CHLUMIAO®TDP / Triisodecyl phosphite / Antioxidant TDP CAS 25448-25-3

Tetraphenyl dipropyleneglycol diphosphite

CAS No. : 25448-25-3

Molecular weight: 502

Other Name: Tetraphenyl dipropyleneglycol diphosphite; Rostabil TDP; Triisodecyl phosphite

Antioxidant TDP Application scenarios

1. PVC (Rigid/Flexible)

As an auxiliary stabilizer and chelating agent, it improves the color, transparency, and thermal stability of finished products.

2. Polyurethane (PU)

Provides thermal stability in polyurethane coatings; in polyurethane foam, it reduces the risk of core burning and has anti-yellowing properties against phenolic yellowing and nitrogen oxide (NOx) fumes.

3. Polyolefins (e.g., PP)

As a stabilizer, it provides good color and thermal stability during processing and later applications.

4. Engineering Plastics (ABS, PET, etc.)

Used in materials such as ABS and PET to improve thermal and color stability during processing.

5. Rubber (SBR, CR, etc.)

Used as an antioxidant in rubber, extending material lifespan and improving heat resistance.

6. Lubricants/Additives

Used as a lubricant additive or component of metalworking fluids, it improves anti-friction and anti-wear properties, and acts as a sulfur deactivator.

💡 Technical Highlights and Selection Guidelines

In addition to the applications mentioned above, the following points will help you gain a more comprehensive understanding and use of this product:

Core Function: TDP belongs to the phosphite antioxidant class. Its main function is to decompose hydroperoxides generated during high-temperature polymer processing, preventing further degradation and thus protecting the material. This function is usually achieved synergistically with primary antioxidants (such as phenols).

Key Advantages: Product information shows that TDP is a phenol-free, environmentally friendly additive. In fields that promote environmentally friendly formulations (such as compliant production of toys and food contact packaging), it can be used as an alternative to phenolic antioxidants.

Description

CHLUMIAO®TDP Usage

Antioxidant TDP is a high-performance, environmentally friendly trialkyl phosphite antioxidant within the phenolic class, widely utilised across diverse polymer systems. During processing and subsequent use, it not only markedly enhances material thermal stability but also effectively improves product colouration, imparting a brighter, more uniform appearance.

In both rigid and flexible PVC materials, TDP functions as an efficient auxiliary stabiliser and chelating agent. While ensuring processing stability, it further enhances product transparency and colour quality. When applied to polyurethane foam systems, this product delivers outstanding antioxidant protection, helping to reduce combustion risks in foam core materials. It also exhibits excellent resistance to phenolic and thiophene yellowing, ensuring long-term preservation of the material’s original appearance.

Suitable for diverse systems including polyurethane coatings, polyolefins, ABS, PVC, PET and lubricants, this product is a multifunctional stabiliser with outstanding comprehensive performance.

Recommended dosage: 0.1% – 2.0%, adjustable according to specific application systems and performance requirements.

Quality index

Product appearance: Colorless and transparent liquid
Chromaticity (Pt-Co) : ≤50
Density (25℃) : 0.880-0.910
Refractive index (25℃) : 1.4580-1.4630
Phenol content wt% : N.D.

Packaging specification

170KG iron drum

Application

PVC, ABS, PET, SBR, CR, PU, organic synthesis

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