Process for producing homogeneous modified copolymers of ethylen

Details Process for producing homogeneous modified copolymers of ethylen Process for producing homogeneous modified copolymers of ethylen

1989-02-27

1991-01-29

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Removing and recycling removed material from an ongoing...

526 67, 526 89, 526194, 526204, 526208, 526209, 526210, 526212, 526213, 526217, 526220, 526222, 5263186, 526329, C08F 238, C08F21000

Patent

active

049887815

ABSTRACT:
A homogeneous, random interpolymer of ethylene and an alpha-olefinically unsaturated carboxylic acid or ester having a melt flow rate in the range of about 0.1 to about 300 g/10 minutes, as determined by ASTM D-1238 (190.degree. C./2160 g), is improved during its manufacture when made in a substantially constant environment in a stirred autoclave under substantially steady-state conditions of temperature, pressure, and flow rates, said temperature and pressure being sufficient to produce a single phase reaction, using a free-radical initiator, said improvement being obtained by the use of a minor amount of a telogenic modifier in the reaction mixture, the process being further characterized by the use of either, or both, of (a) a temperature which is lower than that which would be required without the presence of the telogen, or (b) a pressure which is higher than that which would be required without the presence of the modifier.

REFERENCES:
patent: 3029230 (1962-04-01), Strauss
patent: 4351931 (1982-09-01), Armitage
patent: 4417035 (1983-11-01), Oeder et al.
patent: 4599392 (1986-07-01), McKinney et al.

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