Process for the preparation of synthetic resin dispersions
Patent 5679735 Issued on October 21, 1997. Estimated Expiration Date: 
December 22, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 22, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2795564 3054762 3423352 3442844 3491039 Preparation of aqueous polyacrylate dispersions having improved flow characteristics Process for the manufacture of copolymers having increased resistance against hydrolysis, the copolymers and their use Polyacrylate dispersions Polyacrylate dispersions Patent #: 4670505 InventorsApplicationNo. 577551 filed on 12/22/1995US Classes:524/459, Solid polymer utilized contains vinyl alcohol units524/460, Solid polymer utilized is derived from an unsaturated carboxylic acid or salt524/733, Cellulose or derivative, e.g., cotton, paper pulp, etc.524/773, Carboxylic acid or derivative not containing a heavy metal atom as DNRM, e.g., anhydride, acyl halide, ester or salt, etc.526/81, Added material is other than monomer per se, or composition containing monomer526/86, Adding catalyst or catalyst component526/87, Adding monomer526/200, Material contains carbohydrate, e.g., starch, sugar, etc.526/201, Material contains previously formed normally solid polymer which is distinct from polymer to be formed and is a polymer formed from at least one ethylenic monomer526/202, Normally solid polymer contains free alcohol group or alcoholate thereof526/203Normally solid polymer is formed from ethylenically unsaturated dicarboxylic acid, ester, salt, or anhydride thereofExaminersPrimary: Szekely, PeterAttorney, Agent or FirmForeign Patent References
International ClassesC08F 002/24C08V 005/101 C08L 033/12 C08L 031/04 Foreign Application Priority Data1994-12-24 DEAbstractA process for the preparation of a synthetic resin dispersion stabilized by a protective colloid employing at least one initiator and based on a polymer of (a) a first monomer of at least one ester of acrylic acid or methacrylic acid and an alcohol containing 1 to 22 carbon atoms; and optionally, (b) a second monomer which can be copolymerized with the first monomers. The process comprises introducing at least 50% of the monomers based on the total weight of the monomers, at least 50% of the protective colloid based on the total weight of the protective colloid, and up to 50% of the initiator based on the total weight of the initiator into a reaction vessel to form an aqueous emulsion. Any remaining monomers and protective colloid and at least 50% of the initiator based on the total weight of the initiator are then added to the reaction vessel at a temperature of 30° to 100° C.Other References
Field of SearchSolid polymer utilized contains vinyl alcohol unitsSolid polymer utilized is derived from an unsaturated carboxylic acid or salt Cellulose or derivative, e.g., cotton, paper pulp, etc. Carboxylic acid or derivative not containing a heavy metal atom as DNRM, e.g., anhydride, acyl halide, ester or salt, etc. Added material is other than monomer per se, or composition containing monomer Adding catalyst or catalyst component Adding monomer Material contains carbohydrate, e.g., starch, sugar, etc. Material contains previously formed normally solid polymer which is distinct from polymer to be formed and is a polymer formed from at least one ethylenic monomer Normally solid polymer contains free alcohol group or alcoholate thereof Normally solid polymer is formed from ethylenically unsaturated dicarboxylic acid, ester, salt, or anhydride thereof | |
