SU681078A1 - Polymer composition for making small-scale models of concrete structures - Google Patents

Description

The invention relates to polymer compositions intended for the manufacture of small-scale models, concrete structures, such as dams and the like, which are used to study the behavior of real objects under various operating conditions.

The known polymer composition for the manufacture of small-scale models of concrete structures, containing oligodienurethane epoxide, epoxy resin, polyoxypropylene triperepoxide, amine hardener and filler — phenol-formaldehyde microspheres in combination with quartz 1.

However, the known composition has low casting properties (it cannot be poured with a thin layer), as well as insufficiently high strength and adhesive characteristics, which makes it impossible to use it, for example, to simulate seams in full-scale objects.

The purpose of the invention is to reduce the viscosity of the composite and increase its strength and adhesive characteristics.

The goal is achieved by the fact that the composition, including oligodienurethanedioepoxide, epoxy resin, polyoxypropylene tripepoxide, a hardening agent and a filler, contains benzyl cello powder as a filler in the following ratio of components, wt.%: Oligodurene ethoxbe, as a filler, contains benzyl cellose in the following ratio of components, wt.%: Oligodurene ethoxbe, as a filler, contains benzyl cellose in the following ratio of components, wt.%: Oligodurene ethoxbe, as a filler, contains benzyl cellose in the following ratio of components, wt.%: Oligodurene ethoxbe, as a filler, contains benzyl cellose in the following ratio of components, wt.%: Oligodurene ethoxbe, as a filler, contains benzyl cellose in the following ratio of components, wt.%: Oligodurene ethoxbe, as a filler, contains benzyl cellosis in the following ratio of components, wt.%: Oligodurentroxpid; 6-34.0 Polyoxypropylene tri-epoxide 6.8-21.9 Amine hardener5, 1-9.3 Benzyl cel yloza 5.0-9.3.

Example. Epoxy resin (ED-20) is mixed with polyoxypropylene triperepoxide (TE-1500), after which oligodienurethanedioepoxide (PDI-VAK) and polyethylene polyamine (PEPA) are introduced. After thorough mixing, add benzylcellulose to the resulting mixture. The mixture is poured into molds lubricated with release agent and cured for 15 days at room temperature.

Examples of compositions and properties of model materials are given in Table 1, where E is the modulus of elasticity; J is the Poisson's ratio; (- logarithmic damping decrement; R - tensile strength.

The properties of the obtained compositions in comparison with the properties of the known are given in table 2.

To evaluate the adhesion characteristics of the compositions obtained, they glued together samples of materials, semi-810784

from a known composition. In all cases, the rupture was cohesive, i.e. adhesion of the compositions obtained is higher than the strength of the known model material.

5 Thus, the introduction of powdered benzyl cellulose into the composition of the composition makes it possible to preserve the specific characteristics of the known model composition and at the same time 10 significantly improve its molding properties, as well as strength and adhesive characteristics.

Table 1

Modulus of elasticity, CGS / CM

four

Poisson's ratio

Logarithmic damping decrement

Table 2

126-1890 103-1764

0.17-0.23 0.16-0.23

0.21-0.27 0.22-0.30

Claims (1)

1. USSR author's certificate in application number 2179969 / 23-05, cl. C 08 L 63/00, 10.10.75.