9 results about "Vinylchloride polymer" patented technology

To provide a vinyl chloride-based polymer that has, when dissolved in a solvent, excellent filterability.SOLUTION: A method for producing a vinyl chloride-based polymer comprises a polymerization step of suspension-polymerizing a monomer mixture comprising vinyl chloride monomer and a monomer copolymerizable with vinyl chloride monomer in the presence of an aldehyde, wherein the added amount of the aldehyde is 0.1 wt.% to 4.0 wt.% relative to the weight of the monomer mixture, the whole charged amount of the monomer copolymerizable with vinyl chloride monomer relative to the whole charged amount of vinyl chloride monomer and the monomer copolymerizable with vinyl chloride monomer is 16.0 wt.% to 22.0 wt.%, and the amount of initial charge of vinyl chloride monomer relative to the whole charged amount of vinyl chloride monomer is 28.0 wt.% to 38.0 wt.%.SELECTED DRAWING: None

The invention provides a method for preparing an adhesive by aminating polyvinyl chloride under a non-catalytic photo-thermal action, which is characterized by comprising the following steps of: putting a polyvinyl chloride polymer or a consumed polyvinyl chloride plastic waste material into a photo-thermal reaction system, and reacting under the condition of no additional catalyst; and reacting with an amination reagent (such as butylamine, aniline, imidazole and other organic amines) at a low temperature (lower than 80 DEG C) in a green solvent under the auxiliary action of illumination for 4-18 hours to directly generate the amination modified PVC-based adhesive. The adhesive prepared by the method can be used for bonding wood building materials, glass, resin and metal plates, and has good bonding strength, water resistance, weather resistance and flame retardance. Through the non-catalytic photo-thermal synergistic effect, the direct conversion from the polyvinyl chloride waste to the high-added-value adhesive is realized in one step, the process conditions are mild, the operation is simple and convenient, a new path is provided for green recovery and value-added utilization of polyvinyl chloride, and the method has good industrial application potential.

To provide: a method for preparing a vinyl chloride-based polymer that can have excellent balance between the CPA and the bulk density of the vinyl chloride-based polymer while reducing the content of an unreacted monomer remaining in a final product; and a vinyl chloride-based polymer prepared by the preparation method.SOLUTION: The present invention relates to: a method for enabling preparation of a vinyl chloride-based polymer showing improved melting rate and mechanical properties and low harmfulness, by pre-mixing and injecting a mixed dispersant comprising polyvinyl alcohol of high hydration and a carbonate metal salt before polymerization, and then polymerizing a vinyl chloride-based monomer; and a vinyl chloride-based polymer prepared by the method.SELECTED DRAWING: None

A process for recycling vinyl chloride polymer material containing initial levels of one or more additive compounds includes the steps of providing an aqueous acid composition comprising one or more alcohols and one or more acids, contacting a quantity of the vinyl chloride polymer material with the acid composition to cause extraction of the one or more additive compounds from the vinyl chloride polymer material, wherein the acid composition forms a two-phase system with the vinyl chloride polymer material, the two-phase system comprising a solid phase comprising the purified vinyl chloride polymer material and a liquid phase comprising the alcohol, water, acid, and the extracted one or more additive compounds, and separating the solid phase comprising the purified vinyl chloride polymer material and the liquid phase comprising the extracted one or more additive compounds.

To provide a polyvinyl chloride polymer composition that gives a molding that retains the flame retardancy and high heat insulation inherent in the polyvinyl chloride polymer and has excellent rigidity and heat resistance, the polyvinyl chloride polymer composition suitable for window frames and the like, and a method for efficiently producing the same.SOLUTION: A polyvinyl chloride polymer composition contains a micro-fibrillated hydrophobic cellulose fiber (A), a fibrillation agent (B1) and a polyvinyl chloride polymer (C), and optionally contains an ethylene vinyl acetate-based copolymer (D). The micro-fibrillated hydrophobic cellulose fiber (A) is modified with a C2-5 acyl group, and the fibrillation agent (B1) is at least one compound selected from the group consisting of a polyhydric alcohol with a molecular weight of 130-400 and a lactone with a molecular weight of 86-115.SELECTED DRAWING: None

The invention discloses a high-adhesion weather-resistant chlorinated fluorocarbon-vinyl chloride coating for a polyethylene material and a preparation method thereof, and relates to the technical field of high polymer materials and coatings. The coating is composed of a component A and a component B, the component A is prepared from an organic solvent, chlorinated fluorocarbon-vinyl chloride polymer resin, an adhesion promoter, a functional aid, polydimethylsiloxane resin and the like; the component B is composed of an isocyanate curing agent; the adhesion promoter is silane coupling agent modified polyamide; the high-adhesion weather-resistant chlorinated fluorocarbon-vinyl chloride coating disclosed by the invention has high adhesion to a polyethylene material, is not easy to fall off from the polyethylene material, can effectively resist ultraviolet irradiation, keeps color and luster for a long time, has superstrong adhesion and good toughness, and ensures that the coating is not damaged after collision; the coating has excellent corrosion resistance, wear resistance, weather resistance and the like, so that the obtained coating can be sprayed on polyethylene substrates in various shapes.

The utility model relates to the technical field of vinyl chloride polymer hard pipes, and provides a high-pressure-resistant vinyl chloride polymer hard pipe which comprises a reinforcing layer, a first stabilizing block is fixedly installed on the outer wall of the reinforcing layer, and a second stabilizing block is fixedly installed on the right side of the first stabilizing block. The first thickening layer is fixedly installed at the outer end of the second stabilizing block, and a first supporting block is fixedly installed on the outer side of the first thickening layer, so that the problems that due to the fact that the pipe wall is thickened through an original high-pressure-resistant structure, the overall weight of the pipeline is increased, and the transportation and installation difficulty and cost are increased are solved; the technical problems that when the vinyl chloride polymer hard tube is transported and used, the outer wall of the vinyl chloride polymer hard tube is damaged by friction, a protection structure needs to be additionally arranged at the outer end of the vinyl chloride polymer hard tube subsequently, and the transportation cost is increased are solved.

The present invention relates to a vinyl chloride-based resin composition, which exhibits excellent cold resistance and permanent compression set properties by comprising an elastomer and a vinyl chloride-based polymer having a high degree of polymerization and a high polydispersity index.

To provide a vinyl chloride-based resin composition capable of preventing bleed-out of a plasticizer under high temperature and ultraviolet irradiation, and having superior long-term light resistance and weather resistance, and also to provide a molded article obtained using the resin composition.SOLUTION: A vinyl chloride-based resin composition comprising a vinyl chloride polymer (A), an aliphatic epoxy compound (B), and a maleic anhydride copolymer (C).SELECTED DRAWING: None