烯烃稳定悬浮液。其制备方法如下：第一步，将摩尔比为脲素和甲醛加入烧杯，磁力搅拌；第二步，加入PVA溶液，制得脲醛预聚体溶液；第三步，反应完毕，将脲醛预聚体自然冷却至室温，并用柠檬酸酸调节至PH=7.0；第四步，将聚α‑烯烃块状固体用剪刀剪碎至10目以下，溶入正庚烷，第五步，将脲醛预聚体溶液与聚α‑烯烃正庚烷溶液混合；第六步，使用HCl调节PH至5.0～6.0，第七步，溶液与丁醇、水混合，制得聚α‑烯烃的稳定悬浮液。本发明能优化改进现有油品减阻剂后处理工艺，增强悬浮液稳定性，提高油品减阻剂的储存时长，简化聚α‑烯烃后处理步骤。
摘要（英）：

The invention relates to PVA modified urea resin microcapsule coated poly-alpha-olefin stable suspension. A preparation method of the suspension comprises the following steps: (1) urea and formaldehyde with a mol ratio are added in a beaker for magnetic stirring; (2) PVA solution is added to prepare urea prepolymer solution; (3) after the reaction is finished, the urea prepolymer is naturally cooled to the room temperature; and citric acid is used for adjusting the PH to 7.0; (4) a poly-alpha-olefin massive solid is shorn to below 10 meshes by a scissor, and is dissolved in n-heptane; (5) the urea prepolymer solution is mixed with poly-alpha-olefin n-heptane solution; (6) the PH is adjusted to 5.0-6.0 by using HCl; and (7) the solution is mixed with butanol and water to prepare the poly-alpha-olefin stable suspension. A traditional oils drag reducer aftertreatment process is optimized and improved; the stability of the suspension is enhanced; the storage time of oils drag reducer is prolonged; and the poly-alpha-olefin aftertreatment steps are simplified.

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