Thermoplastic polyglutarimide compositions and methods of making them.

摘要

Compositions having high impact strength are achieved by blending polyglutarimide, multiple stage polymer based on butadiene or alkylacrylates, and polycarbonate in a weight ratio such that the polycarbonate comprises about 12 to 25 % of the blend. The polyglutarimide contains imide units of the formula
<Chemistry id="chema01" num="0001"><Image id="ia01" he="18" wi="36" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein R<Sub>1</Sub>, R<Sub>2</Sub>, and R<Sub>3</Sub> independently represent hydrogen or C<Sub>1</Sub> to C<Sub>20</Sub> unsubstituted or substituted alkyl, aryl, or mixtures thereof. The multiple stage polymer has a first stage polymerized from a predominantly butadiene or alkyl acrylate monomer system. Preferably the polyglutarimide is 20 to 80 % by weight of the three components. Blending may be for example by melting together or by dry blending.