34results about How to "TVOC reduction" patented technology

The invention belongs to the technical field of polypropylene materials, and discloses environment-friendly flame retardant low-odor modified polypropylene and a preparation method and application of modified polypropylene in inner decoration of a school bus. The environment-friendly flame retardant low-odor modified polypropylene comprises the following components by weight percent: 40-90% of polypropylene, 4-30% of a flame retardant, 2-20% of an antismoke agent, 2-5% of an odor adsorbent, 1-5% of a TVOC (Total Volatile Organic Compound) remover and 0.3-1.2% of a stabilizer. According to polypropylene provided by the invention, the effect of excellent mechanical property, good flame retardant effect and low smoke density is realized by selecting a special low-odor nitrogen and phosphorus halogen-free flame retardant and metal hydroxide as the antismoke agent. The odor adsorbent and the TVOC remover are added to effectively remove TVOC and other small molecular matters, so that the modified polypropylene which satisfies the demand on excellent mechanical property, good flame retardant effect, low smoke density, low odor and low TVOC is prepared, and the modified polypropylene can be suitable for inner decoration of the school bus.

The invention relates to a formaldehyde-free antibacterial bamboo straw composite substrate and a preparation method thereof, wherein the preparation method includes in-situ preparation of an antibacterial adhesive: using lignin to reduce silver ions in situ to generate nano-silver to obtain an antibacterial adhesive Preparation of composite base material: the base material includes bamboo scraps and / or straw scraps with a length of 0.3-20.0mm and a thickness of 0.3-0.7mm, which are mixed to obtain a mixture of surface layer and core layer; aldehyde-free antibacterial Preparation of bamboo straw composite substrate: mix and sizing the upper surface layer mixture, the lower surface layer mixture and the core layer mixture with antibacterial adhesive and / or isocyanate adhesive respectively to obtain the sizing For mixing materials, the mixed materials after sizing are paved, hot-pressed and post-treated to obtain the formaldehyde-free antibacterial bamboo straw composite base material. The method provided by the invention makes full use of the existing bamboo and straw resources, and the prepared composite base material has extremely low formaldehyde emission, meets the requirements of the "formaldehyde-free wood-based panels and their products" standard, and has excellent antibacterial properties.

The invention relates to a polyvinyl acetate emulsion and a preparation method thereof. The polyvinyl acetate emulsion is prepared from raw materials comprising the following parts by weight: 15-35 parts of vinyl acetate; 0.1-0.7 parts of acrylic acid; 1-25 parts of vinyl acetate-ethylene copolymer; 0.6 parts of ethylene glycol diacetate ‑4 parts; 3‑9 parts of polyvinyl alcohol; 0.01‑0.4 parts of sodium lauryl sulfate; 0.01‑0.7 parts of antifreeze; 0.1‑5 parts of additives; 45‑75 parts of water. In the polyvinyl acetate emulsion, the content of formaldehyde and TVOC is less than the national standard, does not contain APEO and phthalate, and meets the foreign limit standard.

The invention discloses a biological peculiar smell scavenger and a production method thereof. The scavenger comprises bacillus megaterium (CGMCC 1.2393), candida utillis (CGMCC 2.1012) and azotobacter chroococcum (CGMCC 1.2391). The production method for the scavenger comprises the following steps of: inoculating the activated bacillus megaterium, candida utillis and azotobacter chroococcum into a silicate group bacteria culture medium, a wort culture medium and a nitrogen-fixing culture medium to perform seed liquid culture respectively; and mixing the three seed liquids in a mass part ratio of 0.5-1.5: 1-2: 1-2, and adjusting the concentration of the mixed solution as required. The biological peculiar smell scavenger sprayed to a place with peculiar smell can remarkably reduce the stench TVOC, particularly has obvious effect of reducing ammonia, aldehyde and benzene, and has the advantages of low cost, no secondary pollution and convenient use.

The present disclosure provides a novel transition metal compound which exhibits excellent catalytic activity and is useful in the preparation of a polypropylene having high impact strength, and a method for preparing a homo polypropylene using the same.

The invention provides a one-component silane-modified polyether sealant for automobiles and a preparation method thereof. The raw materials of the one-component silane-modified polyether sealant for automobiles include silane-modified polyether resins and functional fillers. The raw materials of functional fillers include nano activated carbon, carbonate, silicate, photocatalyst and heat activated catalyst. The present invention utilizes nano-activated carbon, carbonate and silicate to adsorb organic gases, and since the composite material also contains photocatalysts and heat-activated catalysts, the adsorbed small molecules can be catalyzed, oxidized, and degraded under the conditions of light and heating. The degradation products are mainly water and carbon dioxide, thereby reducing the TVOC of the product and avoiding the desorption problem of nano-activated carbon at high temperature.