ADDOLINK THPE

Addolink THPE is the trade name for 1,1,1-Tris(4-hydroxyphenyl)ethane, a trifunctional aromatic alcohol that plays a significant role in advanced polymer chemistry due to its unique molecular structure and reactive properties. 
Addolink THPE is a trade name for 1,1,1-Tris(4-hydroxyphenyl)ethane, a trifunctional phenolic compound commonly used in polymer chemistry. 
Addolink THPE serves as a crosslinking agent or chain extender in the production of high-performance polymers, such as epoxy resins, polycarbonates, and polyesters.

CAS Number: 27955-94-8
Molecular Formula: C20H18O3
Molecular Weight: 306.36
EINECS Weight: 405-800-7

Synonyms: 1,1,1-Tris(4-hydroxyphenyl)ethane, 27955-94-8, Phenol, 4,4',4''-ethylidynetris-, Tris(4-hydroxyphenyl)ethane, 4,4',4''-Ethylidynetrisphenol, Phenol, 4,4',4''-ethylidynetri-, DTXSID2037712, 4,4',4''-Ethane-1,1,1-triyltriphenol, TRISP-HAP, 25K43J16E2, 4,4',4''-(ethan-1,1,1-triyl)triphenol, DTXCID0017712, EC 405-800-7, 1,1,1-(TRIS(P-HYDROXYPHENYL))ETHANE, Tris(phydroxyphenyl)ethane, Tris(4hydroxyphenyl)ethane, Tris(parahydroxyphenyl)ethane, 4,4',4''Ethylidynetrisphenol, 1,1,1Tris(phydroxyphenyl)ethane, Phenol, 4,4',4''ethylidynetri, Phenol, 4,4',4''ethylidynetris, 4,4',4''(Ethan1,1,1triyl)triphenol, Phenol, 4,4',4''ethylidynetri (8CI), Phenol, 4,4',4''-ethylidynetri-(8CI), 405-800-7, 608-155-1, 4,4',4''-(ethane-1,1,1-triyl)triphenol, 4-[1,1-bis(4-hydroxyphenyl)ethyl]phenol, 4,4',4"-(Ethylidene)trisphenol, 4,4',4"-Ethane-1,1,1-triyltriphenol, UNII-25K43J16E2, MFCD00012180, SCHEMBL18750, triphenylmethane derivative, 7, CHEMBL491936, BDBM29335, BP_12, 1,1,1-Tris(p-hydroxyphenyl)ethane, 1,1,1tris(4-hydroxy-phenyl)ethane, Tox21_300402, 1,1,1-tri-(4-hydroxyphenyl)ethane, 1,1,1 tris(4-hydroxy-phenyl)ethane, 1,1,1-tris(4'-hydroxyphenyl)ethane, 1,1,1-tris(4-hydroxy phenyl)ethane, 1,1,1-tris(4-hydroxyphenyl) ethane, 1,1,1-tri-(4-hydroxyphenyl)-ethane, AKOS015856425, 1,1,1 -tris(4'-hydroxyphenyl)ethane, 1,1,1 tris(4-hydroxy-phenyl) ethane, 1,1,1-tris-(4-hydroxyphenyl)-ethane, 1,1,1 tris (4-hydroxy-phenyl) ethane, 1,1,1-tris-(4'-hydroxyphenyl)-ethane, NCGC00164142-01, NCGC00164142-02, NCGC00254528-01, AC-24003, AS-15139, 1,1,1-Tris(4-hydroxyphenyl)ethane, 99%, CAS-27955-94-8, CS-0132357, NS00019386, T1254, D78151, Q24849250, 1,1,1-Tris(4-hydroxyphenyl)ethane 100 microg/mL in Acetonitrile, 4,4’,4’’-ethylidynetri-pheno;4,4’,4’’-ethylidynetris-pheno;4,4’,4’’-ethylidynetrisphenol;4-[1,1-bis(4-hydroxyphenyl)ethyl]phenol;3,5-dichloro-N-diethoxyphosphoryl-2-(trichloromethyl)-4-pyridinamine;tris(4-hydroxyphenyl)ethane;4,4',4''-(ETHYLIDENE)TRISPHENOL;1,1,1-TRIS(4-HYDROXYPHENYL)ETHANE

Addolink THPE is commonly incorporated into epoxy resin systems, where it serves to increase the crosslinking density of the cured polymer network, thereby significantly enhancing the resulting material’s mechanical strength, thermal resistance, and dimensional stability. 
Due to its three phenolic hydroxyl groups, Addolink THPE is effective in creating highly crosslinked polymer networks, resulting in materials with superior thermal and mechanical properties.
It contains three phenolic hydroxyl groups symmetrically attached to an ethane core, which makes it highly suitable for use as a branching or crosslinking agent in the synthesis of thermosetting polymers.

These improvements make it especially valuable in applications that demand high performance under mechanical or thermal stress, such as electronic encapsulants, structural adhesives, and aerospace composites.
In addition to epoxy systems, Addolink THPE is also used in the production of high-performance polycarbonates and polyesters, where it contributes to improved rigidity, transparency, and resistance to heat and chemicals. 

Its symmetrical, rigid molecular architecture allows for the creation of polymers with controlled molecular weights and improved branching, which can be tailored to specific performance requirements.
Furthermore, due to its relatively high melting point and low volatility, Addolink THPE is thermally stable and easy to handle in manufacturing environments, making it an attractive additive or co-monomer in industrial-scale polymer production. 
Its chemical properties also allow it to act as a reactive intermediate in the synthesis of specialty chemicals, coatings, and resins with enhanced durability and functional versatility.

Addolink THPE is a versatile and valuable chemical for industries focused on high-performance materials, offering benefits in both formulation flexibility and end-use performance.
Addolink THPE, also known chemically as 1,1,1-Tris(4-hydroxyphenyl)ethane, is a multifunctional phenolic compound that has garnered considerable attention in polymer science and advanced material engineering due to its rigid, symmetrical structure and three reactive hydroxyl groups positioned para to each phenyl ring. 
The trifunctionality of this compound makes it exceptionally suitable for use as a crosslinking agent, chain extender, or branching monomer in a variety of polymer matrices, where it imparts enhanced mechanical integrity, dimensional stability, and resistance to thermal degradation.

Melting point: 246–248 °C (lit.)
Boiling point: 531.8 ± 45.0 °C (Predicted)
Density: 1.252 ± 0.06 g/cm³ (Predicted)
Vapor pressure: 0 Pa at 25 ℃
Storage temp.: Sealed in dry, Room Temperature
Solubility: 241 mg/100g standard fat at 20 ℃
Form: Powder to crystal
pKa: 10.02 ± 0.10 (Predicted)
Color: White to almost white
Water solubility: 25.1 mg/L at 20 ℃
LogP: 3.88 at 20 ℃

When employed in the production of polycarbonates and polyesters, Addolink THPE offers molecular rigidity and a degree of architectural complexity that can be precisely controlled to tailor the final polymer's performance characteristics. 
Addolink THPE is often used to modify linear polymers, introducing branching points that can increase molecular weight while maintaining or improving optical clarity, impact strength, and resistance to heat or UV exposure. 
This makes it a valuable component in materials intended for use in optical lenses, consumer electronics, high-performance packaging, and engineering plastics.

Addolink THPE is valued not only for the performance advantages it provides but also for its processing stability and handling safety, given its high thermal stability and relatively low vapor pressure, which reduce risks of degradation or emission during polymerization or molding processes. 
Its solid, crystalline form at room temperature also allows for convenient storage and dosing in automated manufacturing systems.
In addition to its primary use in polymer synthesis, Addolink THPE has been explored as an intermediate in the development of high-performance coatings, thermoplastic elastomers, and specialty adhesives, particularly where regulatory compliance (such as low VOCs or non-BPA materials) and long-term durability are required. 

Its ability to introduce phenolic moieties into a wide range of chemistries makes it a versatile building block for designing materials with enhanced resistance to oxidation, hydrolysis, and mechanical fatigue.
As industries increasingly demand materials that perform reliably in harsh environments—such as aerospace, automotive, electronics, and renewable energy—additives like Addolink THPE that offer both reactive versatility and performance reliability are becoming indispensable in the formulation of next-generation polymers and composites.

In epoxy resin systems, which are widely used in coatings, adhesives, and composite materials, Addolink THPE contributes to the formation of a densely crosslinked network, resulting in a thermoset polymer that can withstand elevated temperatures, aggressive chemical environments, and prolonged mechanical stress without significant deformation or loss of performance. 
The phenolic hydroxyl groups of THPE participate in curing reactions with epoxide groups, allowing it to integrate seamlessly into the growing polymer matrix, and due to its rigid aromatic core, the resulting network tends to exhibit reduced creep, minimal shrinkage, and high glass transition temperatures.

Uses Of Addolink THPE:
Addolink THPE is primarily used in the formulation of high-performance thermosetting resins, particularly epoxy resins, where it functions as a trifunctional crosslinking agent that significantly enhances the thermal and mechanical properties of the cured network, resulting in materials that maintain structural integrity and dimensional stability even under prolonged exposure to elevated temperatures, mechanical loads, and chemically aggressive environments.
In the composite materials industry, Addolink THPE is utilized to reinforce matrix resins used in the manufacturing of carbon fiber-reinforced polymers (CFRPs) and glass fiber composites, which are extensively applied in aerospace, automotive, and wind energy sectors due to their lightweight yet mechanically robust characteristics; in this context, THPE contributes to higher crosslink density and improved matrix toughness, thereby extending the service life and reliability of the composite components.

Within electronic and electrical applications, Addolink THPE is incorporated into encapsulants, potting compounds, and printed circuit board laminates, where its highly aromatic and thermally stable structure helps produce insulating materials with low dielectric constants, high glass transition temperatures, and excellent resistance to thermal cycling, making it ideal for environments that demand both electrical insulation and heat dissipation.
In the field of coatings and surface treatments, Addolink THPE is used as a co-monomer in the synthesis of phenolic resins and advanced thermoset coatings, where it helps formulate protective layers that exhibit outstanding chemical resistance, hardness, and thermal endurance, making these coatings suitable for use in chemical processing equipment, pipelines, and industrial machinery exposed to corrosive or high-temperature conditions.

Furthermore, in the production of polycarbonates and polyesters, Addolink THPE is employed as a multifunctional branching agent that introduces rigidity and complexity into the polymer backbone, thereby improving key attributes such as optical clarity, heat resistance, and mechanical strength, which are critical for applications ranging from transparent enclosures and safety lenses to heat-resistant components in consumer electronics and automotive interiors.
Addolink THPE is also of growing interest in the development of non-BPA (bisphenol-A) alternatives, where it can serve as a structural analog that provides similar or superior performance in resins and plastics while aligning with regulatory and market demands for safer, environmentally compliant materials, especially in consumer goods and food-contact applications.

In addition to its core roles in structural and performance materials, Addolink THPE is increasingly being employed in the formulation of flame-retardant polymers and coatings, where its aromatic, phenol-based structure contributes not only to the rigidity and thermal stability of the final product but also synergizes effectively with halogen-free flame retardant systems, thereby supporting the creation of environmentally safer, low-smoke, and non-toxic fire-resistant materials used in building insulation, electronic housings, and transportation interiors.
In adhesive systems, particularly those used in demanding industrial settings such as automotive assembly, aerospace fastening, and electronics encapsulation, Addolink THPE is used to formulate high-strength structural adhesives that benefit from its trifunctional nature, allowing for dense crosslink formation that resists mechanical fatigue, thermal cycling, and solvent attack, ensuring long-term bond reliability even under extreme operating conditions.

In the realm of photocurable systems and UV-curable resins, Addolink THPE has potential utility as a multifunctional reactive monomer that can be modified or functionalized to participate in free-radical or cationic photopolymerization processes, making it a candidate for use in optical coatings, 3D printing resins, microelectronics patterning, and biomedical coatings, where dimensional precision and chemical resistance are paramount.
Because of its symmetrical, rigid, and sterically open structure, Addolink THPE can also serve as a useful scaffold molecule in supramolecular chemistry and polymer design, where researchers exploit its predictable geometry and multiple reactive sites to develop star polymers, hyperbranched structures, and network polymers with tunable mechanical, thermal, and rheological properties for use in advanced material platforms such as soft robotics, self-healing materials, and responsive surfaces.

In polyurethane chemistry, Addolink THPE can act as a chain extender or reactive additive in formulations where it reacts with isocyanate groups to form highly crosslinked polyurethane networks that exhibit enhanced hardness, chemical resistance, and thermal durability, which are advantageous in coatings, elastomers, rigid foams, and insulation panels used in both industrial and commercial applications.
Lastly, in research and specialty chemical synthesis, the highly reactive phenolic groups of Addolink THPE make it a valuable intermediate for constructing novel polymer architectures, dendritic molecules, and functionalized resins, thereby expanding its utility beyond conventional bulk manufacturing into custom materials development and advanced functional material design.

Safety Profile Of Addolink THPE:
Although Addolink THPE is not classified as a highly hazardous chemical under major global regulatory systems such as GHS (Globally Harmonized System of Classification and Labelling of Chemicals), it still poses certain health and environmental risks that require appropriate handling procedures and awareness, especially in industrial and laboratory environments where exposure may be frequent or concentrated.
From a toxicological perspective, Addolink THPE may act as an irritant to the eyes, skin, and respiratory tract, particularly in its powdered or dust form, and prolonged or repeated contact without adequate personal protective equipment (PPE) could result in dermal sensitization, mild inflammation, or allergic reactions, especially in individuals who are predisposed to chemical sensitivities or who experience extended occupational exposure.

Inhalation of fine particles or dust during manufacturing, blending, or milling processes may cause respiratory discomfort, including coughing, sneezing, or shortness of breath, and while no acute systemic toxicity has been strongly associated with Addolink THPE, it is still advisable to handle the substance in well-ventilated areas or under fume hoods to minimize airborne exposure and accumulation of dust in workspaces.