50 results about "Polyisocyanurate" patented technology

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.

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.

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.

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.

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 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.

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 process for preparing a polyisocyanate composition comprising at least one polyisocyanates of the diphenylmethane series comprising providing a mixture (M1) comprising a polyamine composition (PA1) comprising di- and polyamines of the diphenylmethane series with a 2-ring content (2RC-1) and a mixture (M2) comprising a polyamine composition (PA2) comprising di- and polyamines of the diphenylmethane series with a 2-ring content (2RC-2); preparing a mixture (M3) from mixture (M1) and mixture (M2); and conversion of mixture (M3) to obtain mixture (M4) comprising a polyisocyanate composition; wherein the difference in the 2-ring content (2RC-1) of polyamine composition (PA1) and the 2-ring content (2RC-2) of polyamine composition (PA2) is more than 10 %. The present invention furthermore is directed to the isocyanate composition obtained or obtainable according to said process and the use thereof for the preparation of polyurethanes or polyisocyanurates.

Storage-stable two-component polyurethane or polyisocyanurate spray foam compositions are disclosed, said compositions comprising: (a) an A-side component comprising one or more polyisocyanate and one or more blowing agent; and (b) a B-side component comprising one or more polyol and one or more blowing agent comprising pressurized gaseous carbon dioxide and one or more liquid blowing agent; wherein both the A-side component and the B-side component, separately, generate less than 300 ppm of fluoride ion after one week of aging at 50° C.

The present invention is directed to a value chain return process for polyurethane and polyisocyanurate rigid foams containing at least one additive (A1) which is not chemically bonded to the polymer chain selected from the group consisting of phosphorous ester-based flame retardants, polymerization catalysts and surfactants comprising the steps of providing a composition comprising a comminuted polyurethane or polyisocyanurate rigid foam, wherein the comminuted foam has a content of intact cells of less than 10%, based on the number of intact cells of the not comminuted polyurethane or polyisocyanurate rigid foam, and extraction of the additive (A1) with a solvent at a temperature below 190° C.

The present invention relates to a process for depolymerization of polyisocyanurate, especially flexible and rigid polyisocyanurate foams, in which valuable raw materials of the polyisocyanurate can be recovered in high yields and good quality, allowing for the use of the recycled raw materials for production of new polyurethanes, preferably polyurethane foams, or polyisocyanurates, preferably polyisocyanurate foams.

The present invention relates to a process for the depolymerization of polyisocyanurates, in particular flexible and rigid polyisocyanurate foams, by which the valuable raw material of polyisocyanurates can be recovered in high yield and in good quality, i.e. in a quality that allows the use of the recycled raw material for the production of new polyurethanes, preferably polyurethane foams, or polyisocyanurates, preferably polyisocyanurate foams.

The utility model discloses a polyisocyanurate foaming box which comprises a lower box body, an inner box body and an upper box body, the inner box body is arranged on the upper end face of the lower box body, the lower box body and the inner box body are of an integrally-formed structure, the lower box body is located under the upper box body, the upper box body is arranged outside the inner box body in a sliding mode, and the lower box body is arranged on the upper end face of the inner box body. Supporting frames are vertically arranged on the outer walls of the two ends of the lower box body, connecting plates are fixedly connected to the upper end faces of the supporting frames, moving frames in sliding fit with the connecting plates are vertically arranged on the outer walls of the two ends of the upper box body, and a plurality of limiting grooves at equal intervals are formed in the outer wall of one side of each connecting plate in the radial direction. Through the unique matching structure of the movable frame and the connecting plate between the upper box body and the lower box body, the inner space can be flexibly adjusted, the use efficiency is improved, meanwhile, the transverse plates, the first sliding grooves, the matched limiting frames and the adjusting bolts are arranged on the upper portions of the outer walls of the two sides of the box body, the box cover is reliably fixed, accidental opening in the transportation process is prevented, operation is easy and convenient, and the cost is low. And the reliability and the convenience are both considered.

Rigid polyurethane or polyisocyanurate foams, polyester polyols used to produce them, and methods for formulating the foams are disclosed. The foams comprise a reaction product of a polyisocyanate, a polyester polyol, water, a surfactant, a catalyst and optional ingredients. The polyester polyols comprise a phthalimide-containing polyacid, a phthalimide-containing polyol, or a combination thereof. Rigid foams produced from the polyester polyols exhibit higher thermal stability and / or greater intumescence when compared with foams made from other polyester polyols. The phthalimide-containing polyester polyols should allow formulators to improve the flammability performance of rigid foams with reduced levels of flame retardants and / or lower index and should facilitate the production of thinner insulation panels.

The present invention relates to a process for producing rigid polyurethane foams or rigid polyisocyanurate foams, comprising the reaction of at least one polyisocyanate (A) and a specific polyol component, wherein the flame retardants used are selected such that the phosphorus content, based on the sum of the components used, is less than or equal to 1% by weight. The present invention further relates to the polyol component as described and to rigid polyurethane foams or rigid polyisocyanurate foams obtainable or obtained by a process of the invention, and to the use of a rigid polyurethane foam or rigid polyisocyanurate foam of the invention for production of sandwich elements.

The invention relates to a method for recycling waste containing polyurethane or polyisocyanurate, comprising the following steps: providing a composition (M1) comprising a comminuted polyurethane or polyisocyanurate material obtained from at least one polyester polyol (P1); depolymerizing the crushed polyurethane or the crushed polyisocyanurate; separating the amine component resulting from the depolymerization and the obtained polyol component or polyol fragment, resulting in an amine-rich phase as mixture (MA) and an amine-lean phase as mixture (MP); treating the amine-depleted phase to adjust the ratio of acids and polyols in the mixture (MP) to obtain a mixture (MP '); and treating the mixture (MP ') to effect condensation of the polyol and the acid in the mixture. The invention also relates to a method for producing polyester polyols, to polyol compositions obtained or obtainable according to the method according to the invention, and to the use of the polyol compositions for producing polyurethanes or polyisocyanurate.

The present invention relates to a process for the depolymerization of polyisocyanurates, in particular flexible and rigid polyisocyanurate foams, under mild conditions and low salt concentrations in the reaction mixture, which allows the valuable raw material of polyisocyanurates to be recovered in high yield and in good quality, i.e. in a quality that allows the use of the recycled raw material for the production of new polyurethanes, preferably polyurethane foams, or polyisocyanurates, preferably polyisocyanurate foams.

The present invention discloses a tertiary amine comprising cycloalkyl moiety catalyst system useful in the production of polyurethane and / or polyisocyanurate foams using hydrohaloolefin blowing agents and a catalyst system. In particular, disclosed is a polyol premix composition comprising the catalyst system, a polyol, and a hydrohaloolefin blowing agent, wherein the polyol premix may be used to produce a polyurethane and / or polyisocyanurate foam by combining the polyol premix with an isocyanate.