Examples of 'free isocyanate' in a sentence
Meaning of "free isocyanate"
free isocyanate - a chemical compound that is available without charge or cost
How to use "free isocyanate" in a sentence
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free isocyanate
Free isocyanate groups are extremely reactive.
The kinetics are followed by determination of the free isocyanate.
Free isocyanate functional groups remain in the present compositions.
At least one component with free isocyanate groups.
The free isocyanate then undergoes the curing reaction.
The fixative agent may comprise free isocyanate groups.
Free isocyanate functional groups remain in the compositions of the invention.
The reaction is completed when no free isocyanate groups remain.
Free isocyanate groups allow for curing of the composition at temperatures as low as ambient.
The crosslinker preferably is a polyisocyanate having free isocyanate groups.
Polyurethane prepolymers containing free isocyanate groups are obtained without a solvent or in solution.
Preferably the resulting blocked polyisocyanate contains no free isocyanate groups.
Compounds comprising at least two free isocyanate functional groups are known in the art.
Suitable fixative agents are for example isocyanurates comprising free isocyanate groups.
The reaction is stopped when the free isocyanate content of the prepolymer is stable.
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Suitable polyisocyanates include organic compounds containing at least two free isocyanate groups.
Polyurethane prepolymers which contain free isocyanate groups are thus obtained as such or in solution.
Suitable fixable agents are for example isocyanates or isocyanurates comprising free isocyanate groups.
After a few hours there was no detectable free isocyanate as determined by infrared spectrophotometric analysis.
An intermediate polyurethane resin thus produced may be terminated with free isocyanate groups.
The free isocyanate groups may then be preferably capped with trimethylol propane or diethanolamine.
The isocyanate prepolymers with low free isocyanate monomers are preferred.
The free isocyanate groups may then be capped with known capping agents for isocyanates.
This temperature was held until the free isocyanate value was zero.
No residual free isocyanate was left after reaching this desired value of the Staudinger index.
The prepolymerizate contains an effective crosslinkable amount of free isocyanate functional groups.
The resulting product has two free isocyanate groups capable of forming a polyurethane with a polyol.
The amine released in turn reacts spontaneously with free isocyanate to give urea.
In preferred embodiments, the free isocyanate groups are blocked, for example by acetyl acetone.
Such a polyurethane is free from crosslinks and contains substantially no free isocyanate groups therein.
Besides free isocyanate groups, the polycarbodiimides can therefore also contain their aforementioned reaction products.
A derivatisating agent is added to stabilize the free isocyanate groups concurrently with their extraction.
Usually the polyisocyanate crosslinking agent is a fully capped polyisocyanate with substantially no free isocyanate groups.
Having a non-detectable free isocyanate group content ;.
Often the polyisocyanate curing agent is a fully capped polyisocyanate with substantially no free isocyanate groups.
When the free isocyanate content was no longer subject to change, 44 g of n-butanol were added.
Such a polyurethane is free from crosslinks and generally contains no free isocyanate groups therein.
Stirring was continued until no free isocyanate remained ( about 2 -3 hours ).
As component C it is preferred to use polyisocyanates containing free isocyanate groups.
The reaction is stopped when the free isocyanate content of the prepolymer is 2.7 %.
A fully capped polyisocyanate curing agent containing no free isocyanate groups ;.
After one to two hours at 60°C, no free isocyanate could be detected by IR.
The polyisocyanate is preferably a fully-capped polyisocyanate with substantially no free isocyanate groups.
The resulting dimeric mono-adduct has free isocyanate groups on each end.
Under the processing conditions, such blocked isocyanate would become unblocked to furnish free isocyanate.
After 8 hours, the amount of free isocyanate is null.
Thus, in one embodiment, the polyurethane prepolymer may be stripped of the free isocyanate monomer.
The reaction is complete when the free isocyanate content is 7.4 %.
The coating composition of claim 6 comprising at least one polyisocyanate having free isocyanate groups.
An aliquot of the mixture was taken and analyzed for free isocyanate and hydroxyl number.
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