Title:
グラフト共重合体の製造方法
Document Type and Number:
Japanese Patent JP4377545
Kind Code:
B2
Abstract:
Methods are disclosed for making graft copolymers. The methods comprise the steps of: (a) providing (i) an ethylene/propylene (EP) copolymer or other graftable polymer, (ii) an ethylenically unsaturated sulfur-, nitrogen- and/or oxygen-containing monomer, and (iii) an amount of an initiator sufficient to graft said monomer and EP copolymer or other graftable polymer, (b) introducing said EP copolymer or other graftable polymer into an extruder; (c) introducing said monomer into the extruder; (d) introducing said initiator into the extruder, wherein at least one of the above-identified reactants in (a) is introduced in the presence of a polar solvent; and (e) reacting said EP copolymer or other graftable polymer, monomer and initiator by operating said extruder, thereby forming the graft copolymer. This invention also relates to methods of making a dispersant viscosity index improver and methods for making a lubricating oil. This invention further relates to graft copolymer products made by the aforementioned methods.
Inventors:
Goldblatt, Erwin, Leonard
Sawell, Richard
Sawell, Richard
Application Number:
JP2000518007A
Publication Date:
December 02, 2009
Filing Date:
October 28, 1998
Export Citation:
Assignee:
CASTROL LIMITED
International Classes:
C08F255/00; C08F255/04; C08F291/00; C10M145/12; C10M145/16; C10M149/06; C10M149/10; C10M151/02; C10N30/02
Domestic Patent References:
| JP10508051A | ||||
| JP7504925A |
Attorney, Agent or Firm:
Masami Sakai