Lamberti Spa

I.s.f. Societa Per Azioni

Other

Isf LLC

Societe I.s.f. S.p.a.

Ugo C Pfeiffer

Mario Pinza

Giuseppe Li Bassi

Carlo Farina

Silvano Banfi

Giovanni Floridi

Valentina Langella

Mauro Tenconi

Giuseppe Molteni

Cristina Rinaldi

Annie Audibert

Jean-Fran&ccedil;ois Argillier

Andrea Balestrini

Barbara Biasotti

Eva Baldaro

Giampietro Margheritis

Laura Vigano

Enrico Sironi

Guiseppe Molteni

Max Giudici

Morano Gatto

Compositions comprising a hydraulic binder such as cement or gypsum and a hydroxypropyl guar derivative that comprises unsubstituted linear or branched C-Calkyl chains possess excellent water retention characteristics.

Hydraulic binder composition

A glyoxal and boron free purified cationic polygalactomannan may be prepared by reacting a polygalactomannan flour, a nonionically derivatized polygalactomannan flour, or a mixture thereof, with a cationising reagent, adjusting the pH to be from about 4 to about 6; cross-linking the cationic with glyoxal, and filtering and water washing the cationic polygalactomannan to produce a glyoxalated purified cationic polygalactomannan containing not more than 70% by weight of water. In some cases it may be desirable to introduce a buffering agent to the glyoxalated purified cationic polygalactomannan to regulate the pH to from 8.0 to about 9.5, when measured at 1% (dry matter) in water. In other cases, it may be desirable to remove water to produce glyoxal free purified cationic polygalactomannan in powder form. Such compounds are particularly useful in personal care products.

Glyoxal free purified cationic polygalactomannan

The present invention relates to hydrophobically modified hydroxyalkyl guar derivatives which dissolve rapidly in water, having a hydroxyalkyl molar substitution between 0.2 and 2.5 and containing hydrophobic groups comprising C10-C32 alkyl chains, to the procedure for their preparation and to their use in the formulation of well fluids.

Fast dissolving hydroxyalkyl guar derivatives

The present invention relates to highly hydroxyalkylated, glyoxal crosslinked, purified hydroxyalkyl guar useful as additive in the building industry, and to a method for its preparation.

Building additives based on purified hydroxyalkyl guar

The present invention relates to highly hydroxyalkylated, glyoxal crosslinked, purified hydrophobically modified hydroxyalkyl guar useful as additive in the building industry, and to a method for its preparation.

Building additives based on purified hydrophobically modified hydroxyalkyl guar

Disclosed are cementitious mortar additives comprising a hydroxyalkyl guar derivative having a molar substitution of from about 0.7 to about 3. Also disclosed are dry cementitious mortar compositions including from 0.1 to 1.5% by weight of the additive and cured cementitious mortars obtained by addition of water to the dry cementitious mortar compositions.

Additives based on hydroxyalkyl guar derivatives for use in mortars and mortars including them

For controlling filtration loss during the installation of climber cement in a well, the procedure entails the addition of a specific quantity of at least one derivative of galactomannan, hydrophilically and hydrophobically modified, a hydrophobically modified hydroxy propyl guar (HMHPG).

Well cementing method using HMHPG filtrate reducer

The invention relates to 4-hydroxy pyrrolidone derivatives which help restore learning and memory difficulties associated with ageing. A compound of the invention is 2-(4-hydroxy-2-oxo-1-pyrrolidineacetamido)acetamide.

A process for making pyrrolidone derivatives

Pyrrolidone derivatives and memory enhancement use thereof

Process for preparing pyrrolidinone derivatives of (1) ##STR1## in which R is hydrogen, alkyl or acyl characterized in that a compound of (2) ##STR2## wherein R.sup.1 is hydrogen and R.sup.2 is benzyl or substituted benzyl, or R.sup.1 and R.sup.2 can together form a group ##STR3## where R.sup.4 and R.sup.5 are independently hydrogen, alkyl, phenyl or optionally substituted aryl or together are 1,4-butylene or 1,5-pentylene; R.sup.3 is hydrogen or straight or branched alkyl of 1 to 4 carbon atoms; and X is alkyl subjected to N-deprotection and the deprotected intermediate is cyclized intramolecularly. The deprotected intermediates can be isolated as acid-addition salts.

Process for the preparation of pyrrolidone derivatives

A process for preparing compounds (1) ##STR1## where Y is NR.sup.1 R.sup.2 or OR, R.sup.1 and R.sup.2 are hydrogen or C.sub.1-3 alkyl, and R is C.sub.1-3 alkyl, which comprises protecting the hydroxy group of a compound (2) ##STR2## cyclizing the product under basic conditions and removing the protecting group.

Substituted butanamido acetate compounds for the preparation of

The invention relates to 5-oxo-1-imidazolidineacetamide derivatives which help restore learning and memory difficulties associated with ageing. A compound of the invention is 2,2-dimethyl-5-oxo-1-imidazolidineacetamide.

Pharmacologically active 5-oxo-1-imidazolidine acetamide compounds

The invention relates to 4-imidazolidinone derivatives which help restore learning and memory difficulties associated with ageing. A compound of the invention is 1-(2-aminoacetyl)-2,2-dimethyl-4-imidazolidinone, of the formula: ##STR1##

Nootropic imidazolidinones

A process for preparing compounds (1) ##STR1## where Y is NR.sup.1 R.sup.2 or OR, R.sup.1 and R.sup.2 are hydrogen or C.sub.1-3 alkyl, and R is C.sub.1-3 alkyl, which comprises protecting the hydroxy group of a compound (2) ##STR2## cyclising the product under basic conditions and removing the protecting group.

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Milan, Italy

Ugo C Pfeiffer