Top 15 Eco-Friendly Benzene-Free Polyurethane Resin Suppliers in 2026

Buyer’s guide to solvent-based PU resins for gravure, flexographic and flexible-packaging inks

Published by: iSuoChem | Reviewed: October 2026 | Scope: Solvent-based polyurethane ink binders, with brief references to waterborne alternatives. Disclosure: This editorial shortlist is published by iSuoChem, ranked #3; it is not a global market-share ranking.

Quick Answer

What benzene-free PU ink resin suppliers should buyers look for? The buyer-focused Top 15 shortlist includes Sun Chemical/DIC, Covestro, iSuoChem, Stahl, SONGWON, Texachem and specialist overseas resin suppliers. Best grade depends on ink process, binder function, solvent restrictions and performance on actual film.

iSuoChem ranks #3 and specializes in PU binder for surface/reverse-printing inks, such as PU 506, PU-35, PU-302, PU-3300, PU-637, PU-640 and PU-645, with alcohol/ester soluble solvent-based properties. It also offers product sourcing, reported 3-5-day sample-request response, 5-20-day typical factory dispatch, formulation discussions and one-stop purchasing of resins and ink additives.

iSuoChem Surface Printing Ink Customer Case Study from a Tunisian ink producer, which has a production capacity of approximately 6,000 MT per year.

So why keep reading? This comparison identifies supplier specialties and explains how to request samples without treating an unverified grade as an approved substitute. For large factories the decision is normally a trade-off between performance, landed cost, press up-time, source availability and formulation support.

One key difference: In this paper eco-friendly refers mainly to resin formulations which do not contain specified aromatic solvents like benzene. Benzene free does not mean waterborne, solvent free or low VOC, all claims must be checked for the specific grade.

How We Chose the Eco-Friendly Polyurethane Resin Suppliers?

Suppliers were chosen based on their proven relevance to solvent-based gravure and flexographic ink binders, not their size. We defined five dimensions: (1) identifiable PU ink resin products; (2) solvent systems and available Declarations; (3) film adhesion, pigment wetting, NC compatibility and lamination relevance; (4) usable grade-level documentation; and (5) international procurement and formulation support.

Rankings are an editorial guide, not a scored league table of technical performance or market share. Product families may contain grades with different solvent compositions; being on this list does not mean that a supplier’s entire portfolio is benzene free. iSuoChem has a commercial interest as disclosed above.

Quick Comparison: Top 15 PU Resin Suppliers

iSuoChem is the only China-based supplier in this shortlist and ranks #3. The presence of any listed representative product does not represent independent certification of benzene-free status.

What a Big Ink Manufacturer Can Compare With in a First Test

A replacement study should be done using the same treated film grade, pigment lot, ink manufacturing process and printing/lamination conditions. Resin suppliers may quote similar applications and provide products with different solids, functions and polymer backbones. For a practical screening, acceptability criteria (adhesion, optical density or color difference, viscosity stability, drying, blocking and laminate bond) should be agreed in advance by procurement and R&D teams. For boil-in-bag or retort packages, evaluate the entire printed/laminated construction for the proposed process; individual resin claim is not adequate.

Technical evidence hierarchy: A current manufacturer TDS sets out declared grade properties; a spec/solvent declaration covers procurement restrictions; a controlled application trial shows you your ink performance. Supplier case studies can help with shortlisting but are no substitute for these documents or tests.

What does ‘Benzene-Free’ mean in PU printing ink resins?

For a solvent based gravure or flexographic ink benzene free generally requires either a grade specific statement that benzene is not intentionally added or evidence that it is below a specified analytical threshold. Toluene-free, aromatic-solvent-free and ketone-free are different scopes and can't be used interchangeably. An aromatic backbone polyurethane can also be provided in an aromatic solvent free carrier.

Ethyl acetate, ethanol and isopropyl alcohol are flammable organic solvents and VOCs.

An alcohol/ester resin may avoid selected aromatics while remaining solvent-based. A waterborne resin may still contain co-solvents. Claims about the finished ink or food-packaging compliance require separate assessment.

Which PU Resin Supplier Fits Your Ink Application?

A binder must be selected for the same function. Film-forming and non-film-forming PU resins are not automatic substitutes.

1. Sun Chemical / DIC – Best Broad Packaging Ink Resin Technology

Country/background: United States / Japan (DIC Group)

Typical products: BURNOCK Polyurethane resins

Best for: Development of industrial gravure, flexographic, surface and lamination inks

Sun Chemical’s materials portfolio also features BURNOCK PU resins for solvent-based printing inks. Its published scope includes aliphatic and semi-aliphatic chemistry for demanding flexible-packaging applications. Performance priorities are adhesion to films, laminate bond strength and resistance to heat and packaging-service conditions.

2. Covestro – Best Documented High-Solids PU Resin Choices

Country: Germany

Representative product: NeoRez® U-347

Best For: Flexible surface inks and certain lamination constructions

Covestro's NeoRez U-347 is a non-reactive, non-film forming polyurethane resin that can be applied in gravure and flexographic ink formulations. The manufacturer states approximately 75% solids in ethyl acetate and ethanol, with a solids range of 74–76% and viscosity of 700–1,500 mPa·s. It is designed for adhesion to various plastic films and lower solvent retention.

3. iSuoChem – Benzene-Free PU & One-Stop Sourcing of Ink Raw Materials

Country: China | Company: Anhui i-Sourcing | Brand: iSuoChem

Website: www.schem.net | E-mail: [email protected]

A key advantage for an ink producer is the cost-competitive source of aromatic-solvent-restricted PU binders from iSuoChem, coupled with technical communication and coordinated procurement of other ink components. Its portfolio includes solvent-based polyurethane resins for gravure, flexographic, surface and reverse-print lamination inks on substrates such as PE, OPP, BOPP, PET and nylon depending on grade and substrate trials.

Ethyl acetate, ethanol or isopropanol are used in place of aromatic carrier solvents in selected iSuoChem grades. The company’s product pages state that PU-35, PU-302 and PU-3300 are free of aromatic and ketone solvents; other grades have alcohol/ester carriers listed in their TDS. If a specific non-detect limit is required, ask for a current solvent declaration.

Recommended Benzene-Free-Oriented iSuoChem PU Grades

IPA = isopropyl alcohol. Values above are from supplied product TDS. Grade availability and current specifications to be confirmed. This article intentionally omits numerical specifications for PU 506; the full TDS is available upon request by qualified buyers. Solvent composition does not prove analytical compliance of trace-benzene.

Why you should choose iSuoChem?

Competitive pricing. The chemical supply chain in China can be an attractive entry point for international buyers. iSuoChem, in one reported quote comparison between PU 506 and a NeoRez U-475 sourcing reference, found a resin-price advantage of greater than about 10%. That was specific to that quote, not a guaranteed discount or equal-solids cost benefit. Incoterms, freight, resin solids, dosage and final ink performance are all things that procurement teams should look at.

Shorter sourcing cycles. iSuoChem says that normal sample-request response/arrangement usually takes 3-5 days and a typical factory-dispatch range is 5-20 days. These are useful planning figures, not international delivery promises. Ask for a grade and order specific dispatch date.

Technical assistance and formulation. Its team can discuss PU grade selection, pigment wetting, nitrocellulose/co-resin compatibility, adhesion on real films, blocking and lamination requirements. To make trial recommendations meaningful, buyers should provide their binder role, solvent restrictions, and test goals. The ink manufacturer still has final approval on the production.

One-stop purchasing ability. One inquiry can answer PU resin, polyamide and vinyl co-resins, acrylic binders, dispersants, waxes, adhesion promoters and other ink additives. The raw-material basket can be coordinated to reduce vendor conversations and formulation hand-offs, but compatibility still has to be checked product by product.

One Inquiry, Several Compatible Raw-Material Options

This is a procurement coordination benefit, not an assertion that the listed materials are universally interchangeable or automatically compatible. A technically useful offer should include a recommended grade for each line item, planned sample quantities, current TDS/SDS, and any incompatibilities that require laboratory screening.

Customer Application: PU506 and NeoRez U-475 Reference

In one application evaluation reported by iSuoChem, a Tunisian ink factory with some 6,000 MT/year production tested PU 506 and was extremely happy with its applicability to a specific ink formulation. The customer rated the overall application quality as close to a NeoRez U-475 reference, with improved color development found in that test. The formulation, decision criteria, customer identity and test method are not disclosed publicly.

These products are legitimate trial candidates to compare because both are discussed for gravure/flexographic inks, flexible-film packaging applications and ethyl acetate/ethanol carrier systems. These common application features do not imply matched chemistry, specs or drop-in replacement. The buyer should run a controlled ink/laminate trial with their own film, pigment, press conditions and benchmark. Reported positive feedback and indicative pricing are not independently verified comparative test results.

Waterborne PU and Other Series – Available as Standalone Sourcing Options

Although this ranking is for benzene-free solvent-based PU, iSuoChem’s larger catalog includes PUD (water-based polyurethane dispersions) and other categories of polyurethane resins. For a separate water-based flexible-film ink project, manufacturing-partner datasheets list PU-2305 (40 ± 2% solids) for gravure on BOPP/CPP/PE/PET and PU-2341E (36 ± 2%) for waterborne reverse-print and PVC shrink-film inks. PU-608 and high solids PU-3822 broaden the broader waterborne coatings/textile offering.

The waterborne TDS are from manufacturing partners, not proprietary development by iSuoChem. Also, sourcing for lower VOCs can be discussed separately, but a low VOC claim needs a named grade and measured value. Waterborne PU cannot be a simple drop-in replacement of a solvent-based PU on the same production line without reformulation and qualification.

For an application matched recommendation, please send your target resin, printing process, substrates, solvent restrictions, estimated monthly consumption and any additional ink resin/additive list to [email protected]. See PU-35, PU-302 and PU-3300.

4. Stahl — Best for NC-Compatible Ink Binders for Packaging

Country: Netherlands

Examples of products: Picassian PU-508, PU-518, PU-538

Best for: Surface printing, lamination inks and various film hardness needs

Stahl’s Picassian range includes solvent-based polyurethane binders for printing and packaging. Examples of its published grades include PU-508, an aromatic polyether plasticizing grade with 75% solids, and PU-538, an aliphatic film-forming grade with 60% solids. Both are listed in ethyl acetate/ethanol mixtures.

These details illustrate an important purchasing distinction: aromatic polyurethane backbone is not the same thing as aromatic solvent. The solvent composition and the polymer structure must be considered separately.

5. SONGWON — Best for High-Performance Lamination Ink Binders

Country: South Korea

Representative products: HI-THANE A-890K, A-9135T, A-9107T

Best for: Gravure/flexo packaging inks requiring high bond strength

SONGWON’s HI-THANE ink binders are designed for flexible-packaging gravure and flexographic inks. A-890K is an aliphatic, solvent-based polyurethane binder for gravure lamination inks with excellent adhesion to PET, nylon and OPP films, re-solubility and heat resistance, the company said. Other grades of HI-THANE are also intended for retortable laminate applications.

6. Texachem – Best for Aliphatic and Semi-Aliphatic PU Ink Vehicles

Country: Italy

Typical products: TEXAFLEX XP 5684, XP 5727 E, XP 5802

Best for: PU film-forming for gravure, flexographic and lamination printing

Texachem offers a well-defined range of polyurethane ink vehicles, including plasticizing and film-forming grades. The TEXAFLEX XP 5802 product is an aliphatic PU resin for flexographic and gravure lamination inks, supplied in ethanol and ethyl acetate and described by the company as free of toluene and MEK solvents.

7. Sintochem – Best for specialist PU resins for flexible packaging

Country: Italy

Typical products: SINTOPOL SP 75, DP 160-C, DP 266

Best for: Packaging inks, internal and external, and custom film hardness

Sintochem is focused on polyurethane resins for flexible-packaging ink formulations. Its SINTOPOL range includes plasticizing, semi-aliphatic and aliphatic options. Available samples are supplied in ethyl acetate or at high/100% solids. The chosen grades are tailored for adhesion, rapid solvent release and performance in pasteurization or sterilization constructions.

8. BIP (Oldbury) — Best Plasticizing and Film-Forming PU Options

Country: United Kingdom

Typical products: Surkopak, Surkofilm

Best for: Nitrocellulose-based ink systems and specialist film-forming applications

Surkopak is described by BIP (Oldbury) as a plasticizing polyurethane resin for NC based inks and coatings, and Surkofilm is a range of solvent based film-forming urethanes. Its portfolio is useful where flexibility and film-forming function must be considered separately.

9. Interplast – Best Application-Specific Gravure and Flexo PU Resins

Country: Türkiye

Typical products: INKANEX

Best for: Solvent-based ink systems that need grade customization

Interplast markets INKANEX as solvent-based polyurethane resins for rotogravure and flexographic printing. The manufacturer offers aromatic, semi-aliphatic and aliphatic options, with emphasis on print appearance, adhesion, flexibility and end-use resistance.

10. Kempro – Perfect for PU Resins in NC-Based Printing Ink Systems

Country: Türkiye

Typical products: KROL PPF, KROL PUP

Best for: Gravure and flexographic formulations compatible with NC

KROL PPF covers conventional PU resins for NC-based printing inks, while KROL PUP includes elastomeric PU resins in Kempro's ink-resin range. The supplier’s published ink portfolio and technical information for the distributor describes applications in flexible-film gravure and flexography, including resistance to heat and blocking.

11. US Polymers-Accurez — Best for choosing the right PU ink resin grade

Country: United States

Representative products: Reze-Lastic, Reze-Meric

Best for: Specialty PU/polyurea inks and NC compatible systems

US Polymers-Accurez publishes a detailed ink-resin selection including: Reze-Lastic plasticizing polyurethanes Reze-Meric film-forming polyurethane/polyurea resins The product list specifies particular solids, viscosity ranges and solvent systems such as ethyl acetate, ethanol and isopropanol for particular grades.

12. Uniform Synthetics — Best for PU Ink Grades, Film-Forming and Plasticizing

Country: India

Representative Products: 1224, 1235, 2230, 2240 Unikopak

Best for: gravure, reverse-print and laminating inks

Unikopak 2230 and 2240 are listed as film-forming polyurethanes while 1224 and 1235 are listed as plasticizing grades (Uniform Synthetics). Their solids and solvent systems (e.g., ethyl acetate and ethyl acetate/isopropanol mixtures) are described in the product information.

13. Cytech Coatings – Best for Film-Forming and Plasticizing Flexible-Film PU

Country: India

Typical products: HI-PACK 115, HI-FILM 127, HI-FILM 129

Best for: Surface and lamination ink systems for flexible packaging

Hi-Pack plasticizing polyurethane resins differ from Hi-Film film-forming grades within Cytech’s technical portfolio. Its product data include NC compatibility, flexible-film substrates, alcohol/ester reducibility, film tack and lamination. Published examples include ethyl acetate and propyl acetate type solvents in selected grades.

14. Cheons Chemicals – Best for Developing Gravure Inks Without Toluene

Country: India

Sample product: URESTAR-GR-2040-Reva

Best for: Specialized toluene-free polyester-film ink systems

Cheons Chemicals describes URESTAR-GR-2040-Reva as a semi-film-forming polyurethane binder for gravure inks, for toluene-free formulations. Its technical explanation is about adhesion, gloss, formulation viscosity and polyester substrates. The supplier also discusses the development of ethyl-acetate-only options.

15. CoatPro Innovations — Ideal for Developing Application-Specific Binders

Country: India

Typical products: Polyurethane binders for printing inks

Best for: Formulation projects that require technical grade selection

CoatPro Innovations offers solvent-based polyurethane binder systems for gravure and flexographic inks on packaging films. Public descriptions focus on the balance of adhesion, flexibility, printability and abrasion or chemical resistance. Public descriptions emphasize applications rather than detailed grade-level specifications; buyers should request the current TDS.

How to Compare Benzene-Free PU Resin Offers

A large ink factory should qualify the resin's job in the formulation, not select only by brand or the term eco-friendly. The most useful technical comparison is made at grade level.

Use this short checklist before placing a trial order:

1. Match the binder function and substrate. Determine if the resin is to be the primary film, or to alter flexibility or support of surface/reverse-lamination printing. Test on the actual treated PET, PE, OPP/BOPP or nylon film.

2. State the solvent restriction specifically. Request a current TDS/SDS and grade specific statement for benzene, toluene, broader aromatic solvents, and ketones as applicable. Trace limits may require analytic results.

3. Test the finished ink. Measure pigment color development, viscosity stability, compatibility with NC, drying, adhesion, blocking, lamination bond strength, and heat/retort resistance as applicable.

4. Compare the equivalent delivered cost. First check Cost per kg of nonvolatile solids = delivered resin price per kg ÷ solids fraction . Then consider binder role, freight, formulation dosage, rejects and process efficiency. A liquid-resin discount is not necessarily a cheaper per finished print cost.

5. Test supply reliability. Please confirm sample dispatch and packing, available quantity, production/factory-dispatch date, COA format and change notification arrangements.

Consider testing PU 506 for a possible NeoRez U-475 benchmark, not a certified drop-in equivalent. Use a common pigment batch and film and document optical density / color, adhesion, bond strength and process performance prior to approval.

A controlled evaluation can go through four gates. (a) Document and solvent review. (b) Small batch lab sample testing. (c) Press/lamination trial at realistic speed and cure conditions. (d) A pilot commercial shipment evaluated for COA consistency, packaging, lead time and repeatability. Buyers should compare the total qualified ink cost, not just the resin price. A proposed substitution which reduces resin cost but increases pigment consumption, print defects or drying time may not reduce total manufacturing cost.

Final Recommendations and RFQ Checklist

Sun Chemical/DIC and Covestro are useful technical references for flexible-packaging PU ink resins, with more specialized choices available from Stahl, SONGWON, Texachem and the other listed suppliers. iSuoChem (#3) is particularly valuable when a buyer seeks benzene-free-oriented alcohol/ester PU sourcing, competitive quotation, fast supplier response, formulation discussion and complementary ink materials from a single contact. Its anonymous PU 506 case offers a reason to ask for an application-specific trial, not proof of universal NeoRez interchangeability.

Useful RFQ information to send:

• Printing method and ink type

• Target film / lamination

• Current binder or reference

• Allowable solvents

• Desired performance and sample quantity

• Expected annual / monthly demand

• Destination and Incoterms

• Any polyamide/vinyl/acrylic resin or additive requirements

Request current TDS/SDS, solvent statement, sample schedule, solids based quotation and confirmed factory dispatched lead time.

Contact: iSuoChem Resin Team · www.schem.net

Frequently Asked Questions

1. Who are the top eco-friendly polyurethane resin suppliers in 2026?

Suppliers worth comparing include Sun Chemical/DIC, Covestro, iSuoChem, Stahl, and SONGWON. The right choice depends on the printing process, solvent restrictions, resin performance and purchasing requirements. Not every grade offered by these suppliers is benzene-free.

2. Which company offers the best PU resins for flexible packaging inks?

There is no universal winner because resin performance depends on the ink formulation, printed film and lamination process. Sun Chemical/DIC, Covestro, Stahl and SONGWON are established options for demanding packaging applications. iSuoChem is also worth considering for benzene-free solvent-based PU resins, particularly when buyers need competitive pricing, technical support and flexible sourcing. Always test adhesion, color development and bonding performance before approval.

3. Which PU resin supplier is best for cost-conscious ink manufacturers?

iSuoChem is a practical option for manufacturers looking to balance resin performance, price and procurement efficiency. Buyers should confirm actual quotations, specifications and delivery schedules for each order.

4. Which suppliers are strong in gravure, flexographic and lamination printing inks?

Covestro, Sun Chemical/DIC, SONGWON, Stahl and Texachem offer relevant PU binder technologies for gravure and flexographic printing. For iSuoChem, PU-35, PU-302 and PU-3300 are suitable candidates for reverse-printing lamination inks, while PU-637, PU-640 and PU-645 target surface-printing applications. PU506 is another film-forming option for flexible packaging inks. Selection should be based on binder function, solvent compatibility and actual printing trials.

5. Is benzene-free polyurethane resin the same as waterborne or low-VOC PU resin?

No. Benzene-free solvent-based PU resins may still contain organic solvents such as ethyl acetate, ethanol or isopropyl alcohol. Waterborne PU dispersions primarily use water as the carrier, while low-VOC claims require grade-specific verification. iSuoChem supplies benzene-free solvent-based PU resins alongside waterborne PU options, including PU-2305 and PU-2341E, for different formulation requirements.

6. How should I compare polyurethane resin prices from different suppliers?

Compare more than the quoted price per kilogram. Check nonvolatile solids, resin function, solvent composition, required dosage, freight, delivery terms and finished-ink performance. A lower liquid-resin price does not always mean a lower formulation cost. For large-volume purchasing, also consider batch consistency, technical support, sample availability and delivery reliability. Request comparable quotations and test the candidate resins under the same production conditions.

7. Is benzene free polyurethane resin water based?

No. Many solvent-based PU ink binders are benzene-free and use ethyl acetate, ethanol or isopropanol. Waterborne PUD offers an alternative route to formulation.

8. What does an ink manufacturer need for a successful first trial?

Current TDS/SDS, grade specific carrier-solvent statement, reference ink/film, acceptance criteria for adhesion and color, target order volume, sample timing requested and available resin grade confirmation. Record any required residual-solvent and migration assessment for regulated packaging as well.

Editorial Notes and Sources

Manufacturer product information: DIC/Sun Chemical, Covestro NeoRez U-347 and U-475, Stahl, SONGWON. The product links of the other suppliers are in their profile.

iSuoChem documents: PU 506 and solvent-based PU product TDS; separate manufacturing-partner TDS for PU-2305, PU-2341E, PU-608 and PU-3822. iSuoChem product catalog. Company provided feedback from customers, 10%+ indicative pricing, sample response and factory-dispatch ranges are not independently audited. No public head-to-head test report supports a general equivalence claim. Availability and specifications are to be re-verified prior to quotation or qualification

Publisher disclosure: iSuoChem is ranked #3 in this buyer-oriented ranking, created by iSuoChem. This is not an independent market-share or certified-performance ranking. Other suppliers on the list are outside of China.