EP0252526A2
Expired / Lapsed
EP
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Polyacrylate dispersions prepared with a water-soluble conjugated unsaturated monomer in the absence of a protective colloid
Assignee: Hercules LLC
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Filing: 1987-07-10
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Granted: —
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Expires: 2007-07-10
Abstract
Abstract Disclosed is a process for making aqueous polyacrylate dispersions having improved rheological and stability characteristics by the emulsion polymerization of acrylic esters and methacrylic esters in the absence of a protective colloid, comprising conducting the polymerization in the presence of, by weight of the total monomer content, from about 0.1 to 2% of at least one substantially completely water-soluble monomer having conjugated unsaturation. The resultant aqueous polyacrylate dispersions are useful in the manufacture of latex paints, binders for nonwoven materials, water-based inks, paper coatings and water-borne adhesives, such as pressure-sensitive adhesives.
Inventors
- 👤 Daniel Horace Craig
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 01:59
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
129 words
A process for preparing an acrylic polymer latex by the aqueous emulsion polymerization of an acrylic or methacrylic ester containing up to 22 carbon atoms, in the absence of a protective colloid and in the presence of a polymerization initiator, characterized in that the polymerization is carried out in the presence of from about 0.1% to 2%, by weight of the total monomer, of a water-soluble monomer having conjugated unsaturation, having a solubility of at least 0.4 gram per 100 ml of water at about 20°C, and selected from the group consisting of furoic acid, metal salts, amine salts, ammonium salts and quaternary salts of rosin and of C₅ to C₃₆ carboxylic acids, and water-soluble amine salts, amides, substituted amides, hydroxyalkyl esters, aldehydes, and alcohols of the said monomer.
Claim 2
Dependent Claim
129 words
A process for preparing an acrylic polymer latex by the aqueous emulsion polymerization of an acrylic or methacrylic ester containing up to 22 carbon atoms, in the absence of a protective colloid and in the presence of a polymerization initiator, characterized in that the polymerization is carried out in the presence of from about 0.1% to 2%, by weight of the total monomer, of a water-soluble monomer having conjugated unsaturation, having a solubility of at least 0.4 gram per 100 ml of water at about 20°C, and selected from the group consisting of furoic acid, metal salts, amine salts, ammonium salts and quaternary salts of rosin and of C₅ to C₃₆ carboxylic acids, and water-soluble amine salts, amides, substituted amides, hydroxyalkyl esters, aldehydes, and alcohols of the said monomer.
Claim 3
Dependent Claim
26 words
A process for preparing an acrylic polymer latex as claimed in claim 1, further characterized in that the water-soluble monomer has 5 to 24 carbon atoms.
Claim 4
Dependent Claim
26 words
A process for preparing an acrylic polymer latex as claimed in claim 2, further characterized in that the water-soluble monomer has 5 to 18 carbon atoms.
Claim 5
Dependent Claim
35 words
A process for preparing an acrylic polymer latex as claimed in claim 1, 2 or 3, further characterized in that the metal for forming the metal salts is sodium, potassium, lithium, magnesium, calcium or zinc.
Claim 6
Dependent Claim
39 words
A process for preparing an acrylic polymer latex as claimed in any of the preceeding claims further characterized in that the water-soluble monomer has a solubility of at least 1.0 grams per 100 ml of water at about 20°C.
Claim 7
Dependent Claim
60 words
A process for preparing an acrylic polymer latex as claimed in any of the preceeding claims further characterized in that the water-soluble monomer is selected from the group consisting of the water-soluble amine salts, amides, substituted amides, hydroxyalkyl esters, sulfoalkyl esters, aldehydes, and alcohols of sorbic acid, cinnamic acid, abietic acid, furoic acid, linoleic acid, furylacrylic acid and muconic acid.
Claim 8
Dependent Claim
37 words
A process for preparing an acrylic polymer latex as claimed in any of the preceeding claims, further characterized in that the acrylic esters and methacrylic esters are alkyl acrylates or methacrylates containing up to 10 carbon atoms.
Claim 9
Dependent Claim
37 words
A process for preparing an acrylic polymer latex as claimed in any of the preceeding claims, further characterized in that the acrylic esters and methacrylic esters are copolymerized with one or more monomers capable of addition polymerization.
Claim 10
Dependent Claim
87 words
A process for preparing an acrylic polymer latex as claimed in any of the preceeding claims, further characterized in that the monomers capable of addition polymerization are selected from the group consisting of unsubstituted and substituted styrene, acrylic or methacrylic acid, vinyl and vinylidene halides, allyl esters of saturated monocarboxylic acids, vinyl esters, vinyl ethers, vinyl ketones, dialkyl esters of monoethylenically unsaturated dicarboxylic acids, amine containing ethylenically unsaturated monomers, ethylenically unsaturated monocarboxylic and polycarboxylic acids and the anhydrides, nitriles, unsubstituted and substituted amides of all said acids.
Claim 11
Dependent Claim
43 words
A process for preparing an acrylic polymer latex as claimed in any of the preceeding claims, further characterized in that the monomers capable of addition polymerization are present in an amount from about 0.5% to 50%, by weight of the total monomer content.
Claim 12
Dependent Claim
40 words
A process for preparing an acrylic polymer latex as claimed in claim 11, further characterized in that the monomers capable of addition polymerization are present in an amount not more than about 25%, by weight of the total monomer content.
Claim 13
Dependent Claim
41 words
A process for preparing an acrylic polymer latex as claimed in claim 11, further characterized in that the monomers capable of addition polymerization are present in an amount from about 1% to about 10%, by weight of the total monomer content.
Claim 14
Dependent Claim
56 words
A process for preparing an acrylic polymer latex as claimed in any of the preceeding claims, further characterized in that the the polymerization is carried out in the presence of 0.1 to 5.0% by weight of the total monomer, of an emulsifier selected from the group consisting of anionic, cationic and nonionic emulsifiers and mixtures thereof.
Claim 15
Dependent Claim
85 words
A process for preparing an acrylic polymer latex as claimed in claim 13, further characterized in that all of the water-soluble monomer, from about 1% to about 50% of the remaining monomer mixture and one-half of the polymerization initiator are added in an initial reaction charge, the rest of the remaining monomer mixture is then added continuously over a period from about 2 to about 4 hours, and the remaining half of the polymerization initiator is added and the reaction continued until polymerization is complete.
References Cited (Backward Citations)
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