Polyaldimines
AssigneeSika Technology AG
InventorUrs Burckhardt
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Abstract
The invention relates to polyaldimines which may be obtained from at least one polyamine (A) with aliphatic primary amino groups and at least one aldehyde (B). Said polyaldimines are odourless as are the aldehydes (B) produced by hydrolysis thereof. The invention further relates to methods for production of said polyaldimines and aldehyde (B) and methods for hydrolysis of the polyaldimine. The use of said polyaldimine in compositions as adhesive, sealant, coating or covering agents is disclosed. Said polyaldimines are characterised in being odourless, rapidly hydrolysed on contact with water, no detectable odours being generated after hydrolysis thereof and stable to storage with the exclusion of water in compositions which contain components reactive towards amines.
Claims16
A polyaldimine which is obtainable from
- at least one polyamine A having aliphatic primary amino groups
- and
- at least one aldehyde B of the formula
- where Y1 and Y2 either
- independently of one another are an alkyl, aryl or arylalkyl group, which if desired may in each case be substituted, if desired may in each case contain heteroatoms and if desired may in each case contain unsaturated components;
- or Y1 and Y2
- are connected to one another to form a carbocyclic or heterocyclic ring which has a ring size of between 5 and 8, preferably 6, atoms and if desired contains one or two singly unsaturated bonds;
- and
- R1 stands either
- for a linear or branched alkyl chain having 11 to 30 carbon atoms, with or without at least one heteroatom, in particular with at least one ether oxygen, or for a singly or multiply unsaturated linear or branched hydrocarbon chain having 11 to 30 carbon atoms;
- or for
- or for
- where R2 is a linear or branched or cyclic alkylene chain having 2 to 16 carbon atoms, with or without at least one heteroatom, in particular with at least one ether oxygen,
- or is a singly or multiply unsaturated linear or branched or cyclic hydrocarbon chain having 2 to 16 carbon atoms,
- and
- R3 is a linear or branched alkyl chain having 1 to 8 carbon atoms.
Dependencies are inferred from the claim text.