137 results about "Vinylidine chloride" patented technology

The present invention discloses one kind of multilayer high blocking film for packing liquid material, the multilayer high blocking film includes polyethylene-based heat sealing layer(s), blocking polymer layer(s) preferably of ethylene-vinyl alcohol copolymer, PVA or polyvinylidene dichloride; and protecting layer(s) of polypropylene, polyester, etc. It has the total thickness below 80 micron, preferably of 55-65 micron. The present invention discloses also the making process of the multilayer high blocking film.

The invention relates to a low-temperature heat-sealing high-barrier food packaging film coating latex. The composition points of the mixed monomer of the latex is that vinylidene chloride accounts for 80 to 93 percent of the total amount of the mixed monomer; methyl acrylate, methyl ethyl oxalate, methyl methacrylate, butyl ester, acrylonitrile or methacrylonitrile account for 2 to 10 percent of the total amount of the mixed monomer; itaconic acid, acrylic acid, methacrylic acid account for 0.5 to 5 percent of the total amount of the mixed monomer; the surfactants added are 0.7 portion of SAS and 0.3 portion of sodium dodecyl sulfate; the additive 3 is 0.01 portion of metallic salt. The preparation method includes the following steps: deionized water, surfactant and additive are added in a reactor; the reactor is vacuumized and the gas is replaced by nitrogen gas; the mixed monomer is added. The product of the invention has the advantages of low temperature heat sealing and high barrier performance, and the food using the product has longer shelf life.

Herein is disclosed an oxygen barrier composition comprising an oxygen barrier polymer and an oxygen scavenging polymer. Preferably, the oxygen barrier polymer is selected from polymers or copolymers of vinyl alcohol, polyesters, polymers or copolymers of vinylidene dichloride, polymers or copolymers of epoxies, polysulfones, polymers or copolymers of acrylonitrile, polymers or copolymers of isocyanates, or polyamides other than MXD6; and the oxygen scavenging polymer either comprises an ethylenic backbone and a cyclic olefinic pendant group of structure I, or a polyester group of structure II or structure III:

wherein q₁, q₂, q₃, q₄, and r are independently selected from hydrogen, methyl, or ethyl; m is —(CH₂)_n—, wherein n is an integer from 0 to 4, inclusive; X is null or a linking group; and, when r is hydrogen, at least one of q₁, q₂, q₃, and q₄ is also hydrogen. The oxygen barrier composition can be formed into an oxygen barrier layer of a packaging article. Such layers and articles, and methods for making same, are also disclosed.

The present invention relates to water-thinned PVDC latex, and is especially a kind of water-thinned PVDC latex for painting special cloth and its preparation process. The water-thinned PVDC latex is prepared with mixed monomer through emulsion polymerization in the presence of emulsifier and initiator. The mixed monomer includes vinylidene chloride 75-90 %, acrylate monomer 8-20 % and unsaturated fatty acid 1-5 %. The water-thinned PVDC latex is used in treating non-woven fabric, and the treated non-woven fabric is hard, elastic, waterproof, heat resistant and crease resistant and may be used widely. In addition, the water-thinned PVDC latex has excellent compatibility with acrylic acid emulsion.

The invention relates to a cooking-resistant polyvinylidene chloride coating film and a preparation method thereof. The cooking-resistant polyvinylidene chloride coating film comprises a substrate and a coating layer on the surface of the substrate, wherein a primer layer is formed between the coating layer and the substrate; the coating layer is a modified polyvinylidene chloride coating which is formed by coating a cooking-resistant polyvinylidene chloride emulsion on the surface of the primer layer and drying; the cooking-resistant polyvinylidene chloride coating film is prepared from the following raw materials in parts by weight: 25-95 parts of polyvinylidene chloride blending emulsion, 0-70 parts of softened water, 0-15 parts of slip agent and 0.1-5 parts of adhesive; and the polyvinylidene chloride blending emulsion is prepared form the following raw materials in parts by weight: 88-98.5 parts of polyvinylidene chloride emulsion and 1.5-12 parts of tetraethylenepentamine. The coating film has the advantages of cooking resistance, transparency, environment friendliness, safety, innocuity and low cost and can be used for packaging foods directly through compounding; the foods and a packaging bag are cooked together and subjected to high-temperature disinfection, and a customer can directly eat after opening the packaging bag.

Lubricant compositions and processes for producing such lubricant compositions. More specifically, low viscosity lubricant compositions for the working surface of an extrusion die during the processing of plastics that require lubricants to render them processable, such as polyvinyl chloride, chlorinated polyvinyl chloride, polyvinylidene chloride and copolymers thereof. The lubricant composition may include up to about 70% by weight of at least one metal salt while maintaining a melt viscosity low enough to process on conventional finishing equipment such as prill towers or pastillating equipment.

Novel carbon molecular sieve (CMS) compositions comprising carbonized vinylidene chloride copolymer having micropores with an average micropore size ranging from 3.0 to 5.0 angstroms. These materials offer capability in separations of gas mixtures including, for example, propane/propylene; nitrogen/methane; and ethane/ethylene. Such may be prepared by a process wherein vinylidene chloride copolymer beads, melt extruded film or fiber are pretreated to form a precursor that is finally carbonized at high temperature. Preselection or knowledge of precursor crystallinity and attained maximum pyrolysis temperature enables preselection or knowledge of a average micropore size, according to the equation sigma= 6.09 +(0.0275*C) - (0.00233*T), wherein sigma is the average micropore size in Angstroms, C is the crystallinity percentage and T is the attained maximum pyrolysis temperature in degrees Celsius, provided that crystallinity percentage ranges from 25 to 75 and temperature in degrees Celsius ranges from 800 to 1700. The beads, fibers or film may be ground, post-pyrolysis, and combined with a non-coating binder to form extruded pellets, or alternatively the fibers may be woven, either before or after pre-treatment, to form a woven fiber sheet which is thereafter pyrolyzed to form a woven fiber adsorbent.

The invention relates to a high-oxygen resistant steaming-resistant polyvinylidene chloride coating film and a manufacturing method thereof. The high-oxygen resistant steaming-resistant polyvinylidene chloride coating film comprises a base, a coating layer on the surface of the base, and a base glue layer between the coating layer and the base. The coating layer is a coating obtained by coating modified high-oxygen resistant steaming-resistant polyvinylidene chloride latex. The modified high-oxygen resistant steaming-resistant polyvinylidene chloride latex comprises: by weight, 30 to 38% of a high-oxygen resistant steaming-resistant polyvinylidene chloride blended emulsion, 1.5 to 6% of a nano-material filler, 1 to 8% of a slip agent, 0.1 to 5% of an abherent and 5 to 60% of softened water. The high-oxygen resistant steaming-resistant polyvinylidene chloride blended emulsion comprises: by weight, 40 to 94% of a vinylidene chloride monomer, 1.5 to 10% of an acrylate, 1 to 6% of one or more of acrylic acid and acrylonitrile, 0.5 to 2% of an initiator, 0.1 to 0.8% of an emulsifier, 0.5 to 1% of a stabilizer and 0 to 55% of soft water.

The invention discloses a preparation method of spherical polyvinylidene chloride resin with micropore structures. The preparation method comprises the following steps: (1) adding 100 parts of water and 0.5-2 parts of an organic dispersant in parts by weight into a reaction kettle, and uniformly stirring to obtain aqueous phase liquor; (2) uniformly stirring 100 parts of vinylidene chloride, 10-20 parts of a cross-linking agent, 0.5-2 parts of monounsaturated fatty acids, 0.5-2 parts of a peroxide initiator and 10-40 parts of a pore-foaming agent in parts by weight to obtain oil phase liquor; and (3) adding the oil phase liquor prepared in the step (2) into the reaction kettle filled with the prepared aqueous phase liquor in the step (1) in a weight ratio of (1.5-1.6):1, reacting for 10-20 hours at 70-100 DEG C, discharging after reaction, and water-washing, drying and separating the pore-foaming agent to obtain a spherical polyvinylidene chloride resin product with the micropore structures. The spherical polyvinylidene chloride resin with the micropore structures disclosed by the invention has the advantages of great grain size of the product prepared, high specific surface area, good mechanical property, long service life and the like.

The invention relates to a vinyl chloride-vinylidene chloride (VDC)/acrylic acid (AA)/methyl methacrylate (MMA)/acrylonitrile (AN) copolymerized polyvinyl dichloride (PVDC) emulsion and a preparation method thereof. The emulsion consists of the following components according to parts by weight: 90-96 parts of a vinylidene chloride monomer, 1-2 parts of an acrylic monomer, 4-5 parts of acrylonitrile, 3-4 parts of a methyl methacrylate monomer, 0.2-0.3 part of am initiator, 1-2 parts of an emulsifier, 90-100 parts of a dispersant and 0.0001-0.0002 part of a pH regulating agent. According to the emulsion, the content of the vinylidene chloride monomer is increased, so that a good water resistance is guaranteed after drying latex, and acrylate soft monomer is added to guarantee a certain softness of processed fabric. A thin film coated by the emulsion disclosed by the invention is comparatively hard, and has good elasticity and barrier property; and in addition, the aqueous latex disclosed by the invention, in comparison with acrylic emulsion, has a good solubility, and has a quite excellent modification effect by combining with an acrylic emulsion-type processing agent.

The invention provides poaching type special polyvinyl dichloride (PVDC) rubber latex which is excellent in poaching resistance and heat-sealing property and a preparation method thereof. According to the preparation method, seeded emulsion polymerization is adopted and proper amount of microcrystalline wax is added before a vacuum desorption aftertreatment process. Parts by weight of each component are calculated by 100 parts and comprise 50 parts of monomer mixtures, initiation agents, mixing and emulsifying agents, seeded emulsifying agents and additives; the monomer mixtures comprise 89.5-92.5 % of vinylidene chloride by weight of the total monomer mixtures, 1.2-1.8 % of (methyl) acrylonitrile, 2.5-3.0 % of methyl butyl acrylate, 2.9-5.9 % of methyl methacrylate and 0.1-0.4 % of methacrylic acid; the initiation agents comprise tert-butyl hydroperoxide and sodium formaldehyde sulfoxylate; the mixing and emulsifying agents comprise sodium dodecylbenzene sulfonate and secondary chain alkyl sulfonate; the seeded emulsifying agents comprise sodium dodecylbenzene sulfonate; and the additives comprise ammonium acetate and ferrous chloride. The poaching type special PVDC rubber latex can be coated on nylon and polyethylene terephthalate (PET), and can be used for packaging poaching food.

The invention relates to a vinylidene chloride copolymer composition, the stretch processing adaptability during a melt molding process is excellent, thereby membrane thickness uniformity of the obtained membrane or the sheet material is excellent, and the high frequency seal adaptability and heating pressurization sterilization adaptability (so-called boiling adaptability) of the provided membrane or the sheet material are excellent; The vinylidene chloride copolymer is the vinylidene chloride copolymer formed by vinylidene chloride and a polymerism vinyl monomer, wherein, through the differential scanning calorimetry thermal detection (DSC), and the heat release summit time of the vinylidene chloride copolymer detected in an isothermal crystallization detection at 70 DEG C is less than 10 minutes.

The invention provides a synthesis process of 2-chlorin-5-((2-(nitryl methylene) imidazoline-1-yl) methyl) pyridine. Particularly, the method comprises the following steps: preparing 2-nitryl methylene imidazolidine from vinylidene chloride serving as a raw material; and reacting the 2-nitryl methylene imidazolidine with a 2-chlorin-5-chloromethyl pyridine compound so as to form 2-chlorin-5-((2-(nitryl methylene) imidazoline-1-yl) methyl) pyridine. The synthesis process has the advantages that raw materials are easily available, production cost is low, conditions are mild, and the operation is simple and convenient; moreover, synthesis process is environmentally-friendly and suitable for industrial production.

The invention discloses a fluoride-contained textile finishing agent and a preparation method thereof. The fluoride-contained textile finishing agent is copolymerized by emulsion via oxa perfluoroalkyl (methyl) acrylate monomer, higher aliphatic alcohol (methyl) acrylate monomer, crosslinking monomer and enhanced monomer in the presence of a complex emulsifying agent, an emulsion accelerator, a chain transfer agent, a stabilizing agent and an initiating agent; vinylidene chloride or chloroethylene is used as the enhanced monomer; the mass of the enhanced monomer is 5-40% of total mass of the monomer; polypropylene glycol or segmented copolymer of the polyethylene glycol and polypropylene glycol is used as the emulsion accelerator; the mass of the emulsion accelerator is 5-50% of total mass of the monomer; stearoylbenzoylmethane is used as the stabilizing agent; and the mass of the stabilizing agent of 0.5-5% of the total mass of the monomer. The fluoride-contained textile finishing agent has the advantages of high washable degree and does not pollute the environment.

An artificial hair fiber bundle comprising: a mixture of a synthetic acrylic base fiber (A) made of an acrylic base copolymer containing acrylonitrile, vinyl chloride and vinylidene chloride and a vinyl monomer copolymerizable therewith, a synthetic acrylic base fiber (B) made of an acrylic base copolymer containing acrylonitrile, vinyl chloride and a vinyl monomer copolymerizable therewith; and a synthetic polyvinyl chloride base fiber having a monofilament fineness of 30 to 90 decitexes, provides a hair decorative product superior in stylability and sensory characteristics and favorable for use as a wig, hairpiece, or the like.

The invention discloses a composite packaging bag for beverages and relates to the technical field of beverage packaging bags. Films made of three raw materials, namely low density polyethylene, two-way stretch polyamide and polyvinylidene chloride are subjected to low/high-pressure rolling no-glue compositing, then are cured, cooled and sliced, and are subjected to thermal inductance pressing and cutting to form a bag. A production method has the energy-saving effect and is low in pollution. The produced composite packaging bag is high in tensile strength, low in oxygen permeation rate, resistant to oil, high temperature and low temperature, high in air impermeability, low in specific gravity, low in cost, quick and novel in packaging, and has the environment-friendly effect.

The invention discloses a manufacturing method of cationic room-temperature crosslinking water-based vinylidene chloride metal anti-corrosion paint, which is characterized in that resin of the paint is cationic vinylidene chloride latex; an cationic emulsifier is polymerized with high pressure emulsions of a vinylidene chloride monomer and an acrylate monomer; an initiator is mixed by an oil-soluble initiator and a water-based initiator; the prepared vinylidene chloride latex is good in mechanical stability, and can be grinded together with a rust-resistant pigment; the cationic durability is good; cations dissociated from the rust-resistant pigment do not influence the storage stability of the water-based paint; and the anti-corrosion effect is excellent.

The invention provides polyvinylidene chloride copolymer emulsion for pharmaceutical packing coating and a preparation method and application thereof. The copolymer emulsion is manufactured by adopting of seeded emulsion polymerization and adding of microcrystalline wax in the process of vacuum desorption, and parts by weight of components of the copolymer emulsion are calculated by 100 parts including 60 parts of monomer mixture, initiating agent, seeded emulgato, mixed emulgator and addition agent. The monomer mixture comprises 90-94% vinylidene chloride, 3-5% crylic acid-2-phthalic acid ester, 2-5% metacrylic acid ester monomer and 0.2-1.5% methylacrylic acid, the initiating agent comprises tert-butyl hydroperoxide and sodium formaldehyde sulfoxylate, the seeded emulgator comprises sodium dodecyl benzene sulfonate and non-ionic emulsifier, and the mixed emulgator comprises sodium sulfonate emulgator, non-ionic emulsifier and negative ion reaction type emulsifier. The obtained pharmaceutical packing coating is good in separation performance (west separation and oxygen separation), low in vinylidene chloride residuals, and low in cost, a quality guarantee period of pharmaceutical packing reaches 3 years and is up to an international standard of plastic uptake drug packing, copolymer emulsion stability is good, and a quality guarantee period of the emulsion is more than two years.