Montedison S.p.a.

Atohaas Holding, C.v.

Atofina

Elf Atochem Italia S.r.l.

Vedril S.p.a.

Elf Atomchem Italia S.r.l.

Franco Marciandi

Christian Collette

Massimo Cesana

Marco Binaghi

Marco Rigamonti

Pasquale Relvini

Jean-Michel Paul

Marco Bertani

Ferruccio Berte'

Dario Giudici

The invention concerns a method for preparing water-soluble acrylic copolymers comprising the following steps: (i) preparing at least a monomer (1) of formula (I) wherein Ao is a &#x2014;(RtO)Rz or &#x2014;NRp (RtO)Rz group, by reacting a (meth)acrylic anhydride derivative (1') of formula (II) with a compound of formula AoH, Ao being as defined above; (ii) copolymerizing said monomer (1) with at least a monomer (2) of (meth)acrylic acid or of a derivative of said acid. The invention also concerns novel water-soluble acrylic copolymers and their use as superplasticizers or dispersants for hydraulic binders such as cements.

Method for preparing water-soluble acrylic copolymers

Acrylic copolymers containing the following repeating units: ##STR1## wherein R.sub.A, R.sub.B, R.sub.C, R.sub.I, R.sub.II, equal or different, are H or CH.sub.3 ; M.sup.+ is H or a cation belonging to group IA, IIA, or ammonium; n is an integer from 0 to 2; A.sub.0 is --COO--(R.sub.T O).sub.m --R.sub.Z wherein R.sub.T is a saturated C.sub.2 -C.sub.4 alkyl group, m is an integer from 7 to 50, R.sub.Z is H or a saturated C.sub.1 -C.sub.4 alkyl group; R.sub.III is H, COOH, COO.sup.- M.sup.+ wherein M.sup.+ is as above defined or A.sub.0 as above defined; and optionally containing a third comonomer in a quantity 0-20% of the total monomer weight, said polymers, that contain in terminal position silanol groups, are obtainable by copolymerizing the monomers in the presence of the following chain transfer agents:

Hydrosoluble acrylic copolymers

Molding process of articles having color contrast areas on the surface comprising the coating of the surface or of part of the surface of the mold with a colored composition polymerized before filling the mold with a polymerizable fluid composition wherein the colored composition is a fluid, stable and redispersable dispersion, comprising:

Process for preparing color contrasts on articles obtained by molding

The invention concerns films or plates of acrylic polymers, in particular polymethylmethacrylate, that have no drop properties. The films or plates are coated with a monomeric composition, polymerized and reticulated by ultraviolet light, consisting of:

No drop films or plates consisting of acrylic polymers and process for

The present invention relates to a process for preparing flowable, stable and hardenable compositions, comprising mixing:

Process for preparing flowable, stable and hardenable suspensions, and

The invention concerns films or plates of acrylic polymers, in particular polymethylmethacrylate, rendered no drop by coating with a monomeric composition, polymerized and reticulated by ultraviolet light, consisting of:

Water spreading films or plates consisting of acrylic polymers and

Polymeric compositions endowed with high flame self-extinguishing properties, comprising a polymer selected from amongst olefinic polymers, polystyrene, polybutylene terephthalate, SAN and ABS copolymers, and also, for 100 parts of composition:

Flameproof polymeric compositions containing acid piperazine

Polymeric compositions possessing an improved resistance to combustion, said compositions consisting of a polyolefin and, for every 100 parts by weight of total composition:

Self-extinguishing polyolefinic compositions

This invention relates to self-extinguishing polymeric compositions, comprising a thermoplastic polymer, preferably a polyolefin, and an anti-flame additive consisting of:

Self-extinguishing polymeric compositions

Self-extinguishing polymeric compositions, including a thermoplastic polymer and a flameproof additive whose essential components are:

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Milan, Italy

Franco Marciandi