Claims
- 1. A stable aqueous dispersion of particles, which dispersion can be flocculated by increasing its temperature to a value above a transition temperature, said dispersion, in addition to said particles, comprising a polymer selected from the group consisting of polyvinyl methyl ether and a block copolymer of polyvinyl methyl ether and an other polyvinyl ether, said polymer being absorbed onto the surface of the particles via oxygens of the ether groups.
- 2. A dispersion as claimed in claim 1, characterized in that the block copolymer corresponds to the formula (I) ##STR3## wherein R is an organic residual group which is adsorbed onto the surface of the particles,
- n=10-10,000,
- m=2-500, and
- the ratio of n:m ranges between 1:1 and 500:1.
- 3. A dispersion as claimed in claim 2, characterized in that the block copolymer corresponds to the formula (I), wherein m and n have the above-mentioned meaning and R is a hydrocarbon group which may optionally be substituted with an acid residue or salts thereof, a substituted or unsubstituted amino group, a heterocyclic group having at least one nitrogen atom in the ring structure, an alkoxy group or an aryloxy group.
- 4. A dispersion as claimed in claim 3, characterized in that R is an aliphatic carboxylic acid group having 1-20 C-atoms.
Priority Claims (1)
Number |
Date |
Country |
Kind |
94201006 |
Apr 1994 |
EPX |
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Parent Case Info
This is a continuation of application Ser. No. 08/420,273, filed Apr. 11, 1995 and now abandoned.
US Referenced Citations (9)
Non-Patent Literature Citations (1)
Entry |
Svedberg: Colloid Chemistry, Second Edition, Book Dep't., The Chemical Catalog Co. Inc., New York (1928) pp. 263 & 264. �QD 549 592 1928.!. |
Continuations (1)
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Number |
Date |
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Parent |
420273 |
Apr 1995 |
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