1947 results about "Vinyl ester" patented technology

The present invention is directed membrane active poly(vinyl ester) polymers and compositions for targeted delivery of RNA interference (RNAi) polynucleotides to cells in vivo. RNAi polynucleotides are conjugated to the poly(vinyl ester) polymers and the polymers are reversibly modified to enable in vivo targeted delivery. Membrane activity of the poly(vinyl ester) provides for movement of the RNAi polynucleotides from outside the cell to inside the cell. Reversible modification provides physiological responsiveness.

A bipolar separator plate for fuel cells consists of a molded mixture of a vinyl ester resin and graphite powder. The plate serves as a current collector and may contain fluid flow fields for the distribution of reactant gases. The material is inexpensive, electrically conductive, lightweight, strong, corrosion resistant, easily mass produced, and relatively impermeable to hydrogen gas. The addition of certain fiber reinforcements and other additives can improve the properties of the composite material without significantly increasing its overall cost.

A flame retardant composition comprising(A) about 50 to about 95 percent by weight of at least one ethylene co-polymer selected from an ethylene/vinyl ester copolymer; ethylene/alpha, beta unsaturated carboxylate copolymer; and very low density ethylene/alpha-olefin copolymer; and(B) about 5 to about 50 percent by weight of an ethylene/alpha-olefin copolymer having been prepared with a single site catalyst, and, for each 100 parts by weight of component (A) and component (B) combined,(C) about 2 to about 50 parts by weight of a polyethylene modified with a functional group containing compound;(D) about 5 to about 250 parts by weight of a metal hydrate;(E) about 1 to about 12 parts by weight of a triazine ring containing compound; and(F) about 0.5 to about 5 parts by weight of a flame retardant compound selected from the group consisting of a boron compound, a molybdenum compound, and a silicone.

Toughened polyoxymethylene-poly(lactic acid) resin compositions comprising polyoxymethylene, poly(lactic acid), and an impact modifier comprising an ethylene copolymer impact modifier made from monomers (a) ethylene; (b) one or more olefins of the formula CH₂═C(R¹)CO₂R², where R¹ is hydrogen or an alkyl group with 2-8 carbon atoms and R² is an alkyl group with 1-8 carbon atoms, such as methyl, ethyl, or butyl; and (c) one or more olefins of the formula CH₂═C(R³)CO₂R⁴, where R³ is hydrogen or an alkyl group with 1-6 carbon atoms, such as methyl, and R⁴ is glycidyl. The ethylene copolymer impact modifier may further be made from carbon monoxide monomers. The compositions may further comprise one or more ethylene/acrylate and/or ethylene/vinyl ester polymers, ionomers, and cationic grafting agents.

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.

A method for the regiospecific synthesis of rapamycin 42-ester derivatives is described. The method involves lipase-catalyzed acetylation of 42-hydroxy of rapamycin with an acyl donor such as a vinyl ester, an isopropenyl ester or an anhydride in a suitable organic solvent.

An object of the invention is to provide a pressure-sensitive adhesive sheet. Provided is an acrylic polymer for use in a pressure-sensitive adhesive composition for a touch screen panel, the acrylic polymer being obtained by copolymerizing monomer components comprising (a) a (meth)acrylic acid ester monomer having a C_1-12 hydrocarbon group, (b) a hydroxy group-containing (meth)acrylic acid ester monomer, (c) an amide group-containing monomer, and (d) a vinyl ester monomer. The acrylic polymer has an acid value of 0.1 mg KOH/g or less, a weight-average molecular weight of 400,000 to 2,000,000, a Tg of −80 to 0° C., and a permittivity of 3 to 6.

The invention discloses metal base material corrosion-resistant coating and a preparation method thereof. The metal base material corrosion-resistant coating comprises the following components in parts by weight: 25 to 30 pats of epoxy modified organic silicon resin, 15 to 20 parts of modified vinyl resin, 1 to 2 parts of nano material, 1 to 3 parts of corrosion-resistant particulate filler, 15 to 18.5 percent of pigment and filler, 1 to 2 parts of antisettling agent, 0.3 to 0.5 part of dispersing agent, 0.5 to 0.8 part of stabilizing agent, 3 to 4 parts of aid and 23 to 26 parts of solvent, wherein the modified vinyl resin comprises according to the weight percentage 50 to 70 % of phenolic aldehyde epoxy vinyl ester resin and 30 to 50 % of flexible vinyl ester resin. The metal base material corrosion-resistant coating is prepared by multiple flows of weighing the raw materials in parts by weight, mixing the raw materials according to certain sequence, dispersing, grinding and the like. The metal base material corrosion-resistant coating has high temperature tolerance, wet resistance, corrosion resistance, weldability and constructability and can be applied in the technical fieldsof processing of various different metals.

A laundry detergent composition comprising a graft copolymer of polyethylene, polypropylene or polybutylene oxide with vinyl acetate in a weight ratio of from about 1:0.2 to about 1:10; from about 0.2% to about 8% of organic solvent; and from about 2% to about 20% of a surfactant system; wherein said detergent composition is in a form selected from: liquid; gel; and combinations thereof.

The present invention relates to a polymerization-curable composition for the preparation of biodegradable, biocompatible, cross-linked polymers on the basis of polyvinyl alcohol comprising: 5 to 100% by weight of (a) vinyl ester monomer(s) of one of the general formulas (I) to (III):

wherein X is oxygen, sulfur, nitrogen, or phosphorus; n is 1 to 1000, at least 20% of the n being ≧2; the R¹ are selected from hydrogen; straight, branched or cyclic, saturated or unsaturated, n-valent hydrocarbon groups having 1 to 30 carbon atoms, which optionally have heteroatoms and are optionally substituted with one or more substituents selected from —OH, —COON, —CN, —CHO, and ═O, and n-valent radicals of biodegradable, biocompatible oligomers and polymers; m is an integer from 1 to 5; the R² are selected from hydrogen, —OH, ═O, and the options listed for R¹; and the R³ are selected from hydrogen, —OH, and the options listed for R¹; 0 to 50% by weight of ethylenically unsaturated co-monomers; 0 to 10% by weight of (a) polymerization initiator(s); and 0 to 95% by weight of solvent(s).

A polymerizable polymeric photoinitiator according to Formula (I):

wherein:

• • PL represents an n+m+p-functional polymeric core;
  • n and m independently represent an integer from 1 to 30;
  • p represents an integer from 0 to 10;
  • o is 0 or 1;
  • INI represents a group selected from the group consisting of a benzophenone, a thioxanthone, a carbazole, a anthraquinone, a camphor quinone, an α-hydroxyalkylphenone, an α-aminoalkylphenone, an acylphosphine oxide, a bisacyl phosphine oxide, an acylphosphine sulfide, a phenyl glyoxalate, a benzoin ether, a benzyl ketal, an α-dialkoxyacetophenone, a carbazolyl-O-acyl-oxime, an α-haloarylketone and an α-haloaryl sulfone;
  • L₃ and L₄ represent a substituted or unsubstituted divalent linking group comprising 1 to 14 carbon atoms;
  • A represents a radically polymerizable functional group selected from the group consisting of an acrylate, a methacrylate, a styrene, an acryl amide, a methacryl amide, a maleate, a fumarate, an itaconate, an vinyl ether, an allyl ether, an allyl ester, a maleimide, a vinyl nitrile and a vinyl ester; and
  • R4 represents a substituted or unsubstituted alkyl group.

Radiation curable compositions containing the polymerizable polymeric photoinitiator and methods for preparing the polymerizable polymeric photoinitiator are also disclosed.

Adhesive composition for bonding and filling large assemblies, including a mixture of about 5 percent to about 75 percent by weight of a thermoplastic polymer, about 0.5 percent to about 35 percent by weight of a polyester resin or vinyl ester resin, and about 20 percent to about 80 percent by weight of an alkyl acrylate or methacrylate monomer.

A pressure-sensitive adhesive polymer comprising a reaction product of a C₁ to C₂₀ alkyl (meth)acrylate, an ethylenically unsaturated carboxylic acid, a C₂ to C₈ hydroxyalkyl (meth)acrylate, a vinyl aromatic, optionally a ethylenically unsaturated monomer containing sulfonic acid, and optionally a vinyl ester of a carboxylic acid. The pressure-sensitive adhesive polymer can provide adhesion and cohesion in a temperature range from −30° C. to 50° C. for the All-temperature pressure-sensitive adhesive market.

A composite bipolar plate of polymer electrolyte membrane fuel cells (PEMFC) is prepared as follows: a) preparing a bulk molding compound (BMC) material containing a vinyl ester resin and a graphite powder, the graphite powder content of BMC material ranging from 60 wt % to 80 wt %, based on the compounded mixture; b) molding the BMC material from step a) to form a bipolar plate having a desired shape at 80-200° C. and 500-4000 psi, wherein the graphite powder is of 40 mesh-80 mesh.

The use is described of polymers which contain, in copolymerized form, an α-olefin, a vinyl ester and an ester of an α,β-unsaturated carboxylic acid as an additive for fuel oils and lubricants and in particular as a cold flow improver in fuel oils. In addition, the fuel oils and lubricants additized with these polymers; and also additive packages comprising such polymers are described.

Disclosed are oriented films comprising toughened poly(hydroxy-alkanoic acid) resin compositions comprising poly(hydroxyalkanoic acid) and an impact modifier comprising an ethylene copolymer made from monomers (a) ethylene; (b) one or more olefins of the formula CH₂═C(R³)CO₂R⁴, where R³ is hydrogen or an alkyl group with 1-6 carbon atoms, such as methyl, and R⁴ is glycidyl; and optionally (c) one or more olefins of the formula CH₂═C(R¹)CO₂R², where R¹ is hydrogen or an alkyl group with 2-8 carbon atoms and R² is an alkyl group with 1-8 carbon atoms, such as methyl, ethyl, or butyl. The ethylene copolymer may further be made from carbon monoxide monomers. The compositions may further comprise one or more ethylene/acrylate and/or ethylene/vinyl ester polymers, ionomers, and cationic grafting agents. Also disclosed are packaging materials and containers comprising the oriented films.

A heat tolerant, pressure resistant elastomeric composition comprising a blend of a first ethylene-vinyl ester copolymer and a second copolymer selected from the group consisting of chlorosulfonated polyethylene (CSM), chlorinated polyethylene (CPE), polychloroprene (CR), ethylene-acrylic elastomer (AEM), alkyl-acrylate copolymer (ACM), polyvinyl acetate (PVA), nitrile-butadiene rubber (NBR), hydrogenated nitrile-butadiene rubber (HNBR), and mixtures thereof, a hose manufactured therefrom; and a method for preparing the hose are described.

Toughened poly(lactic acid) resin compositions comprising poly(lactic acid) and an impact modifier comprising an ethylene copolymer made from monomers (a) ethylene; (b) one or more olefins of the formula CH₂═C(R¹)CO₂R², where R¹ is hydrogen or an alkyl group with 2-8 carbon atoms and R² is an alkyl group with 1-8 carbon atoms, such as methyl, ethyl, or butyl; and (c) one or more olefins of the formula CH₂═C(R³)CO₂R⁴, where R³ is hydrogen or an alkyl group with 1-6 carbon atoms, such as methyl, and R⁴ is glycidyl. The ethylene copolymer may further be made from carbon monoxide monomers. The compositions may further comprise one or more ethylene/acrylate and/or ethylene/vinyl ester polymers, ionomers, and cationic grafting agents.

The invention discloses an organosilicon modified tert-fluoro emulsion and a preparation method of a luminescent coating which takes the emulsion as a base material. The emulsion takes vinyl ester of tertary carboxylic acid, an organosilicon monomer, an organic fluorine monomer and an acrylic monomer to perform graft copolymerization, the prepared emulsion takes water as a solvent, does not contain organic solvent and is an environment-friendly product, and emulsion particles are of a core-shell structure. The production method of the luminescent coating comprises the following steps: mixing and blending the emulsion with super-efficiency afterglow luminescent powder and other coating additives, the prepared luminescent coating has corrosion prevention and self-cleaning functions, and can be applied to the fields such as building decoration, advertisement signs, factory instruments, airfield runways, road rails, handicraft articles and the like. The coating has the advantages of excellent cost performance ratio, convenient production and construction and easy implementation and popularization.