Abstract:
A grease composition for use as a cable filling material which contains about 75 to 95 parts by weight of a base component of a polyol or ester having a molecular weight of at least about 3000 and about 2 to 20 parts by weight of colloidal particles such as silica. Optionally, an antioxidant component can be added to impart high temperature resistance or a rubber component can be added to improve bleed resistance. Also, an article of manufacture of a cable having a sheath with one of the grease compositions of the invention located therein, and a method for filling the cable with such grease compositions.
Abstract:
A process for producing an organophilic clay comprises: (a) milling and refining a raw clay selected from the group of smectite clays in order to obtain a milled and refined clay; (b) replacing the exchangeable cations of the refined clay with sodium or ammonium cations, by means of a cation-exchange treatment; (c) contacting the cation-exchanged clay with a sulfonated condensed-ring polycyclic aromatic compound in order to obtain an organophilic clay; and (d) recovering the organophilic clay from the products obtained from the preceding (c) step. The so obtained organophilic clay is particularly useful as a thixotropic agent in organic vehicles, in particular in oil-base drilling muds.
Abstract:
Thixotrope Zubereitungen in unterschiedlichsten Anwendungsbereichen enthalten Siliciumdioxid als verdickende oder thixotropierende Komponente, die flüssigen Systemen zugesetzt ist. In manchen Zubereitungen neigt die Kieselsäure zum Absetzen. In Zubereitunggen, welche selbst stärkere H-Brückenbildungen ausbilden, kann der Thixotropie gebende Effekt von SiO₂ wesentlich geschwächt werden. Die neuen thixotropen Zubereitungen sollen Hilfsmittel enthalten, die das Siliciumdioxid aktivieren bzw. dessen Wirkung verstärken. Die thixotropen Zubereitungen mit einem Gehalt an hochdispersem Siliciumdioxid enthalten als zusätzliche Komponente hydroxyfunktionelle Carbonsäureamide der Formel I Verwendung der Verbindungen der Formel I zum Thixotropieren von flüssigen Zubereitungen und hochdisperses Siliciumdioxid, das mit Verbindungen der Formel I beschichtet ist.
[상기 화학식에서, R 1 은 동일하거나 상이한 1가 탄화수소 그룹을 나타내며; X는 동일하거나 상이한 1가 탄화수소 그룹 또는 화학식 -R 2 -SiR 1 a (OR 3 ) (3-a) (여기서, R 1 은 앞서 언급한 그룹을 나타내며, R 2 는 산소 원자 또는 알킬렌 그룹을 나타내고, R 3 은 알킬 그룹을 나타내며, "a"는 0 내지 2 범위의 정수이다)의 알콕시실릴-함유 그룹을 나타내고; "m" 및 "n"은 각각 0 이상의 정수이다] 열전도성 충전제(B) 및 양 분자 말단 및 분자 쇄에 규소-결합된 수소 원자를 갖는 오가노폴리실록산(C) 를 적어도 포함하는, 열전도성 실리콘 그리스 조성물은 우수한 내열성 및 감소된 오일 블리딩(oil bleeding)을 특징으로 한다.
Abstract:
A thermally conductive silicone grease composition comprising at least the following components: an organopolysiloxane (A) represented by the following general formula: [wherein R1 designates identical or different univalent hydrocarbon groups; X designates identical or different univalent hydrocarbon groups or alkoxysilyl-containing groups of the following general formula: —R2—SiR1a(OR3)(3-a) (wherein R1 designates the previously mentioned groups; R2 designates oxygen atoms or alkylene groups; R3 designates alkyl groups; and ‘a’ is an integer ranging from 0 to 2); and ‘m’ and ‘n’ are integers equal to or greater than 0, respectively]; a thermally conductive filler (B); and an organopolysiloxane (C) having silicon-bonded hydrogen atoms on both molecular terminals and in the molecular chains; is characterized by excellent resistance to heat and reduced oil bleeding.
Abstract:
A grease composition for use as a cable filling material which contains about 75 to 95 parts by weight of a base component of a polyol or ester having a molecular weight of at least about 3000 and about 2 to 20 parts by weight of colloidal particles such as silica. Optionally, an antioxidant component can be added to impart high temperature resistance or a rubber component can be added to improve bleed resistance. Also, an article of manufacture of a cable having a sheath with one of the grease compositions of the invention located therein, and a method for filling the cable with such grease compositions.
Abstract:
Grease compositions including borated epoxides as friction-reducing additives, are thickened with a proportion of metal hydroxy-containing soap grease thickener. Such compositions have unexpectedly high dropping points.
Abstract:
Grease compositions, wherein the grease is thickened with a metal hydroxyl-containing soap grease thickener are provided. Other essential ingredients of the compositions include borated hydrocarbyl epoxides and phosphorus and sulfur moieties.