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US 4,474,933 AGranted
Crosslinking resin mixtures
AssigneeDynamit Nobel Aktiengesellschaft
InventorsHans Huber, Eduard Hansel, Gerhard Geier
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AssigneeDynamit Nobel Aktiengesellschaft
InventorsHans Huber, Eduard Hansel, Gerhard Geier
Estimating the term…
The present invention relates to resin mixtures which are fluid at temperatures up to 100.degree. C. and which crosslink either at elevated temperature or under the influence of moisture. Thermal crosslinking takes place at temperatures of 100.degree. C. and up, preferably at about 120.degree. C. The mixtures contain one or more mutually compatible polymers containing hydroxyl groups, in which at least 5% and not more than 90% of the hydroxyl groups are replaced by alkoxysilyl groups. The introduction of the alkoxysilyl groups is accomplished by the reaction of a diisocyanate with a hydroxyl group on the polymer, on the one hand, and with an aminosilane or mercaptosilane ester on the other. On the basis of their fluid-to-viscous consistency at room temperature or moderately elevated temperature, the resins can be applied in a thin coating and easily crosslinked in situ.
A crosslinkable resin mixture which is liquid at temperatures below 100.degree. C., is made from polymers containing hydroxyl groups and having a molecular weight of 500 to 30,000, and wherein 5 to 90 mol.-% of the hydroxyl groups originally present in the mixture have been replaced by the reaction product of an organosilane of the general formula ##STR4## wherein R.sub.1 =H or alkyl, cycloalkyl, aryl or aralkyl, R.sub.2 =C.sub.1 -C.sub.5 alkylene, R.sub.3 =methyl or ethyl, R.sub.4 =alkyl or alkoxyalkylene of up to 4 carbon atoms, and n=0 or 1 or 2, with a monomeric or polymeric di- or triisocyanate.
A crosslinkable resin mixture which is liquid at temperatures below 100.degree. C., from polymers containing hydroxyl groups and having a molecular weight of 500 to 30,000, and wherein 5 to 90 mol.-% of the hydroxyl groups originally present in the mixture have been replaced by the reaction product of
Dependencies are inferred from the claim text.