Merck Patent Gmbh

Merck Patent Gesellschaft MIT Beschrankter Haftung

Peter Pokinskyj

Werner Siol

Wolfgang Ritter

Robert Wenz

The invention describes polyesters containing (meth)acrylate end groups, of the general formula (I) CH &boxH;CRCOO&mdash;PE&mdash;OCOCR&boxH;CH where R&equals;CH or H, where PE&equals;&lsqb;&mdash;A&mdash;OCO&mdash;B&mdash;COO&mdash;&rsqb; &mdash;A&mdash;, &lsqb;&mdash;CHR&prime;&mdash;COO&mdash;&rsqb; &mdash;A&mdash;&lsqb;&mdash;OCOCHR&prime;&mdash;&rsqb; , or combinations thereof, in which A is an alkylidene radical having 2-20 carbon atoms or an alkoxylidene radical having 2-1000, preferably 2-500, alkoxylidene units, B is a saturated alkylidene radical having 2-10 carbon atoms, R&prime; is H or CH , m is 1-100, n is 1-100, and, if both m and n are present, the sum m&plus;n is 2-200, where the polyesters containing (meth)acrylate end groups are characterized in that a) the content of short-chain di(meth)acrylates (II) CH &boxH;CRCOO&mdash;A&mdash;OCOCR&boxH;CH is <5% by weight, b) the content of hydroxyl groups is <0.25 mol/mol of (meth)acrylate, and c) the APHA color number is <200.

Polyesters containing (meth)acrylate end groups

Reactive systems for polymerizing ethylenically unsaturated compounds comprising a first component, comprised of ethylenically unsaturated compounds capable of polymerization, and a second component of a hardener system comprised of organoboron compounds which are stabilized with suitable oligomers. An organic peroxide (perester, hydroperoxide, perether and/or peranhydride)is admixed with the compounds. These components are mixed to form a polymer. The reactive system reaches full strength in reduced time with the use of the organic peroxide and are suitable for joining hard body materials in human or animal tissue, in particular in the surgical and/or dental sector, in the production of body-absorbable or body-resistant adhesives, cements, and/or filling compounds and for forming synthetic material moldings.

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Rossdorf, Germany

Peter Pokinskyj