Explore our flagship range of high-stability chemical colorants engineered for advanced material processing, textile manufacturing, and polymer compounding. Produced to strict global standards.
In the arena of polymer colorants, Solvent Red 135 (commonly known as Transparent Red EG or Plast Red EG) holds a preeminent position as an oil-soluble dyestuff. Chemically classified under the perinone group (CAS No. 71902-17-5), this molecule is engineered specifically to meet the grueling demands of high-temperature polymer processing. As global industries shift toward structural engineering plastics, the demand for dyes that maintain structural and chromatic integrity above 300°C has intensified.
Currently, China stands as the largest manufacturing epicentre for Solvent Red 135, commanding over 60% of the global output. This dominance is not merely a factor of scale but also of advanced chemical synthesis infrastructure. Chinese factories have evolved from basic chemical blending houses into high-technology units utilizing computerized batching, localized upstream raw material sourcing (such as tetrachlorophthalic anhydride and 1,8-diaminonaphthalene), and state-of-the-art environmental remediation units.
Solvent Red 135 exhibits outstanding thermal stability, often exceeding 300°C to 320°C in engineering polymers. This makes it indispensable for injection molding of polycarbonate (PC), polystyrene (PS), polymethyl methacrylate (PMMA), and polyester (PET) fibers.
With a light fastness rating of 7-8 on the blue wool scale, SR 135 resists photochemical degradation. It is highly valued in automotive taillight assemblies, exterior electrical casings, and heavy-duty industrial signage.
Due to its high affinity for rigid polymer matrix structures, the dye limits bleeding or migration. This structural entrapment ensures that color remains locked inside the plastic parts throughout their lifecycle.
The manufacturing paradigms for Solvent Red 135 are undergoing rapid transformation. Driven by stringent international consumer safety standards and carbon neutrality targets, Chinese synthesis laboratories are focusing on low-chlorination profiles and high-purity filtrations.
In regions with massive textile hubs (such as China, India, and Southeast Asia), Solvent Red 135 is widely consumed in spin-dyeing or dope-dyeing processes of Polyester (PET). Traditional bath dyeing produces vast amounts of wastewater; spin-dyeing blends the pigment directly into the polymer melt prior to extrusion. The chemical purity of Solvent Red 135 must be exceptionally high to prevent spinneret clogging and fiber breakage.
In highly regulated markets like Europe and North America, Solvent Red 135 is primarily formulated for the automotive components sector. Its deep, clear, transparent red hue is the standard for vehicular taillights and interior dashboard light guides, demanding zero batch-to-batch variation in spectral transmission coordinates.
As consumer brands demand sleek, vibrant aesthetics, SR 135 is blended with engineering resins (like ABS and PMMA) for premium mobile phone housings, routers, and high-clarity medical vials. Its compatibility with various plastic additives ensures no interference with flame retardants or UV stabilizers.
For international procurement managers, verifying the purity of Solvent Red 135 is critical. Impurities like halogenated byproducts, free primary aromatic amines (PAAs), or trace heavy metals can disrupt polymer crystallization, cause die deposits in extruders, or breach consumer safety regulations (REACH/FDA).
Advanced Chinese factories employ double-crystallization techniques on raw 1,8-diaminonaphthalene to eliminate isomers that compromise the final color shade. By utilizing eco-friendly catalytic systems, the condensation reaction goes to completion, avoiding leftover unreacted intermediates.
Optimizing the milling process yields a narrow PSD. A uniform particle size of Solvent Red 135 ensures rapid, homogeneous dispersion within polymer melts. This reduces energy consumption during plastic compounding and avoids localized structural weaknesses in spun fibers.
As the European Union updates its environmental mandates, factories are adapting their synthesis lines to reduce volatile organic compounds (VOCs) and halogen residues. Developing clean-process Solvent Red 135 ensures long-term viability in toys and food-contact packaging.
Tianjin Sunrise Chem Group specializes in manufacturing high-quality dyestuffs. Our product portfolio includes Direct dyes, Acid dyes, Basic dyes, Sulphur dyes, Solvent dyes, Liquid dyes, and Fluorescent dyes.
Backed by decades of industry and export experience, we have built a reputation for reliability and excellence, serving clients from diverse sectors including denim, textile, leather, paper, and plastic.
We highly focus on product quality and stability. Each shipment is tested before being dispatched to the port. Our ZDHC Level 3 and GOTS certifications guarantee the highest ecological standards for your supply chain.
We pride ourselves on offering customized solutions. Our team of experts works closely with clients to understand their unique requirements, delivering tailored products and services. We actively seek strategic partnerships to expand our global reach and enhance our offering.
Cooperating with textile and paper mills for many years demonstrates that our factory has established strong and reliable business relationships. This long-term collaboration brings numerous benefits, such as consistent orders, shared resources, and mutual support. It also indicates a solid track record of delivering quality products and meeting partners' needs.
Our mission is to drive business growth by providing reliable, customized products. We aim to contribute significantly to our customers' success by consistently delivering first-class products and exceptional customer service. By building lasting partnerships, we strive to be a catalyst for our clients' success.
With years of experience, we have successfully established partnerships in many countries. Our dedication to meeting global demand and exceeding expectations has earned us a reputation as a trusted supplier worldwide. If you are looking for reliable, high-quality dyes, we invite you to choose us as your partner.
We do not only produce and export dyes and pigments; we prioritize long-term cooperation with our customers by providing services that exceed expectations. Here is why choosing us is the right decision for your business.
A primary reason customers choose us is the stable supply we provide. We have developed efficient manufacturing processes to ensure continuous availability. Our factories feature state-of-the-art equipment and a highly skilled workforce, enabling us to fulfill demanding orders. With us, you can plan production schedules with confidence.
Apart from steady supply, quality is another reason we stand out. We take pride in our commitment to producing dyes that consistently meet high standards. Our experienced technicians carefully monitor production, ensuring each batch is tested for color fastness, durability, and other essential parameters. By choosing us, your products will stand out in the market due to their vibrant, long-lasting colors.
Get answers to technical and operational questions regarding processing parameters, formulation properties, and global regulations.
We believe in building relationships with our clients based on trust and mutual benefit. Your success is our success, and we are committed to providing quality services to meet your needs. Our dedicated customer support team is available to address your questions and concerns. We value your feedback and strive to continuously improve our operations.
Our purpose is not just to supply dyes, but to be your partner in achieving your business goals. By choosing us, you choose a partnership built on reliability, transparency, and mutual success. When choosing a dye factory with a stable supply, high quality, and excellent service, we are your partner of choice. Contact us today to discuss your requirements.
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