CN113736418B - Modified single-component polyurethane foam joint mixture and preparation method thereof - Google Patents
Modified single-component polyurethane foam joint mixture and preparation method thereof Download PDFInfo
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- CN113736418B CN113736418B CN202111096819.9A CN202111096819A CN113736418B CN 113736418 B CN113736418 B CN 113736418B CN 202111096819 A CN202111096819 A CN 202111096819A CN 113736418 B CN113736418 B CN 113736418B
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- 239000000203 mixture Substances 0.000 title claims abstract description 41
- 229920005830 Polyurethane Foam Polymers 0.000 title claims abstract description 39
- 239000011496 polyurethane foam Substances 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 21
- 229920000570 polyether Polymers 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 19
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 14
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 14
- 229920005862 polyol Polymers 0.000 claims abstract description 14
- 150000003077 polyols Chemical class 0.000 claims abstract description 14
- 239000012188 paraffin wax Substances 0.000 claims abstract description 11
- 229920002545 silicone oil Polymers 0.000 claims abstract description 11
- HOWJQLVNDUGZBI-UHFFFAOYSA-N butane;propane Chemical compound CCC.CCCC HOWJQLVNDUGZBI-UHFFFAOYSA-N 0.000 claims abstract 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 13
- -1 polydimethylsiloxane Polymers 0.000 claims description 12
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 11
- 229910000077 silane Inorganic materials 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 9
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 8
- 239000000443 aerosol Substances 0.000 claims description 8
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 8
- 239000001294 propane Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- 229920001296 polysiloxane Polymers 0.000 claims description 7
- 238000005303 weighing Methods 0.000 claims description 6
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 claims description 5
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims description 4
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 4
- QSRJVOOOWGXUDY-UHFFFAOYSA-N 2-[2-[2-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propanoyloxy]ethoxy]ethoxy]ethyl 3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C)=CC(CCC(=O)OCCOCCOCCOC(=O)CCC=2C=C(C(O)=C(C)C=2)C(C)(C)C)=C1 QSRJVOOOWGXUDY-UHFFFAOYSA-N 0.000 claims description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 3
- 229920002554 vinyl polymer Polymers 0.000 claims description 3
- ZMSQJSMSLXVTKN-UHFFFAOYSA-N 4-[2-(2-morpholin-4-ylethoxy)ethyl]morpholine Chemical compound C1COCCN1CCOCCN1CCOCC1 ZMSQJSMSLXVTKN-UHFFFAOYSA-N 0.000 claims 6
- VOYADQIFGGIKAT-UHFFFAOYSA-N 1,3-dibutyl-4-hydroxy-2,6-dioxopyrimidine-5-carboximidamide Chemical compound CCCCn1c(O)c(C(N)=N)c(=O)n(CCCC)c1=O VOYADQIFGGIKAT-UHFFFAOYSA-N 0.000 claims 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims 1
- 150000002923 oximes Chemical class 0.000 claims 1
- 229920001558 organosilicon polymer Polymers 0.000 abstract description 16
- 238000004383 yellowing Methods 0.000 abstract description 10
- 239000003054 catalyst Substances 0.000 abstract description 9
- 239000006260 foam Substances 0.000 abstract description 8
- 239000003431 cross linking reagent Substances 0.000 abstract description 6
- 239000006097 ultraviolet radiation absorber Substances 0.000 abstract description 6
- 230000003111 delayed effect Effects 0.000 abstract description 4
- 239000002250 absorbent Substances 0.000 abstract 1
- 230000002745 absorbent Effects 0.000 abstract 1
- 229920002635 polyurethane Polymers 0.000 description 4
- 239000004814 polyurethane Substances 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000036632 reaction speed Effects 0.000 description 3
- 229910018557 Si O Inorganic materials 0.000 description 2
- 230000006750 UV protection Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 150000004982 aromatic amines Chemical class 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000021615 conjugation Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 2
- HVLLSGMXQDNUAL-UHFFFAOYSA-N triphenyl phosphite Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)OC1=CC=CC=C1 HVLLSGMXQDNUAL-UHFFFAOYSA-N 0.000 description 2
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 description 1
- QSHVAZMOLNGWSY-UHFFFAOYSA-N 3-butyl-4-methoxyphenol Chemical group CCCCC1=CC(O)=CC=C1OC QSHVAZMOLNGWSY-UHFFFAOYSA-N 0.000 description 1
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 1
- TVJPBVNWVPUZBM-UHFFFAOYSA-N [diacetyloxy(methyl)silyl] acetate Chemical compound CC(=O)O[Si](C)(OC(C)=O)OC(C)=O TVJPBVNWVPUZBM-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229930003836 cresol Natural products 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 1
- 239000011499 joint compound Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical group CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 229920005573 silicon-containing polymer Polymers 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/08—Polyurethanes from polyethers
-
- 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
- C08G18/08—Processes
- C08G18/16—Catalysts
- C08G18/161—Catalysts containing two or more components to be covered by at least two of the groups C08G18/166, C08G18/18 or C08G18/22
- C08G18/163—Catalysts containing two or more components to be covered by at least two of the groups C08G18/166, C08G18/18 or C08G18/22 covered by C08G18/18 and C08G18/22
- C08G18/165—Catalysts containing two or more components to be covered by at least two of the groups C08G18/166, C08G18/18 or C08G18/22 covered by C08G18/18 and C08G18/22 covered by C08G18/18 and C08G18/24
-
- 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
- C08G18/08—Processes
- C08G18/16—Catalysts
- C08G18/18—Catalysts containing secondary or tertiary amines or salts thereof
- C08G18/20—Heterocyclic amines; Salts thereof
- C08G18/2081—Heterocyclic amines; Salts thereof containing at least two non-condensed heterocyclic rings
-
- 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
- C08G18/08—Processes
- C08G18/16—Catalysts
- C08G18/22—Catalysts containing metal compounds
- C08G18/24—Catalysts containing metal compounds of tin
- C08G18/244—Catalysts containing metal compounds of tin tin salts of carboxylic acids
- C08G18/246—Catalysts containing metal compounds of tin tin salts of carboxylic acids containing also tin-carbon bonds
-
- 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
-
- 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
- C08G18/61—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention discloses a modified single-component polyurethane foam joint mixture and a preparation method thereof. The modified single-component polyurethane foam joint mixture is prepared from the following raw materials in percentage by weight: 5-18% of polyether polyol, 10-25% of organosilicon polymer, 0.4-0.8% of main catalyst, 0.05-0.15% of auxiliary catalyst, 0.5-2% of cross-linking agent, 0.005-0.02% of antioxidant, 0.05-0.25% of ultraviolet absorbent, 1-2% of silicone oil 8871, 30-40% of chlorinated paraffin, 10-18% of polymeric MDI, 8-15% of dimethyl ether and 4-15% of propane-butane. According to the invention, by adding the organosilicon polymer and the antioxidant and the ultraviolet absorber, yellowing of the foam beaten by the single-component polyurethane foam joint mixture can be effectively prevented and delayed, and the foam temperature resistance can be improved.
Description
Technical Field
The invention relates to the technical field of building sealing and decoration, in particular to a modified single-component polyurethane foam joint mixture and a preparation method thereof.
Background
The one-component polyurethane foam caulking agent is a foam product of polyurethane applied in the aerosol technology. The adhesive has the advantages of simple operation, convenient use, excellent adhesion, heat insulation, heat preservation and the like, and is rapidly and widely applied to the fields of building sealing, decoration and fitment and the like.
In the current market, the single-component polyurethane foam joint mixture products all use polyether polyol and polymeric MDI as main raw materials, and because the benzene ring is directly connected with isocyanate groups, the large pi bond on the benzene ring and the adjacent NCO form conjugation. Under the action of light, heat and oxygen, especially ultraviolet rays, the urethane bond is initiated to be decomposed, so that the aromatic amine is generated. After oxidation rearrangement, the benzene nucleus on the aromatic amine generates a quinoid structure and other chromophoric groups, so that the polyurethane foam is easy to yellow and can not be kept exposed to the air for a long time. Meanwhile, the heat-resistant temperature of the polyurethane foam is in the range of-20 to 120 ℃, and the polyurethane foam is over-high in temperature and easy to deform and shrink; the temperature is too low, and the foam is brittle and has poor flexibility.
Disclosure of Invention
Aiming at the technical problems, the invention aims to provide a modified single-component polyurethane foam joint mixture and a preparation method thereof. According to the invention, by adding the organosilicon polymer and the antioxidant and the ultraviolet absorber, yellowing of the foam beaten by the single-component polyurethane foam joint mixture can be effectively prevented and delayed, and the foam temperature resistance can be improved.
The technical scheme adopted by the invention is as follows: a modified single-component polyurethane foam joint mixture is prepared from the following raw materials in percentage by weight:
further, the modified one-component polyurethane foam joint mixture is characterized in that the organosilicon polymer is one or two selected from alpha, omega-dihydroxy polydimethylsiloxane and hydroxyl-terminated polyether modified polysiloxane.
Further, the main catalyst is dimorpholine diethyl ether (DMDEE).
Further, the modified one-component polyurethane foam caulking agent is characterized in that the auxiliary catalyst is selected from dibutyl tin dilaurate or stannous octoate.
Further, the modified one-component polyurethane foam joint mixture is characterized in that the cross-linking agent is selected from methyltrimethoxysilane, methyltrionoxime silane, methyltriacetoxy silane or vinyltributylketoxime silane.
Further, the modified single-component polyurethane foam joint mixture is one or two selected from dibutyl cresol, tertiary butyl p-hydroxy anisole, antioxidant 245, antioxidant 30N, sodium thiosulfate and triphenyl phosphite.
Further, the modified one-component polyurethane foam joint compound is characterized in that the ultraviolet absorber is one or two selected from UV-1, UV-196, UV NP3 and Pub-380.
A preparation method of a modified single-component polyurethane foam joint mixture comprises the following steps:
1) Preparing materials according to the proportion;
2) Sequentially adding polyether polyol, organosilicon polymer, main catalyst, auxiliary catalyst, cross-linking agent, antioxidant, ultraviolet absorber, silicone oil 8871 and chlorinated paraffin into a mixer, mixing and stirring for 1-2 hours to obtain a mixture;
3) Putting the mixture obtained in the step 2) into an aerosol can, then adding polymeric MDI, sealing, filling dimethyl ether and propane by a filling machine, capping, shaking for 30-60 hours, and standing at room temperature for 48 hours to obtain the product.
The beneficial effects of the invention are as follows:
1. in the present invention, a silicone polymer is introduced as a raw material. The molecular chain of the organosilicon polymer mainly contains Si-O bond, and the bond energy is larger than the energy of ultraviolet rays, so that the single-component polyurethane foam joint mixture added with the organosilicon polymer can keep good performance under the irradiation of ultraviolet rays, and effectively prevent or delay aging and yellowing. And because the temperature resistant range of the organosilicon polymer is between-60 and 300 ℃, the single-component polyurethane foam joint mixture introduces the organosilicon polymer structure, and the high temperature resistance and the low temperature resistance of the foam are also improved. Meanwhile, a part of organosilicon polymer can form a network structure through an auxiliary catalyst and a cross-linking agent, so that the organosilicon polymer does not need to react with more polymeric MDI, the dosage of the polymeric MDI is reduced, and the conjugation quantity of large pi bonds on benzene rings and adjacent NCO is reduced. Namely, under the action of light, heat and oxygen, especially ultraviolet rays, the number of chromophoric groups such as quinoid structures and the like is reduced, thereby preventing and delaying the yellowing trend of the product.
2. In the invention, the auxiliary catalyst plays a role in improving the reaction speed of the organosilicon polymer, and mainly dibutyl tin dilaurate or stannous octoate is selected. Because the reaction speed of the organosilicon polymer is lower than that of the polyether polyol, the reaction speed between the organosilicon polymer and the polyether polyol can be effectively improved by increasing the auxiliary catalyst, a mixed chain segment can be better formed, and the generation of an intermediate prepolymer is promoted.
3. In the invention, the cross-linking agent has the main function of changing the organosilicon polymer from chain molecules to a net cross-linking state, accelerating the curing process, and more effectively improving the structure and stability of the cured foam, thereby improving the ageing resistance and yellowing resistance of the product.
4. In the invention, the antioxidant is added, so that the peroxide free radical can be captured or the hydroperoxide can be decomposed, and the yellowing of polyurethane can be effectively prevented or delayed.
5. In the invention, the ultraviolet absorber is added, so that ultraviolet can be effectively absorbed, and yellowing of polyurethane can be prevented.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1
The modified single-component polyurethane foam joint mixture comprises the following components in proportion:
the preparation method (II) is as follows
1) Weighing various raw materials according to the proportion of the raw materials;
2) Sequentially adding the weighed polyether polyol, alpha, omega-dihydroxypolydimethylsiloxane, DMDEE, dibutyl tin dilaurate, methyltrionoxime silane, antioxidant 245, UV-196, silicone oil 8871 and chlorinated paraffin into a 1L mixer with a stirring device, and mixing and stirring for 2 hours to obtain a mixture;
3) Adding the mixture obtained in the step 2) into an aerosol can, then adding polymeric MDI, and sealing; and filling dimethyl ether and propane by a special filling machine, pressing, shaking for 60 hours at room temperature, and standing for 48 hours to obtain the modified single-component polyurethane foam joint mixture, wherein the product performance is shown in table 1.
Example 2
The modified single-component polyurethane foam joint mixture comprises the following components in proportion:
the preparation method (II) is as follows
1) Weighing various raw materials according to the proportion of the raw materials;
2) Sequentially adding weighed polyether polyol, alpha, omega-dihydroxypolydimethylsiloxane, hydroxyl-terminated polyether modified polysiloxane, DMDEE, stannous octoate, vinyl tributyl ketoxime silane, an antioxidant 30N, UV NP3, silicone oil 8871 and chlorinated paraffin into a 1L mixer with a stirring device, and mixing and stirring for 2 hours to obtain a mixture;
3) Adding the mixture obtained in the step 2) into an aerosol can, then adding polymeric MDI, and sealing; and filling dimethyl ether and propane by a special filling machine, pressing, shaking for 60 hours at room temperature, and standing for 48 hours to obtain the modified single-component polyurethane foam joint mixture, wherein the product performance is shown in table 1.
Example 3
The modified single-component polyurethane foam joint mixture comprises the following components in proportion:
the preparation method (II) is as follows
1) Weighing various raw materials according to the proportion of the raw materials;
2) Sequentially adding weighed polyether polyol, alpha, omega-dihydroxypolydimethylsiloxane, hydroxyl-terminated polyether modified polysiloxane, DMDEE, dibutyl tin dilaurate, methyltrionoxime silane, an antioxidant 30N, UV NP3, pub-380, silicone oil 8871 and chlorinated paraffin into a 1L mixer with a stirring device, and mixing and stirring for 2 hours to obtain a mixture;
3) Adding the mixture obtained in the step 2) into an aerosol can, then adding polymeric MDI, and sealing; and filling dimethyl ether and propane by a special filling machine, pressing, shaking for 60 hours at room temperature, and standing for 48 hours to obtain the modified single-component polyurethane foam joint mixture, wherein the product performance is shown in table 1.
TABLE 1 comparative Table of results for conventional one-component polyurethane foam caulking compositions and inventive embodiment data
Note that: the higher the ΔYI value, the more severe the yellowing.
As can be seen from Table 1, the modified single-component polyurethane foam caulking agent prepared by the invention improves the ultraviolet resistance and yellowing resistance of the product, and also improves the temperature resistance of the polyurethane foam. According to the invention, the Si-O bond in the polyurethane chain segment is increased by introducing the organosilicon polymer, the ultraviolet resistance is increased, the dosage of polymeric MDI is reduced, the generation of chromophoric groups is reduced, the chain segment network structure is improved by adding the cross-linking agent, and yellowing of the single-component polyurethane foam joint filling agent is prevented or delayed by adding the antioxidant and the ultraviolet absorber. Meanwhile, si-O bonds are introduced into the molecular chains and a net structure is enlarged, so that the high temperature resistance and the low temperature resistance of the single-component polyurethane foam joint mixture are improved.
Claims (3)
1. The modified single-component polyurethane foam gap filler is characterized by being prepared from the following raw materials in parts by weight:
polyether polyol 76.8. 76.8 g
Alpha, omega-dihydroxy polydimethylsiloxane 96 g
DMDEE 3.84 g
Dibutyl tin dilaurate 0.48 g
Methyl trione oxime silane 4.8g
Antioxidant 245.1 g
UV-196 0.48 g
Silicone oil 8871.6 g
287.9g of chlorinated paraffin
Polymeric MDI 113g
Dimethyl ether 75 g
Propane 82 g
The preparation method comprises the following steps:
1) Weighing various raw materials according to the proportion of the raw materials;
2) Sequentially adding the weighed polyether polyol, alpha, omega-dihydroxypolydimethylsiloxane, DMDEE, dibutyl tin dilaurate, methyltrionoxime silane, antioxidant 245, UV-196, silicone oil 8871 and chlorinated paraffin into a 1L mixer with a stirring device, and mixing and stirring for 2 hours to obtain a mixture;
3) Adding the mixture obtained in the step 2) into an aerosol can, then adding polymeric MDI, and sealing; and filling dimethyl ether and propane by a filling machine, capping, shaking for 60 hours, and standing at room temperature for 48 hours to obtain the modified single-component polyurethane foam joint mixture.
2. The modified single-component polyurethane foam gap filler is characterized by being prepared from the following raw materials in parts by weight:
polyether polyol 65.9 g
Alpha, omega-dihydroxy polydimethylsiloxane 84.8 g
Hydroxyl terminated polyether modified polysiloxane 33 g
DMDEE 2.8 g
Stannous octoate 0.7. 0.7 g
Vinyl tributylketoximino silane 7g
Antioxidant 30N 0.05g
UV NP3 0.45 g
Silicone oil 8871.1 g
Chlorinated paraffin 262.2 g
Polymeric MDI 122g
Dimethyl ether 72g
Propane butane 85g
The preparation method comprises the following steps:
1) Weighing various raw materials according to the proportion of the raw materials;
2) Sequentially adding weighed polyether polyol, alpha, omega-dihydroxypolydimethylsiloxane, hydroxyl-terminated polyether modified polysiloxane, DMDEE, stannous octoate, vinyl tributyl ketoxime silane, an antioxidant 30N, UV NP3, silicone oil 8871 and chlorinated paraffin into a 1L mixer with a stirring device, and mixing and stirring for 2 hours to obtain a mixture;
3) Adding the mixture obtained in the step 2) into an aerosol can, then adding polymeric MDI, and sealing; and filling dimethyl ether and propane by a filling machine, capping, shaking for 60 hours, and standing at room temperature for 48 hours to obtain the modified single-component polyurethane foam joint mixture.
3. The modified single-component polyurethane foam gap filler is characterized by being prepared from the following raw materials in parts by weight:
polyether polyol 59.4g
Alpha, omega-dihydroxy polydimethylsiloxane 89 g
Hydroxyl-terminated polyether modified polysiloxane 35 g
DMDEE 3 g
Dibutyl tin dilaurate 0.74. 0.74 g
Methyltrionooximino silane 9.9g
Antioxidant 30N 0.1g
UV NP3 0.6g
Pub-380 0.4g
Silicone oil 8871.4 g
Chlorinated paraffin 284.46g
Polymeric MDI 98g
Dimethyl ether 80g
Propane-butane 77g
The preparation method comprises the following steps:
1) Weighing various raw materials according to the proportion of the raw materials;
2) Sequentially adding weighed polyether polyol, alpha, omega-dihydroxypolydimethylsiloxane, hydroxyl-terminated polyether modified polysiloxane, DMDEE, dibutyl tin dilaurate, methyltrionoxime silane, an antioxidant 30N, UV NP3, pub-380, silicone oil 8871 and chlorinated paraffin into a 1L mixer with a stirring device, and mixing and stirring for 2 hours to obtain a mixture;
3) Adding the mixture obtained in the step 2) into an aerosol can, then adding polymeric MDI, and sealing; and filling dimethyl ether and propane by a filling machine, capping, shaking for 60 hours, and standing at room temperature for 48 hours to obtain the modified single-component polyurethane foam joint mixture.
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| CN105969287A (en) * | 2016-05-31 | 2016-09-28 | 苏州市奎克力电子科技有限公司 | Transparent waterproof encapsulating material |
| CN106317854A (en) * | 2016-08-24 | 2017-01-11 | 广东三和化工科技有限公司 | Single-component polyurethane foam joint mixture and preparing method thereof |
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| CN1616577A (en) * | 2004-09-21 | 2005-05-18 | 济南大学 | Organic silicon modified polyurethane gap-filling rubber for cement road |
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| CN109628052A (en) * | 2018-11-01 | 2019-04-16 | 保定赞伯商贸有限公司 | A kind of polyurethane gap filler and preparation method thereof |
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