111 results about "Polyisocyanurate" patented technology

The present invention relates to a process for the production of a rigid polyurethane foam or rigid polyisocyanurate foam, comprising the reaction of at least one polyisocyanate and of a polyol composition (PZ), where the polyol composition (PZ) comprises at least one compound having at least two hydrogen atoms reactive toward isocyanate groups and at least one compound (I) selected from the group consisting of dicarboxylic diesters of dicarboxylic acids having from 2 to 18 C atoms and tricarboxylic triesters of tricarboxylic acids having from 3 to 18 C atoms, where at least one blowing agent is used during the reaction. The present invention further relates to rigid polyurethane foams or rigid polyisocyanurate foams obtainable or obtained by such a process, and also to a polyol composition (PZ) at least comprising one compound having at least two hydrogen atoms reactive toward isocyanate groups and at least one compound (I) selected from the group consisting of dicarboxylic diesters of dicarboxylic acids having from 2 to 18 C atoms and tricarboxylic triesters of tricarboxylic acids having from 3 to 18 C atoms. The present invention also relates to the use of such a polyol composition (PZ) for the production of rigid polyurethane foams or rigid polyisocyanurate foams, and also to the use of a rigid polyurethane foam or rigid polyisocyanurate foam of the invention as, or for the production of, insulation materials, preferably insulation sheets, sandwich elements, hot-water tanks, boilers, coolers, insulation foams, refrigerators or freezers.

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.

The utility model discloses a fluoride-free modified polyisocyanurate foam plastic board, relates to the technical field of foam plastic boards, and aims to provide a polyisocyanurate foam plastic board which is convenient to splice and better in strength, and comprises a board body, a reinforcing component is arranged on the board body, and a connecting component is arranged at the top of the board body. The connecting assembly comprises two protruding blocks, a positioning block, two rubber sleeves and two inserting rods, the positioning block and the two protruding blocks are fixed to the bottom of the plate body, and grooves corresponding to the positioning block and the protruding blocks are formed in the bottom end of the plate body. Two plates are conveniently spliced through the grooves and the convex blocks and are fixedly connected through the insertion rods, glue is not needed for pasting, and the connection stability is higher; the reinforcing plate is mounted in the plate body, so that the supporting strength of the polyisocyanurate foam plastic plate is greatly enhanced, the probability of deformation or breakage of the foam plastic plate is reduced, and the service life of the foam plastic plate is prolonged.

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.

Method for recycling a polymer material being selected from the group consisting of polyurethanes, polyurethane ureas, polyisocyanurates, and a mixture of two or more thereof, the method comprising the steps of: (a) providing a scrap material obtained by shredding a vehicle and / or shredding a vehicle and obtaining a scrap material, the scrap material comprising one or more foam pieces made from the polymer material; (b) performing a first sorting step for selecting, from the scrap material, target foam pieces that comprise the polymer material; (c) subjecting the target foam pieces to a mechanical treatment to obtain target foam flakes with a maximum dimension smaller than 120 mm, wherein the first sorting step comprises a sorting step using one or more of optical sorting methods to sort target foam pieces based on the type of isocyanate and / or the type of polyol used to produce the target foam pieces.

The invention relates to a degradation method and a recycling method of waste polyisocyanurate, and the degradation method is as follows: aliphatic amine and basic hydroxide are used as degradation agents, and degradation is carried out under the synergistic effect of the aliphatic amine and the basic hydroxide. The recycling method comprises the following steps: mixing a product B obtained by degradation with an organic compound, and introducing gas generated by reaction of activated carbon and chlorine to obtain a product C; fully mixing and stirring a foaming agent, a catalyst, a foam stabilizer and the degraded product A to obtain a component A; and stirring the component A and the product C, and pouring into a foaming mold for foaming to prepare the flame-retardant foam. According to the method disclosed by the invention, the waste polyisocyanurate material can be efficiently degraded and recycled.

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 invention provides a polyisocyanurate pipeline with a performance maintaining structure, and relates to the technical field of heat preservation pipelines, the polyisocyanurate pipeline comprises a base pipeline, the main body of the base pipeline is of a semicircular cylindrical structure, the inner edges of the two ends of the base pipeline integrally extend outwards to be provided with surrounding flanges, the section of each surrounding flange is in an L shape, and the section of each surrounding flange is in an L shape; the outer portion of the surrounding type flange is narrower than the outer arc face of the base pipeline. The main body of the outer base pipeline is also of a semicircular cylindrical structure, and L-shaped annular assembly grooves are formed in the inner walls of the two sides of the outer base pipeline; the structure is stable and reliable, through combined fixing of the rotary buckles, the arc-shaped curved bars and the connecting hoops and the anti-loosening design of springs and double nuts in the bolt sets, a stable connecting structure is formed by the bottom base pipeline, the outer base pipeline and an existing pipeline, and the situation that the pipelines are loosened and fall off after being installed is effectively prevented; and an adaptive pipeline is further arranged, so that the bent part of the pipeline can be fixed and protected.

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.

The invention relates to a modified polymer polyol and a preparation method thereof. Since the modified polymer polyol of the present invention can be used to prepare polyurethane foams and polyisocyanurate foams, the present invention also relates to polyurethane foams exhibiting improvements in porosity and wet compressive deformation; and a polyisocyanurate foam exhibiting an improvement in fire reaction.

A polyisocyanurate foam insulation product is produced from an isocyanate component and a first component. The first component includes one or more polyester polyols, a fire retardant, and a multi-functional alcohol. The multi-functional alcohol is present in an amount of greater than 20 parts per 100 parts of polyester polyol The polyisocyanurate foam insulation product may have an R-value per inch of at least 6.5 when measured at 40° F. and may have an R-value per inch of at least 6.2 when measured at 25° F.

A process for producing a polyurethane or polyisocyanurate construction board, the process comprising (i) providing an A-side reactant stream that includes an isocyanate-containing compound; (ii) providing a B-side reactant stream that includes a polyol, where the B-side reactant stream includes a fluorinated additive and a blowing agent that includes a pentane and a blowing agent additive that has a Hansen Solubility Parameter (St) that is greater than 17 MPa−0.5; and (iii) mixing the A-side reactant stream with the B-side reactant stream to produce a reaction mixture.

The present invention provides an isocyanate-reactive composition comprising (i) at least one isocyanate-reactive compound; and (ii) a predetermined amount of at least one T-shaped silicone material; and a foam-forming composition for preparing a polyurethane or polyisocyanurate foam, the foam-forming composition comprising at least one isocyanate component and at least one isocyanate-reactive component; wherein the at least one isocyanate-reactive component is the isocyanate-reactive composition described above.

The present invention relates to isocyanate-reactive and isocyanate-terminated phosphoalkylcarboxamides as novel monomers and prepolymers for the production of plastics, which can be used, for example, for the production of polyurethanes or polyurethane / polyisocyanurate polymers.

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.