Examples of 'polyoxypropylene' in a sentence
Meaning of "polyoxypropylene"
Polyoxypropylene (noun) - a polymer compound with repeating propylene oxide units
How to use "polyoxypropylene" in a sentence
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polyoxypropylene
Polyoxypropylene glycols are the most preferred polyols.
This results in polydimethysiloxanes functionalized by polyoxypropylene groups.
The polyoxypropylene glycols may contain oxyethylene units.
A block refers to a single polyoxyethylene or polyoxypropylene segment.
The polyoxypropylene based polyols are preferred.
The polyetherpolyol is particularly preferably polyoxypropylene glycol.
Particularly preferred are polyoxypropylene diamines and polyoxytetramethylene diamines.
Preferably used nonionogenic surfactants are polyoxypropylene esters.
Polyoxypropylene diamines and triamines and mixtures thereof are preferred.
The hydrophilic moiety can contain polyoxypropylene.
Polyoxypropylene polyols are particularly preferred.
The polymeric polyol composition is a polyoxypropylene polyol.
Polyoxypropylene triol is preferred.
The prepolymers used are based on polyoxypropylene glycol.
The purification of the polyoxypropylene polymer can be by gel permeation chromatography.
See also
Especially preferred polyethers are polyoxypropylene glycols.
A polyoxypropylene segment containing two or more hydroxyl groups is an example of a polyether group.
Additional blocks of polyoxyethylene or polyoxypropylene can be present in a molecule.
Suitable polymers used in this system include polyoxyethylene and polyoxypropylene.
In the examples only such polyoxypropylene polyols have been used.
This leads to polydimethylsiloxanes which are functionalized with polyoxypropylene groups.
The polyoxypropylene glycol may contain oxyethylene moieties distributed randomly or in block fashion.
The polyoxyalkylene glycols may be polyoxyethylene glycols or polyoxypropylene glycols.
Most preferred polyethers are polyoxypropylene polyethers that do not contain ethylene glycol units.
These block copolymers contain polyoxyethylene and polyoxypropylene groups.
These are generally polyoxyethylene or polyoxypropylene condensates of organic compounds having reactive hydrogen atoms.
Polyalkylene glycols such as polyoxyethylene glycol and polyoxypropylene glycol.
The polyoxypropylene cap serves to limit the rate of reaction with the isocyanate.
Typical nonionic moieties include polyoxyethylene and polyoxypropylene moieties.
Polyoxyalkylene polyether polyamines like polyoxypropylene diamines and triamines and mixtures thereof are preferred.
This is typically achieved by reacting ethylene oxide onto a polyoxypropylene core.
The polyoxypropylene triols and the polyoxybutylene triols can optionally be capped with ethyleneoxy residues.
The polyoxyethylene segment is hydrophilic while the polyoxypropylene segment is hydrophobic.
Preferred first polyols are polyoxypropylene polyols and random copolymers of propylene oxide and ethylene oxide.
The polyoxyethylene segment is hydrophilic whereas the polyoxypropylene segment is hydrophobic.
For polyoxypropylene diols having equivalent weights of c . a.
These compositions are limited to polyols with a polyoxypropylene polyoxyethylene glycol structure.
Preferred examples of suitable polyoxy lower alkylene groups include polyoxyethylene and polyoxypropylene.
Other examples of suitable polymeric ethers include polyoxypropylene polyoxyethylene block copolymers.
Further, among such polyoxypropylene polyols, polyoxypropylene diol or polyoxypropylene triol is preferred.
The polyalkylene groups are preferably selected from among polyoxypropylene and polyoxybutylene.
Polyoxyethylene polyoxypropylene glycols such as poloxamers e . g.
The polyoxyalkylene block itself is made up of a polyoxyethylene block followed by a polyoxypropylene block.
There may be also used polyether glycols such as polyoxypropylene glycol and polyoxytetramethyl glycol.
Polyethers containing amino end groups may be prepared by hydrogenation of cyanoethylated polyoxypropylene ethers.
Further nonionics include polyoxyethylene polyoxypropylene block polymers such as poloxamers and Pluronics.
The formulation of the present invention comprises two different polyoxypropylene polyols.
Preferably, the polyamine is a polyoxypropylene polyamine or a polyoxyethylenepropylene polyamine.
A particularly useful group of amines are amines derived from polyoxypropylene diols and triols.
Such amines include polyoxypropylene diamines of the formula,.
