Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/30—Low-molecular-weight compounds
  • C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
  • C08G18/3893—Low-molecular-weight compounds having heteroatoms other than oxygen containing silicon
  • C08G18/3895—Inorganic compounds, e.g. aqueous alkalimetalsilicate solutions; Organic derivatives thereof containing no direct silicon-carbon bonds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/04—Polymeric products of isocyanates or isothiocyanates with vinyl compounds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G2110/00—Foam properties
  • C08G2110/0008—Foam properties flexible
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G2110/00—Foam properties
  • C08G2110/0025—Foam properties rigid

Definitions

• This invention relates to a process for the production of poly (polyisocyanate alkali metal) prepolymer by reacting a poly- isocyanate chemically with an alkali metal silicate by mixing them and then heating the mixture thereby producing a poly (polyisocyanate alkali metal) prepolymer.
• the poly (poly ⁇ isocyanate alkali metal silicate) prepolymer is cured with heat or a curing catalyst such as water.
• This invention relates to a process for the producing of poly (polyisocyanate silicate) solid or cellular solid by reacting a polyurethane compound with an alkali metal silicate to pro ⁇ consider a poly (polyisocyanate alkali metal silicate) prepolymer.
• the prepolymer may be cured by heating or adding a curing agent.
• the products produced by this process may be quite varied in physical properties; they may be solid or porous, rigid or elastomeric, and the porous products may be rigid or soft and flexible.
• the products produced by this invention may be utilized as thermal insulating material, noise insulating material, flotation material in boats, shock-resistant packaging, cushions, as fiber, as coating agents, as fillers, as impregnating agents, as adhesives, as casting material, as putty material, as construc ⁇ tional components of a building, etc.
• the products have improved heat and flame resistant properties.
• the products are novel and economical. Some of the products have a number of woodlike physical properties-
• alkali metal silicates and mono-alkali metal silicates were listed in U.S. Patent Application No. 71,628 filed September 11, 1970, by David H. Blount, now abandoned.
• the alkali metal silicates, mono-alkali metal silicates a mixtures thereof, may be produced by any of the methods common known in the arts.
• a useful mixture which contains alkali met silicate and predominately mono-alkali metal silica may be produced by heating 1 to 2 mols of an alkali metal hydroxide w about 1 mol of fine granular silica in water at 80 to 100 C, while agitating at ambient pressure for 20 to 60 minutes until the water evaporates.
• Mono-alkali metal silicate may also be produced by heating 1 mol of hydrated silica with 1 mol of alk metal hydroxide compound in water until the water is evaporate It is preferred that the alkali metal silicate be in a granula form.
• the poly (polyisocyanate silicate) solid or cellular soli products may be modified or improved by adding organic compoun inorganic compounds, and/or organic-silicate compounds. These compounds may be added before the isocyanate and the alkali si cate are reacted together or they may be added after a poly (polyisocyanate silicate) prepolymer is produced.
• Organic poly polyesters, polyether glycols and polysulfides, polybutadiene, butadiene-styrene copolymers and butadieneacrylonitrile which contain free hydroxyl groups may be used in this invention.
• alkali metal silicate compounds may be used in this invention such as sodium, potassium and lithium silicates.
• Other alkali metal silicates may be used.
• Sodium silicate and mono-sodium silicate are preferred alkali metal silicates beca of their low cost and ready availability. The cost is further lowered by using a considerable amount of water as a curing catalyst which is utilized in the product.
• the crude commerci alkali metal silicates may contain other substances such as calcium silicate, magnesium silicate, aluminates or borates may also be used.
• arylene polyisocyanates such as tolylene, meta- phenylene, 4-chlorophenylene-l, 3-, methylene-bis (phenylene-4-) , biphenylene-4,4'-, 3,3'-dimethoxy-biphenylene-4,4'-, 3,3'- diphenylbiphenylene-4,4'-, napthalene-1,5-, and tetrahydron- aphthalene-1, 5-diisocyanates and triphenylmethane tri- isocyanate, alkylene polyisocyanates such as ethylene, ethylidene, propylene-1, 2- , butylene-1,4-, butylene-1,3-, hexylene-1,6-, decamethylene-1,10-, cyclohexylene-1,2-, cyclohexylene-1,4-, and methylene-
• Phosgenation products of aniline-formaldehyde condensation may be used.
• Polyisothiocyanates, inorganic polyisothiocyanates, polyisocyanates which contain carbodi- imide groups as described in German Patent No. 1,092,007 and polyisocyanates which contain urethane groups, allophanate groups, isocyanurate groups, urea groups, imide groups or biuret groups may be used to produce poly (polyisocyanate silicate) solid or cellular solid. Mixtures of the above mentioned poly ⁇ isocyanates may be used.
• polyisocyanates such as toluene-2,4- and -2,6, diisocyanate and any mixture of these isomers (“TDI”) , (“crude MDI”) , polyphenyl-polymethylene-isocyanates obtained by anilineformal- dehyde condensation followed by phosgenation, and modified polyisicyanates which contain carbodiimide groups, urethane groups, allophanate groups, isocyanurate groups, urea groups, imide groups or biuret groups.
• TDI toluene-2,4- and -2,6, diisocyanate and any mixture of these isomers
• CAMDI polyphenyl-polymethylene-isocyanates obtained by anilineformal- dehyde condensation followed by phosgenation
• modified polyisicyanates which contain carbodiimide groups, urethane groups, allophanate groups, isocyanurate groups, urea groups, imide groups or biuret groups.
• the alkali metal silicate and/or mono-alkali metal silicate in the amount of 0.1 mol to 2 mols may react with 1 mol of the polyisocyanate compound by mixing at ambient tempera ⁇ ture to 45 C. , preferably to 30° to 40° C. , while agitating for 10 to 30 minutes, thereby producing yellow granules of a poly (polyisocyanate alkali metal silicate) prepolymer.
• the prepolymer may be cured by heating above 50 C. or by adding a curing agent such as water, and a solid or cellular solid product is produced.
• polyols may be added to the alkali metal silicate before the polyisocyanate is added or after the poly (polyisocyanate alkali silicate) prepolymer is produced- Any suitable polyol may be used in this invention such as glycerol glycerol monochlorohydrin, ethylene glycol, propylene glycol, butylene glycol, trimethylene glycol, tetramethylene glycol, pentamethylene glycol, hexamethylene glycol, diethylene glycol triethylene glycol, dipropylene glycol, tetraethylene glycol, polyethylene glycol, polypropylene glycol, ether glycols, bispherol A, resorcinol, bis(bet -hydroxyethyl) terephthalate, 2-ethyl-2-(hydroxy ethyl)-1,3-propanediol, pentaerythritol, trimethol propane; trimethol ethane, 2,2-os
• polyesters containing free hydroxyl or carboxyl end groups may be used.
• Polyesters of lactones, such as E-caprolactone, polyesters of hydroxycarboxylic acids, such as W-hydroxy-caproic acid may be used.
• the hydroxyl group containing polyesters may be produced by reacting polyhydrix alcohols, preferably dihydric alcohols with addition of trihydric alcohols as desired, and polybasic carboxylic acids wuth dibasic carboxylic acids being preferred.
• the corres ⁇ ponding polycarboxylic acid anhydrides or corresponding polycarboxylic acid esters of lower alcohols or their mixtures may be used for preparing the polyesters in place of or com ⁇ bined with the free polycarboxylic acids.
• the polycarboxylic acids may be aliphatic, cycloalipathic, aromatic and/or heterocyclic and may be substituted, e.g., with halogen atoms, and may be unsaturated. Any suitable compound such as adipic acid, azaleic acid, succinic acid, suberic acid, sebaci acid, phthalic acid, isophthalic acid, trimellitic acid, maleic acid, fumaric acid, dimeric and trimeric fatty acids
• polyesters such as oleic acid mixed with monomeric fatty acids
• phthalic acid anhydride tetrahydrophthalic acid anhydride, tetrach- lorophthalic acid anhydride, hexahydrophthalic acid anhydride, endomethylene tetrahydrophthalic acid anhydride, maleic acid anhydride, glutaric acid anhydride, bis-glycol terephthalate, dimethylterephthalate and mixtures thereof
• polyesters is commonly known in the arts.
• the polyesters with 2 to 8 hydroxyl groups may be prepared by the polymerization of epoxides such as ethylene oxide,pro- pylene oxide, butylene oxide, tetrahydrofuran. styrene oxide or epichlorohydrin, each with itself or by addition of these epo- xides or mixtures thereof with alcohols or amines.
• epoxides such as ethylene oxide,pro- pylene oxide, butylene oxide, tetrahydrofuran.
• styrene oxide or epichlorohydrin each with itself or by addition of these epo- xides or mixtures thereof with alcohols or amines.
• Polyethers may be modified with vinyl polymers such as styrene or acrylo- nitrile.
• polyacetals, polythioethers, polyester amides, polyamides, polyhydroxyl compounds which already contain urethane or urea groups, modified or unmodified natural polyols, addi ⁇ tion products of a ⁇ kylene oxides with phenolformaldehyde resisn or with urea-formaldehyde resins may be used in this invention and added with the alkali metal silicates or after the poly (polyisocyanate alkali metal silicate) prepolymer is produced.
• These polymers may be added in the amount from 0% to 100% -by weight, based on the weight of polyisocyanate.
• the preferred methods to produce poly (polyisocyanate silicate) solid or cellular solid products is to mix about 1 part by weight of a fine granular alkali metal silicate with 0.5 to 6 parts by weight of a polyisocyanate or polyisothiocyanate. Then heat the mixture to 30° to 40° C while agitating at ambient pressure, for 10 to 30 minutes, thereby producing yellow gran ⁇ ules of poly (polyisocyanate alkali metal silicate) prepolymer.
• the prepolymer is heated to 50° to while agitating at ambient pressures and it begins to expand immediately to about 3 to- 12 times its original volume to prod a rigid, self-standing poly (polyisocyanate silicate) cellular solid.
• a curing agent may be added to the poly (polyisocyanate alkali metal silicate) prepolymer in the amount of 0.001 to 10% by weight, based on the reactants, instead of heating.
• the curing agent is thoroughly mixed with the prepolymer, then it rapidly expands 3 to 12 times its original volume to produc a rigid, self-standing poly (polyisocyanate silicate) cellular solid.
• a fine granular alkali metal silicate and 0.5 to 6 parts by weight of a polyisocyanate are mixed then heated to 50 to 80 C whil agitating at ambient pressure.
• the mixture begins to expand when the temperature reached 50 to 80 C and it expands 3 to 12 times its original volume to produce a rigid, self-standing poly (polyisocyanate silicate) cellular solid product.
• a curing agent is added to the mixture of alkali metal silicate and polyisocyanate. Then, the mixture is agitated at ambient pressure. In a few minutes (1 to 15 minutes) the mixture expands 3 to 12 times its origin volume to produce a poly (polyisocyanate silicate) cellular solid or is cured into a solid product.
• Polyols in the amount of 0.1 to 3 parts by weight may be reacted chemically with 1.5 to 7 parts by weight of poly (polyisocyanate alkali metal silicate) prepolymer to produce poly (urethane silicate) solid or cellular solid products.
• the polyols may also be mixed with the alkali metal silicate and polyisocyanate simultaneously to produce poly (urethane silicate solid or cellular solid products.
• Suitable vinyl monomers may be chemically reacted with the poly (polyisocyanate alkali metal silicate) prepolyme alkali metal silicate and polyisocyanate mixture, alkali metal silicate, listed organic compound and polyisocyanate mixture or alkali metal silicate, polyol and polyisocyanate mixture to produce poly (urethane silicate) solid or cellular solid products.
• vinyl monomers such as acrylonitrile, vinyl acetate, styrene, methyl styrene, 1,1'_ dichloroethylene, n-vinyl-2-pryrollidone, vinyl toulenes, n-vinyl carbazone, 2-vinyl pyridine, 4-vinyl prydine, vinyl alkyl ethers, allyl vinyl ethers, alicyclic ethers, aryl alkyl vinyl ethers, aryl vinyl ethers, divinyl benzene acrylic acid, hydroacrylic acid, methacrylic acid, ethyl acrylic acid, crotnoic acid, chloracrylic acid, fluoroacrylic acid, cyclo- hexyl methacrylic acid, isobutyl methacrylic acid, bromoacrylic acid, benzyl acrylic acid, methyl methacrylate, propyl acrylate, butyl acrylic acid, propyl acrylate, but
• Suitable allyl type halides may be chemically reacted with the poly (polyisocyanate alkali metal silicate) prepolymer, a mixture of alkali metal silicate and polyisocyanate or a mixture of alkali metal silicate, polyolcate and poly ⁇ isocyanate to produce poly (urethane silicate) solid or cellular solid products.
• R is a hydrogen or a C, to C alkyl group and X is chlorine or bromine.
• allyl type halides are such compounds as allyl chloride, allyl bromide, crotyl chloride, crotyl iodine, beta- ethylallyl chloride, beta-methylallyl bro ⁇ mide, methyl vinyl carbinyl chloride, methyl vinyl carbinyl fluoride, alpha-dimethyl-allyl chloride, beta-cyclohexylallyl chloride, cinnamyl chloride, beta-ethylcrotyl chloride, betaphenyl allyl bromide, alpha-dicyclohexylallyl chloride, beta-propyallyl iodide, beta-phenylallyl chloride, beta- cyclohexylallyl fluoride, 2-chloromethyl butane-1, 2-chloro ⁇ methyl pentene-1, 2-chloromethyl hexene-1, and mixtures thereo
• Plasticizers, fillers, curing rate modifiers, pigments; extenders and the like may be added to the mixtures in this invention or may be added to the prepolymers at the time of curing and may be in the amount from 5% to 50% by weight, base on the weight of the prepolymer or mixture.
• Plasticizers may include benzoate esters, dipropylene glycol benzoate, dodecyl phthlate and propylene glycol phthalate. Extenders such as high boiling coal tar distillates, mineral oil, poly (alpha- methylstyrene) polymers, mercapto-terminated liquid polysulfid polymers, paraffin oil and sulphonated castor oil may be used.
• Finely divided fillers such as alkali metal silicates, ammoniu silicate, metal oxides, metal hydroxides, metal carbonates, chalk, heavy spar, gypsum, anhydrite, and mixtures thereof may be used in this instant invention.
• blowing agents are liquids with boiling points, rangin from -25 to 80 C. and preferably from -15 to 40 C.
• the organic blowing agents are used in quantities of from 2% to 30% by weight, based on the reaction mixture.
• the organic blowing agents such as acetone, ethyl acetate, halogenated alkanes, e.g.
• catalysts may be utilized as the catalyst to produce foam products from the poly (polyisocyanate alkali metal silicate) prepolymers, and alkali metal silicate and polyisocyanate mixtures.
• These catalysts are commonly known in the arts such as tertiary amines, siloamines, basic compounds which contain nitrogen, e.g. tetra-alkylammonium hydroxide, alkali metal phenolates, alkali metal alcolates, hexahydrotriazines, tin organo-metallic and mixtures thereof.
• These catalysts are generally used in a quantity of from 0.001% to 10% by weight, based on the weight of the reaction mixtures-
• Suitable foam stabilizers are mainly water-soluable poly- ether siloxanes and those described in U. S. Patent No. 3,629,308. These additives are preferably used in quantities of from 0% to 20% by weight, based on the reaction mixture.
• the quantitative proportions of the reactants used in this invention are not critical, and exact measurements are not necessary.
• the amount of any of the reactants may vary.
• a thick liquid or soft solid propolymer may be produced when an excess of alkali metal silicate and an organie compound is used.
• the prepolymer may be further reacted with the polyisocyanate, to produce a solid or cellular solid product.
• the soft solid prepolymer may be used as putty, for surface coating, or adhesive bonds, grouting compositon and for producing foams. It may also be injection molded, extruded " or worked- p in a kneader-
• the solid or cellular solid product produced by this invention is to be used where high temperature resistance and complete flame resistance is necessary, it is produced by using a silicate content of 70% to 95% and by using a non-volatile hardner such as mineral acids, hydrogen containing salts, ammo salts, etc. Compressed air may be used as the blowing agent. Flame retarding agents such as halogenated paraffins and inorganic salts of phosphoric acid may be added.
• the methods according to this invention are suitable to b performed in the available mechanical devices.
• the cellular solid products may be carried out by mixing the reactants in one or more steps in a continuous or intermittent operating mixing apparatus. The mixed reactants will expand and produce cellular solid products outside the mixing apparatus.' If desired, prepolymer may be prepared then expanded by heat, curing catalyst, blowing agent or by adding additional polyiso cyanate. The prepolymers of this invention are cured by heati at a temperature from 50 to 200 C. Once the curing reaction started, external heat is not usually necessary to finish the curing process.
• ho expanded beads of glass or plastic or hollow natural material may be used for producing cellular solid products.
• the produc of this invention may be produced as cellular solid beads by dropping the curing'mixture into petroleum hydrocarbons or by free fall. These beads may be compressed together or mixed wi other light weight or expanded material, e.g., expanded glass, expanded clay, wood, cork, popcorn, hollow plastic beads ' , e.g. beads of polystyrene, polyethylene, polypropylene, polyvinyl chloride, polysulphone/ polyepoxide, polyurethane, urea- formaldehyde, phenol-formaldehyde, polyimide, and added to the mixtures of this invention before curing.
• the cured product may be used as insulating materials which have good fire re ⁇ sistant properties, as constructional elements in the building industry, furniture industry and motor vehicle and aircraft industry.
• the beads or cellular solid products in- crumbly form may be used as a soil conditioner.
• the expanding mixtures of this invention may be sprayed o walls, soil banks, fabric, wire meshes, fiberglass cloth and
• the expanding mix ⁇ tures may be used for sealing joints, for sealing and plastering surfaces, for erection of walls and homes, for priming, insula ⁇ ting and deocrating, for coating as living material, as adhesives, mortars, casting compositions and fillers.
• the foams will cure and dry on the surface on which they are sprayed.
• the expanding mixtures of this invention in many cases may be poured into forms and used in place of wood.
• the cured product may be sawed, nailed, drilled, planed, ground and treated as wood.
• the mixtures may be extruded through dies and slots to produce fibers, thin layered sheets and may be used in paper making or as filler in paper making, etc.
• fillers in the form of fine particles or powders are preferred such as chalk, dolomite, gypsum, glass, carbon, anhydrite and-the conventional plastics.
• fillers in the form of granulates, wire, fibers, crystallites, rods, spirals, beads, foam particles, woven or knitted fabric, tapes, foil, fillers of solid inorganic or organic substances such as sand, alumina, asbestos, aluminum oxide and hydroxide, zeolites, calcium sulfates, alumino silicate, cements, basalt powder or wood/ glass fibers, carbon fibers, graphite carbon black, Al, Fe, Cu and Ag powders, steel wool, bronze or copper meshes, silicon powder, glass powder, wood chips, wood flower, lignin cork, cotton, straw, popcorn, coke or particles of filled or unfilled, foamed or unfoamed, stretched or unstretched organic polymers may be used.
• organic polymers examples include poly ⁇ styrene, polyethylene, polypropylene, polyacrylonitrile, poly- butadiene, polyisoprene. polytetrafluroethylene, aliphatic and aromatic polyesters, mela ineurea resins, polyacetal resins, polyethers, polyether silicate polymers, polyureas, polyepoxides, polyhydantoins, polysulphones, polyurethanes, polyimides, polyamides, polycarbonates and any copolymers thereof.
• the object of the present invention is to provide a novel method of producing poly (polyisocyanate silicate) solid or
• Another object is to produce novel poly (urethane silicate) solid or cellular solid products.
• Another object is to produce relative low cost foamed and elastomeric inorganic-organic plastics.
• Still another object is to produce novel cellular solid products of relatively low cost, rigid, fine cellular, light-weight, high-strength, good flame resistance and dimensional stability when heated.
• a further object is to produce inorganic-organic plastics that m be used for thermal insulating , structural purposes, sound proofing, shock resistant packaging, cushions, coating wood an metals, adhesives, casting material, putty, etc.
• Dry granular hydrated silica is heated with sodium hydro ⁇ xide in a 1:1 mol ratio and in an aqueous solution until the water evaporates, thereby producing granules of sodium silicate, and monosodium silicate.
• About 2 parts by weight of this mixture of granules and 2 parts by weight of toluene diisocyanate are mixed, then heated to 30 to 40 C. while agitating at ambient pressure, thereby producing yellow granules of poly (toluene diisocyanate sodium silicate) prepolymer.
• the pre ⁇ polymer is then heated to about 50 C. while agitating, and the mixture rapidly expands to 3 to 12 times its original volume, thereby producing a rigid self-standing poly (toluene diisocyanate silicate) cellular solid product.
• Examples, 18 through 27 utilize 1 part by weight of a polypol and the mixture of poly (toluene diisocyanate potassium silicate) prepolymer, potassium silicate and toluene diisocyanate as produced in Example 2. They are mixed with 0 to 1 part by weight of a curing catalyst, and the mixt-ure rapidly reacts chemically to produce a poly (urethane silicate) solid or cellular solid product. Two parts by weight of the mixture of poly (toluene diisocyanate potassium silicate) prepolymer, potassium silicate and diiso ⁇ cyanate are used.
• Examples, 28 through 36 utilize 2 parts by weight of the mixture of poly (toluene diisocyanate sodium silicate) prepolymer, sodium silicate and toluene diisocyanate as produced in Example 1 with 1 part by weight of a reactant and 1 part by weight of a polyol. They are mixed and they rapidly expand 3 to 12 times their original volume to produce a poly (urethane silicate) product.
• Examples 36 through 50 utilize 2 parts by weight of the poly (toluene diisocyanate sodium silicate) pre ⁇ polymer as produced in Example 3, 1 part by weight of a vinyl monomer and 1 part by weight of a polyol. They, are mixed and the mixture rapidly expands 3 to 12 times its original volume to produce a poly (urethane silicate) product.
• Examples 51 through 62 utilize 2 parts by weight of dry grnaular sodium metasilicate, 2 parts by weight of toluene diisocyanate and 2 parts by weight of an organic reactant and are added at the same time while agitating. They rapidly react to produce a thick liquid or a soft solid with free hydroxyl and silicic acid groups. To these solid prepolymers, 1 part by weight of toluene diisocyanate is added and mixed thoroughly. The mixture expands rapidly to produce a rigid, self-standing poly (polyisocyanate organic-silicate) cellular solid product.
• Examples, 63 through 81 utilize 1 part by weight of the. poly (toluene diisocyanate sodium silicate) prepolymer as produced by Example 4 which is mixed with 1 par by weight of a rectant and 0 to 2 parts by weight of a curing agent,,thereby producing a poly (urethane silicate) solid or cellular solid product.
• Examples, 84 to 92 utilizes 3 parts by weight of toluene diisocyanate, 1 part by weight of dry granular sodium silicate, and a polyol listed below, which are mixed simul ⁇ taneous while agitating at a temperature between ambient and 40° C. for 10 to 30 minutes thereby producing a poly (urethane silicate) prepolymer.
• the prepolymer is then heated to 50 to 80° c. while agitating until the prepolymer begins to expand. It expands 3 to 12 times its original volume thereby producing a poly (urethane silicate) cellular solid.

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• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Inorganic Chemistry (AREA)
• Polyurethanes Or Polyureas (AREA)

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• 1980
  • 1980-04-14 GB GB8127163A patent/GB2082611A/en not_active Withdrawn
  • 1980-04-14 WO PCT/US1980/000410 patent/WO1981002300A1/fr not_active Application Discontinuation
  • 1980-04-14 NL NL8020181A patent/NL8020181A/nl unknown
  • 1980-04-14 EP EP19800900962 patent/EP0044832A4/fr not_active Withdrawn
• 1981
  • 1981-09-10 SE SE8105379A patent/SE8105379L/ not_active Application Discontinuation

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