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    • 2. 发明申请
    • Process for production of clay nanocomposite
    • 粘土纳米复合材料生产工艺
    • US20080146719A1
    • 2008-06-19
    • US11641513
    • 2006-12-19
    • Xiaoping YangJoseph John KuligDane Kenton Parker
    • Xiaoping YangJoseph John KuligDane Kenton Parker
    • C08K3/00
    • B60C1/0025B60C1/0008B60C1/0016C08K3/346C08L9/06
    • A process of preparing a nanocomposite comprised of an elastomer and at least partially exfoliated, intercalated water-swellable clay, comprising the steps of (A) forming a first blend of water-swelled clay and anionic polymer particle emulsion by blending: (1) an aqueous mixture comprised of water and a multilayered water-swellable clay, exclusive of an intercalant for said clay, wherein said water-swellable clay is comprised of a plurality of stacked platelets with water-expanded galleries between said platelets, wherein said galleries contain naturally occurring cationic ion exchangeable ions therein, and (2) an emulsion of anionic synthetic vinylpyridine-styrene-butadiene terpolymer (VPSBR) elastomer particles as an aqueous pre-formed elastomer emulsion having a pH in a range of from about 6 to about 11, comprised of anionic elastomer particles (elastomer particles having anions on the surface derived from an anionic surfactant) prepared by aqueous free radical induced polymerization of monomers in the presence of a free radical generating polymerization initiator and non-polymerizable anionic surfactant, wherein said synthetic elastomer particles are derived from an aqueous polymerization of said monomers comprising from about 0.1 to about 40 weight percent of styrene, from about 60 to about 100 weight percent of 1,3-butadiene, and from about 0.1 to about 8 percent by weight of vinylpyridine monomers which have the structural formula: wherein R1 represents a hydrogen atom or a straight chain or branched alkyl group containing 1 to 4 carbon atoms; and (B) blending with said first blend an aqueous mixture comprised of water and inorganic acid having a pH in a range of about 1 to about 4.
    • 一种制备由弹性体和至少部分剥离的插层的水溶胀性粘土组成的纳米复合材料的方法,包括以下步骤:(A)通过以下步骤形成水溶胀粘土和阴离子聚合物颗粒乳液的第一共混物:(1) 由水和多层水溶胀性粘土组成的水性混合物,不包括用于所述粘土的插入剂,其中所述水溶胀性粘土由在所述血小板之间的多个具有水膨胀图案的层叠血小板组成,其中所述画廊含有天然存在的 阳离子可离子交换离子,和(2)阴离子合成乙烯基吡啶 - 苯乙烯 - 丁二烯三元共聚物(VPSBR)弹性体颗粒的乳液,其为具有约6至约11范围内的pH的水性预形成弹性体乳液,包含 阴离子弹性体颗粒(由阴离子表面活性剂衍生的表面上具有阴离子的弹性体颗粒)通过自由基水溶液聚合制备 在产生自由基的聚合引发剂和非可聚合阴离子表面活性剂的存在下,单体的聚合反应,其中所述合成弹性体颗粒衍生自所述单体的水聚合,所述单体包含约0.1至约40重量%的苯乙烯,约60至 约100重量%的1,3-丁二烯和约0.1至约8重量%的具有以下结构式的乙烯基吡啶单体:其中R 1表示氢原子或直链或支链 含有1至4个碳原子的烷基; 和(B)与所述第一共混物混合由水和无机酸组成的含水混合物,其pH在约1至约4的范围内。
    • 4. 发明授权
    • Dibenzyltrithiocarbonate molecular weight regulator for emulsion polymerization
    • 用于乳液聚合的二苄基二硫代碳酸酯分子量调节剂
    • US06369158B1
    • 2002-04-09
    • US09470413
    • 1999-12-22
    • Michael Leslie SenyekJoseph John KuligDane Kenton Parker
    • Michael Leslie SenyekJoseph John KuligDane Kenton Parker
    • C08F240
    • C08F212/08C08F236/10C08F2438/03C08F2/38
    • Mercaptans are normally used as chain transfer agents in emulsion polymerizations. The mercaptans used in commercial applications are typically complex mixtures of hundreds of similar compounds having boiling points within a narrow range. The chain transfer activity of different mercaptans with such mixtures can vary substantially. To further complicate the situation, the distribution of various mercaptans can also vary substantially between lots of material obtained from commercial sources. Thus, consistent molecular weight control is typically difficult to attain in free radical emulsion polymerizations. This invention is based upon the unexpected discovery that dibenzyltrithiocarbonate will act as a pure compound to effectively and consistently control molecular weight in free radical emulsion polymerizations. The polydispersity of polymers made using dibenzyltrithiocarbonate as a molecular weight regulator is similar to that obtained using conventional mercaptan systems. This invention more specifically discloses a process for controlling the molecular weight of a polymer synthesized by free radical emulsion polymerization that comprises polymerizing at least one monomer by free radical polymerization in an aqueous emulsion in the presence of dibenzyltrithiocarbonate. For instance, dibenzyltrithiocarbonate can be used as a molecular weight regulator in the synthesis of styrene-butadiene rubber by emulsion polymerization. Accordingly, this invention further discloses a process for synthesizing styrene-butadiene rubber (SBR) that comprises copolymerizing styrene monomer and 1,3-butadiene monomer by free radical polymerization in an aqueous emulsion in the presence of dibenzyltrithiocarbonate. The use of dibenzyltrithiocarbonate is inherently less odorous than the use of mercaptans.
    • 硫醇通常用作乳液聚合中的链转移剂。 在商业应用中使用的硫醇通常是沸点在几个范围内的数百种类似化合物的复杂混合物。 具有这种混合物的不同硫醇的链转移活性可以显着变化。 为了进一步使情况复杂化,各种硫醇的分布也可以在从商业来源获得的许多材料之间显着变化。 因此,在自由基乳液聚合中通常难以获得一致的分子量控制。 本发明基于意想不到的发现,即二苄基三硫代碳酸酯将用作纯化合物以有效且一致地控制自由基乳液聚合中的分子量。 使用二苄基三硫代碳酸酯作为分子量调节剂制备的聚合物的多分散性与使用常规硫醇体系获得的聚合物相似。 本发明更具体地公开了一种控制通过自由基乳液聚合合成的聚合物的分子量的方法,该方法包括在二苄基三硫代碳酸酯的存在下,在水乳液中通过自由基聚合使至少一种单体聚合。 例如,二苄基三硫代碳酸酯可以用作通过乳液聚合合成苯乙烯 - 丁二烯橡胶中的分子量调节剂。 因此,本发明还公开了一种合成苯乙烯 - 丁二烯橡胶(SBR)的方法,其包括在二苄基三硫代碳酸酯存在下,在水性乳液中通过自由基聚合共聚苯乙烯单体和1,3-丁二烯单体。 使用二苄基三硫代碳酸酯本身不如使用硫醇少。
    • 5. 发明授权
    • Surfactantless synthesis of amphiphilic cationic block copolymers
    • 两亲性阳离子嵌段共聚物的无表面活性合成
    • US07671152B2
    • 2010-03-02
    • US11583424
    • 2006-10-19
    • Dane Kenton ParkerJoseph John Kulig
    • Dane Kenton ParkerJoseph John Kulig
    • C08F2/00C08F236/00
    • C08F293/005C08F293/00C08F2438/03C08L53/00C08L53/02C08L2666/02
    • The present invention is directed to a method of producing an amphiphilic block copolymer, including the steps of: (1) preparing a first aqueous polymerization medium which is comprised of (a) 4-vinylpyridine, (b) a trithiocarbonate RAFT agent, and an emulsifier, wherein the emulsifier is prepared in-situ within the aqueous polymerization medium by the reaction of a latent surfactant with a surfactant activator; (2) polymerizing the 4-vinylpyridine within the first aqueous polymerization medium in the presence of a first free radical initiator to produce a poly(4-vinylpyridine); (3) protonating the poly(4-vinylpyridine) to form a protonated poly(4-vinylpyridine) RAFT macroinitiator; (4) preparing a second aqueous polymerization medium which is comprised of the protonated poly(4-vinylpyridine) RAFT macroinitiator and a monomer containing ethylenic unsaturation but is exclusive of a surfactant; and (5) polymerizing the protonated poly(4-vinylpyridine) RAFT macroinitiator and monomer containing ethylenic unsaturation within the second aqueous medium in the presence of a second free radical initiator and a temperature less than 100° C. to produce an amphiphilic block copolymer of the 4-vinylpyridine and monomer containing ethylenic unsaturation.
    • 本发明涉及一种制备两亲性嵌段共聚物的方法,包括以下步骤:(1)制备第一种水性聚合介质,其包含(a)4-乙烯基吡啶,(b)三硫代碳酸酯RAFT试剂和 乳化剂,其中乳化剂通过潜在表面活性剂与表面活性剂活化剂的反应在水性聚合介质中原位制备; (2)在第一含水聚合介质中在第一自由基引发剂存在下聚合4-乙烯基吡啶以产生聚(4-乙烯基吡啶); (3)使聚(4-乙烯基吡啶)质子化以形成质子化的聚(4-乙烯基吡啶)RAFT大分子引发剂; (4)制备由质子化的聚(4-乙烯基吡啶)RAFT大分子引发剂和含有烯属不饱和单体但不包括表面活性剂的单体组成的第二水性聚合介质; 和(5)在第二自由基引发剂和低于100℃的温度存在下,在第二水性介质中聚合质子化聚(4-乙烯基吡啶)RAFT大分子引发剂和含有烯属不饱和单体的单体,以产生两亲性嵌段共聚物 4-乙烯基吡啶和含有烯属不饱和单体的单体。
    • 6. 发明申请
    • Surfactantless synthesis of amphiphilic cationic block copolymers
    • 两亲性阳离子嵌段共聚物的无表面活性合成
    • US20070149709A1
    • 2007-06-28
    • US11583424
    • 2006-10-19
    • Dane Kenton ParkerJoseph John Kulig
    • Dane Kenton ParkerJoseph John Kulig
    • C08F297/02
    • C08F293/005C08F293/00C08F2438/03C08L53/00C08L53/02C08L2666/02
    • The present invention is directed to a method of producing an amphiphilic block copolymer, including the steps of: (1) preparing a first aqueous polymerization medium which is comprised of (a) 4-vinylpyridine, (b) a trithiocarbonate RAFT agent, and an emulsifier, wherein the emulsifier is prepared in-situ within the aqueous polymerization medium by the reaction of a latent surfactant with a surfactant activator; (2) polymerizing the 4-vinylpyridine within the first aqueous polymerization medium in the presence of a first free radical initiator to produce a poly(4-vinylpyridine); (3) protonating the poly(4-vinylpyridine) to form a protonated poly(4-vinylpyridine) RAFT macroinitiator; (4) preparing a second aqueous polymerization medium which is comprised of the protonated poly(4-vinylpyridine) RAFT macroinitiator and a monomer containing ethylenic unsaturation but is exclusive of a surfactant; and (5) polymerizing the protonated poly(4-vinylpyridine) RAFT macroinitiator and monomer containing ethylenic unsaturation within the second aqueous medium in the presence of a second free radical initiator and a temperature less than 100° C. to produce an amphiphilic block copolymer of the 4-vinylpyridine and monomer containing ethylenic unsaturation.
    • 本发明涉及一种制备两亲性嵌段共聚物的方法,包括以下步骤:(1)制备第一种水性聚合介质,其包含(a)4-乙烯基吡啶,(b)三硫代碳酸酯RAFT试剂和 乳化剂,其中乳化剂通过潜在表面活性剂与表面活性剂活化剂的反应在水性聚合介质中原位制备; (2)在第一含水聚合介质中在第一自由基引发剂存在下聚合4-乙烯基吡啶以产生聚(4-乙烯基吡啶); (3)使聚(4-乙烯基吡啶)质子化以形成质子化的聚(4-乙烯基吡啶)RAFT大分子引发剂; (4)制备由质子化的聚(4-乙烯基吡啶)RAFT大分子引发剂和含有烯属不饱和单体但不包括表面活性剂的单体组成的第二水性聚合介质; 和(5)在第二自由基引发剂和低于100℃的温度存在下,在第二水性介质中聚合质子化聚(4-乙烯基吡啶)RAFT大分子引发剂和含有烯属不饱和单体的单体,以产生两亲性嵌段共聚物 4-乙烯基吡啶和含有烯属不饱和单体的单体。