71results about How to "Increase vulcanization rate" patented technology

The invention discloses sulfide tetrabenzyl thiuram and a preparation method and application thereof. The preparation method comprises the following steps: enabling dibenzylamine, sodium hydroxide and carbon disulfide to react in a solvent to generate an intermediate sodium dibenzyldithiocarbamape, then oxidizing the sodium dibenzyldithiocarbamape into the disulfide tetrabenzyl thiuram by use of hydrogen peroxide, and then desulfurizing the disulfide tetrabenzyl thiuram by use of hydrogen to obtain the sulfide tetrabenzyl thiuram. The sulfide tetrabenzyl thiuram disclosed by the invention is high in purity, high in melting point, and white in appearance, the vulcanization rate can be obviously accelerated, the sulfide tetrabenzyl thiuram can express good scorching security and fast vulcanization performance whether to increase the vulcanization temperature and change the sulfur dosage or to add the white carbon black, and the use of the sulfide tetrabenzyl thiuram has no bad influence to the physical performance of the sulfide rubber.

A rare earth rubber vulcanization accelerator, preparation method and application thereof are provided. The accelerator is composed of rare earth ion and carboxyl substituted dithiocarbamate. The preparation method comprises the following steps: dissolving amino acid in water, dropping CS2, stirring for reaction, adding rare earth compound to obtain precipitate, then filtering, washing and drying. There is no need to add other vulcanization activator (such as stearic acid and zinc oxide) when the accelerator is used to vulcanize rubber and the prepared rubber composite has excellent integrated mechanical property. Furthermore, the accelerator is a primary amine compound, and is environmentally friendly without nitrite generated during the vulcanization.

The invention relates to a preparation method of an antisepsis and anti-inflammation lubrication-type condom containing natural cinnamyl aldehyde. The preparation method of the antisepsis and anti-inflammation lubrication-type condom containing natural cinnamyl aldehyde particularly comprises the following steps of: coating cinnamyl aldehyde directly on a natural emulsion condom or butyronitrile emulsion condom finished product, or adding and dispersing a certain amount of cinnamyl aldehyde together with other conventional burdening uniformly into the natural emulsion or butyronitrile emulsion in raw material prevulcanization process of the natural emulsion condom or the butyronitrile emulsion condom; then steeping and forming a natural emulsion glove condom or a butyronitrile emulsion condom which comprises natural cinnamyl aldehyde by a conventional forming technology; and then performing edge curling, chloridizing, foam-washing, rinsing and drying, thereby obtaining a finished product. The condom prepared by the method has the function of antisepsis and anti-inflammation, lubricating and skin protection; and meanwhile cinnamyl aldehyde can emit fragrant flavor, and can eliminate peculiar smell secreted by human bodies, is simple in technology, is low in cost, also saves resources, and improves the production efficiency.