Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1998-07-01
2000-05-02
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525383, 525385, C08F22222
Patent
active
060574046
DESCRIPTION:
BRIEF SUMMARY
The invention relates to polymers containing .beta.-hydroxyalkylvinyl-amine units, which are obtainable by reacting polymers containing vinylamine units with epoxides, a process for their preparation and their use as retention and drainage aids and flocculents and as fixatives in papermaking, as protective colloid for producing alkyldiketene dispersions, as emulsifier for producing aqueous filler suspensions and as corrosion inhibitor.
U.S. Pat. No. 4,217,214 discloses the preparation of polyvinylamine hydrochloride and its use as flocculent for w ater-suspended particles and for treating wastewaters and sludges.
EP-A-071 050 discloses partially hydrolyzed polymers of N-vinylformamide. They contain from 90 to 10 mol % of vinylamine units and from 10 to 90 mol % of N-vinylformamide units. They are prepared by free-radical polymerization of N-vinylformamide and partial hydrolysis of the polymers in the presence of acids or bases. The polymers are used as retention and drainage aids and flocculents in papermaking and in the treatment of wastewaters and sludges.
EP-A-02 16 387 discloses means for increasing the dry strength of paper. These are water-soluble copolymers which contain vinylamine units and are obtainable by copolymerizing N-vinylformamide with monoethylenically unsaturated monomers selected from the group consisting of vinyl acetate, vinyl propionate, C.sub.1 -C.sub.4 -alkyl vinyl ethers, the esters, nitrites and amides of acrylic acid and methacrylic acid and N-vinylpyrrolidone and elimination of formyl from the copolymers. Preferably, copolymers of N-vinylformamide and vinyl acetate whose monomer units are each 30 to 100 mol % hydrolyzed are used in papermaking.
The preparation of modified polyvinylamines is also disclosed in the literature. Thus, for example, the water solubility of polyvinylamines is improved by grafting ethylene oxide or propylene oxide onto polyvinylamine, cf. Ikemura, Kobunshi Kagaku, 26 (288), (1969) 306-310.
U.S. Pat. No. 5,324,787 discloses modified polyvinylamines, which are obtainable by reacting at least 0.1 mol % of the amine units of polyvinylamine with a glycidyl ether compound. In the reaction, polyvinylamines made hydrophobic are obtained which are used as retention aids in papermaking.
The reaction of polyalkylenepolyamines and monoepoxides or polyepoxides for preparing water-dispersible reactive resins which contain epoxide groups and are used in coating materials is disclosed by U.S. Pat. No. 5,246,984 and U.S. Pat. No. 5,350,784.
It is an object of the present invention to provide novel substances.
We have found that this object is achieved according to the invention by polymers containing .beta.-hydroxyalkylvinylamine units, which are obtainable by reacting polymers-containing vinylamine units with epoxides of the formula ##STR2## where R=C.sub.2 -C.sub.28 -alkyl, phenyl, C.sub.1 -C.sub.18 -alkylphenyl or C.sub.2 -C.sub.18 -alkenyl.
The present invention further relates to a process for preparing the above-described polymers containing .beta.-hydroxyalkylvinylamine units, which comprises, reacting at least 0.1 mol % of the NH groups of polymers containing vinylamine units with epoxides of the formula ##STR3## where R=C.sub.2 -C.sub.28 -alkyl, phenyl, C.sub.1 -C.sub.18 -alkylphenyl or C.sub.2 -C.sub.18 -alkenyl at above 70.degree. C. The reaction is preferably carried out in aqueous solution at pH 8-13.
The above-described polymers containing .beta.-hydroxyalkylvinylamine units are used as retention and drainage aids and flocculants and as fixatives in papermaking, as protective colloid for producing alkyldiketene dispersions or alkenylsuccinic anhydride dispersions, as emulsifier for producing aqueous filler suspensions and as corrosion inhibitor.
Polymers containing vinylamine units are disclosed, cf. for example U.S. Pat. No. 4,217,214, EP-A-0 071 050 and EP-A-0 216 387. These polymers are obtainable by copolymerizing open-chain N-vinylcarboxamides alone or together with other monoethylenically unsaturated monomers and then eliminating the formyl or alkylc
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Ikemura, Kobunshi Kagaku, 26 (288), (1969) 306-310.
Monch Dietmar
Niessner Manfred
Rubenacker Martin
Utecht Jens
BASF - Aktiengesellschaft
Marquis Melvyn I.
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