Notes:

1. The sign "-" means the inadmissibility of the use of fillers or the lack of necessary data.

2. Varnish ML-21 applied according to decalcomania on a surface painted with enamels AS-182, ML-12, ML-152 with suitable primers.

3. Primers VL-02 and VL-023 for steel, apply with subsequent overcoating with an anti-corrosion primer. Under epoxy materials it is allowed to use primers VL-02 and VL-023 without overcoating with anti-corrosion primer,

4. Enamels ML-165, ML-165PM for U1 conditions, it is applied to previously primed surfaces painted with appropriate melamine and pentaphthalic enamels.

For operating conditions U2, U3, UHL4 it is allowed to apply enamels ML-165, ML-165PM on primed surfaces without overcoating with melamine and pentaphthalic enamels.

5. Coatings based on brand enamelsXB and XSbefore operation, they are kept at a temperature of 15-30 ° C for 5 days or at a temperature of -60 ° C for 5-6 hours.

Reviews of site visitors:

Acrylic materials were not often encountered.

First of all, these were acrylic varnishes, which were positioned as varnishes, which, unlike polyurethanes, do not turn yellow over time. Basically, it turned out that way. But there were also disadvantages, acrylic materials were more expensive and dried longer, which is critical when the deadlines for painting and poor heating of the painting area are critical. And if the varnish has not dried properly, then there are problems with its polishing, the varnish begins to roll.

Secondly, I had to work with acrylic paints, when there were problems with metallic paint, which was made on the basis of water-based paint. The paint supplier offered to make a metallic based on acrylic paint and, as time has shown, this was the right choice.

There is a misconception about what is acrylic facades. Acrylic facades are called furniture facades, which are covered with acrylic plastic, plastic and paint are different things. So, do not get confused about what acrylic facades are.

1. Composition comparison
2. Features of alkyd paint
3. Advantages
4. Flaws
5. Advantages
6. Flaws
7. Main differences
8. Is it possible to combine enamels
9. What Not to Do
10. Conclusion

The article compares alkyd and acrylic primers, reveals the main differences in the compositions. It describes the compatibility of paints with each other and which one is more suitable for covering wood.

Composition comparison

The basis of acrylic paint is a polymer emulsion - acrylic mixed with pigments. The solvent is ordinary water, so the material does not have a strong odor. Acrylic is known as water glass and is used as a binder in other building mixes. It also includes improving additives that affect the viscosity, temperature stability of the solution, the finished coating.

Alkyd, or oil, enamel consists of alkyd varnish, coloring pigments, kerosene solvent (white spirit). Additional additives may be included: antiseptics, antifungals, fire-fighting additives. This enamel is often used to coat wood products. When working, thorough ventilation of the premises is required: the composition has a sharp specific smell.

Features of alkyd paint

You can find varnishes and paints.

The varnish is based on alkyd and solvents. It contains no pigments. The solution is used as a primer for other finishing coatings, an antiseptic for wood.

The paint contains pigments. Can perform the function of surface protection. It can be glossy, matte, it does not affect the quality of the coating.

Varnish and primer of the same base have good compatibility. They can be applied on the same surface, mixed.

Advantages

• Wide color range.
• Ease of application, good distribution over the surface.
• Layers dry quickly.
• Cleaning resistance.
• Suitable for interior and exterior work.
• Affordable price.

Flaws

• Strong smell.
• Low UV resistance. The coating fades quickly in the sun.
• Hardness negatively affects the service life. Dried enamel is inelastic, does not withstand linear expansions of the surface. After a few years it cracks and needs updating.

If you need to use alkyd paint on the street, you should choose a composition with additives. The painted product is best placed in the shade.

Acrylic paint: features of use

Acrylic polymer is plastic. The dried coating layer is able to stretch, shrink with minor changes in the size of the base. The paint does not crack after frost. So that the composition lies well on the surface wooden product, necessary:

1. Remove the old coating from the base, sand the surface.
2. Prime the material with special compounds to prevent decay and the reproduction of pests.

The basis for acrylic should be dried, cleaned of dust. The coloring composition is diluted with ordinary water, applied to walls, ceilings, products with a brush, roller. Paint is well distributed on the prepared basis.

Advantages

• Does not change color in the sun, at high temperatures.
• Due to the elasticity, the coating does not peel off, does not crack.
• Long service life - at least 8 years for wood, about 20 for metal and plaster;
• The composition protects the surface from moisture, corrosion.
• No strong odor. Paint does not highlight harmful substances, it is safe to work with it even without protective equipment.

Flaws

• High price.
• The long period of a set of operational durability - about a month.
• Good quality ingredients are hard to find.

Main differences

Material properties are presented in the table.

Dye Compatibility

There is no need to combine ingredients. Alkyd is a good primer for wooden surfaces. Also suitable as a top coat if applied in several layers.

Acrylic paint is elastic, it is best used on products that are subject to linear expansion due to temperature changes, changes in humidity.

Is it possible to combine enamels

To work on the same surface, you need to use tools on the same basis.

Soft formulations can be applied to hard coatings, but not vice versa.

Alkyd enamel is hard, works as a primer under a varnish layer or a softer coat.. Acrylic is a flexible covering material. Can be applied over oily, dry or old foundations. But in this case, the service life of the finishing layer is reduced by 2 times.

The combination is suitable for wood. On surfaces made of other materials, it makes no sense to mix layers.

What Not to Do

Do not apply alkyd enamel on an acrylic surface. If this is still necessary, you need to remove the old coating to the maximum, sand it thoroughly, then prime it.

Do not mix dissimilar components. Acrylic-alkyd enamel can only be produced industrially using special technologies. It is not used in construction.

Conclusion

The article compares two materials. You can't say which one is better. When choosing, you need to take into account the expected service life of the coating, operating conditions, the quality of the finished surface, and the budget for repairs.

Compatibility of finishing paints and varnishes (LKM) with primers (or old paint and varnish coatings) Type LKM Type of primers + AC + + + + + GF + + + + + + + KO + MA + + + + ML + + + + + + + + MS + + + + + MCh + + + + + + + + NC + + + ХВ + + + + + + + + + UR + + + + + PF + + + + + + + EP + + + + + + + + + XC + + + + + + + + Paints and primers: VD - water-borne ; AC - alkyd-acrylic; AU - alkyd-urethane; EP - alkyd-epoxy or epoxy; GF - glyptal; KO - organosilicon; MA - oil; ML - melamine; MS - oil and alkyd styrene; MP - urea; NC - nitrocellulose; AK - polyacrylic; XV - polyvinyl chloride or perchlorovinyl; UR - polyurethane; PF - pentaphthalic; XC - copolymer-vinyl chloride; VL - polyvinyl acetal; AK - polyacrylate; FL - phenolic

Subsequent coating designation

Oil, oil-resin

Alkyd

Bituminous and pitch

Vinyl-pitch and chlorinated rubber-pitch

Vinyl

Polyvinyl-butyral

Chlorine rubber

Epoxy ester

Epoxy

Epoxy-pitch

polyurethane

Silicon-organic

Zincsilicate on liquid glass

Notes:

"+" - you can apply

"-" - can not be applied

"number" - can be applied with the following restrictions:

1. In case the epoxy ester film former is diluted

white spirit;

2. If bitumen and pitch do not penetrate (do not migrate) to the surface

3. When applying anti-fouling enamel, it is advisable to use

intermediate to prevent diffusion of toxins into bituminous

(pitch) underlying layers;

4. After adhesion test due to the variety of incoming solvents;

5. After roughening the coating or tack;

6. After operation for at least 3 months.

When selecting shop primers, consideration should be given to their compatibility with subsequent coating systems. For right choice table should be followed. 2. (recommendations of ISO 12944-5).

Table 3.2

Compatibility of shop (factory) primers with paints and varnishes based on various film-forming agents

Factory primer

Paint compatibility

binder type

Anti-corrosion pigment

Alkyd

Chlorinated rubber

Vinyl

Acrylic

Epoxy1)

Polyurethane

silicate/zinc powder

bituminous

1. Alkyd

mixed

2. Polyvinyl butyral

mixed

3. Epoxy

mixed

4. Epoxy

Zinc powder

5. Silicate

Zinc powder

Notes:

"+" - Compatible

"(+)" - Check for compatibility with the participation of the paint manufacturer

"-" - No compatibility

1) - Including combinations with epoxies, eg based on coal tar lacquer.

Having independently taken up the repair of your apartment, you should have an idea about the materials that you have to use. Doing any - capital or cosmetic - repair, you can not do without paints and varnishes.

If in the store you come across a knowledgeable seller who, moreover, does not mind helping you in choosing a paint, you are in luck. But luck is not always and not for everyone. Therefore, often you have to choose yourself, and there is plenty to choose from.

In terms of their constituent components, paints are not always compatible with each other and with other coatings on which they are to be applied. Therefore, it is better to immediately choose paints that are compatible with each other, so that you do not have to bitterly regret the wasted money and time.

On the label of any paint, you can see its composition, but usually it is an alphanumeric code, which we will understand.

Paints and varnishes based on polycondensation resins

AU - alkydurethane
UR - polyurethane
GF - glyptal
FA - phenol-alkyd
KO - organosilicon
FL - phenolic
ML - melamine
CH - cyclohexanone
MP - urea (carbamide)
EP - epoxy
PL - polyester saturated
PE - unsaturated polyester
ET - etrifthalic
PF - pentaphthalic
ESP - epoxy ester

Paints and varnishes based on polymerization resins

AK - polyacrylate
MS - oil-alkyd styrene
VA - polyvinyl acetate
NP - petroleum polymer
VL - polyvinyl acetal
FP - fluoroplastic
VS - based on vinyl acetate copolymers
XC - based on vinyl chloride copolymers
XV - perchlorovinyl
KCh - rubber

Paints and varnishes based on natural resins

AC - alkyd-acrylic
BT - bituminous
ShL - shellac
KF - rosin
YAN - amber
MA - oil

Paints and varnishes based on cellulose ethers

AB - acetobutyrate cellulose
NC - cellulose nitrate
AC - cellulose acetate
EC - ethyl cellulose

The first digit after the letter code indicates the purpose of the paint or resistance to certain conditions:

1 - weatherproof
2 - resistant indoors
3 - for the preservation of metal products
4 - resistant to hot water
5 - for non-hard surfaces
6 - resistant to oil products
7 - resistant to aggressive environments
8 - heat resistant
9 - electrical insulating
0 - varnish, primer, semi-finished product
00 - putty

Sometimes, to clarify the specific properties of the paintwork, a letter index is put after the number: B - high-viscosity; M - matte; H - with filler; PM - semi-gloss; PG - low flammability.

For putties and primers after zero or zeros indicates on which drying oil it is made:

1 - natural drying oil;
2 - drying oil "Oksol"
3 - glyptal drying oil
4 - pentaphthalic drying oil
5 - combined drying oil

Compatibility of paints and varnishes

Having information about the composition of the paint, it is easy to choose the primer and putty that are suitable for the binder components. But in case this is not at hand, there are compatibility options for dissimilar binding components:

Paint - Compatible Old Coats

AS - AC, VL, MCH, PF, FL, HV, EP
MS - AK, AS, VG, GF, PF, FL
AU - VL, GF, FL, EP
GF - AC, VL, KF, PF, FL, EP
KF - VL, GF, MS, PF, FL
KCh - VL, FL, HV, XS, EP
KO - AK, VG
MA - VL, KF, MS, GF, PF, FL
ML - AK, VL, GF, KF, MS, MCH, PS, FL, EP, EF
MCH - AK, VL, GF, KF, ML, PF, FL, EP, EF
NTs - AK, VL, GF, KF, PF, FL
AK - VL, GF, MCH, FP, EP, EF
HV - AC, VL, GF, CF, ML, MS, PF, FL, HS, EP, EF
UR - AK, VL, GF, PF, FL
PE - VL, GF, KF, ML, MS, PF, FP
PF - AC, VL, GF, KF, FL, EP, EF
HS - AC, VL, GF, CF, PF, FL, HV, EP
EP - AC, VG, VL, GF, PF, FL, HS, EF
EF - VL, KF, ML, FL
ET - VL, GF, MCH, PF, FL, EP

Primer - Compatible putties

AK - GF, MS, NC, PF, HV
AU - GF, PF
VL - GF, KF, MS, PF
GF - KF, MS, NC, PF
KF - GF, MS, NC, PF
ML - GF, MS, PF
MCH - GF, MS, PF
NC - GF, KF, NC, PE
PF - GF, KF, MS, NC, PF, PE, HV
FL - GF, KF, MS, NC, PF, PE, HV
XV - XV
XS - XB
EP - GF, KF, MS, PF
EF - GF, MS, PF

Paint - Compatible putties

AS - GF, KF, MS, NC, PF
AU - GF, KF, PF
GF - GF, KF, MS, PF
MA - GF, KF, MS, PF
ML - GF, MS, PF
MS - GF, KF, MS, PF
MCH - GF, MS, PF
NC - GF, NC, PF
PF - GF, KF, MS, PF
PE - GF, KF, MS, PF
XV - PE, XV
XS - PE, XV
EP - GF, PF, EP
ET - GF, MS, PF

Of course, you can not comply with the compatibility requirements described above, but then get ready for the fact that the repair will have to be redone very soon.

If, in addition to the decorative effect, you need to protect surfaces from the damaging effects of various aggressive environments, then it is better to buy high-quality Belinka paint. This acrylic ceiling paint adheres perfectly to almost any surface - from perfectly prepared to old coatings.