78 results about "Polyisocyanurate" patented technology

High impact and penetration resistant lightweight composite panels include a foam core and an impact and penetration resistant protective layer on at least a portion of the lightweight composite panel. The foam core is a polymer and / or inorganic foam layer or sheet having first and second surfaces. A fiber mesh reinforced cementitious layer can cover one or both surfaces of the foam core. Example polymer foam cores include extruded polystyrene foam, expanded polystyrene foam, polyisocyanurate foam, or polyurethane foam. Example inorganic foam cores include perlite, ceramic microspheres, hollow glass spheres, glass foam, ceramic foam, expanded silica gel, porous wollastonite, urea-silicate foam, SiOC / SiC foam, refractory foam, and graphene. The impact and penetration resistant protective layer can be formed from polyurea, polyurethane, polyurea-polyurethane hybrid, polyaspartic, polymer-modified mineral binder, or hybrid resin-mineral composite. The protective layer can include a tightly woven scrim and / or a slip resistant filler embedded in the polymer.

A polyisocyanurate insulation block assembly, including: (a) a foamed block of polyisocyanurate insulation; (b) a bottom facer underneath the foamed block of polyisocyanurate insulation; and (c) a top facer on top of the foamed block of polyisocyanurate insulation, wherein the top facer comprises an amorphous high performance plastic or a vulcanized fiber.

A method of forming spun fibers (e.g., glass fibers) having a more uniform or constrained fiber diameter and / or length distribution is disclosed. Spun fibers having improved property distributions across the fiber volume facilitate the formation of improved nonwoven fiber mats and products (e.g., coated glass facings) formed from the mats. The coated glass facings are suitable for use as facing materials, such as for gypsum or polyisocyanurate boards. Because the nonwoven mats are formed from a blend of smaller and larger fibers, and because the coating applied to the mats includes filler components having smaller and larger particle sizes, the faced wallboard can have improved air permeability properties, which allows for better prevention of leaks, blotching, and other visual defects.

A polyisocyanurate and / or polyurethane (PIR / PUR) comprising material having improved Flame. Smoke and / or Toxicity (FST) retardancy is disclosed and a method for forming said PIR / PUR comprising material. The PIR / PUR material is comprising at least 0.2 wt % of compounds having a number average equivalent weight<160 g / mol and at least one non-polymerized ethylenically unsaturated moiety based on the total weight of the PIR / PUR comprising material, and optionally 0.01 wt % up to 1 wt % of one or more radical initiator compounds based on the total weight of the PIR / PUR comprising material.

Processes, foams, foamable compositions, and blowing agents related to thermoset polymer foam compositions comprising an active hydrogen-containing compound; and a blowing agent comprising HFO-1252zc and optionally HFC-152a.

Reacting a waste polymeric product comprising a thermoset having urethane bonds, urea bonds, and / or isocyanurate bonds, a polycarboxylic acid or an anhydride thereof, a first polyether polyol having an average of from 1.8 to 7 hydroxyl groups per molecule and having a number average molecular weight of greater than 350 grams / mole, a second polyether polyol having a number average molecular weight of no greater than 350 grams / mole wherein at least 50 percent of the hydroxyl groups in the second polyether polyol are secondary alcohol can form a reaction product composition directly useful in forming new polyurethane materials.

The invention relates to a process for preparing an alkoxylated product. The aim of the invention is to provide aromatic polyols for preparing polyurethane-based and polyisocyanurate-based polymers, which ensure good miscibility with the isocyanate component and other components, have a good storage stability and render the end product flameproof. For this purpose, the invention devises a process for preparing an alkoxylated product by reacting bisphenol F with propylene carbonate and / or propylene oxide as propoxylation agent and ethylene carbonate and / or ethylene oxide as ethoxylation agent, the propoxylation agent and the ethoxylation agent being used in a molar ration of 70:30 to 45:55.

Silicone-(meth)acrylate-polyether copolymers contain a linear siloxane skeleton having a pendant (meth)acrylate-polyether moiety. The siloxane skeleton is composed of a silicone moiety having a silicon-bonded mercaptoalkyl linker (the alkyl group in the linker is bonded to the silicon atom in the silicone moiety). The pendant (meth)acrylate-polyether moiety is covalently bonded to the sulfur atom in the mercaptoalkyl linker. The pendant (meth)acrylate-polyether moiety contains (meth)acrylate-poly(alkylene glycol) units. Silicone-(meth)acrylate-polyether copolymers are useful as surfactants in polyurethane foam formulations and polyisocyanurate foam formulations.

The present invention relates to the use of polyisocyanate compositions and trimerization catalysts for production of coatings by reaction injection molding. The present disclosure also describes the coatings obtained by the use. The correspondingly coated workpieces are also described in this disclosure. A method for coating workpieces by reaction injection molding is also described herein.

The present invention is directed to a novel polyisocyanate production process resulting in reduced coloration of the final product with high purity. The process involves the trimerization of hexamethylene diisocyanate (HDI) using a trimerization catalyst and in the presence of a liquid phosphite additive.

A process depolymerizes polyisocyanurate under mild conditions and low salt concentration in the reaction mixture, wherein valuable raw materials of the polyisocyanurate can be recovered in high yields and good quality, i.e. a quality allowing usage of the recycled raw materials for production of new polyurethanes, preferably polyurethane foam, or polyisocyanurates, preferably polyisocyanurate foams.

Disclosed is a method for producing a molded polyurethane-polyisocyanurate-fiber composite part, the method comprising obtaining a reaction mixture by mixing: (A) an isocyanate-reactive component comprising: a polyol having an average functionality of 1.8 to 5.0 and a hydroxyl number of 200 to 500; and an alkali metal catalyst obtainable by introducing an alkali metal salt or an alkaline earth metal salt into a carbamate group-containing compound R-NH-CO-R ', where R is not hydrogen and / or is not COR' '; and (B) an isocyanate component comprising: at least one isocyanate compound, and a compound comprising one or more epoxy groups; and molding the reaction mixture at a temperature between 75 DEG C and 220 DEG C, at a pressure of 50 bar or more, to obtain the molded polyurethane-polyisocyanurate-fiber composite part.

The present invention relates to a process for recycling one or more polymers selected from the group consisting of polyurethanes, polyurethane ureas, polyisocyanurates, and a mixture of two or more thereof, said one or more polymers being contained in a solid material W.

The present invention relates to a continuous manufacturing technology for PIR (Polyisocyanurate) foam or PUR (Polyurethane) foam. More specifically, the invention relates to a continuous manufacturing method for PIR foam or PUR foam and a PIR foam manufactured thereby, which can prevent the problem of adhesive applied to the lower perforated nonwoven sheet leaking outward through the perforations and transferring to the steel plate portion of the manufacturing equipment in a double belt line process for continuously foaming PIR foam or PUR foam using an upper perforated nonwoven sheet and a lower perforated nonwoven sheet, and the PIR foam or PUR foam manufactured thereby.

The present invention relates to a process for preparing a rigid polyisocyanurate foam comprising the reaction of a composition (A) including a polyesterol, a foaming agent comprising formic acid, a catalytic system comprising at least one trimerization catalyst, and at least one polyisocyanate as component (B), wherein composition (A) further comprises at least one polyether alcohol prepared by the addition of alkylene oxides to toluenediamine. The present invention also relates to a rigid polyisocyanurate foam obtained or obtainable by the process of the present invention and to the use of said rigid polyisocyanurate foam as an insulating material.

The present invention relates to a process for recycling a waste material (W) containing at least one polymer (P1), the process comprising a pyrolysis step or a gasification step, wherein the nitrogen content in the waste material (W) is reduced prior to the pyrolysis, steam reforming or gasification step by a treatment step which preferably comprises hydrolysis and separation of one or more nitrogen containing components (C-N) formed. Furthermore, the present invention relates to the products obtained in said process, such as for example isocyanates or polyols, and the use of the products obtained in the thermal decomposition according to the present invention for the preparation of polyamides, polyurethanes or polyisocyanurates, as a naphtha substitute in steam crackers or in the production of synthesis gas.

A method for depolymerizing rigid polymeric polyurethane (PUR) or polyisocyanurate (PIR) foams involves grinding the foams to form a powder, adding the powder to liquid aliphatic amines to obtain a reaction mixture, and performing an aminolysis reaction on the reaction mixture under an inert atmosphere at elevated temperatures and extended incubation times. The process allows for the recovery of polymeric methylene diphenyl diisocyanate (PMDA) in high purity and high yields from the depolymerized foams. The method also includes recovering PMDA by precipitation and using it as a precursor to obtain polymeric methylene diisocyanate (PMDI) for the synthesis of PUR and PIR foams.

The present invention provides a thermosetting resin composition for intermediate materials that can produce fiber-reinforced plastics with excellent heat resistance and mechanical properties. [Solution] A thermosetting resin composition for an intermediate substrate, comprising a urethane (meth)acrylate (X) and a polymerizable monomer (Y), wherein the urethane (meth)acrylate (X) has structural units derived from a polyfunctional isocyanate (A) having a trimerized isocyanurate ring of a bifunctional isocyanate compound, structural units derived from an alcohol compound (B1) having two or more (meth)acrylic groups, and structural units derived from an alcohol compound (B2) having one (meth)acrylic group, and the acrylic equivalent of the urethane (meth)acrylate (X) is 340 to 470 g / eq.

The invention relates to potting compounds which cure to polyisocyanurate plastics, to the production of said potting compounds and to the use of the potting compounds for manufacturing electrical components.

The present invention relates to a method for producing a rigid foamed polyisocyanurate material, comprising: (a) an aromatic polyisocyanate; (b) at least one polyether ester polyol (b1) having an average functional value of 1.7 or more and 2.8 or less and an OH value of 170 KOH / g or more and 270 mg KOH / g or less; and a polyether ester polyol (b1) having a functional value of 1.7 or more and 2.7 or less and 170 mg KOH / g or more and 280 mg A reaction mixture is formed by mixing (c) a catalyst, (d) a blowing agent, (e) a flame retardant, and (f) optionally auxiliary agents and additives, comprising (b1) a polyether ester polyol (b1) comprising (b1.1) a dicarboxylic acid composition containing an aromatic dicarboxylic acid, (b1.2) one or more hydrophobic compounds or derivatives having at least one hydroxyl group and / or carboxyl group, (b1.3) one or more diols having 2 to 6 C atoms, and (b1.4) an average functional value of 2 to 4. The present invention relates to a method for producing a polyester polyol (b2) obtained by esterification of a polyether polyol produced by alkoxylation of an initiator or initiator mixture, wherein polyethylene terephthalate is used in the production of polyester polyol (b2) in proportion to more than 25% by weight of the total amount of all components used in the production of polyester polyol (b2), the mass ratio of polyether ester polyol (b1) to polyester polyol (b2) is 0.3 or more and 3.0 or less, the sum of the mass fractions of component (b1) and component (b2) is more than 80% by weight of component (b), the mass fraction of free monoethylene glycol is 1.4% by weight or less of the sum of components B, C, E and F, and the mixing for forming the reaction mixture is carried out at an isocyanate index of at least 180. The present invention further relates to a polyol component for producing a polyisocyanurate rigid foam material according to the present invention and a sandwich element comprising a polyisocyanurate rigid foam material obtained by the method according to the present invention, in particular a polyisocyanurate rigid foam material.

The utility model relates to the technical field of cold storage thermal insulation walls, and discloses a cold storage thermal insulation wall which comprises a wall body, an outer protection layer is arranged on the front face of the wall body, the outer protection layer comprises a plurality of galvanized plates arranged at equal intervals, a closed cavity is formed between the wall body and the outer protection layer, and the closed cavity is filled with a thermal insulation core material. According to the heat preservation wall body for the refrigeration house, the outer protection layer composed of galvanized sheets is arranged, and the heat preservation core material made of modified polyisocyanurate rigid foam materials is filled between the wall body and the protection layer, so that the heat preservation efficiency and stability of the heat preservation wall body can be remarkably improved, the moisture-proof and mildew-proof performance of the heat preservation wall body is enhanced, the service life of the heat preservation wall body is prolonged, and the energy efficiency performance of the heat preservation wall body is optimized; according to the thermal insulation wall, the thermal insulation requirement of the wall body in an extremely severe environment is met, the surrounding plates and the butt joint grooves are arranged, the adjacent surrounding plates are connected and reinforced through the studs and the first nuts, the overall stability of the outer protection layer can be improved, and then the overall stability of the thermal insulation wall is improved.

This technology relates to a polyol blend comprising three (3) different polyols and one chain-extending polyol. This blend is used to prepare polyurethane / polyisocyanurate (PUR / PIR) foam when the blend is reacted with at least one polyisocyanate compound in the presence of catalysts, blowing agents, and possibly other additives. This technology therefore also relates to a PUR / PIR foam composition, the resulting foam, and its production process. The PUR / PIR foam exhibits interesting physical characteristics and properties, particularly in terms of density, mechanical strength, and thermal conductivity.

The present invention relates to a value chain return method for polyurethane and polyisocyanurate rigid foams containing at least one additive (A1) that is not chemically bonded to the polymer chain, selected from the group consisting of phosphite flame retardants, polymerization catalysts, and surfactants, the method comprising the steps of: preparing a composition comprising ground polyurethane or polyisocyanurate rigid foam, wherein the ground foam has a content of intact cells of less than 10% based on the number of intact cells in the unground polyurethane or polyisocyanurate rigid foam; and extracting the additive (A1) with a solvent at a temperature below 190°C.

The invention relates to the field of high polymer materials, and discloses an acrylate double-monomer grafted modified high-temperature-resistant PBS-based degradable material and application thereof.The two specific acrylate monomers are reacted, extruded and grafted in a PBS matrix, one of the monomers forms a polyisocyanurate (PIR) enhanced network in situ, and the other monomer forms a high-temperature-resistant PBS-based degradable material; the other monomer improves interface bonding, and the two monomers cooperatively construct a core-shell type reinforcing structure. The modified material has the beneficial effects that the heat resistance and mechanical strength of PBS are remarkably improved, meanwhile, good processing performance and biodegradation potential are expected to be kept, and the application field of a PBS-based degradable material is effectively expanded.

The invention provides a polyisocyanate composition and a preparation method thereof. The composition comprises a mixture of the following components. > = 50% by weight, based on the total weight of the mixture, of at least one polyisocyanurate based on pentamethylene diisocyanate and < = 50% by weight, based on the total weight of the mixture, of at least one polyisocyanate based on hexamethylene diisocyanate and / or of at least one polyisocyanurate based on pentamethylene diisocyanate and hexamethylene diisocyanate a polyisocyanate of an ester, wherein the polyisocyanate composition has a residual monomer content of the monomeric diisocyanate of less than 0.1 wt% based on the total weight of the polyisocyanate composition. According to the solvent-free polyisocyanate composition containing the low-viscosity HDI polyisocyanate and the low-monomer-amount polyisocyanurate based on pentamethylene diisocyanate, the viscosity of the polyisocyanate composition can be improved, the solvent-free polyisocyanate composition has more balanced and excellent solvent wiping resistance and drying performance, and meanwhile, the compatibility is improved.

The utility model discloses a pipeline nuclear grade PIR hard foam heat insulation layer which comprises a pipeline body and further comprises a hard foam heat insulation shell installed outside the pipeline body, the outer wall of the hard foam heat insulation shell is wrapped with a waterproof film, the outer wall of the waterproof film is sleeved with a protection shell, and a plurality of arc-shaped plates distributed at equal intervals are installed on the outer wall of the protection shell. According to the pipeline nuclear grade PIR hard foam heat insulation layer, the hard foam heat insulation shell can be physically waterproof and protected through the waterproof film and the protection shell, impact borne by the protection shell can be buffered through the buffering assembly, and meanwhile when the impact force is large and the deformation limit of the buffering assembly is reached, the protection shell can be prevented from being damaged. When the protective shell is collided, a pressure sensor in the buffer assembly is pressed, the pressure sensor transmits a signal to a controller, and the controller transmits the signal to an external receiver, so that a maintainer can know that the protective shell is collided severely at the first time, and overhaul and check conditions in time are facilitated.

To provide a mixture containing a hydrofluorocarbon, a fluoroolefin, an iodide-containing compound and other fluorinated compounds, which has a low ozone depletion potential and a low global warming potential.SOLUTION: Provided are blowing agents for polyurethane and polyisocyanurate foams comprising Z-1-chloro - 2333 - tetrafluoropentene (HCFO - 1224yd (Z)) and cyclopentane in amounts of 65 wt% to 99 wt% and 1 wt% to 35 wt%, respectively. There is further provided a foam formed from a polyurethane or polyisocyanurate foam and a blowing agent comprising Z-l-chloro - 2333 - tetrafluoropentene (HCFO - 1224yd (Z)) and cyclopentane having a low initial lambda value.SELECTED DRAWING: Figure 1

The present invention relates to a method for obtaining a recycled polyol (RP) from a polyisocyanurate material (a) wherein the polyisocyanurate material (a) comprises isocyanurate structures wherein the method comprises mixing (a) the polyisocyanurate material, (b) at least one polyalcohol, wherein the polyalcohol (b) has at least two primary alcohol groups and a hydroxyl value of 200 to 800 mg KOH / g, (c) at least one aliphatic monocarboxylic acid, (d) at least one catalyst comprising at least one basic catalyst (d1) catalyzing esterification of alcohol groups and carboxylic acids and (e) optionally at least one deamination agent and reacting the mixture to obtain a recycled polyol having an OH-number of 150 to 300 mg KOH / g, a viscosity of less than 25.000 mPas at 25 °C a and a content of polyisocyanurate material (a), based on the total amount of compounds (a) to (e), of at least 20 % by weight. The invention is further directed to a recycled polyol obtainable according to such a method and a process for the production of a polyisocyanurate rigid foam.

A composite insulation assembly, including: (a) a bottom insulation layer, (b) a fiber supported aerogel blanket on top of the bottom insulation layer; and (c) a top insulation layer.