SU827511A1 - Cold-hardened polymeric mastic - Google Patents

Description

Fibrous filler can serve chopped into 5–50 mm pieces of glass, asbestos, coal, and basalt fibers. Up to 5% of addictive substances such as thixotropic additives such as magnesium oxide, calcium oxide, calcium oxide hydrate and others may be added to these compositions; additives of special purpose, for example, to increase fire resistance, tropic resistance, antimicrobial substances and others; pigments; dyes, for example, titanium dioxide, sag, aluminum powder. Example 1. Composition, May. % Epoxy resin Dianova ED-20 (GOST 1087-72) 42 PEPA (polyethylene polyamine TU 6-02-594-70) 10 TE-750 (oligoether with hydroxyl groups, replaced by fe / A - scattered by 72% epoxy) 25 Fiberglass, chopped into segments up to 30 mm20 Sand (GOST 10832-74) 3 P and m er 2. Resin ED-2028 PEPA3 DA-500 (oligo ether with hydroxyl groups replaced by 68% amine) 5 Fiberglass, chopped into 10 mm lengths 20 Sand (GOST 8736-67) 44 Example 3. Resin ED-16 (GOST 10587-72) 40 PEPA4 TA-750 (oligoether with hydroxyl groups, replaced by 80% amine) 10 Fiberglass, chopped cut in lengths up to 20 mm 26 Sand 20 The curing time of the compositions according to Examples 1-3 is 18 hours cree 18-25 ° C. Example 4. Resin unsaturated polyether maleate PN-1 (MRTU 6-05-1082-76) 28 PEPA3,5 PMEC (methyl ethyl ketone peroxide) 0.5 NK (cobalt naphthenate) 0.3 TE-500 (oligo ether with hydroxyl groups replaced by 68% with epoxy) 25 Basalt fiber, chopped into segments up to 50 mm22 Kaolin, grade 11 grade 1 (GOST 6138-61) 20.7 Example 5. Resin unsaturated polyester OPS 609-21M (MRTU 6-05-1306-74) 42 PEPA8 PMEC1.5 NK0.5 TE-750 (oligo ether with hydroxyl groups substituted 80% epoxy) 25 Fiberglass chopped into segments up to 50 mm17 Mel 6 Example 6. Polyester unsaturated resin PN-3 (MRTU 6-05-1082-76) 28 PMEK1.5 NK1.5 TA-750 (oligo ether with hydroxyl groups , replaced by 75% amine) 3 Fiberglass, chopped into segments up to 5 mm15 Sand (GOST 10832-74) 49 The curing time of the compositions according to examples 4-6 is no more than 24 hours at 18-25 ° C. The physicomechanical properties of the cured polymeric mastic are presented in the table.

Flammability 4 categories according to GOST 21207-75 Note.

Category 3 Option 1-polymer resin containing epoxy resin; option 2-polymer mastic comprising a polyester resin.

As can be seen from the table, the introduction into the composition of a simple oligoether based on propylene oxide and glycol containing amino or epoxy groups, and its application at the indicated ratio of components leads to an increase in the strength properties, water resistance and fire resistance of the cured mastic layer.

Cold cured polymeric mastic compositions are made by one of the above methods.

Method 1. A calculated amount of resin, a polymerization accelerator, auxiliary additives and a fine filler are successively loaded into the mixer with stirring.

The calculated amount of the substituted oligoester, the polymerization initiator and (or) the hardener are poured into another container, the calculated amount of fibrous filler is filled in and mixed for 5-10 minutes.

The contents of both containers are combined and further mixed until a homogeneous mass is obtained.

Mastic is ready for use.

The term of its use is 1-2 hours at 15-25 ° C.

Method 2. To the mixer with a mechanical mixer add sequentially the calculated amount of resin, accelerator, mineral dispersed and fibrous filler, auxiliary substances, mix thoroughly until a homogeneous mass is obtained.

The mixture in a closed container can be stored for up to 3 months. Before applying the mastic, add the substituted oligoester and the polymerization initiator and / or hardener to the desired amount of the mixture and mix thoroughly.

The term of use of mastic with the initiator (hardener) is 1-2 hours at 15-25 ° C.

Cure time at 18-25 ° C 18-24 h.

Polymer mastic does not contain any scarce ingredients, its main components are mass-produced by industry. The proposed composition is more technological in preparation. It can be obtained centrally, in mass production plants for the production of glass-reinforced plastics, and used with the introduction of hardeners and modifying additives immediately before repair, or prepared in repair factories from the specified ingredients on conventional equipment such as a concrete mixer or mixers for preparing a sealant.

The use of the proposed mastic will significantly reduce the cycle of obtaining the coating ready for operation (from 96-120 h at a temperature of 18-24 ° C).

Claims (3)

1. Cold-cured polymeric mastic for coating, including a polymeric binder, a hardener and a mineral filler, characterized in that, in order to simplify the technology, increase water resistance, fire resistance, compressive strength and separation from the metal surface, it contains as a polymer binder epoxy resin or an unsaturated polyester resin and additionally a simple propylene oxide-based oligoester and glycol containing amino or epoxy groups in the following ratio of components, May . %: Polymer Binding28-42 Hardener 3-10 Simple oligoether5-25 Mineral filler Else 2. A polymer resin according to claim 1, comprising an epoxy resin, characterized in that it contains polyethylene polyamine as a hardener. 3. Polymer mastic according to claim 1, comprising an unsaturated polyester resin, characterized in that as a hardener, it contains a mixture of peroxide initiator and cobalt naphthenate or a mixture of peroxide initiator, cobalt naphthenate and polyethylene polyamine. Sources of information taken into account in the examination 1. Cover deck mastic, OST 5.9653-77. 2. Reznichenko P. T. Mastics in construction. Dnipropetrovsk, ed. “Promin, 1975, p. 219-222 (prototype).