Protected catalytic composition and its preparation and use for preparing polymers from ethylenically unsaturated monomers
AssigneeRohm and Haas Company
InventorsRalph Even, Willie Lau
Life of this patent
Estimating the term…
Abstract
A method for polymerizing ethylenically unsaturated monomers, including non-polar olefinic monomers, polar olefinic monomers, and combinations thereof, using a protected catalytic composition in an aqueous medium, is disclosed. An aqueous dispersion containing the protected catalytic composition is also disclosed, along with an aqueous dispersion of the addition polymer produced by the polymerization.
Claims10
A method for preparing a protected catalytic composition comprising the steps of:
- A) providing a protective substance;
- and
- B) combining said protective substance with an organometallic catalyst component and, optionally, a fugitive substance, to form a protected catalytic composition,
- wherein:
- said protective substance is a polymer having:
- a) a crystallinity at 25° C. of at least 0% by weight and no more than 25% by weight, based on the total weight of said protective substance;
- b) a number average molecular weight of at least 1,000 g/mole and no more than 100,000 g/mole;
- c) a water solubility at 25° C. of at least 0 millimoles of monomer present, as polymerized units, in said protective substance/liter of water, and no more than 150 millimoles of monomer present, as polymerized units, in said protective substance/liter of water;
- and
- d) a viscosity of at least 1 centipoise and no more than 1,000,000 centipoise at 25° C.;
- said fugitive substance is miscible with said protective substance and has a boiling point at 101 kPa of at least −165° C. and no more than 80° C.;
- and
- said protected catalytic composition has a viscosity of at least 1 centipoise and no more than 10,000 centipoise at 25° C.
A protected catalytic composition comprising:
- a) a protective substance;
- b) an organometallic catalyst component;
- and
- c) optionally a fugitive substance,
- wherein:
- said protective substance is a polymer having:
- a) a crystallinity at 25° C. of at least 0% by weight and no more than 25% by weight, based on the total weight of said protective substance;
- b) a number average molecular weight of at least 1,000 g/mole and no more than 100,000 g/mole;
- c) a water solubility at 25° C. of at least 0 millimoles of monomer present, as polymerized units, in said protective substance/liter of water, and no more than 150 millimoles of monomer present, as polymerized units, in said protective substance/liter of water;
- and
- d) a viscosity of at least 1 centipoise and no more than 1,000,000 centipoise at 25° C.
- said fugitive substance is miscible with said protective substance and has a boiling point at 101 kPa of at least −165° C. and no more than 80 ° C.;
- and
- said protected catalytic composition has a viscosity of at least 1 centipoise and no more than 10,000 centipoise at 25° C.
An aqueous protected catalytic composition dispersion comprising plural particles of a protected catalytic composition dispersed in an aqueous medium, wherein said protected catalytic composition comprises
- a) a protective substance;
- b) an organometallic catalyst component;
- and
- b) optionally a fugitive substance;
- said protective substance is a polymer having:
- i) a crystallinity at 25° C. of at least 0% by weight and no more than 25% by weight, based on the total weight of said protective substance;
- ii) a number average molecular weight of at least 1,000 g/mole and no more than 100,000 g/mole;
- iii) a water solubility at 25° C. of at least 0 millimoles of monomer present, as polymerized units, in said polymer/liter of water, and no more than 150 millimoles of monomer present, as polymerized units, in said polymer/liter of water;
- and
- iv) a viscosity of at least 1 centipoise and no more than 1,000,000 centipoise at 25° C.;
- said fugitive substance is miscible with said protective substance and has a boiling point at 101 kPa of at least −165° C. and no more than 80 ° C.;
- and
- said protected catalytic composition has a viscosity of at least 1 centipoise and no more than 10,000 centipoise at 25° C.
Dependencies are inferred from the claim text.