摘要:
An oral composition and method for use thereof, comprising in an orally acceptable vehicle, an effective antiplaque amount of a noncationic antibacterial agent, and an anionic copolymer formed from monomers of which about 40 to about 90% by weight are hydrophilic type capable of attachment to oral surfaces and about 10 to about 60% by weight are of a hydrophobic type; such oral composition being effective in increasing the uptake of the antibacterial compound to dental tissue so as to enhance the therapeutic efficacy of the administered antibacterial compound.
摘要:
Methods of producing vinyllactam copolymers which include: providing at least one water-soluble N-vinyllactam; providing at least one hydrophobic comonomer; and subjecting the at least one water-soluble N-vinyllactam and the at least one hydrophobic comonomer to free-radical polymerization in an organic solvent in the presence of an initiator, under a combination of process measures selected from the group consisting of A and B; wherein:(A) comprises (i) polymerization under reflux, and at least two of (ii), (iii), (iv), (v), (vi), and (vii), wherein (ii) comprises an addition of at least 5 mol % of N-vinyllactam to the polymerization mixture if at least 70 mol % of the total amount of hydrophobic monomer used have completely reacted, (iii) comprises return of condensate formed in the reflux from below to the polymerization mixture, (iv) comprises introduction of the initiator in the form of a solution in an organic solvent from below into the polymerization mixture, (v) comprises addition of N-vinyllactam to the reflux, (vi) comprises distilling off a portion of the organic solvent and continuing the polymerization following conversion of 70 to 99% by weight of the N-vinyllactam used, and (vii) comprises introduction of at least one monomer from below into the polymerization mixture; and wherein(B) comprises (viii) polymerization under a superatmospheric pressure such that vaporization of the polymerization components is avoided, and at least one of (i), (ii), (iii), (iv), (v), (vi), and (vii), with the proviso that a combination of (viii) with any of (i), (iii) or (v) is carried out sequentially.
摘要:
Method of producing vinyllactam copolymers by free-radical polymerization of at least one water-soluble N-vinyllactam and at least one hydrophobic comonomer in an organic solvent in the presence of an initiator under reflux conditions, where at least 10 mol % of the N-vinyllactam are added to the polymerization mixture when at least 90 mol % of the hydrophobic monomer have completely reacted.
摘要:
Method of producing copolymers by free-radical polymerization of at least one water-soluble N-vinyllactam and at least one hydrophobic comonomer in an organic solvent in the presence of an initiator, where the polymerization is carried out under a gauge pressure such that evaporation of the components is avoided.
摘要:
Disclosed is a method of making packaging material for polymers susceptible to oxidation. The packaging material utilizes a composite foil. The composite foil has at least three layers and have barrier layers based on polyvinyl alcohols. The composite foil may be used to package polymers susceptible to oxidation. Also disclosed is a process for packaging the polymers and the packaging composed of the composite foil.
摘要:
The disclosure is directed to a process of conditioning hair in which a cosmetic composition is applied to the hair, which composition contains a polymer formed by (i) the free-radically initiated copolymerization of monomer mixtures of (a) from 1 to 99.99% by weight of a cationic monomer or quaternizable monomer, (b) from 0 to 98.99% by weight of a water-soluble monomer, (c) from 0 to 50% by weight of a further free-radically copolymerizable monomer, and (d) from 0.01 to 10% by weight of a bifunctional or polyfunctional, free-radical copolymerizable monomer, and (ii) subsequent quaternization of the polymer if the monomer (a) is a non-quaternized monomer.
摘要:
Methods of producing vinyllactam copolymers which include: providing at least one water-soluble N-vinyllactam; providing at least one hydrophobic comonomer; and subjecting the at least one water-soluble N-vinyllactam and the at least one hydrophobic comonomer to free-radical polymerization in an organic solvent in the presence of an initiator, under a combination of process measures selected from the group consisting of A and B; wherein: (A) comprises (i) polymerization under reflux, and at least two of (ii), (iii), (iv), (v), (vi), and (vii), wherein (ii) comprises an addition of at least 5 mol % of N-vinyllactam to the polymerization mixture if at least 70 mol % of the total amount of hydrophobic monomer used have completely reacted, (iii) comprises return of condensate formed in the reflux from below to the polymerization mixture, (iv) comprises introduction of the initiator in the form of a solution in an organic solvent from below into the polymerization mixture, (v) comprises addition of N-vinyllactam to the reflux, (vi) comprises distilling off a portion of the organic solvent and continuing the polymerization following conversion of 70 to 99% by weight of the N-vinyllactam used, and (vii) comprises introduction of at least one monomer from below into the polymerization mixture; and wherein (B) comprises (viii) polymerization under a superatmospheric pressure such that vaporization of the polymerization components is avoided, and at least one of (i), (ii), (iii), (iv), (v), (vi), and (vii), with the proviso that a combination of (viii) with any of (i), (iii) or (v) is carried out sequentially.
摘要:
The present invention relates to the use of specific amphiphilic copolymers as synergistic adjuvant for agrotechnical applications. Suitable agrotechnical compositions are also described. Thus, the addition of such copolymers makes possible an accelerated uptake of active ingredients by the plant. The copolymers or salts thereof to be used comprise monomer units (i) based on at least one olefin and/or at least one vinyl ether, (ii) based on at least one ethylenically unsaturated dicarboxylic acid and/or at least one ethylenically unsaturated dicarboxylic acid derivative, and, optionally (iii) based on at least one further copolymerizable comonomer.
摘要:
Cationic polymers obtainable by free-radically initiated copolymerization of (a) from 60 to 99% by weight, based on the overall amount of all monomers, of a substituted or unsubstituted and quaternized or nonquaternized 1-vinylimidazole, (b) from 1 to 40% by weight of an acid which contains a polymerizable double bond, or of salts of such an acid, and (c) from 0 to 30% by weight of a further free-radically copolymerizable monomer, percentages by weight being based in each case on the overall amount of all monomers, and quaternization of the polymer if a nonquaternized 1-vinylimidazole was employed as monomer a) are used as active ingredients in cosmetic hair formulations such as shampoos.
摘要:
Adhesives for dental prostheses, comprisinga) as active adhesive ingredient partially or completely neutralized copolymers offrom 5 to 95% by weight, based on the copolymer, of one or more acrylic esters of the formula ICH.sub.2 .dbd.CR'--COOR I (monomer A),where R' is hydrogen or methyl and R is alkyl of 1 to 30 C atoms, andfrom 95 to 5% by weight of methacrylic and/or acrylic acid (monomer B), andb) a vehicle which is customary in adhesives for dental prostheses.