摘要:
Disclosed herein is a water-soluble copolymer formed by copolymerizing N-vinylformamide and one or more vinyl C 1 -C 10 alkyl esters, and then hydrolyzing from 30 to 100 mol% of the formyl groups from the copolymerized units to form amino groups and from 30 to 100 mol% of the C 1 -C 10 alkyl ester groups from the copolymerized units to form hydroxyl groups, wherein the copolymer has a unimodal molecular weight distribution as evidenced by essentially one peak in a gel permeation gradient elution chromatographic analysis. A process to produce the polymer is also disclosed.
摘要:
A water soluble film useful in unit-dose chemical packaging is disclosed. The film may include: a water soluble saccharide and a polyvinyl alcohol copolymer consisting essentially of: (a) from 80 to 99 mole percent of vinyl alcohol and vinyl ester monomer; and (b) from 1 to 20 mole percent of a pyrrolidone comonomer. Such compositions may be used to provide a water-soluble film simultaneously satisfying requirements in regard to water solubility, biodegradability, and physical properties, even when used for packaging a broad range of harsh, oxidizing chemicals.
摘要:
A water soluble polyvinyl alcohol copolymer having a diad syndiotacticity of greater than about 60% and less than about 70%. In some embodiments, the water soluble polyvinyl alcohol copolymer is soluble in water at a concentration of at least 1 wt% at a temperature of less than 100°C. In other embodiments, the composition is soluble in water at a concentration of at least 5 wt% at a temperature in the range from about 90°C to less than 100°C. The high solubility of the high syndiotactic poly vinyl alcohols disclosed herein may provide various advantages as described herein, including ease of processing and decreased use of harmful solvents.
摘要:
Disclosed herein is a barrier layer comprising a polyvinyl amine-polyvinyl alcohol copolymer applied to a substrate as a water-soluble composition, wherein the polyvinyl amine- polyvinyl alcohol copolymer is formed by copolymerizing: (a) from 99 to 1 mol% of N-vinylformamide and (b) from 1 to 99 mol% of one or more vinyl Ci-Ci0 alkyl esters, and then hydrolyzing from 30 to 100 mol% of the formyl groups from the copolymerized units (a) to form amino groups and from 30 to 100 mol% of the Cj-Cio alkyl ester groups from the copolymerized units (b) to form hydroxyl groups, wherein the copolymer has a unimodal compositional distribution as evidenced by essentially one peak in a gel permeation gradient elution chromatographic analysis. A method of producing a barrier layer is also disclosed.
摘要:
Epilatory compositions may be formed from: 40 to 80 wt% water; 5 to 30 wt% of a mixture of at least one polyvinyl alcohol and at least one polyvinyl alcohol copolymer; 1 to 15 wt% plasticizer, where the plasticizer is a linear or branched composition having from 3 to 15 wt% OH; and up to 40 wt% of one or more additives. Pore strip, keratonic plug removal, and other cosmetic applications may be formed from a similar composition, where the plasticizer is a linear, cyclic, or branched composition having greater than 25 wt% OH; and up to 40 wt% of one or more additives. The adhesive properties of the formulations may be tailored, where a low OH content may result in increased adhesion relative to plasticizers having a high OH content.
摘要:
Water soluble films and coatings herein address the problem of water insolubility, color formation, and brittleness upon exposure to oxidizing chemicals, including strong or aggressive oxidizing chemicals. The water soluble films or coatings may include a water soluble polymer and a reactive precursor, such as an alkanolamine or an alkyl alkanolamine. The reactive precursor is water soluble and reactive with oxidizing compounds. Water soluble films or coatings herein may also include a water soluble polymer and an additive mixture including an alkanolamine or an alkyl alkanolamine. The films or coatings, upon exposure to an oxidizing chemical for 8 weeks at 40°C and ambient humidity, may dissolve fully or achieve 90% dissolution at times of less than 10 minutes. The water soluble films and coatings may advantageously be used with oxidizing chemicals while maintaining water solubility, acceptable color, and flexibility, such as in unit dose packaging, even over extended exposure periods.
摘要:
Various cosmetic compositions are disclosed that may be useful in face masks, epilatories, and pore strips. Also disclosed is a method of designing a cosmetic composition that may include: receiving a request to tailor a cosmetic composition to have a selected property or a selected property set. The method may be used to design and manufacture cosmetic compositions, such as epilatory compositions, face or skin care mask compositions used for cleansing and/or exfoliating the skin, and eyeliners, among others, having advantageous properties.
摘要:
A water soluble film useful in unit-dose chemical packaging is disclosed. The film may include: a water soluble saccharide and a polyvinyl alcohol copolymer consisting essentially of: (a) from 80 to 99 mole percent of vinyl alcohol and vinyl ester monomer; and (b) from 1 to 20 mole percent of a pyrrolidone comonomer. Such compositions may be used to provide a water-soluble film simultaneously satisfying requirements in regard to water solubility, biodegradability, and physical properties, even when used for packaging of harsh, oxidizing chemicals.
摘要:
Cold water-soluble PVOH/alkyI acrylate copolymers are provided with a substantially random distribution of monomers which is reflected in the polymer's cold water solubility, GPEC chromatograms and may be confirmed by C13 NMR. The product is particularly useful for films used in packaging and for encapsulating particulate products. Encapsulated products which may be provided include fertilizer or other agricultural products, pharmaceutical products, biomedical products and cosmetic products.
摘要:
A hair care product comprising water, a chelating agent, a copolymer, a pH adjusting agent and a hair treatment composition including a polyvinyl alcohol, polyvinyl alcohol copolymer, vinyl acetate emulsion, acrylic emulsion, vinyl acrylic emulsion, vinyl acetate copolymer emulsion or a combination thereof.