Synthomer’s SYNOXOL™ BEPD (butyl ethyl propanediol) is a high performance aliphatic diol, with primary OH groups, for the synthesis of saturated and unsaturated polyesters. It is also an excellent choice for use as a chain extender or as part of polyester polyols in polyurethane systems.
Its branched structure increases hydrophobicity (water resistance), improves hydrolytic resistance and offers a reduction in crystallinity in the saturated polyester resin; whilst delivering harder but flexible mechanical performance. SYNOXOL™ BEPD also increases solvent compatibility and gives strong UV resistance for outdoor exposed applications.
Delivering an effective formulation design for high molecular weight, low viscosity unsaturated polyester resins (UPRs), SYNOXOL™ BEPD reduces VOC and styrene content with no adverse impact on outdoor durability or mechanical performance. In fact, it reduces water absorption and shrinkage upon cure, allowing the use of cost effective glycol blends as part of UPR formulation designs for demanding applications
SYNOXOL™ BEPD can be used both in the polyester polyol and as a chain extender in polyurethane systems. The use of SYNOXOL™ BEPD improves hydrolysis resistance and abrasion resistance. It’s branched structure reduces crystallinity, thus increasing transparency. When used within a polyurethane dispersion, it provides good film formation at low MFFT (minimum film forming temperature) leading to excellent aesthetics and high gloss finishes.
Key application areas:
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Saturated Polyester Applications
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Unsaturated Polyester Applications
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Polyurethane Applications
(PES Polyol, Chain Extender, PUD)
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Coil & Extrusion Coatings
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Gelcoats
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Automotive, Wood & Industrial Coatings
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Can Coatings
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Engineered stone/marble
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RHM, 2K Solvent /
Waterbased Adhesives
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Powder Coatings
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Composites
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Artificial Leather
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Outdoor fabric & Sportswear
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TPU plastic & components
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Key Features:
| Polyester Coil Coatings | Polyester Powder Coatings | UPR Gelcoats & Composites | Polyurethane Applications |
| Increased hardness | Improved bloom resistance down to 140-160°C cure temp | Reduced viscosity | Higher hydrolysis resistance |
| Lower VOC & Styrene content | Improved abrasion resistance |
| Improved flexibility | Reduced gel time | Lower water absorption | Improved water resistance |
| Higher UV resistance | Higher UV resistance | Higher flexural strength | Higher transparency |
| Increased spreading rate (m²/Lt) | Increased reactivity | Lower shrinkage upon cure | Lower MFFT |
| Improved cost/m² | Reduced energy cost | Improved UV resistance | Higher gloss |
| Tradename |
Chemistry |
Description |
| SYNOXOL™ BEPD |
OTH |
2-Butyl-2-Ethyl-1,3-PropanediolWhite crystalline solidDiol containing primary hydroxyl groupsThe product is FDA approvedCAS number: 115-84-4EC (EINECS) number: 204-111-7HS number: 2905 39 |
| SYNOXOL™ BEPD70L |
OTH |
BEPD 70L is a mixture of 2-Butyl-2-Ethyl-1,3-Propanediol (BEPD), Neopentyl Glycol and waterClear and colourless liquid at room temperatureDiol containing primary hydroxyl groupsCAS number: 115-84-4, 126-30-7, 7732-18-5EC (EINECS) number: 204-111-7, 204-781-0, 231-791-2 HS number: 3824 99
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Contact our technical specialists and customer services team for further information.
Email: CommercialSA@synthomer.com
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