CN104497257A - Preparation method of double-component polyurethane heat insulation casting rubber for aluminum profile - Google Patents
Preparation method of double-component polyurethane heat insulation casting rubber for aluminum profile Download PDFInfo
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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
- C08G18/70—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
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
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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
- C08G18/30—Low-molecular-weight compounds
- C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
- C08G18/3802—Low-molecular-weight compounds having heteroatoms other than oxygen having halogens
- C08G18/3814—Polyamines
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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
- C08G18/4812—Mixtures of polyetherdiols with polyetherpolyols having at least three hydroxy groups
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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
- C08G18/4816—Two or more polyethers of different physical or chemical nature mixtures of two or more polyetherpolyols having at least three hydroxy groups
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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
- C08G18/4825—Polyethers containing two hydroxy groups
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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
- C08G18/4829—Polyethers containing at least three hydroxy groups
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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
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6603—Compounds of groups C08G18/42, C08G18/48, or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6614—Compounds of groups C08G18/42, C08G18/48, or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3225 or C08G18/3271 and/or polyamines of C08G18/38
- C08G18/6618—Compounds of groups C08G18/42, C08G18/48, or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3225 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3225 or polyamines of C08G18/38
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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
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
- C08G18/6685—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3225 or polyamines of C08G18/38
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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
- C08G18/70—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
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
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- Polyurethanes Or Polyureas (AREA)
Abstract
The invention relates to a preparation method of double-component polyurethane heat insulation casting rubber for an aluminum profile. The preparation method comprises the steps of mixing a component A and a component B in mass ratio of (85-100):100 at the temperature of 30 to 35 DEG C; reacting; then pouring into a die; curing and forming at normal temperature. According to the preparation method, the component A and the component B can be quickly poured into the die and cured and formed at the normal temperature, and the after-vulcanization treatment is saved, so that the processing performance is outstanding, and the production efficiency of the aluminum profile can be increased; the system adopted is low in toxicity, low in degree of harm for a human body and the environment, has a certain of high- and low-temperature resistance and impact resistance, and is suitable for the rainy and humid environments.
Description
Technical field
The present invention relates to a kind of preparation method for the heat insulation encapsulating compound of aluminium section bar two component polyurethane.
Technical background
Polyurethane elastomer is the polymer blocks polymkeric substance containing more carbamate groups on a kind of main chain, there is the structure of unique soft or hard section segmented copolymer, this give its goods and have excellent comprehensive mechanical property: be excellent mechanical property, wear-resisting, oil resistant, ageing-resistant, the adjustable scope of hardness is large.The over-all properties of these excellences is not available for other a variety of commercialization rubber and plastics.
Compared with other materials, casting type polyurethane elastomer has unrivaled advantage for aluminium section bar is heat insulation: production sequence is simple, the technique of cast, solidification, bridge cut-off can be completed simultaneously, be applicable to mass-producing, continuous prodution, thus improve aluminium section bar production efficiency; In addition, it is effective that polyurethane elastomer also has heat-insulating and energy-saving, good mechanical performance, the advantages such as environmental protection.Therefore research and develop and promote polyurethane elastomer, for heat-insulation aluminum section, there is important practical significance.
Summary of the invention
The object of this invention is to provide the preparation method of the heat insulation encapsulating compound of a kind of aluminium section bar two component polyurethane, process industrial art performance is excellent, improve the production efficiency of aluminium section bar, the system toxicity that the present invention adopts is little, to human body and environment, there is lower hazard rating, there is certain high and low temperature resistance and shock resistance, and be applicable to the environment of rainy humidity.
The preparation method of the heat insulation encapsulating compound of aluminium section bar two component polyurethane of the present invention, be the ratio hybrid reaction of 85-100:100 in mass ratio by component A and B component, mixing temperature is 30 DEG C-35 DEG C, and be then cast in mould, ambient cure is shaping;
Wherein, component A is polyurethane prepolymer or isocyanic ester;
Polyurethane prepolymer preparation process is: after being mixed with polyether glycol 13-42 mass parts by isocyanic ester 58-87 mass parts, at 75 DEG C-85 DEG C reaction 2-3 hour, obtains the prepolymer that isocyano-content is 24%-26%;
B component: by two or more mixture formed in polyether glycol, aromatic dicarboxylic amine hardener and catalyzer.
Described isocyanic ester be in MDI-50 or liquefied mdi or PM200 one or both.MDI-50: diphenylmethanediisocyanate; PM200: polymethylene multi-phenenyl isocyanate; Liquefied mdi: the MDI of charing diimine modification.Liquefied mdi, MDI-50 and PM200 manufacturer are Yantai Wanhua Polyurethane Co., Ltd.
Massfraction shared by PM200 is 29%-100%.
In the raw materials of described polyurethane prepolymer, the functionality of polyether glycol is 2 or 3, number-average molecular weight scope 1000-3000.
In B component, aromatic dicarboxylic amine hardener massfraction is 0% ?15%, and the massfraction of polyether glycol is 84% ~ 99.8%, and the massfraction of catalyzer is 0.1% ~ 0.2%.
Aromatic dicarboxylic amine hardener massfraction is preferably 3 ?15%.
Described B component aromatic dicarboxylic amine hardener is 3,3 ˊ ?bis-chlorine ?4,4 ˊ ?diaminodiphenyl-methanes.
Catalyzer is organo-bismuth class.
Organo-bismuth class be CB ?12, CB ?18 or CB ?20.Wherein, CB ?12, CB ?18 or CB ?20 mass content representing bismuth be respectively respectively 12%, 18% and 20%.
Described B component polyether glycol is functionality is 2 or 3, number-average molecular weight be 375 ?5000.
The preferred DL1000 of polyether glycol in component A and B component: the polyether Glycols of number-average molecular weight 1000; EP ?330NG: the polyether-tribasic alcohol of number-average molecular weight 5000; DV125: the polyether-tribasic alcohol of number-average molecular weight 375; MN3050D: the polyether-tribasic alcohol of number-average molecular weight 3000.DL1000, EP ?the manufacturer of 330NG, DV125, MN3050D be Shandong Lanxing Dongda Chemical Co., Ltd.
The preferred MOCA:3 of chainextender, 3 ˊ ?Er Lv ?4,4 ˊ ?diaminodiphenyl-methane.The manufacturer of MOCA is the extraordinary Fine Chemical Co., Ltd of Suzhou Xiang Yuan.
The normal temperature hardness Shao D80 of polyurethane elastomer product ?between 85,80 DEG C of hot hardness Shao D68 ?between 79, shock strength 25 ?39KJ/m
2between.
The B component hybrid reaction casting that the present invention adopts the component A that is made up of MDI type isocyanic ester or MDI system prepolymer and is made up of polyether glycol or aromatic dicarboxylic amine hardener and catalyzer.The mixture of component A and B component has good mobility, can punch die fast, and ambient cure is shaping, and without the need to postcure process, therefore process industrial art performance is excellent, and improves the production efficiency of aluminium section bar.
In the present invention, product used is commercially available prod.
Compared with prior art, the present invention has following beneficial effect:
The present invention can punch die fast, and ambient cure is shaping, and without the need to postcure process, process industrial art performance is excellent, and improves the production efficiency of aluminium section bar.The system toxicity that the present invention adopts is little, has lower hazard rating, has certain high and low temperature resistance and shock resistance, and be applicable to the environment of rainy humidity to human body and environment.
Embodiment
Below in conjunction with embodiment, the present invention is described further.
Embodiment 1
Component A: PM200.
B component: MOCA 15%, functionality is 3, number-average molecular weight is the massfraction 55% of the polyether-tribasic alcohol DV125 of 375, functionality to be 3 number-average molecular weights be 5000 polyether-tribasic alcohol EP ?the massfraction 30% of 330NG, the massfraction 0.1% of organo-bismuth class catalyzer CB-12, above component mixes and is heated to 110 DEG C of vacuum hydro-extractions to moisture content less than 0.05%.
Component A and B component press 86:100 in 35 DEG C of hybrid reaction casting, and after 15min, die sinking characterizes goods properties.
Embodiment 2
Component A: PM200.
B component: the massfraction 59.8% of functionality to be 3 number-average molecular weights the be polyether-tribasic alcohol DV125 of 375, the massfraction 40% of functionality to be 2 number-average molecular weights the be polyether Glycols DL1000 of 1000, the massfraction 0.2% of organo-bismuth class catalyzer CB-18, above component mixes and is heated to 110 DEG C of vacuum hydro-extractions to moisture content less than 0.05%.
Component A and B component press 86:100 in 30 DEG C of hybrid reaction casting, and after 15min, die sinking characterizes goods properties.
Embodiment 3
Component A: the massfraction 13.5% of functionality to be 2 number-average molecular weights the be polyether Glycols DL1000 of 1000, the massfraction 43% of PM200, the massfraction 43.5% of MDI-50,75 DEG C of reactions 3 hours, obtains the prepolymer that isocyano-content is 24.7%.
The massfraction 15% of B component: MOCA, functionality is the massfraction 55% of the polyether-tribasic alcohol DV125 of 3 number-average molecular weights 375, the massfraction 29.9% of functionality to be 3 number-average molecular weights the be polyether-tribasic alcohol EP-330NG of 5000, the massfraction 0.1% of organo-bismuth class catalyzer CB-20, above each component mixes and is heated to 110 DEG C of vacuum hydro-extractions to moisture content less than 0.05%.
Component A and B component press 100:100 in 35 DEG C of hybrid reaction casting, and after 15min, die sinking characterizes goods properties.
Embodiment 4
Component A: the massfraction 13.5% of functionality to be 2 number-average molecular weights the be polyether Glycols DL1000 of 1000, the massfraction 43% of PM200, the massfraction 43.5% of MDI-50,85 DEG C of reactions 2 hours, obtains the prepolymer that isocyano-content is 24.7%.
B component: functionality is the massfraction 60% of the polyether-tribasic alcohol DV125 of 3 number-average molecular weights 375, the massfraction 39.8% of functionality to be 2 number-average molecular weights the be polyether Glycols DL1000 of 1000, the massfraction 0.2% of organo-bismuth class catalyzer CB-18, above component mixes and is heated to 110 DEG C of vacuum hydro-extractions to moisture content less than 0.05%.
Component A and B component press 100:100 in 35 DEG C of hybrid reaction casting, and after 15min, die sinking characterizes goods properties.
Embodiment 5
Component A: the massfraction 41.7% of functionality to be 3 number-average molecular weights the be polyether-tribasic alcohol MN3050D of 3000, the massfraction 29% of the massfraction of PM200, the massfraction 29.3% of liquefied mdi, 80 DEG C of reactions 2.5 hours, obtains the prepolymer that isocyano-content is 25.4%.
The massfraction 15% of B component: MOCA, functionality is the massfraction 54.9% of the polyether-tribasic alcohol DV125 of 3 number-average molecular weights 375, the massfraction 30% of functionality to be 3 number-average molecular weights the be polyether-tribasic alcohol EP-330NG of 5000, the massfraction 0.1% of organo-bismuth class catalyzer CB-18, mixed with last component and is heated to 110 DEG C of vacuum hydro-extractions to moisture content less than 0.05%.
Component A and B component press 100:100 in 33 DEG C of hybrid reaction casting, and after 15min, die sinking characterizes goods properties.
Embodiment 6
Component A: the massfraction 41.7% of functionality to be 3 number-average molecular weights the be polyether-tribasic alcohol MN3050D of 3000, the massfraction 29% of PM200, the massfraction 29.3% of liquefied mdi, 80 DEG C of reactions 2.5 hours, obtains the prepolymer that isocyano-content is 25.4%.
B component: functionality is the massfraction 59.9% of the polyether-tribasic alcohol DV125 of 3 number-average molecular weights 375, the massfraction 40% of functionality to be 2 number-average molecular weights the be polyether Glycols DL1000 of 1000, the massfraction 0.1% of organo-bismuth class catalyzer CB-12, above component mixes and is heated to 110 DEG C of vacuum hydro-extractions to moisture content less than 0.05%.
Component A and B component press 100:100 in 33 DEG C of hybrid reaction casting, and after 15min, die sinking characterizes goods properties.
Elastomerics prepared by above embodiment tests shock strength by GB, high temperature (80 DEG C) and low temperature (-10 DEG C) hardness, and water tolerance.Mechanics property retention rate is tested after sample being soaked 24h in water before water resistance test.
Table 1 is embodiment 1-6 the performance test results.
Table 1 embodiment 1-6 the performance test results
Claims (10)
1. the preparation method of the heat insulation encapsulating compound of aluminium section bar two component polyurethane, it is characterized in that, be the ratio hybrid reaction of 85 ~ 100:100 in mass ratio by component A and B component, mixing temperature is 30 DEG C ~ 35 DEG C, then be cast in mould, ambient cure is shaping;
Wherein, component A is polyurethane prepolymer or isocyanic ester;
Polyurethane prepolymer preparation process is: after being mixed with polyether glycol 13 ~ 42 mass parts by isocyanic ester 58 ~ 87 mass parts, 75 DEG C ~ 85 DEG C reactions 2 ~ 3 hours, obtains the prepolymer that isocyano-content is 24% ~ 26%;
B component: by two or more mixture formed in polyether glycol, aromatic dicarboxylic amine hardener and catalyzer.
2. the preparation method of the heat insulation encapsulating compound of a kind of aluminium section bar two component polyurethane according to claim 1, is characterized in that, described isocyanic ester be in MDI-50 or liquefied mdi or PM200 one or both.
3. the preparation method of the heat insulation encapsulating compound of a kind of aluminium section bar two component polyurethane according to claim 2, is characterized in that, massfraction shared by PM200 is 29% ~ 100%.
4. the preparation method of the heat insulation encapsulating compound of a kind of aluminium section bar two component polyurethane according to claim 1, is characterized in that, in the raw materials of described polyurethane prepolymer, the functionality of polyether glycol is 2 or 3, number-average molecular weight scope 1000 ~ 3000.
5. the preparation method of the heat insulation encapsulating compound of a kind of aluminium section bar two component polyurethane according to claim 1, it is characterized in that, in B component, aromatic dicarboxylic amine hardener massfraction is 0% ~ 15%, the massfraction of polyether glycol is 84% ~ 99.8%, and the massfraction of catalyzer is 0.1% ~ 0.2%.
6. the preparation method of the heat insulation encapsulating compound of a kind of aluminium section bar two component polyurethane according to claim 1 or 4, is characterized in that, described B component aromatic dicarboxylic amine hardener is chloro-4, the 4 ˊ-diaminodiphenyl-methane of 3,3 ˊ-two.
7. the preparation method of the heat insulation encapsulating compound of a kind of aluminium section bar two component polyurethane according to claim 1, is characterized in that, catalyzer is organo-bismuth class.
8. the preparation method of the heat insulation encapsulating compound of a kind of aluminium section bar two component polyurethane according to claim 1, is characterized in that, organo-bismuth class is CB-12, CB-18 or CB-20.
9. the preparation method of the heat insulation encapsulating compound of a kind of aluminium section bar two component polyurethane according to claim 1, is characterized in that, described B component polyether glycol is functionality is 2 or 3, and number-average molecular weight is 375 ~ 5000.
10. the preparation method of the heat insulation encapsulating compound of a kind of aluminium section bar two component polyurethane according to claim 1, it is characterized in that, between normal temperature hardness Shao D80 ~ 85 of polyurethane elastomer product, between 80 DEG C of hot hardness Shao D68 ~ 79, shock strength is at 25 ~ 39KJ/m
2between.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106189987A (en) * | 2016-07-12 | 2016-12-07 | 合肥新沪屏蔽泵有限公司 | A kind of encapsulating compound for condensation-proof shielded electric pump rosette and using method |
| CN110240686A (en) * | 2019-04-29 | 2019-09-17 | 山西科灜科技有限公司 | A kind of high-performance high-hard, transparent polyurethane elastomer and preparation method thereof |
| CN111072901A (en) * | 2019-12-26 | 2020-04-28 | 上海鹤城高分子科技有限公司 | Ultrahigh-hardness high-temperature-resistant casting polyurethane elastomer and preparation method thereof |
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| CN101165095A (en) * | 2007-09-29 | 2008-04-23 | 山东东大一诺威聚氨酯有限公司 | Pouring type urethane elastomer composition |
| CN102079960A (en) * | 2010-12-15 | 2011-06-01 | 佛山市南海易乐工程塑料有限公司 | Polyurethane heat-insulation structural adhesive and manufacturing method for heat-insulation aluminum profile |
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| CN111072901A (en) * | 2019-12-26 | 2020-04-28 | 上海鹤城高分子科技有限公司 | Ultrahigh-hardness high-temperature-resistant casting polyurethane elastomer and preparation method thereof |
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