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    • 2. 发明申请
    • LOW-FLUORIDE, REACTIVE POLYISOBUTYLENE
    • 低氟化物,活性聚异丁烯
    • WO2017151339A1
    • 2017-09-08
    • PCT/US2017/018615
    • 2017-02-21
    • TPC GROUP LLC
    • GOBIN, AndréKUMAR, RajeevOUELLETTE, WayneNUTT, Michael, O.CZUPSKI, Leonard, M.MACATANGAY, Peggy, J.
    • C08F110/10C08F6/08C08F6/10C08F4/14C08F2/01
    • C08F110/10C08F6/003C08F6/008C08F6/02C08F4/14C08F2/01C08L23/20C08F2/06
    • A method of making a low-fluoride reactive PIB composition incudes in one embodiment: a) providing an isobutylene-enriched C4 feedstock by way of blending a first mixed C4 feedstock with a second feedstock having a lower LB/IsoB index; (b) feeding the isobutylene-enriched C4 feedstock to a polymerization reactor with a catalyst complex comprising BF 3 and a modifier selected from alcohols, ethers and mixtures thereof; (c) polymerizing the isobutylene-enriched C4 feedstock in the reactor while maintaining the reactor at a temperature above -40°C and most preferably above -15°C and utilizing a residence time less than 45 minutes to produce a crude PIB composition in a polymerization mixture; and (d) recovering a purified PIB composition from the polymerization mixture having a molecular weight, Mn, from 250 to 5000 Daltons and an alpha vinylidene content of at least 50 mol %. The crude PIB composition suitably has a fluoride content of less than 100 ppm and the purified PIB composition has a fluoride content of less than 20 ppm. In another aspect, ammonium salts are used to neutralize the catalyst and fluoride salts are sublimed from the product at elevated temperatures.
    • 在一个实施方案中,制备低氟化物反应性PIB组合物的方法包括:a)通过将第一混合C4原料与具有较低LB的第二原料混合来提供富含异丁烯的C4原料 / IsoB索引; (b)将富含异丁烯的C4原料加入到具有包含BF 3和选自醇,醚及其混合物的改性剂的催化剂配合物的聚合反应器中; (c)在反应器中将富含异丁烯的C4原料聚合,同时将反应器保持在-40℃以上并且最优选高于-15℃的温度下,并且使用小于45分钟的停留时间来生产粗PIB组合物 聚合混合物; 和(d)从分子量Mn为250-5000道尔顿和α-亚乙烯基含量为至少50mol%的聚合反应混合物中回收纯化的PIB组合物。 粗PIB组合物合适地具有小于100ppm的氟化物含量,并且纯化的PIB组合物具有小于20ppm的氟化物含量。 另一方面,使用铵盐来中和催化剂,并且氟化物盐在升高的温度下从产物中升华。
    • 3. 发明申请
    • PURIFICATION AND DECOLORIZATION OF POLYMERS
    • 聚合物的净化和脱色
    • WO2017132350A1
    • 2017-08-03
    • PCT/US2017/015095
    • 2017-01-26
    • TOLMAR INC.
    • SEARCY, Justin, DrewLEWIS, George, SalMIDDLETON, John, Charles
    • C08F6/08C08F6/00
    • C08F6/06C08F6/02C08G63/90
    • Methods according to the present invention decolorize a polymer by mixing a solution of the polymer with a photocatalyst and exposing the mixture to ultraviolet light; by way of non-limiting example, the polymer may be a star polymer and the photocatalyst may be titanium dioxide. Methods according to the present invention also utilize a metal scavenger, in some embodiments a solid-phase metal scavenger, to remove a metal catalyst from a polymer solution; by way of non-limiting example, the metal catalyst may be a tin catalyst. The decolorization methods and the catalyst removal methods of the present invention may be practiced separately, sequentially in any order, or simultaneously.
    • 根据本发明的方法通过将聚合物的溶液与光催化剂混合并将混合物暴露于紫外线使得聚合物脱色; 作为非限制性实例,聚合物可以是星形聚合物并且光催化剂可以是二氧化钛。 根据本发明的方法还利用金属清除剂,在一些实施方式中为固相金属清除剂,以从聚合物溶液中除去金属催化剂; 作为非限制性实例,金属催化剂可以是锡催化剂。 本发明的脱色方法和催化剂去除方法可以分开,按任何顺序依次或同时进行。