Mainly used for special synthetic rubber, such as acrylic rubber and fluorine rubber cross-linking. Polyamine vulcanized fluorine rubber is characterized by the mechanical strength of vulcanized rubber, compressed water for a long time deformation of small, high-temperature long-term aging can still maintain good physical and mechanical properties, but easy to scorch, the processing safety adverse, and gradually developed a “closed
The decomposition of organic peroxides and their crosslinking are free radical reactions. As the curing agent peroxide should meet the storage stability, safe processing operations, do not cause scorch, to decomposition temperature can quickly decompose, high cross-linking efficiency requirements. With peroxide curing rubber, in general, with a short curing time, good thermal stability of vulcanized rubber, heat aging, low compression
Sulfur donors are those that release sulfur upon vulcanization and therefore may be sulfur-free or sulfur-less. Products are curing agent DTDM (disulfide dimorphorpholine), disulfide – N, N ‘- lactam, trisulfide bis (diethyl thiophosphoryl), four sulfide diporphorpholine, diethyl disulfide Thiocarbamate, thiocarbamate, thiocarbamate, rubber vulcanization accelerators TMTD, TMTM, TETD, TBTD, DDTS, PTD, DPTT, TBzTD, sulfur monochloride, carbon monoxide, alkylphenol monosulfide, alkylphenol disulfide,
Typical representative is sulfur, the rubber industry is the most basic and most important curing agent. The vulcanizing agent has the advantages of good comprehensive performance and low cost by using common sulfur-accelerator-activator system. Therefore, in the rubber industry, especially in the tire industry is still dominated. Insoluble sulfur to avoid sulfur, also not easy to burn, can be used
Vulcanizing agents can be divided into inorganic and organic two categories. 1.Inorganic vulcanizing agent. Sulfur, sulfur monochloride, selenium, tellurium and so on. 2.Organic curing agent. Sulfur-containing accelerators such as accelerator TMTD, organic peroxides such as benzoyl peroxide, quinone oxime compounds, polysulfide polymers, urethane, maleimide derivatives and the like. Rubber vulcanizing agents include elemental sulfur, selenium, tellurium, sulfur compounds, peroxides, quinone compounds,
Polyether defoamer is a non-ionic surfactant with excellent defoaming, anti-foaming function, non-toxic, insoluble in water, soluble in organic solvents, can be used alone, can also be used as emulsion, which GPE type Particularly suitable for fermentation industry, PPE suitable for high temperature use. The product has the advantages of polyether and silicone antifoaming agent, can defoaming and defoaming of different media, and
Mineral oil defoamers applied for all types of synthetic latex, in particular applied to rubber and plastics industry polymerization, condensation,degassing step,can eliminate foam produced by different surfactants in this system. And it can also be used in resins, water-based paint, latex paint, water-based ink, emulsion polymerization, polymer gel, lotion benzene Bing black liquor, petrochemical and all NA silicone defoamers industry.
Defoamers mostly be liquid complex products, mainly divided into three categories: mineral oil, organic silicon defoamer, polyether defoamer. Mineral oil defoaming agent is usually composed of a carrier, active agents. The carrier material is a low surface tension, and its function is to dilute bearing carriers commonly used water, alcohols and the like; the role of the active agent is
Continuous vulcanization of rubber products under high temperature and pressure conditions, due to the moisture in the role with Ji, the finished product often produce bubbles, not to make rubber products such bubbles during curing, should be thoroughly dried before mixing with Ji except for using, , the need to add anti-foaming agent in the rubber compound, the main component
Physical methods: 1. The easiest way is to feel, more slippery is false titanium dioxide, the true titanium dioxide is astringent. 2. Flush, hand dip titanium dioxide, fake easily wash away, really not easy to wash away. 3. Take a glass of water, throw into titanium dioxide, and rise is true, down precipitation is false. Chemical method: 1. Light mixed with calcium
