Use of polypropylene composition
A technology of propylene polymer and composition, used in rotomolding products, the application field of polymer composition for rotomolding
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Examples
Embodiment 1
[0124] Example 1 - Blending
[0125] Preparation of propylene polymer components
[0126] Polymers having the properties listed in Table 1 below were prepared according to the methods described in the illustrated prior art or purchased from the indicated suppliers.
[0127] Table 1
[0128] get together
combine
thing
nature
MFR 2
(g / 10
minute)
C 2 content
(wt%)
Tc
(℃)
T m
(℃)
reduce
stick
crack
change *
Tensile modulus
(MPa)
warping
(mm)
1 a
Homopolymer
20
yes, use
VCH's
polymer
-
129
167
no
2200
47
2 b
Homopolymer
20
no
-
110
161
yes ...
Embodiment 2
[0148] Example 2 - Preparation of bimodal propylene polymers using a reactor
[0149] Preparation of Bimodal Propylene Polymers
[0150] Two polymers with the properties listed in Table 4 below were prepared according to the Borstar method described here.
[0151] Table 4
[0152]
[0153]Polymers 11 and 12 were prepared according to the examples in EP887379, with the difference that, where noted, a multistage polymerization process was used comprising prepolymerization, polymerization in a loop reactor (slurry polymerization), followed by Final polymerization in gas phase reactor. The loop reactor and / or the gas phase reactor are additionally replenished with comonomer during the polymerization. The ZN catalyst used is described in US 5,234,879, used at a temperature of 135°C. The catalyst is contacted with a cocatalyst (triethylaluminum, TEAL) and an external donor (donor D, dicyclopentyldimethoxysilane) to produce a catalyst system with an Al / Ti ratio of 200 and an...
Embodiment 3
[0159] Example 3 - Preparation of bimodal propylene polymer / impact modifier using reactor
[0160] Three polymers with the properties listed in Table 6 below were prepared according to the Borstar method described here.
[0161] These polymers were prepared according to the examples in EP887379, only where it was noted that a multi-stage polymerization process was used, which included prepolymerization, polymerization in a loop reactor (slurry polymerization), followed by a gas phase reactor final aggregation. The loop reactor and / or the gas phase reactor are additionally replenished with comonomer during the polymerization. The ZN catalyst used is described in US 5,234,879, used at a temperature of 135°C. The catalyst was contacted with a cocatalyst (triethylaluminum, TEAL) and an external donor (donor D, dicyclopentyldimethoxysilane) to obtain a catalyst system with an Al / Ti ratio of 200, respectively (executed Example 13) and 360 (Examples 14 and 15) with an Al / D ratio o...
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Abstract
Description
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Application Information
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