It is liquid at room temperature and has excellent site remediation applications. There is no need to prepare the prepolymer first. It can be directly mixed with diisocyanate and then reacted to prepare the required product. The overall physical properties of the product made are similar to those of the traditional thermocuring system with MDI prepolymer. Meanwhile, its performance will be superior to these MDI/ diol thermosetting elastomer systems. When operated in a natural environment, SINEPOXY® CE-P650 based elastomers have a very low shrinkage rate.
SINEPOXY® CE-P650
(Amino-terminated polyether chain extender)
Chemical Name: Poly(1,4-butanediol) bis(4-aminobenzoate)，Versalink P-650 alternative
CAS No.: 54667-43-5
MF: C7H6NO.(C4H8O)n.C7H6NO
Molecular structure：
Item | Specification |
Appearance | Amber transparent viscous liquid |
Odour | Slight ammonia odor |
Viscosity | 3000-4000mPa.s(40°C) |
Moisture | <500ppm |
Amino equivalent | 430-460 |
Coatings
Adhensives
Sealants and spray systems
Cast prototypes and elastomers
25kgs/drum; 200kgs/drum.
Being kept in dry, clean warehouse with well ventilation.
Avoid exposing to light and heating.
Protecting the product from leakage, rain and insolation during transportation.
Q1: What is the best liquid diamine curative to replace Evonik's Versalink P-650?
A: SINEPOXY® CE-P650 is an alternative to Versalink® P-650. It shares the exact same chemical structure: Poly(1,4-butanediol) bis(4-aminobenzoate) (CAS 54667-43-5). It mirrors the benchmark's amine value, viscosity, and performance.
Q2: How does Poly(1,4-butanediol) bis(4-aminobenzoate) improve polyurethane elastomer properties?
A: This molecule combines low-toxicity aromatic amine groups with a flexible polyoxybutylene (PTMEG) backbone. When it reacts with polyurethane prepolymers, it forms a perfectly balanced phase-separated structure. This gives the cured polyurethane elastomers exceptional tensile strength, supreme tear resistance, excellent abrasion resistance, and outstanding long-term low-temperature flexibility.
Q3: Can CAS 54667-43-5 be used as an epoxy resin curing agent modifier?
A: Yes, absolutely. While it is predominantly used for polyurethanes, its terminal amine groups react efficiently with epoxy resins. Thanks to its long-chain polymeric backbone, it introduces high flexibility into the typically brittle epoxy network. This makes it an outstanding choice for structural adhesives, composite wind blades, and heavy-duty toolings that need high peel strength and impact resistance.
Q5: Where can I buy bulk Poly(1,4-butanediol) bis(4-aminobenzoate) at wholesale factory pricing?
A: You can choose us. Our brand SINEPOXY® CE-P650 guarantees a low moisture content (≤0.1%), strict batch consistency, and competitive direct-factory pricing. Contact our chemical sales engineers today to request an instant quote or to order a free sample!
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