Rhone-poulenc Sante

Paul Bourrain

Pierre Autant

Andre Cartillier

Pierre Ardaillon

Gerard Collas

Francois Sagi

Jean-Francois Rostaing

Granules containing feed additives for ruminants are coated with an enzymatically degradable composition, consisting of: zein in combination with a non-water-soluble polymer and optionally a plasticizing agent, or zein in combination with a hydrophobic substance and optionally a non-water-soluble polymer.

Granules for feeding ruminants with an enzymatically degradable coating

A basic copolymer of styrene with vinylpyridine is purified by extraction with supercritical carbon dioxide to remove residual monomers.

Process for purifying styrene/vinylpyridine copolymer using

A composition for coating a biologically active substance, which is stable in a medium with a pH greater than or equal to 5 and which enables the active substance to be released in a medium with a pH less than or equal to 3.5, consisting of a basic amino copolymer (preferably vinyl-pyridine/styrene copolymer) and a hydrophobic substance with a melting point greater than 60.degree. C. (preferably stearic acid), the hydrophobic substance content being between 50 and 90% of the total mass of the coating, and granules comprising a nucleous containing the biologically active substance, coated with this composition.

Compositions for coating feedstuff additives for ruminants and feedstuff

Composition for feeding ruminants, containing a water-soluble biologically active substance which is stable in a medium whose pH is greater than or equal to 5 and which permits the release of the active substance in a medium whose pH is less than 3.5, comprising:

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Dardilly, France

Paul Bourrain