Claims
- 1. A process for producing a polymer of a monomer having an ethylenically unsaturated double bond, which comprises polymerizing the monomer in a polymerization vessel having a coating on its inner wall surfaces, whereby polymer scale is prevented from being deposited, wherein said coating has been formed by applying an alkaline solution of pH from 9 to 14 of:
- (A) a condensation product consisting of
- (A-1) a hydroxynaphthalene compound (1): having the following general formula ##STR4## wherein R.sup.1 group or groups, which may be the same or different from each other, are each a member selected from the group consisting of --H, --SO.sub.3 H and --COOH, i is an integer from 1 to 4, and j is an integer from 0 to 4, and
- (A-2) at least one aldehyde compound selected from the group consisting of the compounds of the following general formulas (2) and (4):
- R.sup.2 --CHO (2)
- wherein R.sup.2 is --H, --COOH, --CHO or an alkyl group of from 1 to 5 carbon atoms; ##STR5## wherein R.sup.3 group or groups, which may be the same or different from each other, are each a member selected from the group selected from the group consisting of --H and --OH, and m is an integer from 1 to 6; and ##STR6## wherein R.sup.4 is a hydrogen atom or an alkyl group of 1 to 5 carbon atoms, and, where plural R.sup.4 's are present, they may be the same or different, and n is an integer from 1 to 4,
- (B) an inorganic colloid of silica, an oxide, a hydroxide or a mixture of two or three thereof, said oxide and hydroxide being those of a metal selected from the group consisting of aluminum, titanium, zirconium, tin and iron, and
- (C) a water-soluble polymeric compound selected from the group consisting of gelatin, casein, polyacrylic acid, carboxymethyl cellulose, polyvinyl pyrrolidine and pectin, in a mixed solvent containing water and a organic solvent miscible with water, said organic solvent being present in an amount of not more than 50% by weight based on said mixed solvent, followed by drying.
- 2. The process of claim 1, wherein said polymerization is conducted as suspension polymerization, emulsion polymerization, solution polymerization, bulk polymerization, or gas phase polymerization.
- 3. The process of claim 1, wherein said monomer comprises at least one compound selected from the group consisting of vinyl halides; vinyl esters; acrylic acid, methacrylic acid, and their esters and salts; maleic acid, fumaric acid, and their esters and anhydrides; diene monomers; styrene; acrylonitrile; vinylidene halides; and vinyl ethers.
- 4. The process of claim 1, wherein the component (A-1) comprises at least one compound selected from the group consisting of 1-naphthol, 1,4-dihydroxynaphthalene, 1,2,3-trihydroxynaphthalene, 1,4,5,8-tetrahydroxynaphthalene and 1-naphthol-4-sulfonic acid.
- 5. The process of claim 1, wherein the component (A-2) comprises at least one compound selected from the group consisting of formaldehyde, glyoxylic acid, benzaldehyde, salicylaldehyde and furfural.
- 6. The process of claim 1, wherein the condensation product (A) is obtained by condensing the component (A-1) with the component (A-2), the amount of the component (A-2) being from 0.1 to 10 moles per 1 mole of the component (A-1).
- 7. The process of claim 1, wherein the component (B) is present in an amount of from 0.1 to 1000 parts by weight per 100 parts by weight of the component (A).
- 8. The process of claim 1, wherein the total concentration of the components (A) and (B) in the alkaline solution is from 0.005 to 10% by weight.
Priority Claims (1)
Number |
Date |
Country |
Kind |
4-324887 |
Nov 1992 |
JPX |
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Parent Case Info
This is a Division of application Ser. No. 08/321,467 filed on Oct. 11, 1994, now U.S. Pat. No. 5,576,370 which is a Continuation of Ser. No. 08/149,948, filed Nov. 10, 1993 (abandoned).
US Referenced Citations (1)
Number |
Name |
Date |
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5548039 |
Shimizu |
Aug 1996 |
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Divisions (1)
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Number |
Date |
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321467 |
Oct 1994 |
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Continuations (1)
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Number |
Date |
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149948 |
Nov 1993 |
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