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    • 4. 发明申请
    • THERMOPLASTIC POLYOLEFIN BLENDS
    • 热塑性聚烯烃共混物
    • WO2012112259A2
    • 2012-08-23
    • PCT/US2012/022177
    • 2012-01-23
    • EXXONMOBIL CHEMICAL PATENTS INC.TSE, Mun, FuJIANG, Peijun
    • TSE, Mun, FuJIANG, Peijun
    • C08L23/04C08F10/02C08J5/18C08F2/01
    • C08F10/02C08F4/65908C08F4/65912C08F4/65925C08F4/65927C08F10/00C08F110/02C08F210/16C08J5/18C08J2323/08C08J2423/08C08L23/0807C08L2205/02C08F2/001C08F2500/07C08F2500/11C08F2500/20C08F210/14C08F2500/08C08F4/65904
    • This invention relates to a blend composition comprising: 1) a linear ethylene containing polymer, such as a LLDPE, a HDPE or the like; and at least 1 weight percent of an in-reactor polymer blend comprising: (a) a first ethylene containing polymer having a density of greater than 0.90 g/cm 3 and a M w of more than 20,000 g/mol; and (b) a second ethylene containing polymer having a density of less than 0.90 g/cm 3 , wherein the polymer blend has a T m of at least 90°C (DSC second melt), a density of less than 0.92 g/cm 3 , and the densities of the first and second polymers differ by at least 1%. Alternately the in-reactor polymer blend comprises: (a) a first ethylene polymer comprising 90 wt% to 100 wt% ethylene and from 0 wt% to less than 10 wt% comonomer, said first ethylene polymer component having density of greater than 0.920 g/cm 3 , an M w of 20,000 g/mol or more; and (b) a second ethylene polymer comprising from 70 wt% to 90 wt% ethylene and 30 wt% to 10 wt% comonomer, said second ethylene polymer having a density of 0.910 g/cm 3 or less, wherein the in-reactor polymer blend has one or more of the following characteristics: (a) at least 78 wt% ethylene; (b) a T m of at least 100°C over a density ranging from 0.84 to 0.92 g/cm 3 ; (c) a elongation at break of 300% or more; (d) a strain hardening ratio M300/M100 of at least 1.2; (e) a ratio of complex viscosity at 0.01 rad/s to the complex viscosity at 100 rad/s of at least 30; and (f) a shear thinning index of less than -0.2.
    • 本发明涉及一种共混组合物,其包含:1)含线性乙烯的聚合物,如LLDPE,HDPE等; 和至少1重量%的反应器内聚合物共混物,其包含:(a)密度大于0.90g / cm 3和M w / 小于20,000克/摩尔; 和(b)密度小于0.90g / cm 3的第二含乙烯聚合物,其中该聚合物共混物的T min至少为90℃( DSC第二熔体),密度小于0.92g / cm 3,第一和第二聚合物的密度相差至少1%。 或者,反应器内聚合物共混物包含:(a)包含90重量%至100重量%乙烯和0重量%至小于10重量%共聚单体的第一乙烯聚合物,所述第一乙烯聚合物组分具有大于0.920g / cm 3,Mw为20,000g / mol或更多; 和(b)包含70重量%至90重量%乙烯和30重量%至10重量%共聚单体的第二乙烯聚合物,所述第二乙烯聚合物的密度为0.910g / cm 3或更低 其中所述反应器内聚合物共混物具有以下特征中的一个或多个:(a)至少78wt%的乙烯; (b)在0.84-0.92g / cm 3的密度范围内至少100℃的T min; (c)300%或更多的断裂伸长率; (d)应变硬化比M300 / M100至少为1.2; (e)0.01rad / s下的复数粘度与100rad / s下的复数粘度之比至少为30; 和(f)小于-0.2的剪切稀化指数。