韩国进口 聚四氢呋喃醚(PTMEG）2000

聚四氢呋喃醚 PTMG（PolyTetramethylene-ether-Glycol）

H0-(CH2CH2CH2CH20)n-H

PTMG作为醚型多元醇其主要特点： 主要用作聚氨酯中的软段，能够提供聚氨酯产品良好的耐水解性、耐低温性及动态性质。

韩国PTG的PTMG产品由于它的价格实惠，大量供应于弹性纤维，合成革树脂，特别是水性聚氨酯得合成。常备规格有分子量650，850，1000，1400，1800，2000，3000。

SALES SPECIFICATIONS AND PHYSICAL PROPERTIES PTMEG 250 650 1000 1400 1800 2000 3000 Appearance A White waxy solid,and may become transparent liquid over a room temperature Molecular

Weight(g/mol) 250±20 650±25 1000±50 1400±50 1800±50 2000±50 3000±50 Hydroxyl

Number

(mgKOH/g) 416～488 166～180 107～118 77.4～83.1 60.7～64.1 54.7～57.5 36.8～38.0 Color

(AHPA,MAX) 40 40 40 30 30 30 40 Water

(wt ppm,max) 200 150 150 150 150 150 150 Acid Number

(mgKOH/g,max) 0.05 0.05 0.05 0.05 0.05 0.05 0.05 Peroxide

(wt ppm,max) 5 5 5 5 5 5 5 Stabilizer

(BHT,wt.ppm) 220±50 220±50 220±50 220±50 220±50 220±50 220±50 lron

(wt ppm,max) 1 1 1 1 1 1 1 TYPICAL PHYSICAL PROPERTIES Viscosity

(Cps,40℃） 46 203 270 660 1215 1300 1340 Specific Gravity

(40/4℃) 0.991 0.984 0.981 0.978 0.976 0.974 0.970 Melting Point

(℃) -8～-4 23～25 25～26 27～29 29～31 30～32 31～33 Flash Point

(Open cup ,℃) Over 280 Over 280 Over 280 Over 280 Over 280 Over 280 Over 280 Solubility Readily soluble in alcohols,esters and ketones,aromatic and chlorinated hydrocarbons.

Insoluble in aliphatic hydrocarbons and water. Has a tendency to decrease its solubility as

molecular weight increase. Hygroscopicity These PTMEG are all hygroscopic.At room temperature,PTMEG can absorb up to 2wt%

water depending on the molecular weight