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Rheosolve T 663 is a trade-name solvent or coalescent-type additive used in coatings and industrial formulations to reduce viscosity, improve flow and leveling, and support film formation, and Rheosolve T 663 is valued for helping stabilize processing behavior and improving application properties in compatible systems.
Rheosolve T 663 is used in waterborne and solventborne coatings, inks, and related formulations where controlled solvency and evaporation behavior are required, and Rheosolve T 663 performance depends on its exact chemical composition, purity, dosage, and compatibility with the binder system and other solvents.
Rheosolve T 663 is typically supplied as a clear liquid, and Rheosolve T 663 should be handled with good industrial hygiene practices and adequate ventilation because solvent-type additives can cause irritation and may be flammable depending on composition.
CAS Number: does not have a single, universal CAS number
EC Number: does not have a single, universal EC number
Molecular Formula: Mixture
Molecular Weight: Mixture
Synonyms: Rheosolve T 663, RHEOSOLVE T 663, Rheosolve T Series Solvent, Rheosolve Coalescent (trade dependent), Coalescing Aid Rheosolve, Coating Solvent Additive, Flow and Leveling Solvent, Viscosity Reducer Additive, Solvent Blend (trade dependent), Rheosolve T663 Solvent, Rheosolve Film-Forming Aid, Process Solvent Rheosolve, Rheosolve T 663 Solvent, RHEOSOLVE T 663 Solvent, Rheosolve T 663 Co-Solvent, RHEOSOLVE T 663 Co-Solvent, Rheosolve T 663 Formulation Solvent, RHEOSOLVE T 663 Formulation Solvent, Rheosolve T 663 Industrial Solvent, RHEOSOLVE T 663 Industrial Solvent, Rheosolve T 663 Technical Grade, RHEOSOLVE T 663 Technical Grade, Rheosolve T 663 Industrial Grade, RHEOSOLVE T 663 Industrial Grade, Rheosolve T 663 Specialty Chemical, RHEOSOLVE T 663 Specialty Chemical, Rheosolve T 663 Processing Aid, RHEOSOLVE T 663 Processing Aid, Rheosolve T 663 Resin Solvent, RHEOSOLVE T 663 Resin Solvent, Rheosolve T 663 Coating Solvent, RHEOSOLVE T 663 Coating Solvent, Rheosolve T 663 Paint Solvent, RHEOSOLVE T 663 Paint Solvent, Rheosolve T 663 Ink Solvent, RHEOSOLVE T 663 Ink Solvent, Rheosolve T 663 Adhesive Solvent, RHEOSOLVE T 663 Adhesive Solvent, Rheosolve T 663 Cleaning Solvent, RHEOSOLVE T 663 Cleaning Solvent, Rheosolve T 663 Degreasing Solvent, RHEOSOLVE T 663 Degreasing Solvent, Rheosolve T 663 Surface Treatment Solvent, RHEOSOLVE T 663 Surface Treatment Solvent, Rheosolve T 663 Formulation Additive, RHEOSOLVE T 663 Formulation Additive
APPLICATIONS
Rheosolve T 663 is used in waterborne acrylic coatings to improve film formation, reduce defects, and enhance leveling.
Rheosolve T 663 is incorporated into architectural paints to support coalescence of polymer particles and improved appearance in compatible formulations.
Rheosolve T 663 is used in low-VOC coatings in selected applications where strong solvency and controlled evaporation are required.
Rheosolve T 663 is used in industrial coatings to reduce viscosity and improve application properties such as sprayability and roller leveling.
Rheosolve T 663 is incorporated into high-solids systems to improve flow and reduce sag in compatible designs.
Rheosolve T 663 is used in primers and topcoats in selected formulations to support uniform film build.
Rheosolve T 663 is used in pigment concentrates in selected applications to improve wetting and dispersion during manufacturing.
Rheosolve T 663 is incorporated into grinding and let-down stages to improve color development and reduce viscosity build from poorly dispersed solids.
Rheosolve T 663 is used in ink systems in selected applications to balance solvency and drying behavior.
Rheosolve T 663 is used in adhesives and sealants in selected applications to adjust viscosity and improve working time.
Rheosolve T 663 is incorporated into latex and emulsion adhesive formulations to improve flow and reduce application defects in compatible systems.
Rheosolve T 663 is used in construction chemical formulations where controlled solvency supports consistent processing.
Rheosolve T 663 is valued because Rheosolve T 663 provides controlled solvency and viscosity reduction that improves processing robustness, application behavior, and film quality in many industrial formulations.
Rheosolve T 663 is used as a solvent and viscosity reducer in coatings and inks.
Rheosolve T 663 supports improved flow and leveling by lowering formulation viscosity.
Rheosolve T 663 helps improve pigment wetting and dispersion in some grinding stages.
Rheosolve T 663 is used in solvent-borne industrial coatings to adjust application viscosity.
Rheosolve T 663 supports improved sprayability and atomization in some systems.
Rheosolve T 663 helps reduce orange peel by enabling better flow-out in some coatings.
Rheosolve T 663 is used in high-solids coatings to improve application flow at higher resin content.
Rheosolve T 663 supports reduced viscosity without excessive VOC from highly volatile solvents in some designs.
Rheosolve T 663 helps maintain workable pot viscosity in some high-solids formulations.
Rheosolve T 663 is used in alkyd paints to improve brushability and leveling.
Rheosolve T 663 supports smoother film formation in air-dry alkyd coatings.
Rheosolve T 663 helps reduce brush marks and improve gloss development in some systems.
Rheosolve T 663 is used in epoxy coatings to reduce viscosity and improve substrate wetting.
Rheosolve T 663 supports better penetration into porous surfaces such as concrete.
Rheosolve T 663 helps reduce pinholes by improving wetting and air release in some epoxies.
Rheosolve T 663 is used in polyurethane coatings as a solvent to adjust flow and application properties.
Rheosolve T 663 supports improved leveling and reduced surface texture in PU films.
Rheosolve T 663 helps improve clarity and gloss in some polyurethane clearcoats.
Rheosolve T 663 is used in nitrocellulose lacquers and wood finishes in some systems.
Rheosolve T 663 supports fast wetting of wood and improved flow-out.
Rheosolve T 663 helps reduce lap marks and improves appearance in some wood coatings.
Rheosolve T 663 is used in automotive refinish coatings to tune flash time and spray viscosity in some formulations.
Rheosolve T 663 supports consistent application under varying temperature conditions.
Rheosolve T 663 helps reduce defects linked to poor solvent balance in some refinish systems.
Rheosolve T 663 is used in printing inks to adjust viscosity and improve transfer in some systems.
Rheosolve T 663 supports stable ink flow on press and improved leveling of ink films.
Rheosolve T 663 helps improve print uniformity by reducing viscosity spikes.
Rheosolve T 663 is used in gravure and flexographic inks as a solvent component in some formulations.
Rheosolve T 663 supports controlled drying and solvent balance for press speed.
Rheosolve T 663 helps improve ink wetting on plastic films in some packaging inks.
Rheosolve T 663 is used in pigment concentrates as a solvency aid in some systems.
Rheosolve T 663 supports improved milling efficiency by enhancing pigment wet-out.
Rheosolve T 663 helps reduce time to reach fineness-of-grind targets in some dispersions.
Rheosolve T 663 is used in metal coatings to improve wetting on low-energy or contaminated surfaces in some cases.
Rheosolve T 663 supports improved flow into micro-roughness and better edge coverage.
Rheosolve T 663 helps reduce craters and fisheyes caused by poor wetting in some formulations.
Rheosolve T 663 is used in coil coatings to adjust viscosity and film build in some solvent systems.
Rheosolve T 663 supports stable coating weight control at high line speeds.
Rheosolve T 663 helps improve appearance consistency across long coil runs.
Rheosolve T 663 is used in industrial maintenance coatings where practical application and flow are required.
Rheosolve T 663 supports better brush and roller application performance.
Rheosolve T 663 helps improve appearance consistency on site-applied coatings.
Rheosolve T 663 is used in adhesives as a solvent to adjust viscosity and open time in some formulations.
Rheosolve T 663 supports improved wetting of substrates and adhesive spread.
Rheosolve T 663 helps reduce stringing and improve workability in some adhesive systems.
Rheosolve T 663 is used in sealants as a solvency aid to improve processing in some formulations.
Rheosolve T 663 supports uniform mixing and controlled viscosity in some sealant products.
Rheosolve T 663 helps improve extrusion and tooling behavior in some systems.
Rheosolve T 663 is used in cleaning formulations as a strong solvent for certain soils in some products.
Rheosolve T 663 supports dissolution of resins, inks, and adhesive residues in some applications.
Rheosolve T 663 helps improve cleaning performance on equipment used for coatings and inks.
Rheosolve T 663 is used in paint stripper-type formulations to swell and soften certain coatings in some systems.
Rheosolve T 663 supports removal of aged films when compatible with substrate.
Rheosolve T 663 helps reduce mechanical effort required for stripping in some cases.
Rheosolve T 663 is used in polymer processing as a solvency aid for some resins and intermediates.
Rheosolve T 663 supports preparation of resin solutions for casting and coating.
Rheosolve T 663 helps enable uniform films in some membrane and coating processes.
Rheosolve T 663 is used in laboratory and R&D to screen solvency and compatibility of resins and additives.
Rheosolve T 663 supports formulation development for optimized solvent blends.
Rheosolve T 663 helps identify compatibility windows for stable products.
Rheosolve T 663 is used in manufacturing troubleshooting to address high viscosity, poor flow, and poor pigment wetting.
Rheosolve T 663 supports rapid correction of solvent balance issues in batches.
Rheosolve T 663 helps reduce rejects caused by application defects and inconsistent viscosity.
Rheosolve T 663 is used in quality control to verify solvent purity and water content for consistent coating performance.
Rheosolve T 663 supports stable evaporation behavior and predictable flash time.
Rheosolve T 663 helps reduce batch variability by controlling key solvent properties.
Rheosolve T 663 is used in education and training as an example of solvent selection for flow, leveling, and wetting.
Rheosolve T 663 supports teaching about VOC, evaporation rate, and solvent power balance.
Rheosolve T 663 helps illustrate how solvent choice influences coating defects and appearance.
Rheosolve T 663 is used in export coatings and inks where consistent solvency and viscosity control are required across climates.
Rheosolve T 663 supports stable application performance during long logistics chains.
Rheosolve T 663 helps reduce customer complaints related to viscosity drift and spray defects.
Rheosolve T 663 is used in specialty solvent blends to tailor drying profile and flow-out in some coating systems.
Rheosolve T 663 supports balancing fast and slow solvents for optimal appearance.
Rheosolve T 663 helps improve film formation without runs or sags when optimized.
Rheosolve T 663 is used in high-build coatings to improve flow and reduce trapped air in thicker films.
Rheosolve T 663 supports improved air release and reduced pinholing.
Rheosolve T 663 helps improve surface smoothness and gloss in thick-film applications.
DESCRIPTION
Rheosolve T 663 is a proprietary solvent or solvent-blend additive, and Rheosolve T 663 typically functions by improving solvency for binders and additives and by reducing formulation viscosity.
Rheosolve T 663 can support film formation in waterborne coatings by acting as a temporary plasticizing solvent during drying, and this reduces cracking, mud-cracking, and poor coalescence defects in compatible systems.
Rheosolve T 663 evaporation behavior influences open time and film appearance, and dosage must be optimized to balance drying speed with leveling and defect control.
Rheosolve T 663 compatibility depends on binder chemistry, surfactant system, and other solvents, and performance should be validated with stability testing and application trials.
Rheosolve T 663 should be used according to applicable regulations and good industrial hygiene practices for the target market and facility, especially where VOC limits and worker exposure limits apply.
Rheosolve T 663 should be stored in tightly closed containers away from heat and ignition sources if the product is flammable, and static control is important for bulk solvent handling.
Rheosolve T 663 should be protected from contamination and water ingress if the grade is moisture sensitive.
Rheosolve T 663 should be mixed under controlled conditions to avoid foaming and to maintain consistent viscosity.
Rheosolve T 663 should be handled with appropriate PPE to avoid eye and skin contact during bulk handling.
Rheosolve T 663 is a solvent-type additive used to adjust viscosity, flow, and wetting in coatings, inks, and related formulations.
Rheosolve T 663 is typically supplied as a clear liquid with balanced solvency designed for industrial formulation work.
Rheosolve T 663 helps reduce viscosity and improve flow by acting as part of the solvent package.
Rheosolve T 663 is used in industrial paints, printing inks, adhesives, sealants, and cleaning products where solvency control is needed.
Rheosolve T 663 performance depends on resin polarity, solvent blend, evaporation rate, and compatibility with other additives.
Rheosolve T 663 is commonly optimized to balance leveling with drying time and defect control.
Rheosolve T 663 should be selected based on solubility testing, evaporation profile, and regulatory/VOC requirements for the target market.
Rheosolve T 663 should be stored in tightly closed containers away from ignition sources and excessive heat per standard solvent handling practice.
Rheosolve T 663 is valued for practical viscosity control, strong wetting support, and broad usefulness in solvent-borne formulation systems.
PROPERTIES
Common Name: Rheosolve T 663
Chemical Type: Proprietary solvent or coalescent additive (trade dependent)
Appearance: Clear liquid
Odor: Mild to moderate solvent odor (trade dependent)
Solubility: Trade dependent; typically compatible with the intended resin/solvent system
Viscosity: Low; solvent-like behavior (grade dependent)
Volatility: Moderate; evaporation rate depends on composition
Flash Point: Grade dependent; may be flammable or combustible
Function: Viscosity reduction, solvency, coalescence support, flow and leveling improvement
Stability: Stable under recommended storage; keep tightly closed
Storage Temperature: 5–30°C, tightly closed, well-ventilated area
Shelf Life: Typically 12–24 months in original sealed packaging (supplier dependent)
FIRST AID
Inhalation:
Move to fresh air if vapors are inhaled.
Seek medical attention if symptoms such as headache, dizziness, or breathing discomfort occur.
Avoid breathing vapors during prolonged exposure and ensure good ventilation.
Skin Contact:
Wash with soap and water after contact.
Remove contaminated clothing and wash before reuse.
Seek medical advice if irritation develops or persists.
Eye Contact:
Rinse cautiously with water for several minutes.
Remove contact lenses if present and easy to do, then continue rinsing.
Seek medical attention if irritation persists.
Ingestion:
Rinse mouth with water and do not induce vomiting.
Seek medical attention if discomfort occurs or if a significant amount is swallowed.
Never give anything by mouth to an unconscious person.
Note to Physicians:
Treat symptomatically.
No specific antidote is required.
Provide supportive care as needed.
HANDLING AND STORAGE
Handling:
Use appropriate PPE including chemical-resistant gloves and safety glasses.
Avoid prolonged skin contact and avoid splashing into eyes.
Use explosion-proof equipment and static control if the product is flammable.
Ventilation:
Use general ventilation for normal handling.
Use local exhaust where vapor concentrations may build up.
Avoid handling in confined spaces without adequate airflow.
Storage:
Store in tightly closed containers in a cool, dry, well-ventilated area.
Keep away from heat, sparks, open flames, and static discharge if flammable.
Segregate from strong oxidizers and incompatible chemicals.
Spill and Leak Procedures:
Eliminate ignition sources and ventilate the area if flammable vapors are possible.
Contain spill with inert absorbent and collect into approved containers.
Dispose of waste according to local regulations and facility procedures.
Handling Precautions:
Verify compatibility because solvency strength can affect resin stability and can over-plasticize films if overdosed.
Optimize dosage because Rheosolve T 663 affects drying time, leveling, and VOC profile in coatings.
Follow facility safety rules for solvent handling, including grounding, bonding, and ventilation.
