37results about How to "Long thermal stability time" patented technology

This invention discloses a sulfur-containing metal carboxylate composite stabilizer and its application. The sulfur-containing metal carboxylate composite stabilizer comprises: sulfur-containing metal carboxylate, metal salt stabilizer, organic metal stabilizer, lubricant, and organic auxiliary stabilizer. The sulfur-containing metal carboxylate composite stabilizer can be used in halogen-containing polymers to increase their processing stability. The sulfur-containing metal carboxylate composite stabilizer has such advantages as long thermal stabilization period, low early coloration, and low toxicity.

The invention discloses polyol ester and application of the same to processing of a halogenated vinyl polymer. The polyol ester is prepared by subjecting one of polyols and one selected from a group consisting of carboxylic acid and acid anhydrides to esterification or subjecting one of polyols and one of the esters of carboxylic acid to transesterification. The polyol ester provided by the invention has good compatibility with the halogenated vinyl polymer and can improve the hot-working performance of the halogenated vinyl polymer when cooperated with a heat stabilizer; in particular, the polyol ester can inhibit or alleviate the phenomenon of zinc burning of a zinc-containing heat stabilizer in the later phase of hot-working when cooperated with the zinc-containing heat stabilizer; so the whiteness of a halogenated vinyl polymer product is improved, later zinc burning is effectively inhibited, the thermostabilization time, particularly medium-and-long-term heat stability, of the halogenated vinyl polymer (especially PVC) is substantially prolonged, and the defect of poor stability in the later phase of the zinc-containing heat stabilizer is compensated for. The polyol ester has good application prospects in the field of processing of the halogenated vinyl polymer, especially PVC.

The invention discloses a PVC (Polyvinyl Chloride) heat stabilizer with long heat stability time. The PVC heat stabilizer is applied to PVC products having high requirement on heat stability time and good color changing resistance. According to the PVC heat stabilizer, talcum, hydroxide and zeolite are used as main modifiers and a special antioxidant is added. The phenomena of relatively short heat stability time and poor color change resistance are solved. The PVC heat stabilizer has excellent properties, is environmentally-friendly and wins the competitive power for Chinese enterprises in European and American markets.

The invention provides a middle material layer of a plastic floor and the plastic floor obtained by the same. The middle material layer of the plastic floor is prepared from the following raw materials in parts by weight: 90-95 parts of polyvinyl chloride, 28-33 parts of a plasticizer, 2.1-3 parts of a stabilizer, 0.2-0.5 part of carbon black, 455-465 parts of calcium carbonate and 6.2-10.5 parts of chlorinated polyethylene. A certain amount of chlorinated polyethylene is added into the formula of the middle material layer, the chlorinated polyethylene and the polyvinyl chloride have good compatibility, so that the toughness of the polyvinyl chloride is improved, the flexibility and the tensile force of the plastic floor product are improved, and the expansion rate and the shrinkage rate of the plastic floor are reduced; the weather resistance of the plastic floor is improved by using the high weather resistance of the chlorinated polyethylene, and thus the physical performance of the plastic floor is more excellent. In addition, the plasticizer adopts dioctyl terephthalate and is environment-friendly and non-toxic and long in thermal stable time, the plasticizer is prepared from natural oil, has the characteristics of fire resistance, no toxicity and environmental protection.

The invention discloses a nano flame-retardant antistatic air duct cloth and a preparation method thereof. The nano flame-retardant antistatic air duct cloth is prepared by dipping synthetic fibrous base cloth into PVC flame-retardant antistatic plasticizing paste containing a nano penetrating agent, flattening the synthetic fibrous base cloth by a flattening machine, heating and plasticizing thesynthetic fibrous base cloth in a drying oven to prepare a covering film with a flat and smooth surface, and cooling the covering film to obtain the nano flame-retardant antistatic air duct cloth. Theplasticizing paste completely permeates into the synthetic fibers, and the problem of air leakage of an air duct caused by easy falling and skin breaking of a covering film in the prior art is solved. Synthetic vegetable fatty acid ester with flame-retardant and antistatic properties and stone, ceramic tiles and artificial stone polishing slag with flame-retardant and smoke-suppressing propertiesare added into the formula, so that the problem that the flame-retardant property is weakened due to the addition of a large amount of a small molecular plasticizer in the prior art is solved. A large amount of polishing slag taken as an inorganic filler is added, the production cost is reduced, the flame retardant property and smoke suppressing performance of the product are improved, the problems that the polishing slag is difficult to recycle and environmental pollution is caused by waste landfill are solved, and waste is turned into resources.

The invention discloses a preparation method of graphene reinforced polyketone fibers. The preparation method comprises the following steps of firstly, uniformly mixing graphene with a surface treating agent; adding polyketone granules, and continuously melting and uniformly mixing to obtain a graphene/polyketone mixture; carrying out melt spinning on the graphene/polyketone mixture to prepare fused filaments; and finally, cooling the fused filaments through an air channel, and carrying out hot roller drafting and heat setting to prepare the graphene reinforced polyketone fibers. The grapheneis adopted as a reinforcing modification material of the polyketone, and is evenly dispersed in polyketone to play roles in an obstructing effect, a high heat conduction effect and a reinforcing effect. And the barrier property of graphene is utilized to weaken the acting force between ketone groups. A rate of transferring heat from the equipment to a polymer molecular chain is increased, and thetime required for the polyketone to form a crystal-nucleus-free melt is shortened. In the drafting process, the graphene is oriented in the axial direction of the fiber, polyketone molecular chains are induced to regularly grow and be arranged on the surface of the graphene, a string-shaped crystalline structure is formed, and the ultrahigh-strength polyketone fiber is obtained.

The invention discloses a manufacture method of a poly vinyl chloride PVC product. The method comprises the step of adding a bridge linking agent to a heat stabilizer required to be added to PVC particles, wherein the bridge linking agent is a substance containing a hydrophilic group and a lipophilic group in the molecular structure. The method is to fully mix the PVC molecule and the heat stabilizer under a bridging effect of the bridge linking agent, so as to achieve the purpose of fully performing the effect of the heat stabilizer and reducing the amount of the used heat stabilizer. The heat stabilizing time of the PVC product can be prolonged under the condition that the same quantity of heat stabilizer is added; and the quantity of added heat stabilizer can be correspondingly reduced with the same heat stabilizing time, therefore, the cost for manufacturing the PVC product can be reduced, and the toxicity of the PVC product also can be reduced; the benefit is brought to the health of a manufacturer and a user of the PVC product; and a more environment-friendly effect is achieved.

The invention relates to a liquid barium/zinc transparent composite heat stabilizer for PVC (Polyvinyl Chloride). The liquid barium/zinc transparent composite heat stabilizer is prepared from a main stabilizer and an auxiliary heat stabilizer, wherein the main stabilizer is a composite heat stabilizer prepared from barium isotanoate and zinc isoocatanoate according to a certain proportion; the auxiliary heat stabilizer is hydrotalcite or organic tin. The barium/zinc composite heat stabilizer is creatively selected as a main stabilizer of a PVC material, and a best synergistic effect is achieved by limiting the proportion of the barium isotanoate to the zinc isoocatanoate at 3/1; compared with the prior art, the liquid barium/zinc transparent composite heat stabilizer has the advantages of prolonged heat stabilizing time, better aging-resisting effect, higher transparence and better effect than other schemes in the prior art.

The invention discloses a polishing slag modified flame-retardant PVC plasticizing paste and a preparation method thereof. According to the polishing slag modified flame-retardant PVC plasticizing paste, synthetic vegetable fatty acid ester with flame retardance and stone, ceramic tiles and artificial stone polishing slag with flame retardance and smoke suppression are added into a formula to generate a synergistic flame-retardant effect through the matching of the two components; the synthetic vegetable fatty acid ester can absorb a large amount of oxygen, and be oxidized and decomposed intoCO2 and H2O after being heated, the CO2 isolates the oxygen, and the H2O takes away heat, so that the flame retardance is achieved; the abrasive dust in the polishing slag contains magnesium oxide, magnesium hydroxide, magnesium chloride hexahydrate and other materials, and is a composite flame retardant with multiple flame retardant mechanisms; and the SiO2 powder in the polishing slag is non-flammable and resistant to high-temperature decomposition, is used as a filling agent to be filled into a paste resin product in quantity, and can form a carbonization layer on the surface of the productduring combustion, so that heat and oxygen are prevented from entering, and the flame retardant mechanism of dehydration, dilution, heat absorption and cooling of the flame retardant can play a greatrole in flame retardance and smoke suppression.

The invention belongs to the technical field of plastic processing, in particular relates to a composite lead salt thermally-stable anti-degradation auxiliary agent as well as a preparation method andapplication thereof. The composite lead salt thermally-stable anti-degradation auxiliary agent provided by the invention comprises the following raw material components by mass percentage: 35-60% ofbasic lead salt, 0-10% of an acid binding agent, 10-20% of a lubricant, 0-2% of titanium dioxide, 5-18% of fly ash and 10-40% of calcium carbonate. Results of embodiments show that the composite leadsalt thermally-stable anti-degradation auxiliary agent provided by the invention has outstanding thermal stability performance, can effectively improve the degradation temperature of polyvinyl chloride, and has high initial whiteness and good long-term stability.

The invention discloses a barium-cadmium-zinc composite stabilizer and a preparation method thereof. The barium-cadmium-zinc composite stabilizer is prepared from fatty acid cadmium, fatty acid barium, solvent oil, fatty acid zinc, pentaerythritol, phosphite ester and an antioxidant. The barium-cadmium-zinc composite stabilizer has the beneficial effects that the barium-cadmium-zinc composite stabilizer provided by the invention has the advantages of good compatibility with PVC resin, long thermal stability time, high transparency, no dust pollution and the like, and plays a role in thermal stability during polyvinyl chloride processing. The invention also provides the preparation method of the barium-cadmium-zinc composite stabilizer, so as to obtain the barium-cadmium-zinc composite stabilizer.

The invention discloses a polishing slag modified PVC flame-retardant electric insulation rubber mat. According to the polishing slag modified PVC flame-retardant electric insulation rubber mat disclosed by the invention, the synthetic vegetable fatty acid ester with flame retardance and polishing slag with flame retardance and smoke suppression are added into the formula, and the synthetic vegetable fatty acid ester and the polishing slag are synergistically used to generate better flame retardance and smoke suppression effects. The polishing slag modified PVC flame-retardant electric insulation rubber mat is prepared by mixing, extruding and cutting. The problems that the chlorine content of a PVC elastomer flame-retardant material is reduced and the flame-retardant property is reduced due to the addition of a large amount of small molecular plasticizers in the prior art are solved. A large amount of polishing slag is added as an inorganic flame-retardant filler, so that the production cost of the PVC flame-retardant electric insulation rubber mat is reduced, the flame retardance and smoke suppression performance of the product are improved, the problems that stone, ceramic tilesand artificial stone polishing slag is difficult to recycle and environmental pollution is caused by waste landfill are solved, and waste is turned into wealth.