RU2458086C1 - Polymer composition - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: composition contains the following (pts.wt): epoxy resin ED-20 - 20-30; epoxy resin DEG-1 21-28; polyether - 12-20; filler - 17-25; hardener - stabilised liquid mixture of aliphatic and aromatic amines - 15-20; curing accelerator - either resorcin or hydroquinone or pyrocatechol 3-5, plasticiser - either a polyether based on diethylene glycol, butyl alcohol and maleic anhydride, or a polyether based on adipic acid, diethylene glycol and butyl alcohol.

EFFECT: invention enables to obtain polymer compositions with low viscosity, longer life, high rate of cure and high strength and adhesion to different types of highly filled polymer compositions.

3 tbl, 8 ex

Description

The invention relates to the field of development of polymer compositions for use as an adhesive-active coatings of highly filled polymer compositions (energy condensed systems), as well as as casting compounds in electronics, electrical and radio engineering, construction and other purposes.

A known polymer composition used as an adhesive coating of one of the types of highly filled polymer compositions (energy condensed systems) described in patent RU 2915741 C1 of 01/27/2008. The disadvantages of this composition are the increased viscosity, low viability of the composition with a short polymerization time, low strength indicators, which negatively affects the manufacturing technology of large-scale products by pouring into the gap between the metal mold and the product.

The closest analogue of the claimed invention is a polymer composition based on epoxyurethane resins obtained by the interaction of epoxy resins with technical aromatic isocyanate, described in patent RU 2295550 C2 from 03.20.2007.

The specified polymer composition has a low viscosity, high survivability, high strength characteristics, but a large cure time, which increases the duration of the charge production cycle.

The purpose of the present invention is to obtain a polymer composition for use as adhesive coatings of all types of highly filled polymer compositions (energy condensed systems), which has a reduced viscosity, increased viability and high polymerization rate, providing high physical, mechanical and adhesive characteristics.

This goal is achieved in that the polymer composition based on epoxy resins, a plasticizer, a filler, a hardener and a curing accelerator contains either a product of the interaction of maleic anhydride (A), butyl alcohol (B) and diethylene glycol (C) in the ratio A: B as a plasticizer: B from 10:80:90 to 40:20:40, or the product of the interaction of adipic acid (A), butyl alcohol (B) and diethylene glycol (C) in the ratio A: B: C from 5: 90: 5 to 30:30 : 40, and as an accelerator - either resorcinol, or hydroquinone, or pyrocatechol, while e epoxy component of epoxy resin mixture is used - the condensation product of epichlorohydrin and 4,4 ^{'-difenilolppopana} of MW from 340 to 420 (epoxy resin ED-20) and the condensation product of epichlorohydrin with diethylene glycol of MW from 220 to 260 (epoxy resin DEG-1) , as a hardener - a stabilized liquid mixture of aliphatic and aromatic amines, and as a mineral filler - kaolin, with the following content of components, parts by weight: epoxy resin ED-20 - 20-30; epoxy resin DEG-1 - 21-28; polyester - 12-20; filler kaolin - 17-25; hardener - 15-20; curing accelerator - 3-5.

The above is confirmed by examples.

Example 1

Getting a double mixture.

An aliphatic epoxy resin based on epichlorohydrin and diethylene glycol with MM 240 (grade DEG-1) (A) and resorcinol (B) in a ratio of 20: 3 is loaded into a reactor equipped with heating and a stirrer, the temperature is raised to 60 ° C and with the stirrer operating mix for 20 minutes.

The double mixture is poured into a metal container and cooled to 20 ° C. The parameters for obtaining a double mixture according to examples 2 ÷ 8 are shown in table 1.

Getting the composition.

In another reactor equipped with a stirrer and a vacuum system, load 23 wt.h. double mixture, after which 24 wt.h. epoxy resin based on 4,4 'dioxidiphenylolpropane with MM 400 (brand ED-20), 10 parts by weight polyester, or the condensation product of maleic anhydride (A), butyl alcohol (B) and diethylene glycol (C) in a ratio of A: B: B 10:80:10, or the product of the interaction of adipic acid (A), butyl alcohol (B) and diethylene glycol (C) in the ratio A: B: B 30:30:40, 10 parts by weight kaolin. The resulting epoxy component of the composition is stirred at a temperature of 20 ° C for 20 minutes while evacuating it, then 20 wt.h. hardener, based on a stabilized liquid mixture of aromatic and aliphatic amines, is stirred for 10 minutes with simultaneous evacuation at a temperature not exceeding 35 ° C. The composition is poured into a mold and cured at a temperature of 60 ° C for 3 hours. The parameters for producing polymer compositions according to examples 2 ÷ 8 are shown in table 2.

The properties of the polymer composition according to examples 1 ÷ 8 in comparison with the prototype in table 3.

As can be seen from the table, the claimed composition has significant advantages compared with known technical solutions.

The properties of the polymer compositions according to claim 1, claim 2 in examples 1 ÷ 8 in comparison with the prototype are shown in table 3.

Table 3 The properties of the claimed composition according to examples 1 ÷ 8 The name of indicators The claimed composition Prototype The value of the indicators one 2 3 four 5 6 7 8 one 2 3 four 5 6 7 8 9 10 1. Technological properties: - viscosity, Pa · s 1,0 1,2 1.4 1,6 1.7 1.8 1.9 2.0 3.0 ÷ 4.0 - pot life, min, at a processing temperature of 25 ° C 40 41 42 44 45 46 48 fifty 60 ÷ 85 - technological curing time, h, at curing temperature 60 ° C 2.0 2.2 2,3 2,4 2.5 2.6 2,8 3.0 5 ÷ 6 at a curing temperature of 20 ° C fifteen eighteen 19 twenty 21 22 23 24 72 2. Physical and mechanical properties: - tensile strength, MPa, at 60 ° C 1,5 1,6 1.7 1.8 2.0 2.2 2,3 2.5 1,5 ÷ 2,5 at 20 ° C 48.0 45.0 44.0 40,0 38,0 35.0 34.8 34.2 34.0 ÷ 48.0 at -50 ° C 58.0 55.0 54.0 52.0 50,0 49.5 49.0 44.0 42.0 ÷ 58.0

Continuation of table 3 one 2 3 four 5 6 7 8 9 10 - tensile strain,%, at 60 ° C thirty 29th 28 27 25 24 22 twenty 19 ÷ 14 at 20 ° C 8.0 7.0 6.5 6.0 5.5 5,0 4.0 3.0 6 ÷ 5 at -50 ° C 1,0 1,1 1,2 1.3 1.4 1,5 1,6 1.7 1.7 ÷ 2.2 - temperature of mechanical glass transition, ° С twenty 21 22 23 24 25 26 27 35 - bond strength with BRTT, MPa, at 60 ° C 1,0 1,1 1,2 1.3 1.4 1,5 1,6 1.7 2.5 at 20 ° C 2.0 2.2 3.2 4.3 4.4 4,5 4.6 4.7 3,5 at -50 ° C 12.0 12.1 12,2 12,4 12.5 12.7 12.8 13.0 55 - bond strength with STRT, MPa, at 60 ° C 0.67 0.66 0.65 0.66 0.665 0.67 0.68 0.69 - at 20 ° C 1.10 1.12 1.14 1.16 1.18 1,185 1.20 1.25 - at -50 ° C 6.9 6.9 6.9 6.9 7.0 7.1 7.1 7.1 -

Claims (1)

A polymer composition based on epoxy resins, a mineral filler, a plasticizer, a hardener, a curing accelerator, characterized in that a mixture of epoxy resins: the condensation product of epichlorohydrin and 4.4 'is used as an epoxy component to reduce viscosity and increase survivability diphenylolpropane with a molecular weight (M.M.) of 340 to 420 (ED-20) and a condensation product of epichlorohydrin and diethylene glycol with M.M. from 220 to 240 (DEG-1), as a plasticizer or a product of the interaction of maleic anhydride (A), butyl alcohol (B) and diethylene glycol (C) in a ratio of A: B: C from 10:80:10 to 40:20: 40, or the product of the interaction of adipic acid (A), butyl alcohol (B) and diethylene glycol (C) in the ratio A: B: C from 5: 90: 5 to 30:30:40, as a mineral filler - kaolin, as hardener - a stabilized liquid mixture of aliphatic and aromatic amines, and as a curing accelerator, either resorcinol, or hydroquinone, or pyrocatechol in the following obsession components in parts by weight .:
epoxy resin ED-20 20-30 epoxy resin DEG-1 21-28 plasticizer 12-20 filler 17-25 hardener 15-20 curing accelerator 3-5