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
  • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
  • C08G18/72—Polyisocyanates or polyisothiocyanates
  • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
  • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
  • C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
  • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
  • B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
  • B29C44/0461—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities by having different chemical compositions in different places, e.g. having different concentrations of foaming agent, feeding one composition after the other
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
  • B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
  • B29C67/246—Moulding high reactive monomers or prepolymers, e.g. by reaction injection moulding [RIM], liquid injection moulding [LIM]
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
  • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
  • B32B5/20—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material foamed in situ
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
  • B32B7/02—Physical, chemical or physicochemical properties
  • B32B7/022—Mechanical properties
• • 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
  • C08G18/40—High-molecular-weight compounds
  • C08G18/48—Polyethers
  • C08G18/4804—Two or more polyethers of different physical or chemical nature
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
  • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
  • B29K2105/043—Skinned foam
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2266/00—Composition of foam
  • B32B2266/02—Organic
  • B32B2266/0214—Materials belonging to B32B27/00
  • B32B2266/0278—Polyurethane
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2266/00—Composition of foam
  • B32B2266/08—Closed cell foam
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/70—Other properties
  • B32B2307/72—Density
• • 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
• • 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
  • C08G2110/0033—Foam properties having integral skins
• • 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
  • C08G2110/0041—Foam properties having specified density
  • C08G2110/0058—≥50 and <150kg/m3
• • 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
  • C08G2110/0041—Foam properties having specified density
  • C08G2110/0066—≥ 150kg/m3
• • 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
  • C08G2110/0083—Foam properties prepared using water as the sole blowing agent
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/249921—Web or sheet containing structurally defined element or component
  • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
  • Y10T428/249976—Voids specified as closed
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/249921—Web or sheet containing structurally defined element or component
  • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
  • Y10T428/249976—Voids specified as closed
  • Y10T428/249977—Specified thickness of void-containing component [absolute or relative], numerical cell dimension or density
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/249921—Web or sheet containing structurally defined element or component
  • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
  • Y10T428/249987—With nonvoid component of specified composition
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/249921—Web or sheet containing structurally defined element or component
  • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
  • Y10T428/249987—With nonvoid component of specified composition
  • Y10T428/249991—Synthetic resin or natural rubbers

Definitions

• the present invention relates to polyurethane composites, methods of making the composites and their use, for example, in bicycle saddles, upholstery materials. Background technique
• Polypropylene liners are used to provide support and impact resistance, while polyurethane outer layers are used to provide soft comfort and abrasion resistance.
• the polypropylene and the polyurethane are generally separately formed into the desired corresponding shapes, and then the two are bonded together by an adhesive.
• the object of the present invention is to solve the above-mentioned shortcomings in the field for a long time, to replace the polypropylene-containing composite material with a polyurethane composite material, to simplify the production process, to improve the production efficiency and the product qualification rate, to avoid the use of the binder, and to reduce the binder.
• the present invention provides a polyurethane composite comprising a layer of rigid polyurethane as an inner liner and a layer of veneer (surface closed cell) polyurethane foam directly foamed on the rigid polyurethane inner liner
• the rigid polyurethane is a reaction product of a polyisocyanate with a polyether polyol or a polyester polyol and a chain extender, and has a density of 600 to 1200 kg/m 3 and a Shore D hardness of 40 to 80.
• the tensile strength is 10-60 MPa
• the flexural strength is 20-60 MPa
• the elastic flexural modulus is 800-2500 MPa
• the elongation at break is 10-25%
• the whole skin (surface closed cell) or HR polyurethane flexible foam It is a reaction product of a di/polyisocyanate and a polyol formed by the action of water as a foaming agent, and has a density of 60-180 kg/m 3 , a tensile strength of 60-250 kPa, and an elongation at break of 70-180.
• tear strength is 130-220N/m
• ball rebound value is 40-70%
• IFD 25% is 200-600 N
• IFD 65% is 600-1800 N.
• Another aspect of the present invention provides a method of manufacturing the polyurethane composite, comprising the steps of:
• One aspect of the present invention provides a polyurethane composite comprising a layer of a rigid polyurethane as an inner liner and a layer of a polyurethane flexible foam directly foamed on the rigid polyurethane inner liner.
• the rigid polyurethane used to constitute the polyurethane composite of the present invention is a reaction product of a polyisocyanate with a polyether polyol or/and a polyester polyol and a chain extender.
• the polyisocyanate is a conventional polyisocyanate, non-limiting examples of which are toluene diisocyanate, such as 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, diphenylmethane diisocyanate, for example, 4, 4' Phenylmethane diisocyanate, a modified product of diphenylmethane diisocyanate having an NCO% content of between 18 and 33.6.
• toluene diisocyanate such as 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, diphenylmethane diisocyanate, for example, 4, 4' Phenylmethane diisocyanate, a modified product of diphenylmethane diisocyanate having an NCO% content of between 18 and 33.6.
• Polyisocyanate materials useful as rigid polyurethane liners of the present invention are commercially available, non-limiting Examples are for example:
• PAPI M227, ISONATE M 143 purchased from Dow;
• Non-limiting examples of polyether polyols suitable for use in the present invention are propylene glycol, ethylene glycol, glycerol, trimethylolpropane, pentaerythritol, sucrose, sorbitol, ethylenediamine, toluenediamine, and the like.
• the starting agent forms a polyether polyol having a functionality of from 2 to 8, preferably from 2 to 6, and a hydroxyl number of from 20 to 800.
• the polyether polyol preferably has a hydroxyl value of from 100 to 700.
• Non-limiting examples of polyester polyols are adipic acid or/and phthalic anhydride with ethylene glycol, propylene glycol, glycerol, trimethylolpropane, 1, 4-butanediol, 1, 6 hexanediol, pentanediol and other polycondensation reaction products, the functionality is 2-4, the hydroxyl value is 50-500.
• Polyols suitable for use in the present invention are also commercially available. Non-limiting examples thereof are, for example, Baydur CSP EF 0801-1, Baydur TPPU 601 K20B and Baydur PU 85 BD04 available from Bayer.
• Chain extenders suitable for use in the present invention include glycols, triols and diamines; non-limiting examples of which are ethylene glycol, butylene glycol, glycerol, trimethylolpropane, diethylene glycol
• the dipropylene glycol and the diamine include an aromatic diamine or an aliphatic diamine such as ethylenediamine, toluenediamine and the like.
• the molar ratio of the polyisocyanate to the polyol is from 100 to 130:100, preferably from 105 to 120:100, more preferably from 108 to 115:100.
• the rigid polyurethane product used to constitute the polyurethane composite of the present invention has a density of 600 to 1200 kg/m 3 , preferably 1000 to 1200 kg/m 3 ; Shore A hardness of 90 to 99, preferably 95 to 98. ; Shore D (Shore
• D) hardness is 40-80, preferably 65-75; product tensile strength is 10-60 MPa, preferably 35-45 MPa
• the elongation at break is 10-25%, preferably 12-20%.
• a flame retardant such as tris(2-chloroethyl) phosphate (TCEP) and tris(1,3-dichloro-2) phosphate may be added to the rigid polyurethane of the composite material of the present invention as needed.
• TCEP tris(2-chloroethyl) phosphate
• DMPP dimethylpropyl phosphate
• the polyurethane composite of the present invention also includes a whole skin (surface closed cell) polyurethane soft foam.
• the polyurethane soft foam is a reaction product of a diisocyanate and a glycol formed by the action of water as a blowing agent.
• the diisocyanate is a conventional diisocyanate, non-limiting examples of which are, for example, 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, hexamethylene diisocyanate, tetramethylene diisocyanate, naphthalene diisocyanate, Dibenzoyl diisocyanate, preferably diphenylmethane diisocyanate (MDI) and a modified product having a NCO% content of 24-33 (preferably 18-30); or a mixture of diphenylmethane diisocyanate (MDI) and toluene diisocyanate (TDI) having a NCO% content of 26 to 42.
• MDI diphenylmethane diisocyanate
• TDI toluene diisocyanate
• the polyol has a functionality of from 2 to 4 and a hydroxyl number of from 18 to 60, preferably from 20 to 50.
• Non-limiting examples of mixed graft polyols are polyols having a functionality of 2-4, a hydroxyl number of 18-25, and a solids content of 20-46% (polystyrene PS, polyacrylonitrile PA, polyurea). .
• Polyols for forming polyurethane flexible foams are commercially available. Non-limiting examples thereof are, for example, Bayfit 2856-LY, Bayfit HM 1124 and Bayfit 2873-LY available from Bayer.
• the polyol system for forming the whole skin (surface closed cell) polyurethane soft foam of the present invention contains 0.4 to 1.0% by weight, preferably 0.6 to 0.8% by weight, based on the weight of the polyol system. During the polymerization, the water contained therein acts as a blowing agent.
• the present invention is a density integral skin (surface closed-cell) or HR flexible polyurethane foam product 60- 180kg / m 3, preferably of 70-150kg / m 3; the present invention is stretched integral skin (surface closed-cell) flexible polyurethane foam
• the strength is 60-250 kPa, preferably 80-200 kPa; the elongation at break is 70-180%, preferably 87-160%; the tear strength is 130-220 N/m, preferably 150-200 N/ m, the rebounding rebound value is 40-70%, preferably 50-65%; IFD25% is 200-600N, preferably 300-500N; IFD 65% is 600-1800N, preferably 900-1100N.
• An ultraviolet light stabilizer may also be added to the composite flexible polyurethane foam of the present invention.
• the ultraviolet light stabilizer is not particularly limited and it may be a conventional ultraviolet light stabilizer.
• Non-limiting examples thereof are, for example, Irganox 565 (2-(4-hydroxy-3, 5-di-tert-butylanilino)-4,6-bis(n-octylthio) 1, 3, available from Ciba-Geigy, 5-triazine) and the like.
• additives such as flame retardants such as tris(2-chloroethyl) phosphate (TCEP) and phosphoric acid (1, 3) may be added to the hard and flexible polyurethane foam of the composite of the present invention as needed.
• flame retardants such as tris(2-chloroethyl) phosphate (TCEP) and phosphoric acid (1, 3)
• TCEP tris(2-chloroethyl) phosphate
• DMPP dimethylpropyl phosphate
• foam stabilizer and the like.
• Another aspect of the present invention provides a method of manufacturing the polyurethane composite, comprising the steps of:
• a polyisocyanate and polyol combination system for forming the rigid polyurethane inner liner is added to the upper mold of a composite mold; after 2 to 6 minutes, the mold is opened to form a rigid polyurethane inner liner.
• the term "composite mold” means a mold having an upper mold and a lower mold, the upper mold being capable of independently molding a shaped article, usually a rigid polyurethane liner having a shape
• the lower mold can place the reaction system of the polyurethane soft foam, so that after the mold is closed, the polyurethane soft foam can be directly formed on the formed rigid polyurethane inner liner.
• the shape of the upper mold of the composite mold depends on the specific use. In the case where the composite material of the present invention is used in a bicycle saddle, the shape of the upper mold of the composite mold corresponds to the shape of the bicycle saddle, so that the upper and lower molds of the mold are closed and the polyurethane soft foam is located in the lower mold of the mold.
• the shape of the upper mold of the composite mold corresponds to the column Partially curved shape.
• the upper and lower mold mounting positions are interchangeable during use.
• a diisocyanate and polyol combination system for forming the whole skin (surface closed cell) polyurethane flexible foam is added to the lower mold of the composite mold.
• the polyurethane composite of the present invention is composed of a rigid polyurethane which can withstand heavy pressure and impact and a veneer (surface closed cell) polyurethane foam which is directly foamed on the rigid polyurethane.
• the rigid polyurethane provides impact and pressure resistance
• the skin (surface closed cell) polyurethane soft foam surface layer provides comfort and wear resistance.
• This polyurethane composite eliminates the prior art manual surface treatment of hard support materials, increasing productivity and yield.
• the material is composed entirely of homogenous polyurethane, it is not necessary to peel off the sorting process during recycling, which saves labor costs and is suitable for large-scale industrial production.
• the surface soft foam layer of the composite material of the present invention not only provides a soft hand but also has a sound absorbing effect, thereby replacing the fabric decoration and achieving fire prevention and reduction. Cost and other effects.
• Hydroxyl value is about 370 mg KOH/g
• Viscosity approx. 1,700 mPa - s 100 parts by weight, Baydur CSP EF0801-1 B component polyether compound and
• component A SBUJ243 reaction index 110
• Desmodur 44P01 modified MDI-modified polyphenylmethane diisocyanate purchased from Bayer China (limited) company
• Baydur TP.PU 60IK20 purchased from Bayer China (limited) company Unit hydroxyl value 515 ⁇ 25 mg KOH / g
• Desmodur PU1511L modified MDI purchased from Bayer China (limited) company
• NCO% is about 31%
• Bayfit 2856-LY 100 parts by weight, Bayfit 2856-LY, B component polyether compound with 35 parts by weight, A SBU
• Bayfit HM 1124 purchased from Bayer China (limited)
• the product has the following properties:
• Example 8 In an upper mold for preparing a composite mold for a bicycle saddle, a rigid polyurethane was prepared as described in Example 1, but was not demolded, even if it remained in the upper mold; The reaction system described in Example 4, after closing the mold for 10 minutes, was demolded to obtain a bicycle saddle made of the composite material of the present invention. The bicycle saddle combines the properties of the rigid polyurethane and polyurethane soft foam of the present invention.
• the composite material of the present invention was prepared as described in Example 7 in a circular arc mold, but the rigid polyurethane described in Example 2 and the polyurethane soft foam described in Example 6 were used. A curved composite sheet material is obtained after demolding.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Polyurethanes Or Polyureas (AREA)
• Laminated Bodies (AREA)

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• 2004
  • 2004-09-28 CN CN200410066715A patent/CN1754914B/zh not_active Expired - Fee Related
• 2005
  • 2005-09-26 JP JP2007533854A patent/JP4977029B2/ja not_active Expired - Fee Related
  • 2005-09-26 WO PCT/CN2005/001571 patent/WO2006034640A1/zh not_active Ceased
  • 2005-09-26 EP EP20050791954 patent/EP1818347B1/en not_active Not-in-force
  • 2005-09-26 US US11/663,815 patent/US8017229B2/en not_active Expired - Fee Related

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