摘要:
Butene-1 (co)polymers characterized by the following properties: content of butene-1 units in the form of isotactic pentads (mmmm) from 25 to 55%; intrinsic viscosity [η] measured in tetraline at 135° C. from 1 to 3 dL/g; content of xylene insoluble fraction at 0° C. from 3 to 60%; and a ratio ES2/ES1>1, where ES1 is the boiling diethyl ether soluble fraction determined on the polymer as such and ES2 is the boiling diethyl ether soluble fraction determined after milling the polymer. The butene-1 (co)polymers show a good balance between processability and elastomeric behavior.
摘要翻译:丁烯-1(共)聚合物,其特征在于以下性质:全同立构五单元形式的丁烯-1单元的含量(mmmm)为25至55%; 在135℃的四氢化萘中测量的特性粘度η为1至3dL / g; 0℃下二甲苯不溶级分含量为3〜60%; 和ES ES 2 / ES 1比1,其中ES 1是在聚合物上测定的沸腾二乙醚可溶级分,ES为ES 沸点二乙醚可溶级分是在研磨聚合物之后测定的。 丁烯-1(共)聚合物在加工性和弹性体性能之间显示出良好的平衡。
摘要:
Butene-1 (co)polymers characterized by the following properties: content of butene-1 units in the form of isotactic pentads (mmmm) from 25 to 55%; intrinsic viscosity [η] measured in tetraline at 135° C. from 1 to 3 dL/g; content of xylene insoluble fraction at 0° C. from 3 to 60%; and a ratio ES2/ES1≧1, where ES1 is the boiling diethyl ether soluble fraction determined on the polymer as such and ES2 is the boiling diethyl ether soluble fraction determined after milling the polymer. The butene-1 (co)polymers show a good balance between processability and elastomeric behavior.
摘要:
Propylene-ethylene copolymers are flexible and show a very good balance between softness and mechanical properties in their crude state are obtained by solution polymerization in the presence of Ziegler-Natta catalysts. The said copolymers comprise from 10 to 50% wt of ethylene and are characterized by: product of the comonomer reactivity ratio r1·r2≦1.5; absence of 2,1 propylene insertions and tensile strength at break higher than 4 Mpa.
摘要:
A process for cross-linking an elastomer-containing thermoplastic polyolefin composition comprising the steps of preparing a masterbatch by mixing and/or masticating an elastomeric polyolefin with a cross-linking co-agent, and optionally an additive, in the presence of a thermoplastic polyolefin; then, cooling the masterbatch obtained in the preceding step at least up to the solidification of the thermoplastic polyolefin; and finally mixing and/or masticating the masterbatch, after the cooling step, with a cross-linking agent and optionally an additive.
摘要:
Injection-moulded refrigerator liners of a thermoplastic polymer characterized by the presence of means for mechanical bonding on the insulating foam.
摘要:
Disclosed is a process for coating the inner surface of metal containers by deposition of specific polyolefin compositions on the separate parts of the containers, subsequent assembly of the parts and melting of the polyolefin compositions.
摘要:
Apparatus for coating the interior surfaces of metal containers by electrostatic deposition of specific polyolefin compositions on the separate parts of the containers prior to assembly of the containers and melting of the polyolefin compositions, which includesa first spray booth containing at least one electrostatic powder spraying device for spraying a polyolefin composition powder, the first spray booth being adapted for spraying the bottoms and lids of the containers,means for conveying the bottoms and lids of containers in the first spray booth,a second spray booth containing at least one electrostatic powder spraying device for spraying a polyolefin composition powder, the second spray booth being adapted for spraying the bodies of the containers,means for conveying the bodies of containers in the second spray booth, andat least one electrostatic generator connected to the spraying devices.
摘要:
A process for cross-linking an elastomer-containing thermoplastic polyolefin composition comprising the steps of preparing a masterbatch by mixing and/or masticating an elastomeric polyolefin with a cross-linking co-agent, and optionally an additive, in the presence of a thermoplastic polyolefin; then, cooling the masterbatch obtained in the preceding step at least up to the solidification of the thermoplastic polyolefin; and finally mixing and/or masticating the masterbatch, after the cooling step, with a cross-linking agent and optionally an additive.