SU724539A1 - Molded electroinsulating glass-filled press-material - Google Patents

Description

The invention relates to the production of composite materials based on olgomeric binder and glass filler, used for electrical engineering products by injection molding. The glass fiber material DSV-2 (4) -P-2M, which is dosed on fiberglass, is known. calcium stearate (T, Material DSV-2 (4) -R-2M contains ;, wt.%: Rezol Fenoloformaldehyde oligomer 38 4 2 0.2 Caldi stearate Fiberglass 61.8 + 2 filler Physicomechanical properties of the material DSV- 2 (4) -R-2M are the following: breaking voltage and compression 13OO kgf / cm and when bending 1200 kgf / cm, impact strength 35 kgf cm / cm, specific surface and volume electrical resistance, respectively, and 10 Ω-cm, the viscosity at and the shear rate O, O14 s is 280- U P, the duration of the plasticity under the same conditions is 60 seconds, and the time for complete curing is 2 ° C. The disadvantage is that the material does not have high physical-mechanical and dielectric properties. High viscosity, short plasticity period, longer duration of complete curing of obstacles, comfortable use. It is for processing by injection molding. The closest to the proposed technical solution is the molded electrically insulating stockpile with a full-fledged press material, which includes, wt.%: Emulsion Novolac phenol-formaldehyde 38, 0-40.0 per resin. Calcium stearate 1.3-1.5 Pigment blue phthalo0, 2-0.3 cyanine Urotropin, 6,, 5 Lime 0.4-O, 8 Asbestos finely ground 5,, 0 Brown wax 0.5-0.7 Fiberglass, finely crushed alkaline-free The known material has high technological and electrical insulating properties. The disadvantage of the known material is that it does not have sufficiently high physical and mechanical properties. The purpose of the invention is to improve the physical and mechanical properties of the material. The goal is achieved by the fact that the press material, which includes new phenol-formaldehyde resin, urotropin, calcium stearate, contains a cutting length of 7-10 mm, the target additive is aerosil and add oligooxytetramethylene glycol forms OH-CH "-CH" - CH “-CH - (- O-CH-CH" 2 -CH, “.) -OH, 1 g p where P is 14-16 with the ratio of components, weight. Novol.accine phenol-formal48-55 degidna resin Urotropin Calcium stearate 0.1-0.3 Aerosil 0.35-0.75 Fiberglass 35-45 Oligooxytetramethylene0, 35-0.75 GLYCOLB Table. 1 shows the composition of the press materials. The composite glass-fiber material is prepared according to the known technology used to obtain (4) a solution of the binder in acetone is applied to the multifilament yarn, which is then dried, the resulting rod is cut into granules with a length of 7-10 mm. To study the physicomechanical and dielectric properties of composite glass-fiber material, standard samples were prepared by pressing, the test results are given in Table. 2. From the table it can be seen that the obtained samples have higher physicomechanical and dielectric properties. In addition, composite glass-fiber material has casting properties. J T a b pi c in 1

55.20 51.65 51.5 O 51.25 48.2 O

97.30 7.30 7.305

.

0.35 0.350.50 0.75 0.75

0.35 0.500.50 0.50 0.75

354О4О4045

Claims (1)

SUMMARY OF THE INVENTION Injection molding insulating glass-filled press material containing novolac phenol-formaldehyde resin, 45 urotropin, calcium stearate, a targeted additive and chopped non-fiber glass fiber, characterized in that, in order to increase the physicomechanical characteristics of the material, it contains 50 glass fibers with a cutting length of 7-10 mm, as a target additive - Aerosil and optionally oligooxytetramethylene glycol of the formula T OH -CH-CH _z -CH _z - (- O-CH-CH ^ -CH ^ -one, ⁵⁵ where η = 14-16 at the following component ratio, wt.%: Phenoloformal novolac - dehydrated resin Urotropin Calcium stearate Aerosil Fiberglass Oligoxytetramethylene glycol 48-55 5-9 Oh, 1-0.3 0.35-0.75 35-45 0.35-0.75