Title: Impression materials for dentistry

Abstract: The invention provides impression materials for use in dentistry comprising the reaction product of (a) a diisocyanate or triisocyanate, (b) a dihydroxy compound having a molecular weight of from 300 to 10,000 and (c) an unsaturated monohydroxy compound. The invention also includes processes for preparing said impression materials.

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Inventors: Walkowiak, Michael (Cologne, DE, US)
Schulz, Hans-Hermann (Leichlingen, DE, US)
Rosenkranz, Hans J. (Krefeld, DE, US)

Application Number: 904071
Filing Date: 1978-05-08
Publication_date: 1980-01-08
Assignee: Bayer Aktiengesellschaft (Leverkusen, DE)
Primary Class(es): 528/75 523/109, 524/590, 525/123, 528/50, 528/52, 528/58
Other Classes:
US Patent Ref:

3297745	Jan, 1967	Fekete et al.	260/471.
3509234	Apr, 1970	Burlant et al.	260/859.
3553174	Jan, 1971	Hausslein et al.	260/77.
3641199	Feb, 1972	Niederhauser et al.	260/859.
3644569	Feb, 1972	Pietsch et al.	260/835.
3709866	Jan, 1973	Waller	260/27.
3825518	Jul, 1974	Foster et al.	260/DIG.
3862920	Jan, 1975	Foster et al.	260/DIG.
3878036	Apr, 1975	Chang	428/424.
3907751	Sep, 1975	Knight et al.	528/75.

Other Refs:
Primary Examiner: Cockeram, H. S.
Assistant Examiner:
Attorney: Sprung, Felfe, Horn, Lynch & Kramer