20 results about "Vinylidene Chlorides" patented technology

A water-repellent composition capable of imparting both favorable water-repellency and favorable slip resistance to a textile product is provided by A water-repellent composition comprising a non-fluorine copolymer (A) comprising a repeating unit derived from a hydrophobic monomer (a1) having a hydrocarbon group having 2 to 40 carbon atoms, and a repeating unit derived from at least one chloride monomer (a2) selected from the group consisting of vinyl chloride and vinylidene chloride, wherein in the non-fluorine copolymer (A), an amount of repeating units derived from the monomer (a2) is 1 to 9% by weight based on a sum of an amount of repeating units derived from the monomer (a1) and the amount of repeating units derived from the monomer (a2).

A water-repellent composition including: a non-fluorine copolymer (A) having a repeating unit derived from a hydrophobic monomer (a1) having a hydrocarbon group having 2 to 40 carbon atoms, and a repeating unit derived from at least one chloride monomer (a2) selected from the group consisting of vinyl chloride and vinylidene chloride; and an isocyanate derivative (B), where, in the non-fluorine copolymer (A), an amount of repeating units derived from the monomer (a2) is 1 to 15% by weight based on a sum of an amount of repeating units derived from the monomer (a1) and the amount of repeating units derived from the monomer (a2).

An aqueous latex [latex (L)] of a vinylidene chloride copolymer [copolymer (A)], wherein the copolymer (A) consists essentially ofrecurring units derived from vinylidene chloride (VDC) in an amount comprised between 89.0 and 91.0 wt % of the copolymer,recurring units derived from methacrylonitrile (MAN) in an amount comprised between 2.00 and 5.50 wt % of the copolymer,recurring units derived from at least one ionic comonomer (ICO) in an amount comprised between 0.5 and 1.4 wt % of the copolymer (A), andrecurring units derived from methylmethacrylate (MMA) in an amount such that the total of recurring units of VDC, MAN, ICO and MMA is 100 wt %,and wherein the latex (L) comprises at least one surfactant [surfactant (S)] in an amount comprised between 0.09 and 1.50 wt % of the copolymer (A).Process for the manufacture of the aqueous latex (L), film made therefrom and retort pouch prepared with such film.

The invention discloses a beta-acyloxy alkenyl amide derivative and a preparation method and application thereof, and relates to the field of organic synthetic chemistry, the preparation method of the beta-acyloxy alkenyl amide derivative comprises the following steps: mixing acyl chloride, aluminum trichloride and a solvent at 50-70 DEG C, adding vinylidene chloride, mixing, and reacting to obtain alpha-trichloromethyl ketone; the preparation method comprises the following steps: mixing alpha-trichloromethyl ketone with carboxylic acid or amino acid, secondary amine, a solvent and a catalyst, and reacting at 30-50 DEG C, the preparation method of the amide and / or polypeptide comprises the following steps: continuously stirring and reacting a beta-acyloxy alkenyl amide derivative, an amine compound and a solvent at 0-80 DEG C, and monitoring by adopting a TLC (Thin Layer Chromatography) point plate until the reaction is finished, so as to obtain a reaction solution; and separating and purifying. The method has the beneficial effects that the alpha-trichloromethyl ketone is prepared without separation and purification, so that the cost is saved, and the efficiency is improved; the prepared beta-acyloxy alkenyl amides belong to activated carboxylic acids, and are beneficial to the synthesis of amides and / or polypeptides.

A carbon molecular sieve (CMS) membrane can be advantageously prepared by pyrolyzing a membrane precursor composition, the membrane precursor composition comprising a carbon-forming polymer (e.g., polyimide) blended with a polyvinylidene chloride copolymer (PVDC), the polyvinylidene chloride copolymer being a reaction product of at least 60% by weight to 97% by weight of vinylidene chloride and at least one other comonomer, and the weight ratio of the carbon-forming polymer to the polyvinylidene chloride copolymer being greater than 1:99. The membrane precursor composition can be formed by dissolving the carbon-forming polymer and the PVDC in a solvent to form a stock solution. The stock solution can, for example, be formed into an asymmetric hollow fiber. The asymmetric hollow fiber can be heated to a temperature that dehydrochlorinates the PVDC and then subsequently heated in a non-oxidizing atmosphere to carbonize the polymer of the molded membrane, thereby forming the CMS membrane.

This invention discloses an interpenetrating network type PVDC emulsion, which is prepared by weight of the following components: 650-850 parts of vinylidene chloride monomer, 20-60 parts of styrene, 2-6 parts of organosilicon monomer, 25-55 parts of acrylate phosphate monomer, 3-5.5 parts of crosslinking monomer, 10-25 parts of hydrophilic monomer, 100-150 parts of comonomer, 10-30 parts of emulsifier, 0.5-1.5 parts of initiator, and 550-750 parts of deionized water. This invention has the advantages of simple process, good product stability, high barrier performance, excellent adhesion, and good water resistance.

Provided is a water repellent composition containing: a non-fluorinated copolymer (A) containing a repeating unit derived from a hydrophobic monomer (a1) having a C2-40 hydrocarbon group and a repeating unit derived from a chloride monomer (a2) being at least one type selected from the group consisting of vinyl chloride and vinylidene chloride; and an isocyanate derivative (B). In the non-fluorocopolymer (A), the amount of a repeating unit derived from the monomer (a2) is 1-15 wt% with respect to the total of the amount of the repeating unit derived from the monomer (a1) and the content of the repeating unit derived from the monomer (a2).

To provide a film that has a smooth surface, is excellent in appearance, and can suppress rust from occurring on facilities (such as piping) during high-temperature treatment in recycling.SOLUTION: In a film, the PVDC fraction index, expressed by the following formula (1), of a vinylidene chloride resin composition (PVDC) and a vinyl chloride resin composition (PVC) is 0.5 to 10.0 when observed 100 times by IR. PVDC fraction index=((PVDC-derived peak area / (PVDC-derived peak area + PVC-derived peak area)) standard deviation) / ((PVDC-derived peak area / (PVDC-derived peak area + PVC-derived peak area)) average value)×100 ... (1)SELECTED DRAWING: None

Provided is a water repellent composition containing a non-fluorinated copolymer (A) containing a repeating unit derived from a hydrophobic monomer (a1) having a C2-40 hydrocarbon group and a repeating unit derived from a chloride monomer (a2) that is at least one type selected from the group consisting of vinyl chloride and vinylidene chloride. In the non-fluorocopolymer (A), the amount of a repeating unit derived from the monomer (a2) is 1-9 wt% with respect to the total of the amount of the repeating unit derived from the monomer (a1) and the amount of the repeating unit derived from the monomer (a2).

To provide a stretched laminate film which is excellent in stretching stability and shrinkage performance, and has a low elastic modulus and excellent delamination, even when a vinylidene chloride copolymer is used as a barrier layer.SOLUTION: A stretched laminate film 100 has: an inner surface layer 10; an adhesive layer (A) 20 formed on the inner surface layer 10; a barrier layer 30 formed on the adhesive layer (A) 20; an adhesive layer (B) 40 formed on the barrier layer 30; and an outer surface layer 50 formed on the adhesive layer (B) 40. The outer surface layer contains a polyamide resin, a ratio of a thickness occupied by the outer surface layer 50 in the whole stretched laminate film 100 is 0.1% or more and less than 1.0%. The barrier layer contains a vinylidene chloride (VDC) copolymer. Both of tensile elastic moduli in the vertical direction and the lateral direction at 23°C are 50 MPa or more and less than 200 MPa, and both of thermal shrinkage factors in the vertical direction and the lateral direction at 80°C are 35% or more and less than 60%.SELECTED DRAWING: Figure 1

Method for making a carbon molecular sieves described herein may include applying an adhesive to exterior surfaces of polymeric hollow fibers at a first end of a plurality of polymeric hollow fibers, wherein the polymeric hollow fibers include polyimide, polyvinylidene chloride, or a combination thereof, and wherein the adhesive includes at least 75 wt. % polyimide, polyvinylidene chloride, or a combination thereof, based on the total weight of the adhesive; curing the adhesive on the exterior surfaces of the polymeric hollow fibers to form a carbon molecular sieve precursor; and pyrolyzing the carbon molecular sieve precursor to form a carbon molecular sieve, wherein the carbon molecular sieve includes a plurality of carbon hollow fibers and a carbonaceous adhesive residue on a first end of the plurality of carbon fibers.

This invention belongs to the field of polymer materials technology, specifically relating to polyethylene rotational molding resin powder for high-pressure hydrogen storage cylinder linings and its preparation method. The polyethylene rotational molding resin powder for high-pressure hydrogen storage cylinder linings of this invention is composed of the following raw materials: polyethylene, POE, polyvinylidene chloride, antioxidant, acid scavenger, lubricant, and modified boron nitride; the polyethylene rotational molding resin powder has a melt flow rate of 4.8–5.7 g / 10 min and a density of 0.932–0.938 g / cm³. 3 The bulk density is 0.39–0.45 g / cm³. 3 The flow time is 18–23 s / 100g, the particle size distribution is 40–60 mesh with 50%–65% of the particles, and the hydrogen permeability coefficient is 0.65–0.85 mol·m / (m 2 ·s·Pa)×10 ‑15 It has high bulk density, short dry flow time, reasonable particle size distribution, and low hydrogen permeability coefficient.

The invention discloses a high-performance PVDC (polyvinyl dichloride) preparation method based on microemulsion polymerization, and belongs to the technical field of PVDC emulsion polymerization, and the method comprises the following steps: preparing materials, pretreating raw materials, building and debugging a reaction device, dropwise adding an initiator, controlling a reaction process, and post-treating after the reaction is finished. According to the invention, the vinylidene chloride monomer is used as a core raw material, and the performance of PVDC is accurately regulated and controlled by adjusting the emulsifier and the co-emulsifier; free radical polymerization is initiated by an initiator, so that the PVDC emulsion with narrow particle size distribution and high crystallinity can be prepared; the reaction system is stable, the gel phenomenon is reduced, the monomer conversion rate is improved, and the production cost can be greatly reduced; the prepared PVDC product is uniform in particle size, the barrier property is remarkably improved, the shelf life of food is effectively prolonged, the requirements of multiple fields such as electronic protection and medicine packaging can be met, the application range is greatly expanded, a high-performance and reliable packaging material is provided for the industries such as food and medicine, and the economic benefits of enterprises are remarkably improved.

The invention discloses a PVDC emulsion for medicine packaging. The raw material formula is as follows by weight: 35-50 parts of vinylidene chloride monomer, 0.5-5 parts of comonomer, 0.1-0.5 parts of initiator, 0.01-0.1 parts of stabilizer, 5-7 parts of dispersant and 30-55 parts of deionized water. The dispersant is silica sol modified by a silane coupling agent. The PVDC emulsion for medicine packaging has the advantages of high thermal stability, low water vapor permeability, long-term storage stability and not easy to be crystallized and embrittled.

A method for preparing a carbon molecular sieve described herein can include applying a binder to an exterior surface of a polymeric hollow fiber at a first end of a plurality of polymeric hollow fibers, where the polymeric hollow fiber comprises a polyimide, polyvinylidene chloride, or a combination thereof, and where the binder is a polymer based on a total weight of the binder. The binder comprises at least 75% by weight of a polyimide, polyvinylidene chloride, or a combination thereof; curing the binder on the exterior surface of the polymeric hollow fiber to form a carbon molecular sieve precursor; and pyrolyzing the carbon molecular sieve precursor to form a carbon molecular sieve, wherein the carbon molecular sieve comprises a plurality of carbon hollow fibers and a carbonaceous binder residue on a first end of the plurality of carbon fibers.

The present invention provides a method for preparing a fluorine-containing emulsion, firstly adopting solution polymerization to obtain a vinylidene chloride oligomer solution with an epoxy group, then reacting with acrylic acid to open the epoxy group to obtain a vinylidene chloride oligomer solution with a double bond, then removing the solvent and unreacted monomers in the solution by reduced pressure distillation to obtain a vinylidene chloride oligomer with a double bond, and then using the oligomer as a monomer for emulsion polymerization to obtain a vinylidene chloride fluorine-containing emulsion with a low vinylidene chloride residual content. At the same time, the present invention provides a fluorine-containing surface protective agent containing the fluorine-containing emulsion and an application thereof in fabric finishing.

Provided is a filled packaging body that stably exhibits easy-openability at a longitudinal seal part and a vinylidene chloride-based resin stretched film that provides the filled packaging body.　A filled packaging body according to the present invention comprises a longitudinal seal part extending in the longitudinal direction and is obtained by filling and enclosing content in a cylindrical vinylidene chloride-based resin stretched film having both longitudinal directional end parts closed, wherein: the vinylidene chloride-based resin stretched film includes a resin composition containing a vinylidene chloride-based resin and an ethylene-based resin; the proportion of an ethylene-derived structural unit in the ethylene-based resin is not less than 50 mass%; the T-peel strength of the longitudinal seal part is 7-13 N / 15 mm; and among the total number of dispersed phases of the ethylene-based resin in the vinylidene chloride-based resin stretched film, the proportion of dispersed phases having a long width of not less than 2 μm is 20-50%.

The invention belongs to the field of preparation of fluorine-containing compounds, and particularly relates to a preparation method of 2, 4, 5-trifluorophenylacetic acid. According to the method, 2, 4, 5-trifluoroaniline is taken as a raw material, 2, 4, 5-trifluoro-(2, 2, 2-trichloroethyl) benzene is synthesized through two-step reaction, and then the target product 2, 4, 5-trifluorophenylacetic acid can be obtained through hydrolysis. The method comprises the following steps: firstly, generating a 2, 4, 5-trifluorobenzene diazonium salt intermediate at a relatively high temperature, and adding vinylidene chloride before the diazotization reaction is started; according to the method disclosed by the invention, salt formation is complete, vinylidene chloride can be rapidly subjected to a coupling reaction with 2, 4, 5-trifluoroaniline diazonium salt, and generation of azo compounds is reduced, so that the yield and the content of the obtained intermediate and the product are higher than those of a contrast file, and the hydrolysis step does not generate nitrogen-containing wastewater, so that the method conforms to the concept of green sustainable development.

The radiative cooling film material includes a film material; and a radiative cooling layer on an outer surface of the film material. The radiative cooling layer includes an infrared radiative layer having a radiative surface for radiating infrared light; and a light reflective layer on a side of the infrared radiative layer, which is opposite to the radiative surface. The infrared radiative layer is a resin material layer including a vinyl chloride resin or a vinylidene chloride resin and having a thickness adjusted so that the resin material layer emits heat radiation energy greater than absorbed solar energy in a wavelength range from 8 μm to 14 μm. The light reflective layer includes silver or a silver alloy, and the radiative cooling film material further includes a film material-side resin layer including a vinyl chloride resin or a vinylidene chloride resin as a rear surface portion of the film material.

To provide a water dispersion of a vinylidene chloride copolymer having both of gas barrier property and ultraviolet absorption property, and a film and a paper laminate having a layer constituted by coating with the water dispersion.SOLUTION: A water dispersion of a vinylidene chloride copolymer having an absorption coefficient at a wave length of 360 nm of 0.01 L / (g cm) or higher includes: 100 pts.mass of a vinylidene chloride copolymer; 0 pts.mass or more and 20 pts.mass or less of a macromolecular compound other than the vinylidene chloride copolymer, where the content of a structural unit derived from vinylidene chloride in the vinylidene chloride copolymer is 80 mass% or more. A film or a paper laminate has a vinylidene chloride copolymer layer constituted by coating with a water dispersion of a vinylidene chloride copolymer having an absorption coefficient at a wave length of 360 nm of 0.01 L / (g cm) or higher.SELECTED DRAWING: None