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Primary Examiner: Welsh, M. J.
Assistant Examiner:
Attorney: Gil; Joseph C., Harsh; Gene

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Title: Process of preparation of synthetic resins by reacting a cross-linked isocyanate polyaddition product with low molecular weight polyisocyanate followed by reaction with an amino alkyl silane

Abstract: Isocyanate polyaddition products which are cross-linked via allophanate, biuret, or uretdione imine groups are linearized by reacting them in the presence of polar solvents with low molecular weight polyisocyanates at temperatures between 90.degree. and 200.degree.C and then preferably reacting the linearized product with amino alkyl silane derivatives to prepare products which are easily cross-linked by atmospheric moisture to form soft highly elastic films.

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Inventors: Wagner, Kuno (Leverkusen, DT)

Application Number: 546492
Filing Date: 1975-02-03
Publication_date: 1976-01-20
Assignee: Bayer Aktiengesellschaft (Leverkusen Bayerwerk, DT)
Primary Class(es): 525/440 525/409, 525/410, 525/418, 525/446, 525/455, 525/457, 525/464, 525/467
Other Classes:
US Patent Ref:

3164439	Jan, 1965	Muhlhausen et al.	260/75.
3326861	Jun, 1967	Sandridge	260/77.
3711445	Jan, 1973	Chu et al.	260/77.
3738946	Jun, 1973	Frulla et al.	260/77.

Other Refs: Other References: Gould, Mechanism & Structure In Organic Chemistry, Holt, NY, 1959, pp. 57-60.