Examples of 'urethane groups' in a sentence
Meaning of "urethane groups"
urethane groups - chemical compounds consisting of two carbonyl groups linked by an ethylene group
How to use "urethane groups" in a sentence
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urethane groups
Urethane groups being part of the backbone are particularly preferred.
An isocyanate terminated polyether containing urethane groups in the backbone resulted.
The conversion of urethane groups to allophanate groups may be assisted by catalysis.
Further a catalyst may be used which enhances the formation of urethane groups.
The presence of urethane groups causes the products to have a high viscosity.
Note that the use of a diol forms urethane groups in the polyurea.
This also includes those polymers which are virtually or entirely free of urethane groups.
The variants containing urethane groups are also widely known and commercially available.
The amino groups of the core molecule are blocked by conversion to urethane groups.
The linkages formed are hydrolytically stable urethane groups and the hydrogels are nondegradable in water.
If desired a catalyst may be used which enhances the formation of urethane groups.
These compounds preferably contain one or more urethane groups and may optionally contain urea groups.
The crosslinker can have allylether groups and further ester or urethane groups.
Z is the average of urethane groups per molecule, z being zero or a positive number, and.
Suitable methods for preparing the polyisocyanate mixtures containing urethane groups are known.
See also
Reaction products containing urethane groups based on these di-and polyisocyanates are also suitable.
Also polyisocyanate adducts containing urea and urethane groups can also be used.
However, urethane groups are preferably not a part of the block copolymer of the present invention.
This also includes materials with a higher amount of urethane groups than isocyanurate groups.
Preferred polyisocyanate adducts are the polyisocyanates containing isocyanurate groups, biuret groups or urethane groups.
Urethane groups can be formed by use of a polyisocyanate ( e.g. a diisocyanate ) as the reagent.
The final adhesive product is an irreversible material polymerized primarily through urea and urethane groups.
These polymers have urea groups, urethane groups and / or mixtures thereof.
The trimerization catalysts should also catalyze the formation of allophanate groups from urethane groups.
Advantageously, the molar ratio between the urethane groups and the ester groups is less than 0.05.
A PIR rigid foam is a material that in general also contains a certain amount of urethane groups.
It is preferred if A contains urea or urethane groups.
The composition of claim 1, wherein the polyisocyanate component contains urethane groups.
However, preferred are the urea and urethane groups.
The composition as claimed in claim 1, wherein polyetherurethane has at least three urethane groups.
These are formed, for example, by numerous amide or urethane groups.
Hydrolysable groups include ester, carbonate, phosphazene, amide and urethane groups.
Known methods are, for example, etherification, esterification, amidation and formation of urea or urethane groups.
I may also have additional bridging . groups such as esters, ethers, ureas, or urethane groups.
In case the pre-polymers all contain hydroxyl end-groups, the linking units will be urethane groups.
A carbodiimide of formula ( I ) having terminal urea and / or urethane groups.
These linking groups will be, for example, amide, ester, ether or urethane groups.
Exemplary polyisocyanates contain esters, ureas, biurets, allophanates, carbodiimides, uretonimines, and urethane groups.
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Examples of using Urethane
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This was made from urethane coated nylon
He uses urethane bowling balls almost exclusively
Decorative topcoats based on urethane or epoxy are preferred
