Claims
- 1. A process for making a self-emulsifiable resin powder composition comprising:
- (a) polymerizing from about 0.1 to 6 phm acrylic acid, from about 0.1 4 phm methacrylic acid, and from about 93 to 99 phm copolymerizable monomers in an aqueous medium in the presence of from about 0.005 to 1 phm of at least one member selected from the group consisting of metal salts of alkyl sulfates and metal salts of alkyl sulfonates, to form a terpolymer emulsion with the proviso that no more than a total of 7 phm of acrylic acid, methacrylic acid, and other carboxyl group containing monomers is polymerized into the terpolymer; and
- (b) drying said terpolymer emulsion to form a self-emulsifiable resin powder composition.
- 2. A process for making a self-emulsifiable resin powder composition as specified in claim 1 wherein said drying is done by spray drying.
- 3. A process as specified in claim 2 wherein said polymerization is initiated by utilizing at least one member selected from the group consisting of metal persulfates and ammonium persulfate.
- 4. A process for making a self-emulsifiable resin powder composition as specified in claim 3 wherein said member selected from the group consisting of metal persulfates and ammonium persulfate is a member selected from the group consisting of sodium persulfate, potassium persulfate, and ammonium persulfate.
- 5. A process for making a self-emulsifiable resin powder composition as specified in claim 4 wherein said polymerization is carried out at a temperature of from 20.degree. C. to 95.degree. C.
- 6. A process for making a self-emulsifiable resin powder composition as specified in claim 5 wherein said copolymerizable monomers are selected from the group consisting of vinylaromatic monomers, alkyl acrylate monomers, and diene monomers.
- 7. A process for making a self-emulsifiable resin powder composition as specified in claim 6 wherein the total amount of repeat units derived from acrylic acid, methacrylic acid, and other carboxyl group containing monomers in said terpolymer is from 2 to 4 weight percent.
Parent Case Info
This is a divisional of application Ser. No. 207,418 filed on Jun. 16, 1988, now U.S. Pat No. 4,855,400 of Mariano Salazar for SELF-EMULSIFIABLE RESIN POWDER, which is a Divisional of U.S. Pat. No. 4,777,198, issued Oct. 11, 1988, which is a Continuation of application Ser. No. 801,354, filed on Nov. 25, 1985, now abandoned.
US Referenced Citations (5)
Foreign Referenced Citations (2)
Number |
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2445813 |
Sep 1974 |
DEX |
883939 |
Jul 1943 |
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Divisions (2)
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Number |
Date |
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Parent |
207418 |
Jun 1988 |
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Parent |
52927 |
May 1987 |
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Continuations (1)
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801354 |
Nov 1985 |
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