Q: Ca/Zn vs Organotin — when does the higher organotin cost pay off?

Organotin (especially methyltin mercaptide) is essential for transparent rigid PVC where Ca/Zn opacity is unacceptable — bottles, blister packaging, transparent sheet/film. For opaque rigid PVC (pipe, profile, opaque sheet), Ca/Zn is cost-equivalent or better at same performance. Methyltin mercaptide at 1.0–1.4 phr gives processing-window equivalence to Ca/Zn at 2.5–3.5 phr — the lower dose offsets the higher per-kg cost. Methyltin also delivers superior clarity (95% light transmission for 1mm sheet vs 60% with Ca/Zn that contains opaque Ca and Zn stearates) — critical for pharmaceutical blister packs, beverage bottles, and clear-window envelope film. Butyltin mercaptide is methyltin's predecessor; it offers slightly better long-term heat stability but has higher tin content (so higher cost) and is restricted in food-contact use under FDA — only specific methyltin compounds qualify per 21 CFR 178.2010. Reverse-mercapto-tin (RM-tin, with thioglycolate ester groups) provides improved color stability for premium clear applications. Organotin chemistry is hazardous and has its own SVHC scrutiny — formulators using Ca/Zn-equivalent chemistry for transparent applications (Galata BlueEdge series and competitors) are gaining share in this segment.

Q: CPE vs MBS vs ACR — which impact modifier should I use?

CPE for rigid pipe, profile, and outdoor application (good weatherability, lowest cost). MBS for transparent and high-clarity applications (transparent sheet, food-contact film). ACR for window profile and high-gloss surface (processing aid + impact in one chemistry). CPE (chlorinated polyethylene with 30–40% Cl) is the workhorse — adds 5–15 phr to PVC compound, raises notched Izod from 3 to 50–80 kJ/m². CPE has excellent UV weatherability (no double bonds to oxidize) and is the standard for outdoor pipe and fence. CPE is opaque, so it cannot be used in transparent applications. MBS (methyl methacrylate-butadiene-styrene) provides high-clarity impact modification — the methyl-methacrylate phase matches PVC refractive index, the polybutadiene core provides toughening. MBS at 6–12 phr gives transparent rigid sheet (95% light transmission with PVC) and the standard for food/pharma blister packaging. MBS has poor weatherability (butadiene oxidation) — not for outdoor use. ACR (acrylic, methyl-methacrylate-butyl-acrylate-methacrylic-acid copolymer) is a process aid first and impact modifier second — improves melt strength and surface gloss; gives modest impact improvement (30–50 kJ/m² notched Izod). ACR is the choice for window profile where surface gloss and dimensional stability matter most.

Q: What is the difference between K-value and PVC molecular weight?

K-value is a viscometric measure of PVC molecular weight per ISO 1628-2 — higher K-value = higher MW = stronger but harder to process. Common ranges: K-57 (rigid pipe), K-60-65 (general rigid), K-70 (flexible film), K-77 (medical tubing). Stabilizer dose increases with K-value due to thermal degradation risk during processing. K-value (Fikentscher K-value) is calculated from relative viscosity of a 0.5% PVC solution in cyclohexanone at 30°C. It correlates with weight-average molecular weight: K-57 ~50,000 Mw; K-65 ~85,000 Mw; K-70 ~110,000 Mw; K-77 ~165,000 Mw. Higher K-value gives stronger, more impact-resistant parts but narrower processing window — degradation onset temperature decreases with MW, and required stabilizer dose increases. Standard practice: K-57 (PVC-U pipe, sheet) processes easily with 1.5 phr Ca/Zn; K-67-70 (flexible film) needs 2-3 phr; K-77 (medical tubing) needs 3-4 phr plus enhanced co-stabilization. Most compounder spec sheets list K-value explicitly — if K-value is not in the spec, request it from the resin supplier before finalizing the additive package.

Q: Do I need REACH SVHC compliance for PVC additives?

Required if your finished PVC product (or any imported article containing PVC) enters EU markets. SVHC restriction applies to lead, cadmium, chromium VI, mercury (heavy metals), specific phthalates (DEHP, DBP, BBP, DIBP, DINP, DIDP at varying age-of-product restrictions), and organotin variants. Compliance documentation per article must be on hand if requested by EU customs or end-consumer. REACH SVHC Annex XIV (Authorization List) and Annex XVII (Restriction List) are the binding regulations. For PVC compounds: DEHP, DBP, BBP, DIBP are restricted in articles since 2013 (Annex XVII Entry 51); DINP and DIDP restricted in toys and childcare since 2014. Lead in PVC for drinking-water pipe is restricted by EU Drinking Water Directive (2020 revision) requiring <0.0125 mg/m² total leaching. Organotin: dibutyltin and tributyltin restricted in textile articles, food-contact applications. Most modern PVC compounders avoid all of these — Ca/Zn stabilizers + DOTP / DEHTP / DINCH plasticizers (non-restricted alternatives to DEHP) is the standard EU-export formulation. Chemzip supplies declarations including REACH Article 33 (notification of SVHC content above 0.1%) for each batch. For complete compliance documentation including testing per EN 71-3 (heavy metal migration), additional sample-testing fees apply.

Q: How do Chinese PVC additive prices compare to Galata, Baerlocher, Reagens?

Commodity Ca/Zn solid stabilizer from Chinese producers is 40–55% lower CIF than equivalent European brand. Specialty grades (Ca/Zn liquid medical-grade, organotin food-contact, MBS for transparent application) narrow the gap to 20–35% as Chinese producers have closer technical match. Calcium-zinc one-pack from 山东金阳 / 广州天科 at $2.0–2.8/kg CIF Asian ports vs Baerlocher Baeropan MC 9001 at $3.5–5.0/kg. CPE from 山东亚星化学 at $1.6–2.2/kg vs Mitsui CPE at $2.8–3.5/kg. MBS from 山东日科 at $4.5–5.5/kg vs Dow Paraloid at $7-9/kg. Quality has converged for commodity grades — Chinese producers have invested in continuous compounding and pelletization equipment matching EU standards. Galata, Baerlocher, and Reagens retain pricing premium on application-specific formulations (premium window-profile packages with specific weatherability data, automotive-grade with specific OEM approvals, pharmaceutical-grade with specific compendia compliance) where regulatory and warranty matter more than per-kg cost. For pipe / profile / sheet commodity volume, Chinese supply is now the global default with European brands serving the premium tier.

Q: What is PCR-PVC compatibilizer and when do I need it?

PCR-PVC (post-consumer recycled PVC) streams contain mixed-source PVC with different K-values, residual stabilizer chemistries, and contamination — direct blend with virgin PVC gives poor properties. PCR-PVC compatibilizer (specialty modified-MBS or modified-ACR) bridges this incompatibility, enabling 30–60% PCR content in new compound formulations. EU's Single-Use Plastics Directive (2019) and revised Packaging and Packaging Waste Regulation (2024) set minimum recycled-content targets: 25% PCR in PVC packaging by 2025, 30% by 2030. UK and California have similar mandates. PCR-PVC streams (typically from pipe / sheet / window-profile collection) come with multiple challenges: K-value variation (K-57 from sheet vs K-67 from window mixed), residual Ca/Zn from old formulations (sufficient for stability but inconsistent batch-to-batch), pigment contamination (white, gray, brown blended), and micro-contamination from non-PVC plastics (PET caps on PVC bottles). Compatibilizer is a specialty modified polymer (typically a graft copolymer with affinity for both virgin and recycled-stream PVC chains) added at 2–5 phr to virgin/PCR blend, restoring impact strength and surface finish. Major suppliers: Galata BlueEdge series, Dow Paraloid Recycle series, Chinese 山东日科 specialty grade. Premium formulations target 50% PCR content while matching virgin-PVC property spec — increasingly required by EU/UK construction product certifications.

Q: What documents come with the PVC additive?

COA, SDS/MSDS, TDS standard. REACH Article 33 SVHC declaration; RoHS compliance certificate; FDA 21 CFR 178.2010 letter for food-contact organotin grades; NSF/ANSI 14 compliance for pipe-grade Ca/Zn; certificate of origin and country-of-origin labelling for FTA preferential tariff. Each Ca/Zn batch's COA includes: appearance, melt point, density, Ca/Zn ratio, ash content, free fatty acid, particle size, moisture. Organotin COA includes: tin content, mercaptide chain length, color (APHA), water content, free organic acid. Impact-modifier COA includes: K-value or intrinsic viscosity, particle size distribution, melt-flow index, residual monomer (acrylonitrile for MBS), volatiles. REACH Article 33 declaration confirms SVHC content < 0.1% (if any), with specific substance listing if applicable. RoHS certificate covers cadmium, mercury, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers, phthalates listed. For food-contact applications, FDA letter cites the specific 21 CFR 178.2010 sub-paragraph for the supplied organotin compound. For drinking-water pipe Ca/Zn, NSF/ANSI 14 third-party test certificate covering lead, antimony, and dissolved-substance migration is required. Country-of-origin Chinese GACC certificate enables FTA preferential rates (e.g., ASEAN-China FTA, RCEP, China-EU Investment Agreement).

Q: MOQ, packaging, lead time for PVC additives?

Samples 1–3 kg free; standard commercial MOQ is 500 kg–1 ton for stabilizers and impact modifiers. Packaging: 25 kg multi-ply paper bag with PE liner (powder), 200 kg HDPE drum (liquid stabilizer), 1 t jumbo bag. Lead time 2–3 weeks Asia, 5–7 weeks EU/NA. Ca/Zn solid stabilizer shelf life is 24 months in sealed PE-lined bag below 30°C. Organotin shelf life 12 months — degrades with moisture, requires N₂-blanket on opening for repeated use. Liquid Ca/Zn and Ba/Zn shelf life 18 months in original HDPE drum. MBS and ACR shelf life 12-18 months, must stay below 30°C to prevent agglomeration. CPE shelf life 24+ months, very stable. Container-load economics: 20-foot container holds 22-25 t powder additives or 18-22 t liquid additives. Sea-freight Asia-EU 4-5 weeks, Asia-NA 3-4 weeks, Asia-India 10-15 days. PVC additive supply chain often includes warehoused inventory at major importer port-of-entry (Rotterdam, Houston, Mumbai, Manzanillo) for faster delivery on standard grades — Chemzip can route through these channels for 1-2 week delivery on commodity grades.

Question 1

Why did the global PVC stabilizer market move away from lead?

Accepted Answer

EU RoHS Directive (2006) banned lead in electronics, followed by REACH SVHC listing of lead compounds (2008–2011), Vinyl 2010 voluntary EU industry commitment to eliminate lead in pipe by end-2015, and similar transitions in China (GB 17219 drinking-water pipe limits) and the US (NSF/ANSI 14 for pipe). By 2020 global PVC lead stabilizer share dropped from 70% (2005) to <5% (only legacy non-regulated markets). Lead-based stabilizers (basic lead sulfate, dibasic lead phthalate, tribasic lead sulfate) provided excellent heat stability at low cost — 2–3 phr lead delivered processing windows equivalent to 3–4 phr Ca/Zn. The phase-out cost the industry roughly 30% formulation re-engineering: Ca/Zn needs co-stabilizers (organic phosphite, beta-diketone, polyols) that lead didn't, and Ca/Zn formulations are more sensitive to PVC K-value, processing temperature, and filler load. The replacement chemistry took 5–8 years to mature; by 2018 Ca/Zn formulations matched lead's processing window and surpassed it on weatherability. The phase-out is environmental rather than performance-driven — once mature, Ca/Zn is technically equivalent or superior. Some non-regulated markets (parts of Africa, Latin America, Central Asia) still use lead-based PVC for water pipe — these are increasingly being addressed by national regulation tied to ISO 4422 / NSF 14 alignment.

Question 2

Ca/Zn vs Organotin — when does the higher organotin cost pay off?

Accepted Answer

Organotin (especially methyltin mercaptide) is essential for transparent rigid PVC where Ca/Zn opacity is unacceptable — bottles, blister packaging, transparent sheet/film. For opaque rigid PVC (pipe, profile, opaque sheet), Ca/Zn is cost-equivalent or better at same performance. Methyltin mercaptide at 1.0–1.4 phr gives processing-window equivalence to Ca/Zn at 2.5–3.5 phr — the lower dose offsets the higher per-kg cost. Methyltin also delivers superior clarity (95% light transmission for 1mm sheet vs 60% with Ca/Zn that contains opaque Ca and Zn stearates) — critical for pharmaceutical blister packs, beverage bottles, and clear-window envelope film. Butyltin mercaptide is methyltin's predecessor; it offers slightly better long-term heat stability but has higher tin content (so higher cost) and is restricted in food-contact use under FDA — only specific methyltin compounds qualify per 21 CFR 178.2010. Reverse-mercapto-tin (RM-tin, with thioglycolate ester groups) provides improved color stability for premium clear applications. Organotin chemistry is hazardous and has its own SVHC scrutiny — formulators using Ca/Zn-equivalent chemistry for transparent applications (Galata BlueEdge series and competitors) are gaining share in this segment.

Question 3

CPE vs MBS vs ACR — which impact modifier should I use?

Accepted Answer

CPE for rigid pipe, profile, and outdoor application (good weatherability, lowest cost). MBS for transparent and high-clarity applications (transparent sheet, food-contact film). ACR for window profile and high-gloss surface (processing aid + impact in one chemistry). CPE (chlorinated polyethylene with 30–40% Cl) is the workhorse — adds 5–15 phr to PVC compound, raises notched Izod from 3 to 50–80 kJ/m². CPE has excellent UV weatherability (no double bonds to oxidize) and is the standard for outdoor pipe and fence. CPE is opaque, so it cannot be used in transparent applications. MBS (methyl methacrylate-butadiene-styrene) provides high-clarity impact modification — the methyl-methacrylate phase matches PVC refractive index, the polybutadiene core provides toughening. MBS at 6–12 phr gives transparent rigid sheet (95% light transmission with PVC) and the standard for food/pharma blister packaging. MBS has poor weatherability (butadiene oxidation) — not for outdoor use. ACR (acrylic, methyl-methacrylate-butyl-acrylate-methacrylic-acid copolymer) is a process aid first and impact modifier second — improves melt strength and surface gloss; gives modest impact improvement (30–50 kJ/m² notched Izod). ACR is the choice for window profile where surface gloss and dimensional stability matter most.

Question 4

What is the difference between K-value and PVC molecular weight?

Accepted Answer

K-value is a viscometric measure of PVC molecular weight per ISO 1628-2 — higher K-value = higher MW = stronger but harder to process. Common ranges: K-57 (rigid pipe), K-60-65 (general rigid), K-70 (flexible film), K-77 (medical tubing). Stabilizer dose increases with K-value due to thermal degradation risk during processing. K-value (Fikentscher K-value) is calculated from relative viscosity of a 0.5% PVC solution in cyclohexanone at 30°C. It correlates with weight-average molecular weight: K-57 ~50,000 Mw; K-65 ~85,000 Mw; K-70 ~110,000 Mw; K-77 ~165,000 Mw. Higher K-value gives stronger, more impact-resistant parts but narrower processing window — degradation onset temperature decreases with MW, and required stabilizer dose increases. Standard practice: K-57 (PVC-U pipe, sheet) processes easily with 1.5 phr Ca/Zn; K-67-70 (flexible film) needs 2-3 phr; K-77 (medical tubing) needs 3-4 phr plus enhanced co-stabilization. Most compounder spec sheets list K-value explicitly — if K-value is not in the spec, request it from the resin supplier before finalizing the additive package.

Question 5

Do I need REACH SVHC compliance for PVC additives?

Accepted Answer

Required if your finished PVC product (or any imported article containing PVC) enters EU markets. SVHC restriction applies to lead, cadmium, chromium VI, mercury (heavy metals), specific phthalates (DEHP, DBP, BBP, DIBP, DINP, DIDP at varying age-of-product restrictions), and organotin variants. Compliance documentation per article must be on hand if requested by EU customs or end-consumer. REACH SVHC Annex XIV (Authorization List) and Annex XVII (Restriction List) are the binding regulations. For PVC compounds: DEHP, DBP, BBP, DIBP are restricted in articles since 2013 (Annex XVII Entry 51); DINP and DIDP restricted in toys and childcare since 2014. Lead in PVC for drinking-water pipe is restricted by EU Drinking Water Directive (2020 revision) requiring <0.0125 mg/m² total leaching. Organotin: dibutyltin and tributyltin restricted in textile articles, food-contact applications. Most modern PVC compounders avoid all of these — Ca/Zn stabilizers + DOTP / DEHTP / DINCH plasticizers (non-restricted alternatives to DEHP) is the standard EU-export formulation. Chemzip supplies declarations including REACH Article 33 (notification of SVHC content above 0.1%) for each batch. For complete compliance documentation including testing per EN 71-3 (heavy metal migration), additional sample-testing fees apply.

Question 6

How do Chinese PVC additive prices compare to Galata, Baerlocher, Reagens?

Accepted Answer

Commodity Ca/Zn solid stabilizer from Chinese producers is 40–55% lower CIF than equivalent European brand. Specialty grades (Ca/Zn liquid medical-grade, organotin food-contact, MBS for transparent application) narrow the gap to 20–35% as Chinese producers have closer technical match. Calcium-zinc one-pack from 山东金阳 / 广州天科 at $2.0–2.8/kg CIF Asian ports vs Baerlocher Baeropan MC 9001 at $3.5–5.0/kg. CPE from 山东亚星化学 at $1.6–2.2/kg vs Mitsui CPE at $2.8–3.5/kg. MBS from 山东日科 at $4.5–5.5/kg vs Dow Paraloid at $7-9/kg. Quality has converged for commodity grades — Chinese producers have invested in continuous compounding and pelletization equipment matching EU standards. Galata, Baerlocher, and Reagens retain pricing premium on application-specific formulations (premium window-profile packages with specific weatherability data, automotive-grade with specific OEM approvals, pharmaceutical-grade with specific compendia compliance) where regulatory and warranty matter more than per-kg cost. For pipe / profile / sheet commodity volume, Chinese supply is now the global default with European brands serving the premium tier.

Question 7

What is PCR-PVC compatibilizer and when do I need it?

Accepted Answer

PCR-PVC (post-consumer recycled PVC) streams contain mixed-source PVC with different K-values, residual stabilizer chemistries, and contamination — direct blend with virgin PVC gives poor properties. PCR-PVC compatibilizer (specialty modified-MBS or modified-ACR) bridges this incompatibility, enabling 30–60% PCR content in new compound formulations. EU's Single-Use Plastics Directive (2019) and revised Packaging and Packaging Waste Regulation (2024) set minimum recycled-content targets: 25% PCR in PVC packaging by 2025, 30% by 2030. UK and California have similar mandates. PCR-PVC streams (typically from pipe / sheet / window-profile collection) come with multiple challenges: K-value variation (K-57 from sheet vs K-67 from window mixed), residual Ca/Zn from old formulations (sufficient for stability but inconsistent batch-to-batch), pigment contamination (white, gray, brown blended), and micro-contamination from non-PVC plastics (PET caps on PVC bottles). Compatibilizer is a specialty modified polymer (typically a graft copolymer with affinity for both virgin and recycled-stream PVC chains) added at 2–5 phr to virgin/PCR blend, restoring impact strength and surface finish. Major suppliers: Galata BlueEdge series, Dow Paraloid Recycle series, Chinese 山东日科 specialty grade. Premium formulations target 50% PCR content while matching virgin-PVC property spec — increasingly required by EU/UK construction product certifications.

Question 8

What documents come with the PVC additive?

Accepted Answer

COA, SDS/MSDS, TDS standard. REACH Article 33 SVHC declaration; RoHS compliance certificate; FDA 21 CFR 178.2010 letter for food-contact organotin grades; NSF/ANSI 14 compliance for pipe-grade Ca/Zn; certificate of origin and country-of-origin labelling for FTA preferential tariff. Each Ca/Zn batch's COA includes: appearance, melt point, density, Ca/Zn ratio, ash content, free fatty acid, particle size, moisture. Organotin COA includes: tin content, mercaptide chain length, color (APHA), water content, free organic acid. Impact-modifier COA includes: K-value or intrinsic viscosity, particle size distribution, melt-flow index, residual monomer (acrylonitrile for MBS), volatiles. REACH Article 33 declaration confirms SVHC content < 0.1% (if any), with specific substance listing if applicable. RoHS certificate covers cadmium, mercury, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers, phthalates listed. For food-contact applications, FDA letter cites the specific 21 CFR 178.2010 sub-paragraph for the supplied organotin compound. For drinking-water pipe Ca/Zn, NSF/ANSI 14 third-party test certificate covering lead, antimony, and dissolved-substance migration is required. Country-of-origin Chinese GACC certificate enables FTA preferential rates (e.g., ASEAN-China FTA, RCEP, China-EU Investment Agreement).

Question 9

MOQ, packaging, lead time for PVC additives?

Accepted Answer

Samples 1–3 kg free; standard commercial MOQ is 500 kg–1 ton for stabilizers and impact modifiers. Packaging: 25 kg multi-ply paper bag with PE liner (powder), 200 kg HDPE drum (liquid stabilizer), 1 t jumbo bag. Lead time 2–3 weeks Asia, 5–7 weeks EU/NA. Ca/Zn solid stabilizer shelf life is 24 months in sealed PE-lined bag below 30°C. Organotin shelf life 12 months — degrades with moisture, requires N₂-blanket on opening for repeated use. Liquid Ca/Zn and Ba/Zn shelf life 18 months in original HDPE drum. MBS and ACR shelf life 12-18 months, must stay below 30°C to prevent agglomeration. CPE shelf life 24+ months, very stable. Container-load economics: 20-foot container holds 22-25 t powder additives or 18-22 t liquid additives. Sea-freight Asia-EU 4-5 weeks, Asia-NA 3-4 weeks, Asia-India 10-15 days. PVC additive supply chain often includes warehoused inventory at major importer port-of-entry (Rotterdam, Houston, Mumbai, Manzanillo) for faster delivery on standard grades — Chemzip can route through these channels for 1-2 week delivery on commodity grades.

PVC Application	Heat Stabilizer Class	Impact Modifier	Typical Stabilizer Dose	Recommended Grade
Pipe (Pressure)	Calcium-Zinc (Ca/Zn) — solid one-pack	CPE 7-9 phr	1.5–3.0 phr Ca/Zn	Calcium Zinc Stabilizer + CPE Impact Modifier
Pipe (Non-Pressure / Sewer)	Calcium-Zinc — economic grade	ACR 4-6 phr (gloss) or none	1.0–2.0 phr Ca/Zn	Calcium Zinc Stabilizer + ACR
Window Profile (Rigid)	Ca/Zn — high-weatherability + co-stabilizer	MBS 5-8 phr (clarity) or ACR 4-6 phr	2.5–4.0 phr Ca/Zn + 0.3 phr phosphite	Ca/Zn Stabilizer + MBS + Phosphite Co-Stab
Sheet (Rigid)	Ca/Zn or Organotin (clarity)	MBS 4-8 phr (transparent)	Ca/Zn 1.5–2.5 phr OR Organotin 1.0–1.5 phr	Ca/Zn or Organotin + MBS
Sheet (Calendered, Flooring)	Ba/Zn liquid	ACR (gloss)	Ba/Zn 1.5–3.0 phr	Barium Zinc Stabilizer + ACR
Film (Rigid, Pharma)	Organotin (transparent)	MBS 6-12 phr	Organotin 1.2–1.8 phr	Organotin Stabilizer + MBS
Film (Flexible, Cling)	Ca/Zn liquid + epoxidized soybean oil	—	Ca/Zn liquid 0.8–1.5 phr + ESO 3 phr	Ca/Zn Liquid + ESO Plasticizer
Cable Jacket	Ca/Zn or Ba/Zn (cost-sensitive)	—	1.5–2.5 phr stabilizer	Ca/Zn or Ba/Zn + flexible plasticizer
Bottle (Transparent)	Organotin (food contact: 21 CFR 178.2010)	MBS 6-10 phr	Organotin 1.0–1.4 phr	Organotin Stabilizer (food-grade) + MBS
WPC (Wood-Plastic Composite)	Ca/Zn — high-thermal-stability	CPE or ACR (gloss option)	2.5–4.0 phr Ca/Zn + heat-stabilizer pack	Ca/Zn + CPE + Phosphite Co-Stab
PCR-PVC Recycled Compound	Ca/Zn + extra co-stabilizer	CPE 8-12 phr (compatibilize PCR streams)	3.0–5.0 phr Ca/Zn + 0.5 phr phosphite	Ca/Zn + CPE + PCR-PVC Compatibilizer
Medical Tubing (Flexible)	Ca/Zn liquid (low-migration)	—	Ca/Zn 1.0–1.8 phr	Ca/Zn Liquid (USP / FDA grade)

International Brand Grade	China Equivalent	Major Chinese Producers
Baerlocher Baeropan MC 9001 / Reagens (Ca/Zn)	Ca/Zn Pipe Stabilizer one-pack	广州天科化工, 北京钰宝, 山东金阳
Galata Chemicals Ca/Zn Liquid	Ca/Zn Liquid for Film/Medical PVC	上海陶氏-台化, 山东金阳, 杭州天禾
Akcros Mark BZ liquid (Ba/Zn)	Barium-Zinc Liquid Stabilizer	山东金阳, 杭州天禾, 河南焦作
Galata Chemicals Mark 17M (methyltin)	Methyltin Mercaptide 17-type	锦湖日丽 (KKPC), 山东恒昇, 江苏聚成
PMC Group Thermolite (butyltin)	Butyltin Mercaptide	山东恒昇, 江苏聚成, 浙江龙海
Galata Mark T1101 / Reverte Phosphite	Tris(nonylphenyl) Phosphite / Phosphite Co-Stabilizer	利安隆, 营口风光, 江苏极易
Mitsui Chemicals Tafmer (TPO/CPE blend)	CPE Impact Modifier (35% Cl, Mw 200K)	山东亚星化学, 浙江晨园, 浙江三鹰
Dow Paraloid MBS-K (MBS)	MBS Impact Modifier K-equivalent series	山东日科 (Rike), 山东金山, 江苏南天
Dow Paraloid K-120N (ACR)	ACR Impact Modifier / Processing Aid	山东日科, 山东金山
Galata Group BluEdge (compatibilizer)	PCR-PVC Compatibilizer	山东日科 (specialty), 浙江雅迪 (Yadi)
Reagens (CaSt + ZnSt co-stab)	Calcium / Zinc Stearate Co-stabilizer	中山泰升, 江苏国胜, 河南焦作

PVC Heat Stabilizers, Impact Modifiers & Processing Aids

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Calcium-Zinc & Barium-Zinc Heat Stabilizers(4)

Calcium Zinc Stabilizer

Barium Zinc Stabilizer

Ba-Zn Heat Stabilizer

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Organotin (Tin Mercaptide) Heat Stabilizers(3)

Organotin Heat Stabilizer

Organotin Stabilizer

Organotin Heat Stabilizer

Impact Modifiers — CPE, MBS, ACR(5)

CPE Impact Modifier (Chlorinated Polyethylene)

CPE Impact Modifier

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PCR-PVC Compatibilizer

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