摘要:
1. AN ANTIFRICTION MATERIAL CONSISTING ESSENTIALLY OF A GRAPHITE POWDER, A BINDER FOR SAID GRAPHITE, TAKEN IN AN AMOUNT OF 22-30% BY WEIGHT OF THE GRAPHITE POWDER AND CONSISTING OF PHENOL-FORMALDEHYDE RESIN, SAID GRAPHITE POWDER AND SAID BINDER TOGETHER BEING 30-95 WT. PERCENT OF SAID MATERIAL; 3% BY WEIGHT OF THE BINDER OF AN ADDITIVE SAID ADDITIVE CONSISTING ESSENTIALLY OF HEXAMETHYLENETETRAMINE, STEARINE AND CALCIUM HYDROXIDE; A POWDER OF A PLASTIC NON-FERROUS METAL, SELECTED FROM THE GROUP CONSISTING OF LEAD AND TIN, 0-60 WT. PERCENT OF SAID MATERIAL; PHENOL-ANILINEFORMALDEHYDE RESIN, 5-40 WT. PERCENT OF SAID MATERIAL; AND A FINELY DISPERSED POWDER OF AN ABRASIVE MATERIAL, SELECTED FROM THE GROUP CONSISTING OF TALC, GLASS, SILICA, AND CHROMIUM OXIDE, 0.5-5 WT. PERCENT OF SAID MATERIAL.
摘要:
A TEXTILE ASSISTANT AND METHOD OF USING SAME WHICH COMPRISES APPLYING TO A TEXTILE FABRIC AN AQUEOUS EMULSION CONTAINING AS THE TEXTILE ASSISTANT, A POLYESTER PREPARED FROM THE REACTION OF POLYOLS SUCH AS GLYCOLS WITH A DIBASIC OR TRIBASIC ACID HAVING FROM ABOUT 6 TO ABOUT 54 CARBON ATOMS, PREFERABLY A DIMERIZED FATTY ACID. WHEN TRIBASIC ACIDS ARE USED, A GLYCOL SHOULD BE EMPLOYED AND WHEN TRIOLS ARE USED, DIBASIC ACIDS SHOULD BE EMPLOYED.
摘要:
An ester of an acidic oxidized polyethylene wax and, for example, a polyhydric alcohol of a chain length of 2-5 carbon atoms, wherein the acid number of the oxidized polyethylene wax is, prior to esterification, 10-35 and the acid number of the wax ester is 8 or less, is useful as a lubricant for plastics processing, especially for rolling and calendering unplasticized PVC into sheeting.
摘要:
A solid lubricant adhesive film used in the preparation of sealed, nonseizing threaded joints is composed of an adhesive film, such as the type of adhesive film used in transfer tapes, one side of which has been impregnated with a finely powdered solid lubricant, such as molybdenum disulfide or graphite. The solid lubricant adhesive film is wrapped around the threaded portion of a male fitting of a threaded joint, adhesive side down, and then the threaded portions, male and female, of the joint are screwed together and tightened to form a sealed, nonseizing joint.
摘要:
An oil-containing or lubricant-containing molded plastic composition comprising a lubricant adsorbent carrier having a surface area of at least 0.01 m2/g, and being selected from the group consisting of a non-fusible naturally occurring inorganic powder, a synthetic high molecular weight material, a naturally occurring high molecular weight material, and mixtures thereof in admixture with a lubricant, said carrier being blended with a base plastic material selected from the group consisting of a synthetic resin and a mixture of at least two synthetic resins is disclosed.
摘要:
A GREASE COMPOSITION CONSISTING OF A SYNTHETIC ESTER THICKENED TO A GREASE-LIKE COMPOSITION WITH BENTONITE CLAY, WHEREIN A PYROGENTIC SILICA AGENT IS ADDED THERETO.
摘要:
A friction material member particularly useful in high load and temperature applications and a method for making the same are disclosed. The friction material member is made by preparing a mixture of sinterable metal particles, carbonaceous material, friction enhancers and curable polymeric resin; the mixture comprising at least about 50 percent by weight of metal particles and sufficient resin to coat and bond the metal particles, carbonaceous material and friction enhancers. The mixture is molded and the resin cured to form a piece in a solid preformed shape corresponding to the shape of the mold. Thereafter, the preformed piece is heated in a substantially oxygen free atmosphere for a time and at temperatures and pressures sufficient to fuse at least a portion of the metal particles into a sintered metal matrix. The preformed piece may be sintered to a metal backing plate during the heating step, or may be welded, brazed or soldered to the plate after heating. The resulting product may be classified as a hybrid friction material, i.e., being a cross between semi-metallic and sintered full metallic friction materials.
摘要:
CERTAIN CALCIUM SALTS OF PARTIALLY HYDROLYZED POLYACRYLONITRILE ARE USED TO TREAT LOW-SOLIDS WELL DRILLING FLUID IN COMBINATION WITH CERTAIN WATER-SOLUBLE SALTS SUCH AS SODIUM CARBONATE TO REDUCE FLUID LOSS IN SUCH A WAY THAT FLUID LOSS CHARACTERISTICS DO NOT CHANGE WHEN CALCIUM OR OTHER METAL IONS HAVING A VALENCE OF AT LEAST TWO ARE ENCOUNTERED DURING DRILLING. THE MATERIAL IS ESPECIALLY USEFUL IN TREATING CERTAIN POLYMER-TREATED DRILLING MUD.