SEARESIN 142: Premium Soft Water-Soluble Acrylic Resin for Genuine Leather Finishing
Anionic Universal Acrylic Co-Polymer Emulsion Binder (30.0% Active, pH 7.0) — Clear Soft Full Film with Low Tackiness & High Stretchiness, Even Appearance, Good Light & Heat Resistance, High Wet & Dry Flexing, Main Binder for Natural Soft Finishes by Guangdong Seaton Advanced Materials Co., Ltd.
Introduction
Soft leather is the hardest leather to finish well. Soft articles demand finishes that stay soft and full in the hand, stretch with the leather without cracking, resist blocking and sticking when stacked or folded, survive wet and dry flexing, and hold their brightness through light and heat. Most acrylic binders compromise somewhere in that list. SEARESIN 142 is Guangdong Seaton Advanced Materials Co., Ltd.'s premium soft water-soluble acrylic resin for genuine leather finishing—an anionic, universal acrylic co-polymer emulsion binder at a notably high 30.0% active substance and a near-neutral pH of 7.0, supplied as an opaque, milky white liquid. SEARESIN 142 forms a clear, soft and full film with low tackiness and high stretchiness, gives an even, well-spread appearance, offers good light and heat resistance, and delivers high wet and dry flexing. Designed as the main binder for all kinds of soft articles requiring natural, soft finishes, it is the dependable workhorse resin of a soft-leather finishing system.
Core Benefits
Clear, Soft & Full Film with Low Tackiness and High Stretchiness
The defining characteristic of SEARESIN 142 is its clear, soft and full film with low tackiness and high stretchiness. Three properties are compressed into that sentence, and all three matter equally. "Clear" means the film stays transparent and does not cloud the grain or mask the dye—the leather keeps its natural look. "Soft and full" means the finished leather feels supple and substantial in the hand, with body rather than a thin, papery, empty touch; this fullness (手感丰满) is what distinguishes a premium soft finish from a cheap, flat one. "Low tackiness" is the practical property that saves production: films that remain tacky stick to themselves and to other hides when stacked, folded, or rolled, producing blocking marks, surface damage, and rework. SEARESIN 142's low-tack film releases cleanly, so leather can be stacked and handled without sticking. And "high stretchiness" means the film elongates with the leather instead of fighting it, so soft, elastic leathers can flex and stretch without the finish cracking. Together these properties give soft articles the rare combination of natural appearance, full hand, clean handling, and durable elasticity.
Even Appearance — Uniform, Well-Spread Film
SEARESIN 142 provides an even appearance, forming a uniform, well-spread film across the hide. A binder that spreads unevenly leaves visible patches, mottling, and shade variation that no amount of top-coat work can fully hide; it also wastes material and forces rework. SEARESIN 142's emulsion spreads and levels consistently, delivering a uniform film with even coverage and consistent appearance from side to side and edge to centre. This evenness is especially important on soft leathers, where the surface absorbs unevenly and where any variation in film thickness immediately shows as a shade or gloss difference. The result is a clean, consistent, professional-looking finish with high first-pass quality and less colour correction.
Good Light & Heat Resistance — Brightness That Holds
SEARESIN 142 offers good light and heat resistance. Acrylic finishes are exposed to light, heat, and aging throughout the life of the leather—during drying and stacking in the plant, during transport, and during years of service. Poor light and heat resistance shows up as yellowing, discoloration, gloss loss, and embrittlement, which is fatal for white and light-coloured leathers and damaging even for dark shades. SEARESIN 142 is formulated for stability under light and heat, retaining its clarity and brightness rather than yellowing or degrading. This makes it suitable for pale, bright, and white soft leathers where any yellowing would be unacceptable, and it protects the appearance of all shades over time. Combined with the clear, non-clouding film, this resistance ensures the finished leather looks as good in service as it did on the finishing line.
High Wet & Dry Flexing — Durability Under Real Service
SEARESIN 142 delivers high wet and dry flexing. Flexing resistance is the definitive durability test for soft leather finishes: the film is repeatedly bent, both dry and wet, and observed for cracking, crazing, whitening, and delamination. Soft leather in real service—garments that crease at the elbow, shoes that bend at the vamp, upholstery that flexes under weight, bags that fold—is subjected to precisely this kind of repeated flexing, and moisture from rain, sweat, or cleaning makes it worse. SEARESIN 142's soft, highly stretchy film withstands both wet and dry flexing, resisting cracking and whitening and maintaining adhesion through repeated stress. This high flexing performance, together with the low tackiness and light/heat resistance described above, gives soft-article leather a finish that holds up in the field rather than only on the shelf.
Technical Specifications
• Product Type: Universal acrylic co-polymer emulsion binder (soft water-soluble acrylic resin)
• Appearance: Opaque, milky white liquid
• Relative Softness: Soft grade (软)
• Active Substance: 30.0% (high solids)
• pH Value: 7.0 (near neutral)
• Charge: Anionic
• Key Feature: Clear soft full film, low tackiness, high stretchiness, even appearance, good light & heat resistance, high wet & dry flexing
• Application: Main binder in soft articles requiring natural & soft finishes; 10-30% based on binder weight
• Storage: 1 year in cool, dry conditions (original sealed packaging)
Application Guidelines
SEARESIN 142 is designed to be applied as the main binder in all kinds of soft articles requiring natural and soft finishes. In a typical finishing system it serves as the principal film-forming resin, building the soft, full, elastic layer that carries colour and provides the base for subsequent coats. Because it is a universal co-polymer emulsion with a near-neutral pH of 7.0 and anionic charge, it is broadly compatible with conventional anionic pigments, dyes, and auxiliaries used in soft-leather finishing.
Recommended Addition (% based on binder weight)
• Suggested addition: 10 - 30% (based on total binder/resin weight)
• Actual dosage depends on the desired effect, leather type and finish system
Typical Application Areas
• Main film-forming binder for soft garment leather (natural, soft finishes)
• Main binder for soft nappa and shoe upper leather finishes
• Upholstery and soft-article finishes requiring full hand and low tackiness
• Light-coloured and white soft leathers requiring light/heat stability
SEARESIN 142 is designed for tanneries and finishing plants producing soft articles with natural, soft finishes. Its high 30.0% solids content delivers more film per kilogram, and its low tackiness keeps stacked leather clean. Because soft-article systems vary widely in substrate, colour, and top-coat, actual addition should be optimized within the specific recipe. SEATON technical support is available to help tailor SEARESIN 142 usage, co-binder balance, and coat build-up for your soft-leather finishing requirements.
Economic & Quality Value
SEARESIN 142 delivers clear economic and quality value across soft-leather production. At 30.0% active substance—the highest solids level in this product family—each kilogram delivers more binding and film-building capacity, reducing consumption per unit of finished leather and lowering both material and freight cost per hide. Low tackiness eliminates blocking and sticking damage during stacking, folding, and storage, removing a common and expensive source of rework and seconds. Even, well-spread film formation improves first-pass quality and reduces shade correction. Good light and heat resistance protects pale and white leathers from yellowing rejects and preserves appearance in service. High wet and dry flexing reduces field failures, cracking complaints, and warranty claims. Combined, these properties make SEARESIN 142 an efficient, reliable main binder that lowers total finishing cost while raising the quality and durability of the finished soft leather.
About SEATON & Conclusion
Guangdong Seaton Advanced Materials Co., Ltd. (SEATON) is a trusted supplier of high-performance leather chemicals and processing solutions. With dedicated expertise in acrylic co-polymer technology, emulsion binder formulation, soft-finish chemistry, and light/heat-stable resin development, SEATON combines continuous research with practical manufacturing knowledge to deliver products that meet the needs of leather producers worldwide. SEARESIN 142 represents SEATON's commitment to advancing soft, durable, natural finishing systems for genuine leather.
SEARESIN 142 represents a premium standard in soft water-soluble acrylic resin for genuine leather finishing—the perfect combination of a universal anionic co-polymer emulsion, 30.0% high solids, clear soft full film, low tackiness, high stretchiness, even appearance, light and heat resistance, and high wet and dry flexing. Whether you are finishing soft garment, nappa, upholstery, or other soft articles requiring natural, soft finishes, this soft water-soluble acrylic resin for genuine leather finishing delivers the full, supple, durable film your leather deserves.
Build clear, soft, full films that keep soft leather supple and substantial in the hand, finish with low tackiness so stacked hides release cleanly without blocking, stretch with the leather instead of cracking it, hold brightness through light and heat for pale and white shades, and pass both wet and dry flexing tests in real service—experience the difference that SEATON leather chemicals and soft water-soluble acrylic resin technology can make in your genuine leather finishing. Choose SEARESIN 142 today—the intelligent main binder for natural, soft, durable leather finishes.
Contact your SEATON representative today for soft acrylic resin trials and soft-leather finish formulation support.