Under the umbrella term "profiles" coexist products that bear little resemblance to one another. Rigid profiles—windows, doors, edge banding, moldings—compete for line speed and for maintaining their color and whiteness after years of sun and rain. Flexible profiles—seals, gaskets, bathroom and drainage fixtures, hoses—rely on flexibility and, in many cases, on preventing mold growth due to humidity. Each product family requires its own specific set of additives.
Our portfolio for this industry includes additives for rigid profiles (rigid stabilizers, MBS and CPE impact modifiers, UV absorbers, phosphite antioxidant, waxes and processing aids) and for flexible profiles (plasticizers, flexible stabilizers, epoxidizing and lubricants), in partial batches.
We work with profile extruders that require batch-to-batch reproducibility and immediate backup when your regular supplier changes specifications without notice. We deliver in smaller quantities or full container loads at preferential pricing, depending on your operation.
The profiles are divided into two main families, both central to construction:
It uses a resin with a higher K-value (higher molecular weight) than that of the siding, which is more difficult to fuse, and compensates with an additive package designed to maintain line speed. The output, however, is determined by the apparent density of the mix and the filler level of the formula.
Decorative and finishing profiles (semi-flexible versions are also available).
The type of impact modifier changes depending on whether you are looking for a bright, vibrant color or a matte finish; our lubricants also help to enhance the shine.
Gutters, tiles and panels: require UV, antioxidant and antimicrobial protection.
Thick-section windows and profiles produced with a cellular structure to lower the cost per piece and improve acoustic performance. This requires a foaming agent, its activator, and a system to maintain a uniform cell structure.
Our plasticizers, flexible stabilizers, epoxidizing agents, and lubricants provide the flexibility and property retention required by window seals and gaskets.
Technical seals that require flexibility and good recovery.
Parts in contact with moisture where antifungal properties are sought to prevent bad odors and mold, these properties are obtained by incorporating zinc pyrithione into the formulation.
Flexible sealing profile for doors and windows.
With FDA-approved additives for contact with water. In hose. co-extruded, The most important thing is to withstand high water pressure and rough handling: the section helical It needs sufficient impact resistance to prevent leakage when stepped on, driven over, or stored in a warehouse.
For flexible profiles, medium or high molecular weight resins are used (due to their good plasticizer absorption), with DOP/DOTP, epoxidized, and lubricants. For water hose, FDA-approved grades and an impact modifier (CPE) are selected in the helical structure.
| Function in formulation | Chemical Additives Products | Specific application |
|---|---|---|
| Average molecular weight | K 63 PVC resin | Rigid profile, channels and sheet |
| Medium/low molecular weight | K 61 PVC resin | Semi-rigid profile, edge banding and moldings |
| Flexible profile | PVC resin K 68, K 70 | Seals, gaskets and hose |
| Function in formulation | Chemical Additives Products | Specific application |
|---|---|---|
| One-pack / rigid stabilization | UA-1199 MX WT, LC-8228M, RT-435-L, RT-198, RT-9172 | Rigid and semi-rigid profile |
| Flexible stabilization (seals/weathers) | MW-188, LOX-901-NH, LOX-E068-H, LOX-368-HRF | Flexible profile |
| Function in formulation | Chemical Additives Products | Specific application |
|---|---|---|
| MBS for crystals and color | LB-136, MB 875 | Core-shell particle for (semi)rigid transparent and opaque interiors: preserves shine and color, and maintains low-temperature impact resistance |
| MBS for opaque | LB-156 | High impact efficiency on matte or opaque interior profiles, even in cold conditions |
| Impact with CPE | CPE-135-A | Elastomeric mesh for outdoor use (window and door profile, exterior); usually combined with acrylic |
| ABS | IM-812 | Greater impact when the critical requirement is cold performance, and with good weather resistance |
| Function in formulation | Chemical Additives Products | Specific application |
|---|---|---|
| Plasticizer | DOTP, DOP | Seals, gaskets, O-rings; medium/high molecular weight resins |
| Co-stabilizer | Epoxidized Soybean Oil (ESBO) | Color stability |
| Optical brightener | Optical brightener | In transparent, flexible parts, such as tubing, it enhances the visual appeal of the finished product — a sought-after effect in food and medical applications. |
| Function in formulation | Chemical Additives Products | Specific application |
|---|---|---|
| Benzophenone UV absorber | UV ABSORBER 3C | Products exposed to the elements |
| Benztriazole UV absorber | UV ABSORB P | Combines with HALS and antioxidant |
| Antioxidant phosphite | DOVERPHOS-8 | Color co-stabilizer (rigid/weatherproof) |
| Function in formulation | Chemical Additives Products | Specific application |
|---|---|---|
| Antimicrobial agent | Zinc pyrithione | Inhibits the growth of bacteria and fungi on parts constantly exposed to moisture: flexible bathroom seals, drain and floor covers, sink traps, mats, and outdoor profiles. Prevents unpleasant odors and mold-related degradation. |
| Function in formulation | Chemical Additives Products |
|---|---|
| External waxes and lubricants | LS-1608-AH, HB-310, MB 100, EBS |
| Function in formulation | Chemical Additives Products | Specific application |
|---|---|---|
| Process aid (rigid extrusion) | PA-912 (REACH SVHC), AID-LP 175 | They promote gelation and melt strength, improve flow and output, prevent melt cracking, regulate die swell, and widen the process window; vital in rigid profiles. They are not lubricants: they perform the opposite function. |
| Function in formulation | Chemical Additives Products | Specific application |
|---|---|---|
| foaming agent | AC-7000 | Rigid PVC foam in thick-section windows and profiles: reduces the cost per piece and provides acoustic performance. Its fine particle size (3–5 microns) forms a uniform, crack-free cell. |
| Activator (kicker) | LOX-0180 | It lowers the activation temperature of the foaming agent and makes its use more efficient: the same density is achieved with a smaller dose of foaming agent. |
| High molecular weight process aid | PA 970 | Necessary for foaming rigid profiles: maintains melt strength and stabilizes cell structure |
| Optical brightener | Optical brightener | In a rigid white profile, calcium carbonate tends to yellow the piece. The right combination of titanium dioxide and optical brightener corrects this yellowing and produces a visibly whiter profile. |
In rigid profile foaming, the processing aid plays a role as crucial as the foaming agent itself: it maintains melt strength and stabilizes the gas cells, allowing for lower densities with a uniform cell structure. Without this support, the cells collapse or open up, and the profile loses both the cost savings and the acoustic performance that were desired. Therefore, the foaming agent is formulated as a system—foaming agent, activator, and processing aid—and not as an isolated additive.
| Rule | Applicable Chemical Additives | Relevance |
|---|---|---|
| REACH / RoHS | RT-198, LOX-368-HRF, PA-912 | Export profile |
Immediate availability in national warehouse. Stabilizers, impact and UV in stock for delivery in 24-72 hours.
Partial lots or full container loads at preferential prices. Ideal when the additive is a fraction of the compound.
One-stop-shop. The complete package of rigid and flexible profiles from a single supplier.
Backup in crisis. Material rated in days if your supplier fails.
Letters of compliance upon request. (REACH/RoHS for export).
An unsuitable impact modifier dulls the color. Recommendation: The correct impact modifier depends on whether the profile is colored/crystal or opaque/matte; our lubricants also support gloss. We'll guide you on the system for your finish.
Benzophenone-type UV absorbers may turn yellow when zinc chloride (from the mixed stabilizers) is present. Recommendation: Combine the UV absorber with antioxidant and phosphite to maintain the color; tin mercaptan stabilizers, which have low lightfastness, should be reinforced with these additives. We'll help you define the system.
The output of the line depends primarily on the apparent density of the mixture —bulk density—: the more mass the spindle carries per revolution, the more kilograms per hour come out of the die. The K value The resin's properties also influence something else: a higher K value (higher molecular weight) makes the resin more difficult to fuse, even though it provides better mechanical properties. And the burden which is added to the formula modifies the apparent density and, with it, the output of the profile. Recommendation: When changing resins or adjusting the loading level, the entire package must be checked; our process aids allow you to lower the melting temperature, reduce downtime, and improve output. Contact us to optimize your line.
Recommendation: It usually requires adjusting the extrusion temperature to lower the dough temperature and reinforcing it with special lubricants; it's also advisable to check the cooling tank. We'll help you determine the adjustment.
If the correct fusion is not achieved or there is insufficient impact resistance in the co-extrusion, the hose leaks —typically when stepped on, when a vehicle drives over it, or when it is stored in a warehouse—. Recommendation: We work on the fusion and reinforce the impact resistance of the helical section; we help you define the system (including grades with FDA approval for water).
Recommendation: If the problem stems from a lack of cohesion/melt strength, the solution is a process aid, not more lubricant (which pushes in the opposite direction). We'll help you determine which one you're lacking.
Recommendation: The impact depends not only on the dosage, but also on the degree of gelation, the melt temperature, and the resin; it's advisable to review the entire process, not just the pH. Contact us for a diagnosis.
Calcium carbonate, at the typical load levels of the rigid profile, tends to shift the profile's tone towards yellow. Increasing the titanium dioxide alone does not correct this: it increases opacity, but does not eliminate the yellow tint. RecommendationThe whiteness is restored with the correct balance between titanium dioxide and optical brightener. We help you determine the right balance for your load level.
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Does your volume not justify in-house formulation? Chemical Compounds offers compounds for rigid and semi-rigid profiles, electrical boxes, and window seals. View portfolio.
