1171results about How to "High softening point" patented technology

Provided are a heat-resistant glass fiber which has excellent heat resistance, which is also easy to spin and less expensive and which is suitable as an acoustic material for use in an automobile muffler, and a process for the production thereof. The heat-resistant glass fiber has a composition comprising, substantially by weight %, 56 to 58.5% of SiO2, 12 to 17% of Al2O3, 16 to 27% of CaO, 1 to 9% of MgO, 0 to 1% of Na2O and 0 to 1% of K2O as the entirety of the fiber and containing neither B2O3 nor F2, and has a surface layer portion made of a silicic glass having an SiO2 content of at least 90% by weight. The process comprises treating the surface of the above fiber having the above composition with a mineral acid, to produce the heat-resistant glass fiber.

Disclosed is a SBS modified asphalt material which is prepared by using star form SBS and linear SBS composition as the modifier, whose consumption is 2.0-10.0% of the asphalt weight, the weight ratio of the star form SBS and linear SBS is 50 : 50-100 : 0.

A dual-compound multi-protective-layer roofing material includes a factory-applied layer of SBS-modified bitumen compound on a lower layer, an APP-modified bituminous on an upper layer, and a carrier sheet disposed between the SBS-modified lower layer and the APP-modified upper layer.

The invention more particularly relates to a method for preparing magnesia carbon brick non-aluminum antioxidant coating, which has the technical scheme of comprising the steps of: firstly mixing 40-60wt% of boron glass, 5-20wt% of SiC, 20-35wt% of fused quartz, 1-5wt% of MgO, 5-10wt% of CaO and 0.1-0.3% of carboxymethyl cellulose, and additionally adding ludox accounting for 20-40wt% of the mixed material or liquid water glass accounting for 40-60wt% of the mixed material, then additionally adding water accounting for 50-60wt% of the mixed material, carrying ball-milling for 20-40min, and preparing antioxidant paint; then, evenly painting the prepared antioxidant paint on the surface of a magnesia carbon brick, naturally drying and stoving at 110 DEG C; and finally, putting the stoved magnesia carbon brick in a high temperature furnace, heating up to 1150-1250 DEG C, carrying out heat preservation for 20-40min, and preparing the magnesia carbon brick non-aluminum antioxidant coating. The invention has the characteristics of simple technique and low cost, and can be glazed at the temperature range of 500-1200 DEG C; and the prepared magnesia carbon brick non-aluminum antioxidant coating has good anti-oxidation performance.

The invention discloses an ultraviolet curing adhesive comprising a resin main body, a dissolvent, an ultraviolet light initiator and an addition agent, wherein the resin main body is composed of a resin R and a resin H; the R resin is an active polyurethane acrylic resin with a main chain containing a polyether structure and a branch chain containing a vinyl optical active group as well as with a lower molecular weight; and the H resin is an inert polyurethane acrylic resin with a main chain containing a polydiene and aryloxide structure and with a relatively higher molecular weight. The adhesive contains no monomer or prepolymer, has high softening point, can be precoated on a base material, has super strong cohesive force on a high-oilness contact surface and has characteristics of high-temperature resistance, small internal stress and good flexibility.

The invention relates to an auxiliary material combination for improving atomizing and drying process of traditional Chinese medicine granules and an application thereof. The auxiliary material combination comprises 10 to 90 percent of betadex and 10 to 90 percent of maltodextrin or dextrine. The application of the auxiliary material combination is: after being dissolved in hot water, the auxiliary material combination is added into extract obtained by extracting Chinese medicine or is directly added into extract to be uniformly mixed and to be atomized and dried; when adding the auxiliary material combination, the temperature of the extract is 50 to 100 DEG C, relative density of the extract is 1.02 to 1.20 (60 DEG C), air inlet temperature for atomizing drying is 140 to 190 DEG C, and the air outlet temperature is 75 to 100 DEG C. by adopting the auxiliary material combination, under the same atomizing and drying condition, the consumed quantity of the auxiliary material is less, the consumption quantity of the auxiliary material can be reduced by more than 30 percent, the auxiliary material with the same quantity is added for atomizing and drying, the softening point of the extract can be improved during the atomizing and drying process, the wall is difficult to be adhered during the atomizing process, the fluidity of the atomizing and drying powder is good, the atomizing and drying powder is difficult to be moistened, the dispersion of the flavor can be effectively prevented during the atomizing and drying process, and the original flavor of the extract is maintained.

The invention discloses a fluorine-containing metal coating on the surface of an NdFeB rare-earth permanent magnet and a preparation method of the fluorine-containing metal coating, and belongs to the technical field of anticorrosion surface treatment. The fluorine-containing metal coating has the thickness of 5-40 microns and is prepared from polytetrafluoroethylene, solid powder and adhesive according to the mass ratio of (1-30):(2-30):(20-40). The preparation method includes the steps of firstly, preprocessing the surface of the NdFeB rare-earth permanent magnet through an oil removal and acid pickling or sand blasting method; secondly, preparing the coating through a centrifugal soaking and throwing or spraying method. Polytetrafluoroethylene contained in paint for preparing the coating has excellent corrosion resistance, and the corrosion resistant capacity of the surface of the NdFeB rare-earth permanent magnet can be improved; in the coating process, no acid bath is used, the fresh surface of the magnet is not damaged after preprocessing, and the surface adhesion force between the coating and the magnet can be effectively improved; no acid waste liquid exists, the environment is not polluted, and the preparation method belongs to the green and environment-friendly coating process.