Original Technology and Featured Products

Generic grades answer the question of whether something exists at all; original technology answers the question of what others cannot do. This page introduces the technical principles behind Tiangang's proprietary IP products - every one of them was designed against a specific, industry-recognized problem.

The design core of Tiangang's original additives is not "adding it into the formulation", but "under what conditions will it not be consumed". Every grade below grew out of that question.

The design core of Tiangang's original additives: under what conditions will it not be consumed

1. Tiangang featured product matrixTiangang Product Matrix

The table below is organized by what problem it solves rather than by chemical category. This is the logic Tiangang uses internally in product planning - first the problem, then the product.

2. Tiangang XT-8: a direct answer to the industry's biggest difficulty - acid production by flame retardantsXT-8 · NOR Chemistry

In flame-retardant systems the weathering gap versus conventional HALS reaches a factor of five; sulfur resistance 3,000-7,000 ppm.

If Tiangang could present only one piece of work, it would be XT-8. Because it addresses not "a problem with a certain class of materials", but the most fundamental chemical contradiction in the entire additive industry.

The nature of the problem: basicity captures free radicals vs. acidity forms char

HALS works by using the lone pair of electrons on nitrogen atoms to capture the free radicals produced by photooxidation, completing the light-stabilization cycle and regenerating itself. This requires the nitrogen to remain basic. Flame retardants (whether brominated, phosphorus-based or APP intumescent systems) release acidic products such as HBr and phosphoric acid under heat or light. Acid protonates the nitrogen atom, the lone pair is occupied, and the light-stabilization cycle fails immediately.

This is not a contradiction that formulation technique can circumvent, but a direct chemical opposition between the two functions.Tiangang's XT-8 was designed precisely for this contradiction - it does not try to make both functions the best possible, but first solves the problem of "not being consumed".

What this data set means is that in flame-retardant scenarios, the gap created by choosing which class of light stabilizer is a factor of five, not a marginal improvement of 10%-20%. For products that must satisfy both flame retardancy and outdoor weathering - outdoor energy storage enclosures, battery pack surrounding components, cable sheathing - this gap is the difference between pass and fail.Tiangang positions XT-8 on this line precisely so that customers do not have to gamble between "pass" and "fail".

How XT-8 solves it

XT-8 uses an N-alkoxy hindered amine with an original CAS structure. The core significance of N-alkoxylation lies in two points:

• significantly reduced basicity - the alkoxy group on the nitrogen atom reduces the electron-donating ability of the lone pair, making it less susceptible to protonation in acidic environments. This is precisely the key to counteracting acid production by flame retardants.
• a higher oxidation state - it can work without a secondary regeneration cycle, providing full light-stabilization capability in the initial formulation.

The matched high molecular weight design solves a common shortcoming of NOR systems: the migration and extraction of small-molecule NOR types in long-term outdoor service.XT-8 is a high molecular weight NOR, combining low basicity and low migration - these two things are usually hard to combine; Tiangang has built them into the same molecule.

XT-8 measured data

XT-8 + FR-810A: Tiangang's closed-loop combination

In triple-consumption scenarios such as artificial turf - "filled rubber producing acid + bleach + acid rain" - Tiangang's answer is a closed-loop combination: FR-810A three-in-one flame retardant reduces acid production at the source, XT-8 NOR type improves acid resistance, and hindered benzoate types provide buffering. No single additive can close this loop on its own - this is compatibility logic Tiangang has repeatedly verified at turf customers.

3. Tiangang FR-810A: from "circumventing acidity" to "removing this weakness from the flame retardant itself"FR-810A · Three-in-One Flame Retardant

Suitable for UL94 V-0 flame-retardant PP.

Faced with acid production by flame retardants, the industry's past approach was to circumvent it at the formulation level: switch to low-basicity HALS, add acid absorbents, adjust the addition sequence. These all work, but they are all compensation.

FR-810A's approach is different: based on NOP™ patent technology, it is a polymeric halogen-free flame retardant combining flame retardancy, light stabilization and thermal stabilization in one product. The flame-retardant system itself no longer emits acidic by-products, eliminating consumption of HALS at the source.

This direction is increasingly being recognized in the industry as a selling point of the flame retardant category itself. Existing domestic patent routes adjust the flame-retardant system pH to 6.5-7 through a weak-base buffer system of calcium oxide plus ammonium aluminum sulfate, combined with a specific content of HALS - the inventor explicitly points out that commercial dialkyl phosphinate flame retardants significantly reduce the oxygen barrier performance of polyamide composites, accelerate internal oxidation of the material, shorten service life, and cause corrosion of rubber in contact with the material.

4. Tiangang HS-362 / HS-625 / HS-962: curing migration and extraction at the rootPolymeric HALS · Migration & Extraction

Mn > 2000, 10% weight loss onset > 350℃.

The technical barrier of conventional low molecular weight HALS is very clear:low molecular weight leads to easy migration, volatilization and extraction, and anti-aging capability decays rapidly. Research has raised molecular weight by condensing TEMP with sodium lignosulfonate to produce a high molecular weight product, solving migration and extraction resistance at the same time - the polymerization route was established from there. Tiangang has three proprietary grades on this line.

5. Tiangang masterbatch: the engineering means most easily underestimatedMasterbatch · Dispersion

In masterbatch form the platform is MB0607-1 and MB0607-2 for light-stabiliser function.

If the additive itself is sound but the product still blooms, the problem is most likely in dispersion. When an additive is unevenly distributed in the resin, local high-concentration zones form and break through the compatibility threshold - and blooming occurs.

Masterbatching pre-disperses the additive uniformly in a high-concentration, low molecular weight carrier, which is then added to the production formulation as a concentrated pellet - the most direct and lowest-cost engineering means of improving dispersion uniformity.

TGUVFQ2001PE for thick-wall UV protection, MB6250PP20 and MB6251PP20 on PP, and MB570-20PET on PET composite structures. Pre-dispersion removes the two failure modes that powder dosing cannot fix: local over-concentration above the compatibility limit, and settling that leaves different parts of the same moulding with different service life.

6. Tiangang application-specific packages: customized by service condition, not by chemical categoryApplication-specific Packages

T-68 targets acid rain and pesticide exposure in greenhouse film.

Tiangang's packages are not generic pre-blends, but customized by downstream service condition. Because the same "weathering" requirement is three different things on agricultural film, turf and automotive parts.

The package series is organised by service condition rather than by chemistry.T-66 is the pesticide-specific film package; T-69 targets acid-producing fillers such as the rubber infill used in artificial turf; T-70 covers automotive compounds with low odour at a concentration of 50% ±2.5% and MFI > 10; T-78 addresses odour and colour together against GB/T 32088-2015 and SAE J2527 cycles; T-81 targets automotive -40 °C to +85 °C thermal cycling; HS-6608 serves PP and ABS compounds; AO-427 is the processing aid for dispersion and batch-to-batch colour; HS-791 and HS-788 are the synergistic high-molecular-weight HALS options.

7. Three principles of Tiangang product designProduct Design Principles

Stringing the products above together, Tiangang's original products follow one design logic. These three principles are what is genuinely discussed in Tiangang's product planning meetings.