news

1、 The essential difference between core definition and molecular structure (the root cause of all performance differences)

All three lotion belong to waterborne acrylic copolymerization lotion, which is the core film-forming resin of latex paint, stone like paint, sand in water, and finishing waterproof system. The difference in performance, weather resistance, defects, and service life among the three is completely determined by the type of comonomer and the molecular main chain structure.

1. Styrene acrylic lotion (styrene acrylic acid copolymer lotion)

Molecular composition: copolymerized with styrene and acrylic ester soft and hard monomers.

Structural characteristics: The molecular chain contains a large number of benzene ring conjugated structures. The benzene ring has strong rigidity and can improve the hardness, filling ability, and alkali resistance of the paint film. However, the benzene ring is extremely unstable to ultraviolet radiation and is the core cause of yellowing and powdering.

Structural summary: Acrylic main chain+styrene modification (sacrificing weather resistance to change hardness and low cost).

2. Pure acrylic lotion (all acrylic copolymerization lotion)

Molecular composition: No styrene, completely synthesized by copolymerization of pure acrylic monomers such as methyl methacrylate and butyl acrylate.

Structural characteristics: The main chain of the molecule is composed entirely of saturated acrylic acid structure, without benzene ring impurities. The molecular bonds are stable and saturated, with strong UV resistance and high oxidation inertness. It is the basic standard structure for outdoor weather resistance.

Structural summary: Pure acrylic system, free of impurities, weather resistant, balanced and stable.

3. Silicone acrylic lotion (silicone modified acrylic lotion)

Molecular composition: Based on the main chain of pure propylene/styrene acrylic acid, with the addition of organosiloxane active groups, it belongs to a high-end modified copolymerization system.

Structural features: Introducing Si-O silicon oxygen bonds with extremely high bond energy (bond energy much higher than carbon bonds), while retaining the adhesion and film-forming properties of acrylic acid, combined with the hydrophobic, temperature resistant, UV resistant, and anti pollution properties of organosilicon.

Structural summary: Acrylic film-forming system+organic silicon hydrophobic weather resistant modification, comprehensive performance ceiling.

2、 Key performance comparison of three major lotion item by item (formula core parameters)

1. Weather resistance, UV resistance, and yellowing resistance (the core outdoor indicators)

Styrene acrylic lotion: poor. The benzene ring structure is prone to oxidation and breakage when exposed to ultraviolet light, and can quickly turn yellow, lose light, powder, and fade after long-term exposure. It is strictly prohibited to use it outdoors for a long time. Only suitable for indoor dark environments.

Pure acrylic lotion: excellent. Without a benzene ring structure, it has excellent UV resistance and antioxidant capacity. It is not prone to yellowing or powdering after long-term outdoor exposure at room temperature, and is a universal standard for conventional exterior wall coatings.

Silicone acrylic lotion: optimal. The silicon oxygen bond has extremely strong resistance to UV, aging, and temperature changes. The paint film’s resistance to powdering, fading, and rain erosion far exceeds that of pure acrylic, and can cope with harsh working conditions such as high temperature, strong sunlight, and high salt spray.

2. Water resistance, resistance to rainwater erosion, and water absorption rate

Styrene acrylic lotion: medium to upper. Styrene brings a dense paint film, with decent initial water resistance, but long-term immersion can lead to slow hydrolysis, whitening, and water permeability.

Pure acrylic lotion: good. Uniform cross-linking, stable water resistance, and long-term immersion in water without easy whitening, meeting the conventional waterproof and water-resistant requirements for exterior walls.

Silicone acrylic lotion: top grade. The surface is enriched with hydrophobic silicon groups, forming a film with lotus leaf hydrophobic effect, extremely low water absorption rate, resistance to rainwater erosion, long-term immersion resistance, and the strongest anti water permeability.

3. Paint film hardness, wear resistance, and scrub resistance

Styrene acrylic lotion: the highest hardness, good wear resistance. Styrene has strong rigidity, dense and hard paint film, excellent scrub resistance, and is the preferred choice for high wear-resistant latex paint for interior walls.

Pure acrylic lotion: moderate hardness, good flexibility. Soft and hard balance, less prone to cracking and powder loss, with the most balanced comprehensive mechanical properties of the paint film.

Silicone acrylic lotion: high hardness+high flexibility. After silicon modification, the paint film is dense and resistant to deformation, with superior scratch resistance, stain resistance, and wear resistance compared to the previous two.

4. Alkali resistance and wall alkali resistance

Phenylpropanoid: It has good alkali resistance and is suitable for cement alkaline substrates, but it is prone to aging in long-term strong alkali environments.

Pure C: Excellent alkali resistance, suitable for various types of mortar and concrete substrates, stable alkali precipitation resistance.

Silicon propylene: The best alkali resistance, silicon oxygen structure is resistant to acid and alkali corrosion, can effectively block the migration of salt and alkali in the wall, and has the best anti alkali and anti whitening effects.

5. Adhesion and substrate compatibility

Phenylpropanoid: It has good adhesion to ordinary cement mortar, but average adhesion to dense substrates and old paint films.

Pure C: Broad spectrum adhesion, suitable for mortar, putty, old walls, and ordinary metal substrates, with the strongest universality.

Silicone acrylic: With strong adhesion and physical anchoring and chemical bonding capabilities, it is suitable for stone, high-density concrete, old base layers, and high-density base surfaces.

6. Cost and cost-effectiveness

Price sorting: Phenylpropanoid<Pure propanoid<Silicon propanoid

Cost effectiveness: Phenylpropanoid is the best indoor option; Pure C is the best for outdoor use; Silicon propylene high-end long-term engineering is the best.

3、 Three lotion industry standard adaptation scenarios (zero error selection scheme)

1. Styrene acrylic lotion: special for pure indoor shading system

Applicable scenarios: Interior wall latex paint, interior putty coating, interior ordinary color paste, interior moisture-proof coating, low-end interior wall decoration system.

Absolute prohibited scenarios: all exposed exterior wall systems, sun exposed areas, roofs, outdoor imitation stone paint, waterproof coverings, and weather resistant coatings.

Core weakness: obvious yellowing, loss of luster, powdering and fading can occur after 3-6 months outdoors, and it cannot withstand weather.

2. Pure acrylic lotion: outdoor general standard main system

Applicable scenarios: ordinary exterior latex paint, exterior real stone paint, water in water, water in sand, exterior mid coat, conventional exterior wall cover, general outdoor anti-corrosion decorative coating.

Positioning: The entry-level qualified standard resin for outdoor coatings, with a balance between cost-effectiveness and weather resistance, is the mainstream choice for the vast majority of civil exterior wall projects on the market.

3. Silicone acrylic lotion: high-end long-term weather resistant waterproof system

Applicable scenarios: high-end exterior wall coating, stone protection, fair faced concrete protection, high weather resistant imitation stone paint, roof waterproofing, high salt spray engineering at the seaside, long-term waterproof and stain resistant coating, renovation cover for old walls.

Positioning: The exterior wall has the highest standard of weather resistance, waterproof, anti pollution and anti-aging, and its service life can reach 2 – 3 times of pure acrylic.

4、 Traceability of high frequency defects in production and construction (exclusive problems of three lotion)

1. Exclusive disadvantages of styrene acrylic lotion

Outdoor exposure to sunlight causes yellowing, fading, and rapid powdering; Poor high-temperature weather resistance; Long term exposure to rain can easily cause the paint film to turn white and lose its luster; Suitable only for indoor static environments.

2. Exclusive disadvantages of pure acrylic lotion

Generally hydrophobic and anti fouling, with obvious accumulation of dust and hanging dirt outdoors for a long time; Long term scouring by extreme rainstorm will cause slight water permeability, and it is impossible to achieve ultra-low water absorption and waterproof.

3. Exclusive disadvantages of silicone acrylic lotion

High cost; Excessive silicon content can easily lead to brittle paint film and slight shrinkage porosity; The compatibility with some high surface active dispersion systems is slightly poor, and the order of adding additives needs to be controlled.

5、 Three Kinds of lotion Simple Selection Formula (common for workshop/purchase)

Indoor high cost-effectiveness, requiring hardness: choose phenylpropanoid

Outdoor conventional engineering requires balanced weather resistance: choose pure acrylic

High end long-lasting waterproof, anti pollution and anti-aging: choose silicone acrylic

6、 Summary and Comparison Table of Core Parameters

Contrast dimensional styrene acrylic lotion pure acrylic lotion silicone acrylic lotion

Core monomer styrene+acrylic ester (benzene free) acrylic acid+organosilicon modification

UV resistant and yellowing resistant (prone to yellowing and powdering), good (outdoor stability), excellent (super weather resistant)

Medium to good water and hydrophobic performance, top-notch lotus leaf hydrophobicity

Paint film hardness: high, medium, balanced, high hardness, high toughness

Anti pollution and dust resistance are generally good and extremely strong

Applicable scenarios are limited to indoor, regular exterior walls, high-end, long-lasting outdoor/waterproof applications

Low, medium, and high cost levels