Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1999-03-26
2000-02-29
Sanders, Kriellion
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
2641761, 26417713, B29C 4776, B29C 4778
Patent
active
060310278
ABSTRACT:
A method of compounding a multimodal, preferably a bimodal polymer composition comprising a low molecular weight ethylene polymer and a high molecular weight ethylene polymer is described. The composition is compounded during a relatively long time at a low temperature which lies in a narrow temperature range including the melting point of the low molecular weight ethylene polymer. More particularly, the polymer composition is compounded, without addition of a beat transfer medium, in a temperature range from about 10.degree. C. below to about 10.degree. C. above the melting point of the low molecular weight ethylene polymer during a time of more than 10 seconds. The viscosity ratio between the ethylene polymers in said temperature range preferably is from about 5:1 to about 1:5.
REFERENCES:
patent: 3392962 (1968-07-01), Fritsch et al.
patent: 5409646 (1995-04-01), Menon et al.
patent: 5773155 (1998-06-01), Kale et al.
File WPI, Derwent accession No. 94-307394, Mitsubishi Kasei Corp: "Polyethylene type resin coated paper prodn.; useful for container--by melt extruding a polyethylene resin on a paper base using an extruder at screw rotation number higher than critical rotation number" & JP, A, 6234170, 940823, DW9438.
Eggen Svein
Ek Carl-Gustaf
Kjeldsen Kristen
Nygaard Rune
Sahila Aimo
Borealis Polymers OY
Sanders Kriellion
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