The composition for fire-resistant thermal barrier coatings

 

The invention relates to compositions for obtaining a flame-retardant heat-shielding coatings based on polymeric binder. The composition contains, wt%: as the plasticizer - postpolio 3-10, pore-forming - acetone 3-5, filler is perlite 5-10, talc-8-12, mica 5-9, phenol-furfural-formaldehyde resin 15-30, epoxy Dianova resin 10-30, curing agent is hexamethylenetetramine in an aliphatic alcohol of 0.5-1.0, copolymer of vinyl chloride with Acrylonitrile 30-40. The technical result is the improvement of physical-mechanical and technological properties of fire-resistant thermal barrier coatings while maintaining the high thermal insulation properties at high temperatures. table 1.

The invention relates to compositions for obtaining a flame-retardant heat-shielding coatings based on polymeric binder and can be used to protect moving objects from high-temperature heating.

Known fire-resistant thermal insulation coating, which includes a polymeric binder phenol-formaldehyde resin, plasticizer, solvent, filler and hardener (see and.with. The USSR 1682369, IPC 5 09 D 5/18, 123/34, 1989).

The disadvantages of the known fire-resistant thermal barrier coatings javlyautsya-mechanical and technological properties of polymeric flame retardant heat-resistant coating, including increasing the adhesion and viability, while maintaining a high heat-shielding properties.

The problem is solved by using the proposed thermal insulation polymer coating as a plasticizer - Pospolita, pore-forming - acetone, filler is perlite, talc, mica, polymer binder is a phenol-furfural-formaldehyde resins and epoxy Dianova resin, curing agent is hexamethylenetetramine in an aliphatic alcohol and a copolymer of vinyl chloride with Acrylonitrile, in the following ratio, wt.%: The phenolic-furfural-formaldehyde resin - 15-30 Epoxy Dianova resin - 10-30 Copolymer of vinyl chloride with Acrylonitrile - 30-40 Hexamethylenetetramine in an aliphatic alcohol - 0,5-1,0 Postpolio - 3-10 Perlite - 5-10 Talc - 8-12 Mica - 5-9 Acetone - 3-5
In the composition for fire-resistant thermal barrier coatings using a copolymer of vinyl chloride with a content of from 40 to 80 wt.% Acrylonitrile, for example, mark an SCN-60 on THE 6-02-863-79, when exposed to heat allocates Hcl in the gas phase, with Acrylonitrile ciclesonide, increasing the strength of the coke. The presence of phosphorus-containing compounds provides self-extinguishing burning hydrocarbon solids.

As thepenalty novolak SF-014, the furfural and the resin grade RSF -250 beyond 6-05-03 1-463-79 representing obespekoeny novolak SF-014, fused with triphenyl, furfural.

The viability of these resins is six months.

We used hexamethyltetraline in the preparation of the compounds dissolved in the ratio, as a rule, (1:1) aliphatic alcohols, for example the catalyst brand FU TU 6-05-031-395-75, which in this proposal, we used ethyl, butyl and furrowy alcohols.

In the composition using the epoxy resin Dianova uncured brands ED-16, ED-20 ED-22 GOST 10587-84.

Postpolio produced TL6-02-863-79.

Postpolio is an ethoxylated ester of pentaerythritol with alkylphosphines and methacrylic acids. Its structural formula is as follows:

The composition is prepared by mixing the starting components, prior to application of the composition is administered in the curing agent is hexamethylenetetramine in an aliphatic alcohol.

After mixing all components get a homogeneous mass with the viability of not less than 24 hours

The coating on the protected surface is crashrep the Roma" with intermediate drying for 15-30 min at room temperature and then aged at a temperature of 85oC for 1-1,5 hours

The final heat treatment of the entire thickness of the coating is carried out at a temperature of 85oWith over 3 hours

To assess thermal insulation properties of the coating samples coated with a heat-shielding coating is subjected to high temperature heat.

The tests declared fire-resistant thermal barrier coatings has led to the conclusion that the physical-mechanical and technological properties is higher than in the known thermal barrier coatings with high thermal insulation properties.

The test results declared fire-resistant thermal barrier coatings in comparison with the known coating shown in the table.

Thus generated heat coating is compared with the known heat-shielding coating higher adhesion 30 kgf/cm2against 5 kgf/cm2, viability (time-usability since preparation) - 24 h versus 2 h from the known coatings, high heat-shielding properties is heating up to 175oWith against 200oWith the known coatings, high tear resistance -200 kgf/cm2against 180 kgf/cm2the known heat-resistant coating.


Formula of the picture is a torus, the filler and hardener, characterized in that it comprises a polymeric binder phenol - furfural - formaldehyde resin and epoxy Dianova resin as a curing agent is hexamethylenetetramine in an aliphatic alcohol as a plasticizer - postpolio, as filler is perlite, talc, and optionally acetone and a copolymer of vinyl chloride with Acrylonitrile, in the following ratio, wt. %:
The phenolic-furfural-formaldehyde resin - 15-30
Epoxy Dianova resin - 10-30
Copolymer of vinyl chloride with Acrylonitrile - 30-40
Hexamethylenetetramine in an aliphatic alcohol - 0,5-1,0
Postpolio - 3-10
Perlite - 5-10
Talc - 8-12
Mica - 5-9
Acetone - 3-5

 

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