57results about How to "Low smoke toxicity" patented technology

The invention relates to the field of single-component polyurethane foam sealants and in particular relates to a high-flame-retarding, halogen-free, low-smoke and low-toxin single-component polyurethane foam sealant with an oxygen index greater than or equal to 32 and a preparation method thereof. The high-flame-retarding, halogen-free, low-smoke and low-toxin single-component polyurethane foam sealant with oxygen index greater than or equal to 32, provided by the invention, is prepared from a halogen-free polyurethane foam sealant basic material, a reaction type flame retardant which has a lasting flame-retarding property, contains phosphorus, nitrogen, silicon and a heteroaromatic ring and has no halogen, a halogen-free solid addition type flame retardant with an expansion property, a halogen-free liquid addition type flame retardant with low viscosity, plasticity and compatibility, and an environment-friendly, cheap and easy-to-obtain halogen-free foaming agent. By adopting the raw materials, the whole single-component polyurethane foam sealant has no halogen component and has the oxygen index greater than or equal to 32, high flame-retarding property, low smoke density and low smoke toxicity; the high-flame-retarding, halogen-free, low-smoke and low-toxin single-component polyurethane foam sealant is especially applicable to fields including special buildings with strict high-flame-retarding and high-environment-friendly requirements, important transportation means and the like.

The invention discloses a high-strength environment-friendly flame-retarding fiberboard which comprises the following raw materials of plant fibers, flame retardants, adhesives and waterproofing agents, wherein the weight ratio of the plant fibers to the flame retardants to the adhesives to the waterproofing agents is 100:(3-30):(3-30):(0.1-4). The invention also discloses a manufacturing method of the high-strength environment-friendly flame-retarding fiberboard. Not only are the mechanical properties of the flame-retarding fiberboard obviously improved, but also the combustion property can conform to the regulations of GB8624 Class B or Class C, and the formaldehyde emission, the smoke volume produced and the smoke toxicity are also reduced. Thus, the high-strength environment-friendly flame-retarding fiberboard has good quality and low price, can be widely applied to the fields of building furnishings, flame-retarding furniture production, flame-retarding floor production, wooden fireproof door production, ship and vehicle furnishings and the like, and has good economical and social benefits.

The invention discloses a polymethacrylimide (PMI) foam material with low smoke, low toxicity and high flame retardancy. body, flame retardant system, foaming agent, nucleating agent, initiator and crosslinking agent are mixed to obtain a mixed solution, which is obtained by polymerization and foaming. The mass fraction of the flame retardant system in the mixed solution is 10wt ~40wt%, the present invention finally obtains excellent mechanical properties and excellent flame retardant properties by adding a flame retardant system to the molding raw materials of the PMI foam material, which can be extinguished immediately (within 2s), and has a Very low smoke density and smoke toxicity, it is a low smoke, low toxicity and high flame retardant PMI foam material.

The invention relates to a low-temperature ceramic flame-retardant functional masterbatch, which comprises the following components by mass: 10-25 parts of silicone rubber, 5-15 parts of silicone resin, 2-6 parts of aluminum hypophosphite, and 2-10 parts of glass microspheres 2-8 parts of montmorillonite, 10-25 parts of natural bone powder, 25-50 parts of synthetic ceramic bone powder, 1-2 parts of coupling agent, 1-3 parts of lubricant and 1-3 parts of dispersing agent. The invention also relates to a method for preparing low-temperature ceramicized flame retardant functional masterbatch, which improves the dispersibility and increases the carbon formation rate, so that the carbon layer with a multi-dimensional stable structure has a high precipitation rate and integrity rate. The flame retardant masterbatch prepared by the invention can be ceramicized at low temperature when the material encounters flame attack, and can form a continuous and dense ceramic oxygen barrier layer, which has the characteristics of high efficiency and environmental protection.

The invention discloses a phenolic aldehyde foam board inner thermal insulation system for outer walls and a construction method thereof. The phenolic aldehyde foam board inner thermal insulation system for outer walls comprises a binder layer (7) coated on a foundation wall (1) of the outer wall, an integral skin phenolic aldehyde foam board (2) adhered to the binder layer (7), a plastering inner layer (3) adhered to one side of the integral skin phenolic aldehyde foam board (2), a piece of fiberglass mesh cloth (4) adhered to the outside of the plastering inner layer (3) and a plastering outer layer (5) adhered to the outside of the fiberglass mesh cloth (4). The phenolic aldehyde foam board inner thermal insulation system for outer walls disclosed by the invention has good thermal insulation performance, combustion performance up to a non-combustible grade, smoke toxicity up to standard safety grade, intensity up to or exceeding that of polystyrene inner thermal insulation board for outer walls (construction industry standard JG / T 159-2004 of inner thermal insulation board issued by Ministry of Housing and Urban-Rural Development of the People's Republic of China), as well as non-toxicity, good environmental performance, air permeability, no cracking, convenient material source, energy-saving construction and wide application.