Montedison S.p.a.

Ecp Enichem Polimeri S.r.l.

Montedipe S.r.l.

Leonardo Fiore

Giuseppe Motroni

Mauro Maritano

Italo Borghi

Corrado Berti

Maurizio Fiorini

Francesco Pilati

Marco Binaghi

Aldo Cicuta

Andrea Mattiussi

Virna Bonora

Ugo Bonicelli

A process for preparing aromatic polyesters having excellent physico-mechanical and solvent-resistance properties, consisting in reacting at least a dialkyl ester of an aromatic diacid with an aromatic polycarbonate and/or an aromatic dialkyldicarbonate in the presence of an esterification or transesterification catalyst.

Process for preparing aromatic polyesters

The present invention relates to copolyethers comprising copolymers of 7,oxa-bicyclo(2,2,1)heptane, and its alkyl-derivatives, with one or more single-ring or condensed-rings cycloaliphatic ethers, comprising the characteristic group; ##STR1## wherein R' is hydrogen and R' is H, a halogen, or an alkyl radical containing a small number of carbon atoms, and which may also be halogen-substituted. If the ether contains one ring only, it contains from 5 to 12 atoms in the ring, and if it contains a condensed-ring system, it contains a total number of from 10 to 18 atoms in the rings. Those copolyethers show a anisotropic behaviour in the molten state, and therefore have liquid-crystal properties.

Liquid-crystal copolyethers based on 7-oxa-bicyclo(2,2,1)heptane

The present invention relates to copolyethers constituted by copolymers of 7,oxa-bicyclo(2,2,1)heptane, and its alkyl-derivatives, with one or more cycloaliphatic ethers, comprising from 2 to 4 carbon atoms in their ring. These copolyethers show an anisotropic behavior in the molten state, and therefore are endowed with liquid-crystal properties.

Liquid-crystal copolyethers based on 7-oxa-bicyclo-(2,2,1)-heptane

Rapidly-crystallizing polyester compositions comprising a polyester thermoplastic resin and a styrene polymer having an essentially syndiotactic structure.

Rapidly-crystallizing polyester compositions

The present invention relates to copolyethers comprising copolymers of 7,oxa-bicyclo(2,2,1)heptane, and its alkyl-derivatives, with one or more cycloaliphatic ethers, comprising from 2 to 4 carbon atoms in their ring. These copolyethers show an anisotropic behavior in the molten state, and therefore have liquid-crystal properties.

Liquid crystal copolyethers from 7-oxa-bicyclo-(2,2,1)-heptane

Process for the adhesion of para-xylylene vapors to solid substrates by the use of an unsaturated ester of phosphoric acid of the formula: ##STR1## wherein at least one of the radicals R.sub.1, R.sub.2 and R.sub.3 is hydrogen and at least one of said radicals is:

Process for the adhesion of poly-p-xylylene to substrates by means of

The impact-resistance characteristics of styrene/acrylonitrile copolymers (SAN) are improved by the admixture to them of acrylic rubbers consisting of either copolymers or terpolymers of ethyl and/or butyl acrylate with acrylic and/or methacrylic acid, by carrying out said mixing in the presence of from 0.05 to 2% by weight of a halide chosen out from among: ZnCl.sub.2, FeCl.sub.3, AlCl.sub.3, CdCl.sub.2, BF.sub.3.(C.sub.2 H.sub.5).sub.2 O; and of 0.5-5 mols, on 100 mols of acrylic rubber, of an epoxy cross-linking compound, at temperatures comprised between the glass transition temperature of the SAN copolymer and 220.degree. C.

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Milan, Italy

Leonardo Fiore