Heterogeneous polyvinyl ester dispersions and powders
Patent 5907011 Issued on May 25, 1999. Estimated Expiration Date: 
March 31, 2017. 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.
March 31, 2017. 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 3316198 3598677 3714105 3746677 3853686 3883480 3883489 Pressure-sensitive adhesives Adhesive aqueous dispersions of polyvinyl alcohol graft polymers with acidic hardeners and process of production Pressure-sensitive adhesive and vinyl acetate-ethylene copolymer emulsion useful as base material therefor InventorsAssigneeApplicationNo. 828557 filed on 03/31/1997US Classes:524/524, Ester derived from an unsaturated alcohol and a saturated acid, e.g., vinyl acetate, etc.524/459, Solid polymer utilized contains vinyl alcohol units524/501, Producing an aqueous system by mixing two or more aqueous emulsions, suspensions, dispersions, or solutions, or any of the above in admixture with one another and wherein each individually contains a solid polymer or SICP524/503, Polyvinyl alcohol or modified form thereof524/516, Solid polymer derived from nitrogen heterocycle monomer524/521, Solid polymer derived from a monomer containing an atom other than C, O, H, or chlorine524/522, Solid polymer derived from carboxylic acid-containing monomer524/523, Solid polymer derived from carboxylic acid ester monomer525/57, With solid polymer derived from ethylenic reactants only525/203, Solid polymer derived from ethylenic reactant containing a heterocyclic nitrogen525/204, Heterocyclic reactant contains at least two hetero atoms in the same ring and at least one of which is nitrogen525/205, Heterocyclic reactant is an imide or lactam525/216, Solid polymer derived from cycloaliphatic-containing reactant525/217, Solid polymer derived from reactant containing nitrogen atom other than from (meth)acrylonitrile525/218, Nitrogen reactant contains a carboxylic acid amide group525/220, Solid polymer derived from reactant containing a carbonyl group other than as part of a carboxylic acid or derivative525/221, Solid polymer derived from reactant containing a carboxylic acid group525/222, Solid polymer derived from reactant containing a carboxylic acid ester group526/202, Normally solid polymer contains free alcohol group or alcoholate thereof526/319, From carboxylic acid ester monomer526/330, Interpolymer of an ester derived from ethylenically unsaturated alcohol, e.g., interpolymer of vinyl acetate, etc.526/331Interpolymerized with hydrocarbon monomerExaminersPrimary: Reddick, Judy M.Attorney, Agent or FirmForeign Patent References
International ClassC08L 031/04Foreign Application Priority Data1994-09-02 DEAbstractHeterogeneous, solvent- and plasticizer-free polyvinyl ester dispersions which are stabilized by protective colloids and which have a minimum filming temperature of below 10° C. are disclosed. These dispersions are made of a mixture of(a) a homopolymer or copolymer A having a glass transition temperature of above 20° C., whereby homopolymer or copolymer A includes(i) from 85 to 100% by weight of at least one vinyl ester of carboxylic acids having 1 to 18 carbon atoms;(ii) from 0 to 5% by weight of at least one , ଲ-unsaturated carboxylic acid;(iii) from 0 to 5% by weight of at least one mono-olefinically unsaturated compound (a3) having at least one amino or amido group, and(iv) from 0 to 5% by weight of at least one polyethylenically unsaturated monomer, and(b) a copolymer B having a glass transition temperature of below 20° C., whereby copolymer B includes(i) from 45 to 98% by weight of at least one vinyl ester of carboxylic acids having 1 to 18 carbon atoms;(ii) from 2 to 50% by weight of at least on -mono-olefin having 1 to 4 carbon atoms and(iii) from 0 to 5% by weight of at least one polyethylenically unsaturated monomer. Also disclosed are powders obtained from these dispersions by spray-drying, and dispersion prepared by redispersing the spray-drying powders. These materials are suitable as adhesives for bonding porous and semiporous substrates.Other References
Field of SearchProducing an aqueous system by mixing two or more aqueous emulsions, suspensions, dispersions, or solutions, or any of the above in admixture with one another and wherein each individually contains a solid polymer or SICPPolyvinyl alcohol or modified form thereof Ester derived from an unsaturated alcohol and a saturated acid, e.g., vinyl acetate, etc. Solid polymer utilized contains vinyl alcohol units Solid polymer derived from a monomer containing an atom other than C, O, H, or chlorine Solid polymer derived from carboxylic acid-containing monomer Solid polymer derived from carboxylic acid ester monomer Solid polymer derived from nitrogen heterocycle monomer Normally solid polymer contains free alcohol group or alcoholate thereof From carboxylic acid ester monomer Interpolymer of an ester derived from ethylenically unsaturated alcohol, e.g., interpolymer of vinyl acetate, etc. Interpolymerized with hydrocarbon monomer With solid polymer derived from ethylenic reactants only Solid polymer derived from ethylenic reactant containing a heterocyclic nitrogen Heterocyclic reactant is an imide or lactam Heterocyclic reactant contains at least two hetero atoms in the same ring and at least one of which is nitrogen Solid polymer derived from reactant containing nitrogen atom other than from (meth)acrylonitrile Solid polymer derived from cycloaliphatic-containing reactant Nitrogen reactant contains a carboxylic acid amide group Solid polymer derived from reactant containing a carbonyl group other than as part of a carboxylic acid or derivative Solid polymer derived from reactant containing a carboxylic acid group Solid polymer derived from reactant containing a carboxylic acid ester group | |
