Aminoplast- and phenoplast- resin encapsulated particles
June 18, 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 2119189 3303168 3428607 3454529 Process for producing finely divided hardened resins Process for producing particulate resoles from aqueous dispersion Precured coated particulate material Phenolic resin coated proppants with reduced hydraulic fluid interaction Process for producing particles of crosslinked melamine resin having a uniform particle diameter Abrasion-resistant, aesthetic surface layer laminate InventorsAssigneeApplicationNo. 877816 filed on 06/18/1997US Classes:428/407, Including synthetic resin or polymer427/213.3, Solid encapsulation process utilizing an emulsion or dispersion to form a solid-walled microcapsule (includes liposome)427/213.32, Hardening427/215, Inorganic base427/221, Resin, rubber, or hardenable oil containing coating524/401Inorganic compound devoid of a silicon atom DNRMExaminersPrimary: Le, Hoa VanAttorney, Agent or FirmForeign Patent References
International ClassB32B 005/16AbstractAminoplast and phenoplast particles are obtained by providing an aqueous solution of such a resin having a water tolerance level, adding a particulate core-forming material in solid form, e.g. mineral particles or cured resin particles, as well as a mixture of water and a stabilizing agent, the amount of water being sufficient to exceed the water tolerance level of the aminoplast or phenoplast, and thus forming an emulsion or suspension of the resin coated particles in water, and advancing cure of the resin to form partially or fully cured resin coatings having a thickness preferably about 5-75 μm encapsulating the particulate core-forming material.Field of SearchIncluding synthetic resin or polymerPolymeric or resinous material Inorganic compound devoid of a silicon atom DNRM DNRM which is other than silicon dioxide, glass, titanium dioxide, water, halohydrocarbon, hydrocarbon, or elemental carbon PARTICLES, FLAKES, OR GRANULES COATED OR ENCAPSULATED Solid encapsulation process utilizing an emulsion or dispersion to form a solid-walled microcapsule (includes liposome) Hardening Inorganic base Resin, rubber, or hardenable oil containing coating | |
