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    • 7. 发明授权
    • High concentration encapsulation by interfacial polycondensation
    • 通过界面缩聚进行高浓度封装
    • US4563212A
    • 1986-01-07
    • US566108
    • 1983-12-27
    • David Z. BecherRalph W. Magin
    • David Z. BecherRalph W. Magin
    • A01N25/28B01J13/16A01N37/18
    • B01J13/16A01N25/28
    • This invention relates to a process for encapsulation, and particularly to the production of small or minute capsules constituted by a skin or thin wall of polymeric material e.g., polyurea, polyamide, polysulfonamide, polyester, polycarbonate, or polyurethane, which involves first providing an aqueous solution (continuous phase liquid) containing an emulsifier selected from the group consisting of sulfonated napthalene formaldehyde condensates, sulfonated polystyrenes derivatives and functionalized oligomers. A discontinuous (immiscible or organic) phase liquid containing a water-immiscible material which is the material to be encapsulated, plus a first shell wall component; is dispersed in the aqueous liquid to form an oil-in-water emulsion. The second shell wall component is added to the oil-in-water emulsion whereupon the first shell wall component reacts with the second shell wall component to form a solid polycondensate shell wall about the material to be encapsulated. The capsules formed may be directly used as in the form of an aqueous suspension.
    • 本发明涉及一种封装方法,特别是涉及由聚脲材料(例如聚脲,聚酰胺,聚磺酰胺,聚酯,聚碳酸酯或聚氨酯)聚合物的表皮或薄壁构成的小或微胶囊的生产方法,其首先提供水性 溶液(连续相液体),其含有选自磺化萘甲醛缩合物,磺化聚苯乙烯衍生物和官能化低聚物的乳化剂。 包含作为被包封的材料的水不混溶材料的不连续(不混溶或有机)相液体,以及第一壳壁组分; 分散在水性液体中以形成水包油乳液。 将第二壳壁组分添加到水包油乳液中,于是第一壳壁组分与第二壳壁组分反应以形成围绕待包封材料的固体缩聚物壳壁。 形成的胶囊可以以水性悬浮液的形式直接使用。
    • 8. 发明授权
    • Pigment dispersants for coating compositions
    • 用于涂料组合物的颜料分散剂
    • US4302561A
    • 1981-11-24
    • US178207
    • 1980-08-14
    • David Z. BecherRoger M. ChristensonRichard L. CoalsonPercy E. PierceKarl F. Schimmel
    • David Z. BecherRoger M. ChristensonRichard L. CoalsonPercy E. PierceKarl F. Schimmel
    • C08F8/00C09B67/46C09D7/45C08F220/34
    • C09D7/02C08F8/00C09B67/0091
    • Pigment dispersants for use in coating compositions wherein the dispersant is the polymerization product of (i) an alkyl methacrylate having from 3 to 8 carbon atoms in the alkyl group, (ii) a hardening monomer selected from the group consisting of a styrene, methyl methacrylate, ethyl methacrylate and mixtures thereof, (iii) an ethylenically unsaturated carboxylic acid selected from the group consisting of acrylic acid, methacrylic acids, itaconic acid, crotonic acid, maleic acid, fumaric acid and mixtures thereof or a monomer having a double bond alpha-beta to a carbonyl group and which provides carboxyl functionality when reacted with water, alcohol, amine or anhydride, (iv) a monomer having a double bond alpha-beta to a carbonyl group and at least one hydroxyl group or a monomer which provides such groups when further reacted with an acid or an epoxide, and (v) a compound providing an amine or amine salt functional moiety. The dispersants are useful for dispersing pigments in coating compositions containing a wide variety of film-forming resins.
    • 用于涂料组合物的颜料分散剂,其中分散剂是(i)烷基中具有3-8个碳原子的甲基丙烯酸烷基酯的聚合产物,(ii)选自苯乙烯,甲基丙烯酸甲酯 ,甲基丙烯酸乙酯及其混合物,(iii)选自丙烯酸,甲基丙烯酸,衣康酸,巴豆酸,马来酸,富马酸及其混合物的烯属不饱和羧酸或具有双键α-烯烃的单体, 当与水,醇,胺或酸酐反应时提供羧基官能团,(iv)具有羰基和至少一个羟基的双键α-β的单体或提供这种基团的单体 当与酸或环氧化物进一步反应时,和(v)提供胺或胺盐官能部分的化合物。 分散剂可用于将颜料分散在含有多种成膜树脂的涂料组合物中。