| Identification | Back Directory | [Name]
Poly(propylene glycol) | [CAS]
25322-69-4 | [Synonyms]
ppg
p400
PPG-3
PPG-7
PPG-9
PPG-12
PPG-13
PPG-16
PPG-17
PPG-20
PPG-26
PPG-30
PPG-33
PPG-34
PPG-51
ppg-15
emkapyl
niaxppg
niax1025
oopg1000
polymer2
skf18667
p.p.g.150
p.p.g.400
p.p.g.425
p.p.g.750
p.p.g2025
p.p.g3025
p.p.g4025
niax11-27
laprol702
lineartope
niax61-582
laprol2002
bloatguard
p.p.g.1800
niaxppg425
p.p.g.1000
p.p.g.1025
p.p.g.1200
naptere8075
niaxppg1025
niaxppg3025
jeffoxppg400
pluracol1010
pluracol2010
pluracolp410
voranolp1010
voranolp2000
voranolp4000
propylan8123
pluracolp2010
desmophen360c
actocol51-530
p4000[polymer]
polyglycolp400
polyglycolp4000
alkapalppg-1200
alkapalppg-2000
alkapalppg-4000
Polypropanediol
polyglycolp-4000
polyglycolp-2000
niaxpolyolppg4025
POLYPROPYLENOXIDE
2-Propargylglycine
polypropylenglykol
Polyprolene glycol
polyglycoltypep250
polyglycoltypep400
polyglycoltypep750
polyglycoltypep3000
polyglycoltypep1200
polyglycoltypep2000
poly(propene oxide)
Polyropylene Glycol
POLYPROPYLENEGLYCOLS
Poly(propylene glyco
PPG)Poly(propylene g
COULOMETRY REAGENT K
poly(propyleneoxide)
glycols,polypropylene
polypropyleneglycol150
1,2-POLYPROPYLENEOXIDE
Poly(propylene glycol)
polypropyleneglycol#750
polypropyleneglycol3025
polypropyleneglycol4025
COULOMETRY REAGENT CG-K
polypropyleneglycol#1200
polypropyleneglycol#1800
methyl-oxiranhomopolymer
POLYPROPYLENE GLYCOL 700
POLYPROPYLENE GLYCOL 400
POLYPROPYLENE GLYCOL 4000
POLYPROPYLENE GLYCOL 2000
POLYPROPYLENE GLYCOL 1000
polypropylenglykol(czech)
Polypropylene glycol diol
propyleneoxidehomopolymer
POLYPROPYLENE GLYCOL MW400
POLYPROPYLENE GLYCOL P 425
POLYPROPYLENE GLYCOL P 400
PROPYLENE GLYCOL 400 POLYMER
POLYPROPYLENE GLYCOL ( PPG )
Poly(propylene oxide), PPG
POLYPROPYLENE GLYCOL MW 1000
PROPYLENE GLYCOL 2000 POLYMER
PROPYLENE GLYCOL 1000 POLYMER
PROPYLENE GLYCOL 4000 POLYMER
Poly propylene glycol (PPG4000)
Polyoxypropylene gIycerol ether
Polypropylene Glycol,Diol Type
Polypropylene glycol, MW ≈ 3,000
Polypropylene glycol, MW ≈ 4,000
POLYPROPYLENE GLYCOL STANDARD 810
POLYPROPYLENE GLYCOL STANDARD 460
Polypropylene glycol - 2000 grade
polypropylene glycol standard 5300
POLYPROPYLENE GLYCOL STANDARD 3'250
POLYPROPYLENE GLYCOL STANDARD 1'150
POLYPROPYLENE GLYCOL STANDARD 2'150
poly(propylene glycol) macromolecule
POLYPROPYLENE GLYCOL, DIOL TYPE, 700
POLYPROPYLENE GLYCOL, DIOL TYPE, 1000
POLYPROPYLENE GLYCOL, DIOL TYPE, 2,000
Poly(propylene glycol) average Mn ~425
Poly(propylene glycol) average Mn ~725
Poly(propylene glycol), average M.W. 400
Poly(propylene glycol) average Mn ~1,000
Poly(propylene glycol) average Mn ~2,000
Poly(propylene glycol) average Mn ~2,700
Poly(propylene glycol) average Mn ~4,000
Poly(propylene glycol), average M.W. 425
Poly(propylene glycol), average M.W. 2.000
Poly(propylene glycol), average M.W. 3.000
Poly(propylene glycol), average M.W. 4.000
POLY(PROPYLENE GLYCOL), AVERAGE MN CA. 4 25
POLY(PROPYLENE GLYCOL), AVERAGE MN CA. 7 25
alpha-hydro-omega-hydroxypoly(oxypropylene)
POLY(PROPYLENE GLYCOL), AVERAGE MN CA. 1 ,000
POLY(PROPYLENE GLYCOL), AVERAGE MN CA. 3 ,000
POLY(PROPYLENE GLYCOL), AVERAGE MN CA. 4 ,000
POLY(PROPYLENE GLYCOL), AVERAGE MN CA. 2 ,000
Poly(propylene glycol), average M.W. 2.000 500GR
Poly(propylene glycol), average M.W. 4.000 250GR
Poly(propylene glycol),PPG, Poly(propylene oxide)
Polypropyleneglycol 2000, Average Mn Approx. 2,000
Poly[oxy(methyl-1,2-ethanediyl)], α-hydro-ω-hydroxy-
PPG 5000 Propylene Glycol average Molecular weight 5000
alpha-hydro-omega-hydroxy-poly[oxy(methyl-2-ethanediyl)]
alpha-hydro-omega-hydroxy-poly(oxy(methyl-2-ethanediyl))
POLYPROPYLENE GLYCOL(PPG 400),Polypropylene Glycol(PPG-400)
2-ethanediyl)),.alpha.-hydro-.omega.-hydroxy-Poly(oxy(methyl-1
Poly(oxy(methyl-1,2-ethanediyl)),.alpha.-hydro-.omega.-hydroxy- | [EINECS(EC#)]
200-338-0 | [Molecular Formula]
(C3H6O)n | [MDL Number]
MFCD01779690 | [MOL File]
25322-69-4.mol | [Molecular Weight]
16.0425 |
| Chemical Properties | Back Directory | [Appearance]
Viscous colourless liquid (whose viscosity depends upon the average | [Melting point ]
-40 °C
| [Boiling point ]
>300 °C | [density ]
1.01 g/mL at 20 °C
| [vapor density ]
>1 (vs air)
| [vapor pressure ]
<0.01 mm Hg ( 20 °C)
| [refractive index ]
n20/D 1.451
| [Fp ]
230 °C
| [solubility ]
H2O: <0.01 % (w/w) at 25 °C
| [form ]
Viscous Liquid | [color ]
White to light gray | [Specific Gravity]
1.005 | [Stability:]
Stable. Substances to be avoided include strong oxidizing agents. | [Water Solubility ]
PRACTICALLY INSOLUBLE | [Uses]
Hydraulic fluids, rubber lubricants, antifoam
agents, intermediates in urethane foams, adhesives,
coatings, elastomers, plasticizers, paint formula-
tions, laboratory reagent.
| [NIST Chemistry Reference]
Polypropylene glycol 425(25322-69-4) | [EPA Substance Registry System]
Poly[oxy(methyl- 1,2-ethanediyl)], .alpha.-hydro-.omega.-hydroxy- (25322-69-4) |
| Hazard Information | Back Directory | [Chemical Properties]
Viscous colourless liquid (whose viscosity depends upon the average | [Definition]
ChEBI: A macromolecule composed of repeating propyleneoxy units. | [General Description]
Colorless liquid that is odorless or has a mild sweet odor. May float or sink in water. | [Reactivity Profile]
Poly(propylene glycol) is an alcohol. Flammable and/or toxic gases are generated by the combination of alcohols with alkali metals, nitrides, and strong reducing agents. They react with oxoacids and carboxylic acids to form esters plus water. Oxidizing agents convert them to aldehydes or ketones. Alcohols exhibit both weak acid and weak base behavior. They may initiate the polymerization of isocyanates and epoxides. | [Health Hazard]
The compound has a very low toxicity; few, if any, symptoms will be observed. Contact of liquid with eyes causes slight transient pain and irritation similar to that caused by a mild soap. | [Preparation]
Propylene oxide may be polymerized by methods similar to those described
in the preceding section for ethylene oxide. Similarly, polymers of low
molecular weight and of high molecular weight are of commercial interest.
(a) Low molecular weight polymers
Poly(propylene oxide)s of low molecular weight, i.e. in the range 500-3500,
are important commercial materials principally on account of their extensive
use in the production of both flexible and rigid polyurethane foams.
At first, the most common polyether used in flexible polyurethane foams
was a linear poly(propylene glycol) with a molecular weight of about 2000.
This is prepared by polymerizing the oxide at about 160??C in the presence of
propylene glycol and sodium hydroxide. The resulting
polymer has the following general form:
The majority of the hydroxyl groups in the polymer are secondary groups
and are rather unreactive in the urethane reaction. Initially, this limitation
was overcome by the preparation of pre-polymers and by the
use of block copolymers with ethylene oxide. The latter products are 'tipped'
with poly(ethylene oxide) and are terminated with primary hydroxyl groups
of enhanced reactivity:
(It may be noted that straight poly(ethylene glycol) is not satisfactory for
foam production owing to its water sensitivity and tendency to crystallize.)
The advent of more effective catalyst systems, however, now makes it
possible for poly(propylene oxide)s to be used in the preparation of flexible
polyurethane foams without recourse to the above mentioned procedures.
Also, it is now common practice to use polyethers which are triols rather than
diols; these lead to slightly cross-linked flexible foams with improved load
bearing characteristics. The triols are produced by polymerizing propylene
oxide in the presence of a trihydroxy compound such as glycerol, 1,1,1-
trimethylolpropane or 1,2,6-hexane triol; the use of, for example, trimethylolpropane leads to the following polyether triol:
Polyethers of molecular weights in the range 3000-3500 are normally used.
For the production of rigid polyurethane foams, polyether triols of lower
molecular weight (about 500) are used so that the degree of cross-linking is
increased. Alternatively, polyethers of higher functionality may be used; these
are prepared by polymerizing propylene oxide in the presence of hydroxy
compounds such as pentaerythritol and sorbitol.
(b) High molecular weight polymers
Poly(propylene oxide)s of high molecular weight, i.e., greater than 100000
have been prepared by the use of initiators similar to those employed in the preparation of high molecular weight poly(ethylene oxide)s.
The most extensively investigated initiators have been organoaluminium and
organozinc compounds, generally with added co-initiators. As has been
noted previously, the structural unit of poly(propylene oxide)
contains an asymmetric carbon atom and the polymer can exhibit tacticity.
Both atactic and isotactic poly(propylene oxide) have been prepared. As
normally obtained, i.e. from D-L-propylene oxide, the isotactic polymer is
optically inactive but optically active isotactic polymer has been produced
from L-propylene oxide. Except for their optical activity, both forms of
isotactic polymer are very similar in properties; they are both crystalline and
have a melting point of 74??C. Isotactic poly(propylene oxide)s have not yet
found commercial application. Atactic poly(propylene oxide) has been investigated as a rubber but does not appear to have been produced in any
quantity. | [Flammability and Explosibility]
Nonflammable |
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