CN110885418A - Polyurethane rigid foam for on-line tube heat collector and preparation method thereof - Google Patents
Polyurethane rigid foam for on-line tube heat collector and preparation method thereof Download PDFInfo
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- CN110885418A CN110885418A CN201911293044.7A CN201911293044A CN110885418A CN 110885418 A CN110885418 A CN 110885418A CN 201911293044 A CN201911293044 A CN 201911293044A CN 110885418 A CN110885418 A CN 110885418A
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- 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
- C08G18/482—Mixtures of polyethers containing at least one polyether containing nitrogen
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- 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
- C08G18/487—Polyethers containing cyclic groups
- C08G18/4883—Polyethers containing cyclic groups containing cyclic groups having at least one oxygen atom in the ring
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- 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
- C08G18/50—Polyethers having heteroatoms other than oxygen
- C08G18/5021—Polyethers having heteroatoms other than oxygen having nitrogen
- C08G18/5024—Polyethers having heteroatoms other than oxygen having nitrogen containing primary and/or secondary amino groups
- C08G18/5027—Polyethers having heteroatoms other than oxygen having nitrogen containing primary and/or secondary amino groups directly linked to carbocyclic groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/08—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing carbon dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
- C08J9/141—Hydrocarbons
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- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/02—CO2-releasing, e.g. NaHCO3 and citric acid
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/20—Ternary blends of expanding agents
- C08J2203/204—Ternary blends of expanding agents of chemical foaming agent and physical blowing agents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/08—Polyurethanes from polyethers
Abstract
The invention belongs to the technical field of polyurethane, and particularly relates to polyurethane rigid foam for an online tube heat collector and a preparation method thereof. The adhesive is prepared from a combined polyether component and an isocyanate component, wherein the mass ratio of the isocyanate component to the combined polyether component is 110-150: 100, the combined polyether component consists of the following raw materials: sucrose toluene diamine polyether polyol A, sucrose glycerol polyether polyol B, low-functionality polyether polyol C, a surfactant, a catalyst, an antioxidant, a chemical foaming agent and a physical foaming agent. According to the polyurethane rigid foam for the on-line tube heat collector, the polyether polyol A synthesized by using the sucrose and toluenediamine co-initiator in the industry for the first time enables the foam performance to be remarkably improved in the aspects of foam strength, foam density distribution and high temperature resistance, and solves the practical problems of cracking of a foam tube opening of the on-line tube, poor heat insulation effect, deformation and water leakage of a rubber ring, tube burst and the like.
Description
Technical Field
The invention belongs to the technical field of polyurethane, and particularly relates to polyurethane rigid foam for an online tube heat collector and a preparation method thereof.
Background
As a heat insulation material, the hard polyurethane foam has the advantages of low heat conductivity coefficient, high strength, high closed cell rate, good plasticity and the like compared with other heat insulation materials, and is widely applied to various industries needing heat insulation.
For an online tube heat collector, the main principle is to absorb solar energy and convert the solar energy into heat energy so as to provide hot water for schools, factories, public buildings and the like. In the online pipe heat collector, polyurethane rigid foam is used for heat preservation, so that energy loss is reduced. However, as the scale of the project increases, more and more on-line pipes have various problems of pipe opening cracking, poor heat preservation effect, rubber ring deformation and water leakage, pipe explosion and the like, and the project quality and the use effect of users are seriously reduced.
Currently, in the on-line tubular thermal collector industry, polyurethane foams are made using a polyether polyol with HCFC-141b (monofluorodichloroethane) blowing agent. In recent years, with the push for the environmental protection of blowing agents, HCFC-141b (monofluorodichloroethane) has high ozone depletion potential (ODP ═ 0.11) and global warming potential (GWP ═ 0.09), so that it is difficult to use for a long time.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: overcomes the defects of the prior art and provides polyurethane rigid foam for an on-line tube heat collector and a preparation method thereof. The prepared polyurethane rigid foam is obviously improved in the aspects of foam strength, foam density distribution and high temperature resistance, so that the practical problems of cracking of a foam pipe orifice of an online pipe, poor heat insulation effect, deformation and water leakage of a rubber ring, pipe explosion and the like are solved; the invention also provides a preparation method thereof.
The polyurethane rigid foam for the on-line tube heat collector is prepared from a combined polyether component and an isocyanate component, wherein the mass ratio of the isocyanate component to the combined polyether component is 110-: 100, wherein: the composite polyether component comprises the following raw materials in parts by weight based on 100 parts by weight:
wherein:
preferably, the mass ratio of the isocyanate component to the combined polyether component is 120-130: 100.
the isocyanate component is polymeric MDI (polymethylene polyphenyl polyisocyanate) and the NCO content is 30-32%. The polymeric MDI is one of the standard products on the market such as PM200, M20S or 44V 20.
The sucrose toluene diamine polyether polyol A is polyether polyol prepared by the addition reaction of sucrose and toluene diamine as co-initiators and propylene oxide, and has a hydroxyl value of 380-430 mgKOH/g.
The sucrose-glycerol polyether polyol B is polyether polyol prepared by the addition reaction of sucrose and glycerol as co-initiators and propylene oxide, and has a hydroxyl value of 430-470 mgKOH/g.
The low-functionality polyether polyol C is polyether polyol prepared by the addition reaction of glycerin as an initiator and propylene oxide, and the hydroxyl value of the polyether polyol C is 330-345 mgKOH/g.
The surfactant is a carbon-carbon bond non-hydrolytic polysiloxane-polyether copolymer, preferably the winning company B8545 or the Maillard company AK8830, has strong nucleation effect, contributes to forming better cells and provides better foam strength.
The catalyst is a mixture of tertiary amine catalyst and organic metal catalyst.
Wherein: the tertiary amine catalyst is one or more of pentamethyldiethylenetriamine, N dimethylcyclohexylamine, N dimethylbenzylamine and tris (dimethylaminomethyl) -2,4, 6-phenol which are mixed in any proportion; preferred are mixtures of pentamethyldiethylenetriamine, N dimethylcyclohexylamine, N dimethylbenzylamine and tris (dimethylaminomethyl) -2,4, 6-phenol.
The organic metal catalyst is one or two of potassium isooctanoate or potassium acetate which are mixed according to any proportion; the organometallic catalyst is preferably potassium acetate.
The antioxidant is one or more of PU1135, PU316A or PU339, preferably PU339, and is prepared from Shanghai Qike fluorosilicone materials, Inc.
The chemical foaming agent is deionized water.
The physical foaming agent is one or two of cyclopentane or isopentane which are mixed according to a certain proportion; preferably, the physical blowing agent is cyclopentane: isopentane is mixed according to the mass ratio of 7: 3 mixing the resulting mixture.
According to the polyurethane rigid foam for the on-line tube heat collector, the polyether polymer consisting of the sucrose toluene diamine polyether polyol A, the sucrose glycerin polyether polyol B and the low-functionality polyether polyol C is used, the structure of the polyether polyol A taking sucrose and toluene diamine as co-initiators can form a benzene ring structure in polyurethane molecules, so that the strength of foam cells is improved, the phenomenon of tube opening cracking is solved, meanwhile, the polyether polyol taking sucrose as an initiator has excellent high-temperature resistance, and the foam is prevented from being carbonized at high temperature, so that the polyurethane rigid foam has obvious advantages; in order to prevent high-temperature carbonization, an antioxidant is introduced into the combined polyether, so that the function of preventing carbonization caused by overhigh internal temperature rise is achieved.
The invention relates to a preparation method of polyurethane rigid foam for an on-line tube heat collector, which comprises the following steps:
(1) sequentially adding sucrose toluene diamine polyether polyol A, sucrose glycerol polyether polyol B, low-functionality polyether polyol C, a surfactant, a catalyst, an antioxidant and a chemical foaming agent, and mixing to prepare a polyether polyol mixture;
(2) further mixing a physical foaming agent with the polyether polyol mixture obtained in the step (1) to obtain a combined polyether component;
(3) and mixing the obtained combined polyether component and an isocyanate component by using a high-pressure foaming machine, pouring the mixture into an online tube heat collector mold, and opening the mold at regular time to prepare the polyurethane rigid foam.
Wherein:
the operating conditions of the high-pressure foaming machine are as follows: the material temperature of the material tank is set to be 18-22 ℃, the temperature of the gun head is 20-25 ℃, the foaming pressure of the gun head is 100-130 bar, and the flow is 300-700 g/s.
Compared with the prior art, the invention has the following beneficial effects:
(1) the polyurethane rigid foam for the on-line tube heat collector adopts an environment-friendly pentane type foaming agent for the first time in the on-line tube heat collector industry, and has zero ozone depletion potential (ODP value) and global warming potential (GWP value).
(2) According to the polyurethane rigid foam for the on-line tube heat collector, the polyether polyol A synthesized by using the sucrose and toluenediamine co-initiator in the industry for the first time enables the foam performance to be remarkably improved in the aspects of foam strength, foam density distribution and high temperature resistance, and solves the practical problems of cracking of a foam tube opening of the on-line tube, poor heat insulation effect, deformation and water leakage of a rubber ring, tube burst and the like.
(3) According to the polyurethane rigid foam for the on-line tube heat collector, the antioxidant is added, so that the high-temperature resistance in the foam is obviously improved, the foam carbonization temperature is improved, and other properties are not weakened.
(4) According to the preparation method of the polyurethane rigid foam for the on-line tube heat collector, the component A is prepared at normal temperature, so that energy is saved, energy supply equipment and complicated operation are reduced, and all indexes of the prepared product meet the national standard requirements.
Detailed Description
The present invention is further described below with reference to examples.
Example 1
The rigid polyurethane foam for the on-line tube heat collector in this embodiment 1 is prepared from a composite polyether component and an isocyanate component, wherein a mass ratio of the isocyanate component to the composite polyether component is 120: 100, wherein: the composite polyether component comprises the following raw materials in parts by weight based on 100 parts by weight:
wherein:
the sucrose toluene diamine polyether polyol A is a product of Shandong Nonwei new material company, and the hydroxyl value is 400 mgKOH/g.
The sucrose glycerin type polyether polyol B is a product INOVOL R8345 sold by Shandong Nonwei new material company, and the hydroxyl value is 450 mgKOH/g.
The low functionality polyether polyol C is commercially available from New materials, Norway, Shandong as INOVOL C305, and has a hydroxyl number of 338 mgKOH/g.
The surfactant is Yingchuang B8545.
The catalyst is a mixture of tertiary amine catalyst and organic metal catalyst.
The catalyst is a mixture of pentamethyldiethylenetriamine, N dimethylcyclohexylamine, N dimethylbenzylamine, tris (dimethylaminomethyl) -2,4, 6-phenol and potassium acetate, and the fixed ratio of the catalyst is 1: 5: 5: 1: 1.
the chemical foaming agent is deionized water.
The physical foaming agent is a mixture of cyclopentane and isopentane, and the mixing mass ratio is 7: 3.
polymeric MDI is PM200, NCO content 31.2%, Tantawa polyurethane, Inc.
The preparation method of the rigid polyurethane foam for the on-line tube heat collector in the embodiment 1 comprises the following steps:
(1) sequentially adding sucrose toluene diamine polyether polyol A, sucrose glycerol polyether polyol B, low-functionality polyether polyol C, a surfactant, a catalyst, an antioxidant and a chemical foaming agent, and mixing to prepare a polyether polyol mixture;
(2) further mixing a physical foaming agent with the polyether polyol mixture obtained in the step (1) to obtain a combined polyether component;
(3) and mixing the obtained combined polyether component and an isocyanate component by using a high-pressure foaming machine, pouring the mixture into an online tube heat collector mold, and opening the mold at regular time to prepare the polyurethane rigid foam.
Wherein:
the operating conditions of the high-pressure foaming machine are as follows: the material temperature of the material tank is set to be 20 ℃, the temperature of the gun head is 22 ℃, the foaming pressure of the gun head is 115bar, and the flow is 500 g/s.
Example 2
The rigid polyurethane foam for the on-line tube heat collector in this embodiment 2 is prepared from a composite polyether component and an isocyanate component, wherein a mass ratio of the isocyanate component to the composite polyether component is 120: 100, wherein: the composite polyether component comprises the following raw materials in parts by weight based on 100 parts by weight:
wherein:
the sucrose toluene diamine polyether polyol A is a product of Shandong Nonwei new material company, and the hydroxyl value is 400 mgKOH/g.
The sucrose glycerin type polyether polyol B is a product INOVOL R8345 sold by Shandong Nonwei new material company, and the hydroxyl value is 450 mgKOH/g.
The low functionality polyether polyol C is commercially available from New materials, Norway, Shandong as INOVOL C305, and has a hydroxyl number of 338 mgKOH/g.
The surfactant is Yingchuang B8545.
The catalyst is a mixture of tertiary amine catalyst and organic metal catalyst.
The catalyst is a mixture of pentamethyldiethylenetriamine, N dimethylcyclohexylamine, N dimethylbenzylamine, tris (dimethylaminomethyl) -2,4, 6-phenol and potassium acetate, and the fixed ratio of the catalyst is 1: 5: 5: 1: 1.
the chemical foaming agent is deionized water.
The physical foaming agent is a mixture of cyclopentane and isopentane, and the mixing mass ratio is 7: 3.
polymeric MDI is PM200, NCO content 31.2%, Tantawa polyurethane, Inc.
The preparation method of the rigid polyurethane foam for the on-line tube heat collector in the embodiment 2 comprises the following steps:
(1) sequentially adding sucrose toluene diamine polyether polyol A, sucrose glycerol polyether polyol B, low-functionality polyether polyol C, a surfactant, a catalyst, an antioxidant and a chemical foaming agent, and mixing to prepare a polyether polyol mixture;
(2) further mixing a physical foaming agent with the polyether polyol mixture obtained in the step (1) to obtain a combined polyether component;
(3) and mixing the obtained combined polyether component and an isocyanate component by using a high-pressure foaming machine, pouring the mixture into an online tube heat collector mold, and opening the mold at regular time to prepare the polyurethane rigid foam.
Wherein:
the operating conditions of the high-pressure foaming machine are as follows: the material temperature of the material tank is set to be 20 ℃, the temperature of the gun head is 22 ℃, the foaming pressure of the gun head is 115bar, and the flow is 500 g/s.
Example 3
The rigid polyurethane foam for the on-line tube heat collector in this embodiment 3 is prepared from a composite polyether component and an isocyanate component, wherein a mass ratio of the isocyanate component to the composite polyether component is 120: 100, wherein: the composite polyether component comprises the following raw materials in parts by weight based on 100 parts by weight:
wherein:
the sucrose toluene diamine polyether polyol A is a product of Shandong Nonwei new material company, and the hydroxyl value is 400 mgKOH/g.
The sucrose glycerin type polyether polyol B is a product INOVOL R8345 sold by Shandong Nonwei new material company, and the hydroxyl value is 450 mgKOH/g.
The low functionality polyether polyol C is commercially available from New materials, Norway, Shandong as INOVOL C305, and has a hydroxyl number of 338 mgKOH/g.
The surfactant is Yingchuang B8545.
The catalyst is a mixture of tertiary amine catalyst and organic metal catalyst.
The catalyst is a mixture of pentamethyldiethylenetriamine, N dimethylcyclohexylamine, N dimethylbenzylamine, tris (dimethylaminomethyl) -2,4, 6-phenol and potassium acetate, and the fixed ratio of the catalyst is 1: 5: 5: 1: 1.
the chemical foaming agent is deionized water.
The physical foaming agent is a mixture of cyclopentane and isopentane, and the mixing mass ratio is 7: 3.
polymeric MDI is PM200, NCO content 31.2%, Tantawa polyurethane, Inc.
The preparation method of the rigid polyurethane foam for the on-line tube heat collector in the embodiment 3 comprises the following steps:
(1) sequentially adding sucrose toluene diamine polyether polyol A, sucrose glycerol polyether polyol B, low-functionality polyether polyol C, a surfactant, a catalyst, an antioxidant and a chemical foaming agent, and mixing to prepare a polyether polyol mixture;
(2) further mixing a physical foaming agent with the polyether polyol mixture obtained in the step (1) to obtain a combined polyether component;
(3) and mixing the obtained combined polyether component and an isocyanate component by using a high-pressure foaming machine, pouring the mixture into an online tube heat collector mold, and opening the mold at regular time to prepare the polyurethane rigid foam.
Wherein:
the operating conditions of the high-pressure foaming machine are as follows: the material temperature of the material tank is set to be 20 ℃, the temperature of the gun head is 22 ℃, the foaming pressure of the gun head is 115bar, and the flow is 500 g/s.
Example 4
The rigid polyurethane foam for the on-line tube heat collector in this embodiment 4 is prepared from a composite polyether component and an isocyanate component, wherein a mass ratio of the isocyanate component to the composite polyether component is 120: 100, wherein: the composite polyether component comprises the following raw materials in parts by weight based on 100 parts by weight:
wherein:
the sucrose toluene diamine polyether polyol A is a product of Shandong Nonwei new material company, and the hydroxyl value is 400 mgKOH/g.
The sucrose glycerin type polyether polyol B is a product INOVOL R8345 sold by Shandong Nonwei new material company, and the hydroxyl value is 450 mgKOH/g.
The low functionality polyether polyol C is commercially available from New materials, Norway, Shandong as INOVOL C305, and has a hydroxyl number of 338 mgKOH/g.
The surfactant is Yingchuang B8545.
The catalyst is a mixture of tertiary amine catalyst and organic metal catalyst.
The catalyst is a mixture of pentamethyldiethylenetriamine, N dimethylcyclohexylamine, N dimethylbenzylamine, tris (dimethylaminomethyl) -2,4, 6-phenol and potassium acetate, and the fixed ratio of the catalyst is 1: 5: 5: 1: 1.
the chemical foaming agent is deionized water.
The physical foaming agent is a mixture of cyclopentane and isopentane, and the mixing mass ratio is 7: 3.
polymeric MDI is PM200, NCO content 31.2%, Tantawa polyurethane, Inc.
The preparation method of the rigid polyurethane foam for the on-line tube heat collector in this embodiment 4 comprises the following steps:
(1) sequentially adding sucrose toluene diamine polyether polyol A, sucrose glycerol polyether polyol B, low-functionality polyether polyol C, a surfactant, a catalyst, an antioxidant and a chemical foaming agent, and mixing to prepare a polyether polyol mixture;
(2) further mixing a physical foaming agent with the polyether polyol mixture obtained in the step (1) to obtain a combined polyether component;
(3) and mixing the obtained combined polyether component and an isocyanate component by using a high-pressure foaming machine, pouring the mixture into an online tube heat collector mold, and opening the mold at regular time to prepare the polyurethane rigid foam.
Wherein:
the operating conditions of the high-pressure foaming machine are as follows: the material temperature of the material tank is set to be 20 ℃, the temperature of the gun head is 22 ℃, the foaming pressure of the gun head is 115bar, and the flow is 500 g/s.
Example 5
The rigid polyurethane foam for the on-line tube heat collector in this embodiment 5 is prepared from a composite polyether component and an isocyanate component, wherein a mass ratio of the isocyanate component to the composite polyether component is 120: 100, wherein: the composite polyether component comprises the following raw materials in parts by weight based on 100 parts by weight:
wherein:
the sucrose toluene diamine polyether polyol A is a product of Shandong Nonwei new material company, and the hydroxyl value is 400 mgKOH/g.
The sucrose glycerin type polyether polyol B is a product INOVOL R8345 sold by Shandong Nonwei new material company, and the hydroxyl value is 450 mgKOH/g.
The low functionality polyether polyol C is commercially available from New materials, Norway, Shandong as INOVOL C305, and has a hydroxyl number of 338 mgKOH/g.
The surfactant is Yingchuang B8545.
The catalyst is a mixture of tertiary amine catalyst and organic metal catalyst.
The catalyst is a mixture of pentamethyldiethylenetriamine, N dimethylcyclohexylamine, N dimethylbenzylamine, tris (dimethylaminomethyl) -2,4, 6-phenol and potassium acetate, and the fixed ratio of the catalyst is 1: 5: 5: 1: 1.
the chemical foaming agent is deionized water.
The physical foaming agent is a mixture of cyclopentane and isopentane, and the mixing mass ratio is 7: 3.
polymeric MDI is PM200, NCO content 31.2%, Tantawa polyurethane, Inc.
The preparation method of the rigid polyurethane foam for the on-line tube heat collector in this embodiment 5 comprises the following steps:
(1) sequentially adding sucrose toluene diamine polyether polyol A, sucrose glycerol polyether polyol B, low-functionality polyether polyol C, a surfactant, a catalyst, an antioxidant and a chemical foaming agent, and mixing to prepare a polyether polyol mixture;
(2) further mixing a physical foaming agent with the polyether polyol mixture obtained in the step (1) to obtain a combined polyether component;
(3) and mixing the obtained combined polyether component and an isocyanate component by using a high-pressure foaming machine, pouring the mixture into an online tube heat collector mold, and opening the mold at regular time to prepare the polyurethane rigid foam.
Wherein:
the operating conditions of the high-pressure foaming machine are as follows: the material temperature of the material tank is set to be 20 ℃, the temperature of the gun head is 22 ℃, the foaming pressure of the gun head is 115bar, and the flow is 500 g/s.
Example 6
The rigid polyurethane foam for the on-line tube heat collector in this embodiment 6 is prepared from a composite polyether component and an isocyanate component, wherein a mass ratio of the isocyanate component to the composite polyether component is 120: 100, wherein: the composite polyether component comprises the following raw materials in parts by weight based on 100 parts by weight:
wherein:
the sucrose toluene diamine polyether polyol A is a laboratory product of Shandong-Nonwei new material company, and the hydroxyl value is 400 mgKOH/g.
The sucrose glycerin type polyether polyol B is a product INOVOL R8345 sold by Shandong Nonwei new material company, and the hydroxyl value is 450 mgKOH/g.
The low functionality polyether polyol C is commercially available from New materials, Norway, Shandong as INOVOL C305, and has a hydroxyl number of 338 mgKOH/g.
The surfactant is Yingchuang B8545.
The catalyst is a mixture of tertiary amine catalyst and organic metal catalyst.
The catalyst is a mixture of pentamethyldiethylenetriamine, N dimethylcyclohexylamine, N dimethylbenzylamine, tris (dimethylaminomethyl) -2,4, 6-phenol and potassium acetate, and the fixed ratio of the catalyst is 1: 5: 5: 1: 1.
the chemical foaming agent is deionized water.
The physical foaming agent is a mixture of cyclopentane and isopentane, and the mixing mass ratio is 7: 3.
polymeric MDI is PM200, NCO content 31.2%, Tantawa polyurethane, Inc.
The preparation method of the rigid polyurethane foam for the on-line tube heat collector in this embodiment 6 includes the following steps:
(1) sequentially adding sucrose toluene diamine polyether polyol A, sucrose glycerol polyether polyol B, low-functionality polyether polyol C, a surfactant, a catalyst, an antioxidant and a chemical foaming agent, and mixing to prepare a polyether polyol mixture;
(2) further mixing a physical foaming agent with the polyether polyol mixture obtained in the step (1) to obtain a combined polyether component;
(3) and mixing the obtained combined polyether component and an isocyanate component by using a high-pressure foaming machine, pouring the mixture into an online tube heat collector mold, and opening the mold at regular time to prepare the polyurethane rigid foam.
Wherein:
the operating conditions of the high-pressure foaming machine are as follows: the material temperature of the material tank is set to be 20 ℃, the temperature of the gun head is 22 ℃, the foaming pressure of the gun head is 115bar, and the flow is 500 g/s.
Comparative example 1
Referring to example 5, there is no antioxidant, and the parts by weight thereof are added to the parts by weight of the sucrose glycerin-based polyether polyol B.
Comparative example 2
Referring to example 3, there is no antioxidant, and the parts by weight thereof are added to the parts by weight of the sucrose glycerin-based polyether polyol B. The sucrose-free toluene diamine polyether polyol A is replaced by polyether polyol D with the same mass fraction, the polyether polyol D is sucrose sorbitol propylene glycol as an initiator, the hydroxyl value is 430mgKOH/g, and the sucrose-free toluene diamine polyether polyol A is INOVOLR4110B sold by Shandong Nowei new material company.
Comparative example 3
Referring to example 3, sucrose-free toluene diamine polyether polyol A was replaced with equal mass fraction of polyether polyol D, which was sucrose sorbitol propylene glycol as initiator, and had a hydroxyl value of 430mgKOH/g, which was INOVOL R4110B commercially available from Shandong Noway New Material company.
Table 1 examples and comparative examples polyurethane rigid foam raw material ratios and performance test results
The high-temperature carbonization condition is represented by a score of 10-100 in the chart 1.
In examples 1-4, the antioxidant was PU339, the antioxidant in example 5 was PU1135, the antioxidant in example 6 was PU316A, and no antioxidant was added in comparative examples 1 and 2.
From the test results the following conclusions can be drawn:
(1) as can be seen from the results of comparative examples 1, 2 and 3, the high-temperature carbonization was significantly weaker than in examples. The antioxidant is added into the composite polyether component, so that the high-temperature carbonization condition can be obviously improved.
(2) From the results of comparative examples 2, 3, it can be seen that the compressive strength is significantly less than in the examples. From the results of examples 1, 2, 3, 4, it can be seen that the compressive strength of the foam can be effectively increased with increasing fraction of the developed sucrose toluene diamine polyether polyol a used in the composite polyether component. And with the increase of the mass fraction of the sucrose toluene diamine polyether polyol A, the high-temperature carbonization result is better, which shows that the sucrose toluene diamine polyether polyol A has obvious improvement effect on the high-temperature carbonization of the foam.
(3) As can be seen from the results of the thermal conductivity in comparative examples 1 and 2, the addition of the antioxidant has no destructive effect on the thermal conductivity.
And (4) supplementary notes:
foam core density test according to standard: GB/T6343-2009.
Foam compression strength test according to the standard: GB/T8813-.
Foam thermal conductivity test according to standard: GB/T10295-.
The foam high-temperature carbonization condition evaluation method comprises the following steps: after foaming (300 mm), the foam was left at room temperature of 25 ℃ for 24 hours, and then placed in a high temperature oven at 140 ℃ for 96 hours, and the result was observed by cutting the middle.
Claims (10)
1. A rigid polyurethane foam for an on-line tube heat collector is characterized in that: the adhesive is prepared from a combined polyether component and an isocyanate component, wherein the mass ratio of the isocyanate component to the combined polyether component is 110-150: 100, wherein: the composite polyether component comprises the following raw materials in parts by weight based on 100 parts by weight:
2. the rigid polyurethane foam for an inline tube heat collector as set forth in claim 1, wherein: the isocyanate component is polymethylene polyphenyl polyisocyanate, and the NCO content is 30-32%.
3. The rigid polyurethane foam for an inline tube heat collector as set forth in claim 1, wherein: the sucrose toluene diamine polyether polyol A is polyether polyol prepared by the addition reaction of sucrose and toluene diamine as co-initiators and propylene oxide, and has a hydroxyl value of 380-430 mgKOH/g.
4. The rigid polyurethane foam for an inline tube heat collector as set forth in claim 1, wherein: the sucrose-glycerol polyether polyol B is polyether polyol prepared by the addition reaction of sucrose and glycerol as co-initiators and propylene oxide, and has a hydroxyl value of 430-470 mgKOH/g.
5. The rigid polyurethane foam for an inline tube heat collector as set forth in claim 1, wherein: the low-functionality polyether polyol C is polyether polyol prepared by the addition reaction of glycerin as an initiator and propylene oxide, and the hydroxyl value of the polyether polyol C is 330-345 mgKOH/g.
6. The rigid polyurethane foam for an inline tube heat collector as set forth in claim 1, wherein: the catalyst is a mixture of tertiary amine catalyst and organic metal catalyst.
7. The rigid polyurethane foam for an inline tube heat collector as set forth in claim 6, wherein: the tertiary amine catalyst is one or more of pentamethyldiethylenetriamine, N dimethylcyclohexylamine, N dimethylbenzylamine and tris (dimethylaminomethyl) -2,4, 6-phenol which are mixed in any proportion; the organic metal catalyst is one or two of potassium isooctanoate or potassium acetate mixed in any proportion.
8. The rigid polyurethane foam for an inline tube heat collector as set forth in claim 1, wherein: the surfactant is one of B8545 or AK 8830; the antioxidant is one or more of PU1135, PU316A or PU 339; the chemical foaming agent is deionized water; the physical foaming agent is one or two of cyclopentane or isopentane which are mixed according to a certain proportion.
9. The method for preparing the rigid polyurethane foam for the inline tube heat collector as set forth in claim 1, wherein the method comprises the steps of: the method comprises the following steps:
(1) sequentially adding sucrose toluene diamine polyether polyol A, sucrose glycerol polyether polyol B, low-functionality polyether polyol C, a surfactant, a catalyst, an antioxidant and a chemical foaming agent, and mixing to prepare a polyether polyol mixture;
(2) further mixing a physical foaming agent with the polyether polyol mixture obtained in the step (1) to obtain a combined polyether component;
(3) and mixing the obtained combined polyether component and an isocyanate component by using a high-pressure foaming machine, pouring the mixture into an online tube heat collector mold, and opening the mold at regular time to prepare the polyurethane rigid foam.
10. The method for preparing the rigid polyurethane foam for an inline tube heat collector as set forth in claim 1, wherein: the operating conditions of the high-pressure foaming machine are as follows: the material temperature of the material tank is set to be 18-22 ℃, the temperature of the gun head is 20-25 ℃, the foaming pressure of the gun head is 100-130 bar, and the flow is 300-700 g/s.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113580689A (en) * | 2021-08-20 | 2021-11-02 | 上海电气船研环保技术有限公司 | Thermal insulation material manufacturing method and water body treatment equipment manufactured by material |
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