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    • 5. 发明授权
    • Preparation of polymer based powder coatings by ionizing radiation
    • 通过电离辐射制备基于聚合物的粉末涂料
    • US4129489A
    • 1978-12-12
    • US899426
    • 1978-04-24
    • Roger M. ChristensonRostyslaw DowbenkoJoseph M. Makhlouf
    • Roger M. ChristensonRostyslaw DowbenkoJoseph M. Makhlouf
    • C08F2/54C08J3/12C09D5/03
    • C09D5/03C08F2/54
    • A novel method of preparing polymer based powder coating compositions involves as a first step the preparation of a mixture containing one or more ethylenically unsaturated monomers which are polymerizable by ionizing radiation, and optionally other coating composition additives. Optional additives which may be incorporated in the mixture include pigments, internal or external crosslinkers, chain transfer agents, flow promoters, plasticizers, viscosity control agents, minor proportions of resins, and the like. Pigments are especially desirable additives. The next step in the process is to apply a coating of the mixture to a substrate. Then, the coated substrate is subjected to ionizing radiation to polymerize the ethylenically unsaturated monomers and thereby form a solid film. Finally, the film is broken into particles by any of several mechanical means to form a polymer based powder coating composition which when applied to a substrate and baked, fuses to produce a film.This novel and convenient method is particularly suited to the preparation of pigmented and unpigmented thermoplastic or thermosetting acrylic polymer-based powder coating compositions which form films having excellent properties.
    • 制备基于聚合物的粉末涂料组合物的新方法包括作为第一步骤制备含有一种或多种可通过电离辐射聚合的烯属不饱和单体的混合物,以及任选的其它涂料组合物添加剂。 可以掺入混合物中的任选的添加剂包括颜料,内部或外部交联剂,链转移剂,流动促进剂,增塑剂,粘度控制剂,少量树脂等。 颜料是特别理想的添加剂。 该方法的下一步是将混合物的涂层施加到基底上。 然后,对被涂覆的基板进行离子化辐射以聚合烯属不饱和单体,从而形成固体膜。 最后,通过几种机械方法将膜破碎成颗粒,以形成基于聚合物的粉末涂料组合物,当将其施加到基材上并烘烤时,将其熔化以制备膜。
    • 9. 发明授权
    • Crosslinked acrylic polymer microparticles
    • 交联丙烯酸聚合物微粒
    • US4180619A
    • 1979-12-25
    • US934109
    • 1978-08-16
    • Joseph M. MakhloufSamuel Porter, Jr.
    • Joseph M. MakhloufSamuel Porter, Jr.
    • C08F2/08C08L75/04C08F220/06
    • C08F2/08C08L75/04Y10T428/2982
    • Crosslinked acrylic polymer microparticles having a particle size of from 0.1 to 10 microns are produced in relatively high concentrations by a method comprising the free radical addition copolymerization of at least one monoethylenically unsaturated monomer with alpha, beta-ethylenically unsaturated monocarboxylic acid and crosslinking monomer selected from the group consisting of (1) epoxy group-containing compound and (2) a mixture of alkylenimine and organoalkoxysilane in the presence of a dispersion stabilizer and an aliphatic hydrocarbon dispersing liquid in which the crosslinked polymer particles are insoluble.The crosslinked acrylic polymer microparticles are useful as additives to protective and decorative coatings.
    • 通过包含至少一种单烯属不饱和单体与α,β-烯属不饱和单羧酸的自由基加成共聚合和选自以下的交联单体的交联单体的方法,以相对高的浓度制备粒度为0.1至10微米的交联丙烯酸类聚合物微粒。 由(1)含环氧基的化合物和(2)在分散稳定剂和交联聚合物颗粒不溶的脂族烃分散液存在下的亚烷基亚胺和有机烷氧基硅烷的混合物组成的组。 交联的丙烯酸类聚合物微粒可用作保护性和装饰性涂料的添加剂。