24968-12-5

Basic information

• Product Name: POLY(1,4-BUTYLENE TEREPHTHALATE)
• Synonyms: Poly(oxy-1,4-butanediyloxycarbonyl-1,4-phenylenecarbonyl);polytetramethyleneterephthalate;POLY(BUTYLENE TEREPHTHALATE);POLY(1,4-BUTYLENE TEREPHTHALATE);1,4-BUTYLENE TEREPHTHALATE POLYMER
• CAS NO: 24968-12-5
• Molecular Formula: (C12H12 O4)n
• Molecular Weight: 256.25200
• Product Categories: Esters;Hydrophobic Polymers;Polymer Science;Hydrophobic Polymers;Materials Science;Polymer Science;Polymers
• Mol File: 24968-12-5.mol
• Article Data: 8

Chemical Properties

• Melting Point: 228℃
• Appearance: /pellets
• Density: 1.31 g/mL at 25 °C(lit.)
• CAS DataBase Reference: POLY(1,4-BUTYLENE TEREPHTHALATE)(CAS DataBase Reference)
• NIST Chemistry Reference: POLY(1,4-BUTYLENE TEREPHTHALATE)(24968-12-5)
• EPA Substance Registry System: POLY(1,4-BUTYLENE TEREPHTHALATE)(24968-12-5)

Safety Data

• WGK Germany: 3
• Hazardous Substances Data: 24968-12-5(Hazardous Substances Data)

Usage

Uses

Molded into auto parts, electrical components and domestic appliance assemblies.

Upstream product

• 55011-60-4 1,4-butandiol monobutyrate 
• 94497-51-5 Am80 
• 261529-46-8 4-hydroxybutyl 2-propylpentanoate 
• 99-66-1 valproic acid 
• 153559-46-7 4-[(3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydro-2-naphthyl)carbonyl]benzoic acid 
• 1370556-53-8 4-hydroxybutyl 4-(3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydronaphthalene-2-carbonyl)benzoate 
• 153559-49-0 bexarotene 
• 1370556-56-1 4-hydroxybutyl 4-(1-(3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydronaphthalen-2-yl)vinyl)benzoate 
• 142650-55-3 4-formylbenzoic acid allyl ester 
• 23358-95-4 bis(4-hydroxy-butyl) terephthalate 
• 142650-66-6 4-(allyloxycarbonyl)benzoic acid 
• 100-20-9 terephthaloyl chloride 
• 18520-63-3 monobenzyl terephthalate 
• 19851-61-7 p-dibenzyl benzenedicarboxylate 

Downstream Products

• 24968-12-5 C₂₃H₂₈O₆ 
• 24968-12-5 C₄₆H₄₂O₁₂ 
• 63440-94-8 butylene terephthalate cyclic trimer 

Relevant articles and documents

Preparation method of cyclic poly (butylene terephthalate) (by machine translation)

The invention discloses a cyclic trimetric polybutylene terephthalate preparation method. The method comprises the steps: (a) preparing bis(4-(4-allyl terephthaloyl oxy)butyl)polyethylene terephthalate (III) from bis-(4-hydroxyl butyl)-polyethylene terephthalate (I) and 4-(allyloxy carbonyl)benzoic acid (II) under action of a condensing agent and an auxiliary reagent; (b) preparing cyclic trimetric polybutylene terephthalate precursor (IV) by ring closure of the bis(4-(4-allyl terephthaloyl oxy)butyl)polyethylene terephthalate (III) under the action of a Grubbs catalyst and lewis acid; (c) hydrogenating the cyclic trimetric polybutylene terephthalate precursor under the action of Pd/C to obtain cyclic trimetric polybutylene terephthalate (V). The preparation method disclosed by the invention has the advantages that the raw materials are cheap and easy to obtain, a synthesizing route is simple and short, a yield is high, and conditions are easy to control.(The formula is shown in the description.).

A practical synthesis of the cyclic butylene terephthalate trimer

This paper described a practical synthetic approach for the cyclic butylene terephthalate trimer (7). The key step was a ring-closing metathesis, using Grubbs' second-generation catalyst to form the macrocyclic ring. The advantages of this procedure included short reaction steps, simple operations and good yields.

Cyclic polybutylene terephthalate preparation

The invention specifically discloses a preparation method of novel cyclicpolybutylece terephthalate (PBT) dimer, wherein paraphthaloyl chloride and 1,4-butanediol are used as the raw materials for oriented synthesis of the cyclicpolybutylece terephthalate dimer through a protection and deprotectionstrategy, and the method is used for contrast analysis and detection of cyclicpolybutylece terephthalate dimer impurities in a PBT plastic. The chemical structural formula of the cyclicpolybutylece terephthalate dimer is described in the specification.