Examples of 'allophanate' in a sentence
Meaning of "allophanate"
Allophanate: In chemistry, a term used to describe a salt or ester of allophanic acid
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- Any salt or ester of allophanic acid
How to use "allophanate" in a sentence
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allophanate
This enzyme is also called allophanate lyase.
Allophanate modified isocyanates which contain reactive unsaturation.
Zinc acetylacetonate is a preferred allophanate catalyst.
Allophanate modified isocyanates are also known in the art.
The said polyisocyanates may also be modified by allophanate groups.
Allophanate variants of these mixed prepolymers can also be used.
The conversion of urethane groups to allophanate groups may be assisted by catalysis.
The polyurethanes are derived from ethylenically unsaturated polyisocyanates containing allophanate groups.
These higher functionality allophanate products are referred to as polymeric allophanates herein.
Particularly preferred are polyisocyanate adducts containing allophanate groups and isocyanurate groups.
After the allophanate modified polyisocyanate has been prepared further polyisocyanate may be added.
A process for preparing a polyisocyanate containing allophanate groups by reacting a compound which.
The modified allophanate according to the invention therefore comprises at least one acrylate function.
A process for the production of polyisocyanates containing allophanate and isocyanurate groups.
As the allophanate and the trimer started to form, the reaction exothermed.
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One of the disadvantages of these aromatic allophanate polyisocyanates is their poor heat stability.
The carbamate group can then react with the isocyanate group to form an allophanate.
The present invention further provides an allophanate compound produced according the method just described.
Alkyl carbamate is produced at the initial stage of the reaction from allophanate and urea.
This was unexpected since the allophanate modified MDI is not storage stable.
The urethane group may then react with more isocyanate to form allophanate functionality.
However, properties of allophanate were not known in detail.
The products according to the present invention are polyisocyanates containing isocyanurate groups and allophanate groups.
As other raw material, allophanate can be used instead of urea.
The compositions of the present invention comprise a curing agent having at least three allophanate groups.
However, these polyisocyanates do not contain allophanate groups as required by the present invention.
An FTIR spectrum of the product included absorptions attributable to allophanate linkages.
In one preferred embodiment, however, the allophanate synthesis is ended while isocyanate functionality still remains.
Isocyanate derivatives, in particular polyisocyanates comprising at least one allophanate group ;.
Thus, the allophanate is true when the following condition is met, EPMATHMARKEREP.
And generally polyisocyanate having a urethodione structure or an allophanate structure has a low viscosity.
Allophanate group-containing polyisocyanates which may be prepared according to the processes disclosed in U. S.
The trimerization catalysts should also catalyze the formation of allophanate groups from urethane groups.
Reacting the allophanate with at least one ester, wherein the ester,.
Each proportion of urea, alkyl carbamate and allophanate is not limited.
The final allophanate of formula ( I ) is characterized by the following data,.
It is also possible to use polyisocyanates with isocyanurates, allophanate or uretdione structures.
Reacting the polymeric allophanate which contains catalyst stopper from ( I ), with.
Process for the production of poly-isocyanates containing allophanate groups.
At least one allophanate catalyst ; with.
Therefore, any method except waste disposal of allophanate was not found.
Examples 1-13 - Polyisocyanates containing allophanate and isocyanurate groups prepared from HDI or IPDI and a fluorinated alcohol.
The composition of claim 1, wherein the polyisocyanate component contains allophanate groups.
The preparation of an allophanate of formula ( I ).
Further, the inventors analyzed the solid substance and found that it is allophanate.
Such di - or polyisocyanate materials may have a biuret or allophanate structure or may be isocyanurates.
Preferred polyisocyanate adducts are the polyisocyanates containing isocyanurate, uretdione, biuret, iminooxadiazine dione and / or allophanate groups.
Acid to each mole of the allophanate catalyst, e . g.
Process for manufacturing low viscosity, ethylenically unsaturated polyurethanes containing allophanate groups.
The polyurethane had a content of allophanate groups of 0.38 meq / g of solid polyurethane.
