EPOXY BINDING AGENT, THE PREPREG PRODUCED ON ITS BASE AND THE PRODUCT MADE OUT OF THE PREPREG Russian patent published in 2007 - IPC C08L63/00 C09J163/00 C08J5/24 B32B27/38 C08G59/14 

FIELD: chemical industry; aircraft industry; space industry; radioelectronic industry; other industries; production of the epoxy binding agent, the prepreg on its base and the product made out of the prepreg.

SUBSTANCE: the invention is pertaining to production of the epoxy binding agent, the prepreg on its base and the product made out of the prepreg, which may be used as the construction material in the aircraft industry, space industry, radio electronics and other industries. The epoxy binding agent also may be used as the basis in production of the glues, the paint-and-lacquer coatings, the potting compounds, the sealing compounds, the gel coatings. The binding agent includes the following ratio of the components (in mass shares): 50.0-100.0 - the multifunctional epoxy resins, 1.5-3.6 - the curing agent and 30.0-50.0 - the product of interaction of the epoxy isopropylidenediphenol pitch or the mixtures of the epoxy isopropylidenediphenol pitches with the compound selected from the group including: the product of the polycondensation of glycols with dimethyl terephthalate, phenol-formaldehyde pitch, butadiene acrylicnitrile caoutchouck or their combination. As the multifunctional epoxy resin the binding agent contains epoxytriphenol or epoxy-novolak resin; as the curing agent - the complex compound of boron trifluoride with benzylamine. In addition the binding agent contains the organic solvent. The prepreg includes the following ratio of the components (in mass %): 30.0-50.0 - of the above indicated epoxy binding agent and 50.0-70.0 - of the fibrillar filler. The product is produced by forming of the prepreg. The invention allows to create the binding agent, which has the high level and stability of the adhesion power to the filler, the low value of the internal stresses of the polymeric composite material at the cyclic action of the water-drying process at the temperature of 70°С, to increase the strength of the products at the action of the operational factors.

EFFECT: the invention ensures creation of the binding agent obtaining the high level and stability of the adhesion to the filler, the low value of the internal stresses of the polymeric composite material at the cyclic action of the water-drying process at the rather high temperature, to increase the strength of the products at the action of the operational factors.

5 cl, 3 tbl, 7 ex