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Essex Chemical Corp
Original Assignee
Essex Chemical Corp
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Publication date
Application filed by Essex Chemical CorpfiledCriticalEssex Chemical Corp
Priority to ES548370ApriorityCriticalpatent/ES8607996A1/en
Publication of ES8607996A1publicationCriticalpatent/ES8607996A1/en
Publication of ES548370A0publicationCriticalpatent/ES548370A0/en
A poly(meth)acrylate polymer of wt. ave. mol. wt. 1000-100000 (20000-60000) and having pendant hydrolysable alkoxysilane gps. attached to a poly(meth)acrylate backbone by urethane linkages, prepd. by reacting at least 75 equiv.% of the OH gps. of a poly(meth)acrylate having 3-100 pendant OH gps. per molecule with the isocyanate gp. of an isocyanato functional alkoxysilane of formula (I), the poly(meth)acrylate polymer being a copolymer formed from a monomer mixt. of one or more 2-6C hydroxyalkyl (meth)acrylates and one or more 1-8C alkyl(meth)acrylates. - OCN-R3-SiXnR4(3-n) (I) - X=lower alkoxy R4=H or lower alkyl R3=divalent (ar)aliphatic or aromatic organic radical, n=1-3.
Polyvinyl alcohol derivatives containing pendant vinylic monomer reaction product units bound through ether groups and hydrogel contact lenses made therefrom
Carbodiimide-group containing isocyanate derivatives, process for their preparation and their use as additive for aqueous solutions or dispersions of polymers.
Process for the preparation of low molecular weight hydroxy-functional (meth)acrylpolymers, their use in the preparation of prepolymers with isocyanate end groups and elastic sealants and adhesives prepared from these polymers.