Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1990-12-27
1994-02-01
Dean, Ralph H.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525446, C08F28302
Patent
active
052832961
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to modified polymers based on water-dispersible sulphonated polyester grafted with copolymer units derived from vinyl monomers and an ethylenically unsaturated organopolysiloxane, the process for the preparation of the said modified polymers and their use in the preparation of anti-adhesive coatings.
According to the invention, the modified polymers are based on a graft polyester comprising:
a backbone derived from a water-dispersible sulphonated polyester
and grafts consisting of copolymer units derived from at least one vinyl monomer and at least one ethylenically unsaturated organopolysiloxane soluble in the said vinyl monomer or monomers.
The water-dispersible sulphonated polyesters which can make up the backbone are known products. They can be prepared by a co-condensation reaction of an organic diacid (such as a saturated or unsaturated aliphatic diacid, an aromatic diacid, a diacid containing several aromatic rings or an arylaliphatic diacid), one of its diesters or its anhydride and a sulphonated organic diacid or one of its diesters with a diol, in the presence of a catalyst customary for polyesterification, such as tetraisopropyl orthotitanate.
The following may be mentioned as starting monomers currently used for the preparation of water-dispersible sulphonated polyesters:
as organic diacids: saturated or unsaturated aliphatic diacids, aromatic diacids, such as succinic, adipic, suberic and sebacic acids, maleic, fumaric and itaconic acids, orthophthalic, isophthalic and terephthalic acids, the anhydrides of these acids and their diesters, such as the methyl, ethyl, propyl and butyl diesters. The preferred compounds are adipic acid and orthophthalic, isophthalic and terephthalic acids;
as sulphonated organic diacids: sodium diacidsulphonates or their diesters, such as the dialkylisophthalates and dialkylsulphosuccinates, such as sodium 5-dimethylisophthalate-sulphonate or sodium dimethylsulphosuccinate;
as diols: aliphatic glycols, such as ethylene glycol, diethylene glycol and dipropylene glycol and the higher homologues, butane-1,4-diol, hexane-1,6-diol, neopentyl glycol and cycloalkane glycols, such as cyclohexanediol and dicyclohexanediolpropane. The diols chosen preferentially are ethylene glycol and diethylene glycol.
The preferred water-dispersible sulphonated polyesters are those which have a number-average molecular mass of between 10,000 and 35,000, an acid number of less than 5 mg of KOH/G and a proportion of sulphur of between 0.8 and 2% by weight, preferably between 1.2 and 1.8%.
Amongst the vinyl monomers from which the copolymer units making up the grafts can be derived, the following may be mentioned:
the monoethylenically unsaturated esters of carboxylic acids (vinyl acetate, propionate, butyrate, stearate, benzoate . . . )
the saturated esters and amides of monoethylenically unsaturated carboxylic acids (C.sub.1 -C.sub.20 -alkyl acrylates or methacrylates, such as methyl, heptyl, propyl, heptadecanyl . . . acrylates and methacrylates, acrylamide, methacrylamide . . . )
the monoethylenically unsaturated nitriles (acrylonitrile, methacrylonitrile . . . )
the monoethylenically unsaturated carboxylic acids (acrylic acid, methacrylic acid, itaconic acid, maleic acid . . . )
the hydroxyalkyl or aminoalkyl esters of monoethylenically unsaturated carboxylic acids (hydroxyethyl acrylate, hydroxypropyl acrylate . . . , 2-aminoethyl methacrylate . . . )
the vinyl-aromatic monomers (styrene, vinyltoluene . . . )
Small amounts (0 to 5%, preferably 0 to 3%, relative to the vinyl monomer or monomers) of crosslinking monomers (divinylbenzene, diallyl phthalate, ethylene glycol diacrylate, methylene-bismethacrylamide, N-methylolacrylamide . . . ) can also be present.
The ethylenically unsaturated organopolysiloxanes from which the copolymer units making up the grafts are derived can be represented by the following average formula:
the symbols R are identical or different and represent a C.sub.1 -C.sub.4 -alkyl radical, phenyl or 3,3,3-trifluoropropyl
the symbols R'
REFERENCES:
patent: 3075941 (1963-01-01), Wynstra
patent: 4119680 (1978-10-01), Vachon
Canivenc Edith
Fiard Jean-Francois
Fleury Etienne
Dean Ralph H.
Rhone-Poulenc Chimie
LandOfFree
Modified polymers based on graft polyester and their preparation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Modified polymers based on graft polyester and their preparation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modified polymers based on graft polyester and their preparation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-580286