CN116004172A - Bio-based reactive single-component polyurethane hot melt adhesive with low free isocyanate content, and preparation method and application thereof - Google Patents
Bio-based reactive single-component polyurethane hot melt adhesive with low free isocyanate content, and preparation method and application thereof Download PDFInfo
- Publication number
- CN116004172A CN116004172A CN202211717285.1A CN202211717285A CN116004172A CN 116004172 A CN116004172 A CN 116004172A CN 202211717285 A CN202211717285 A CN 202211717285A CN 116004172 A CN116004172 A CN 116004172A
- Authority
- CN
- China
- Prior art keywords
- bio
- low free
- hot melt
- melt adhesive
- free isocyanate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000012948 isocyanate Substances 0.000 title claims abstract description 85
- 150000002513 isocyanates Chemical class 0.000 title claims abstract description 85
- 239000004831 Hot glue Substances 0.000 title claims abstract description 75
- 239000004814 polyurethane Substances 0.000 title claims abstract description 75
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 72
- 238000002360 preparation method Methods 0.000 title description 5
- 229920005862 polyol Polymers 0.000 claims abstract description 57
- 229920001730 Moisture cure polyurethane Polymers 0.000 claims abstract description 55
- 150000003077 polyols Chemical class 0.000 claims abstract description 55
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 35
- 229920000570 polyether Polymers 0.000 claims abstract description 35
- 229920005906 polyester polyol Polymers 0.000 claims abstract description 28
- 229920005989 resin Polymers 0.000 claims abstract description 25
- 239000011347 resin Substances 0.000 claims abstract description 25
- 239000003054 catalyst Substances 0.000 claims abstract description 11
- 239000000178 monomer Substances 0.000 claims description 36
- 238000003756 stirring Methods 0.000 claims description 28
- 238000006243 chemical reaction Methods 0.000 claims description 21
- 239000000047 product Substances 0.000 claims description 18
- 238000007789 sealing Methods 0.000 claims description 14
- 239000003208 petroleum Substances 0.000 claims description 12
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 claims description 10
- 239000004925 Acrylic resin Substances 0.000 claims description 9
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 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 9
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 9
- 239000005056 polyisocyanate Substances 0.000 claims description 8
- 229920001228 polyisocyanate Polymers 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 6
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 claims description 6
- ZMSQJSMSLXVTKN-UHFFFAOYSA-N 4-[2-(2-morpholin-4-ylethoxy)ethyl]morpholine Chemical compound C1COCCN1CCOCCN1CCOCC1 ZMSQJSMSLXVTKN-UHFFFAOYSA-N 0.000 claims description 5
- 229920005749 polyurethane resin Polymers 0.000 claims description 5
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 4
- 229920000178 Acrylic resin Polymers 0.000 claims description 4
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 4
- 239000007806 chemical reaction intermediate Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 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 4
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 4
- HVCNXQOWACZAFN-UHFFFAOYSA-N 4-ethylmorpholine Chemical compound CCN1CCOCC1 HVCNXQOWACZAFN-UHFFFAOYSA-N 0.000 claims description 3
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims description 3
- 229920013640 amorphous poly alpha olefin Polymers 0.000 claims description 3
- 238000006757 chemical reactions by type Methods 0.000 claims description 3
- 150000003505 terpenes Chemical class 0.000 claims description 3
- 235000007586 terpenes Nutrition 0.000 claims description 3
- 229920001169 thermoplastic Polymers 0.000 claims description 3
- 239000004416 thermosoftening plastic Substances 0.000 claims description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical class OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 abstract description 6
- 230000001070 adhesive effect Effects 0.000 abstract description 6
- 150000002009 diols Chemical class 0.000 description 27
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 22
- 229920000728 polyester Polymers 0.000 description 17
- 239000002994 raw material Substances 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 15
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 14
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 8
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 8
- 238000011161 development Methods 0.000 description 7
- -1 pentaerythritol ester Chemical class 0.000 description 7
- 239000000126 substance Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 239000004417 polycarbonate Substances 0.000 description 5
- 229920000515 polycarbonate Polymers 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- 239000004359 castor oil Substances 0.000 description 4
- 235000019438 castor oil Nutrition 0.000 description 4
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000000539 dimer Substances 0.000 description 3
- 239000012467 final product Substances 0.000 description 3
- 229960004063 propylene glycol Drugs 0.000 description 3
- 238000007348 radical reaction Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-UHFFFAOYSA-N 0.000 description 2
- ALQLPWJFHRMHIU-UHFFFAOYSA-N 1,4-diisocyanatobenzene Chemical compound O=C=NC1=CC=C(N=C=O)C=C1 ALQLPWJFHRMHIU-UHFFFAOYSA-N 0.000 description 2
- SBJCUZQNHOLYMD-UHFFFAOYSA-N 1,5-Naphthalene diisocyanate Chemical compound C1=CC=C2C(N=C=O)=CC=CC2=C1N=C=O SBJCUZQNHOLYMD-UHFFFAOYSA-N 0.000 description 2
- LFSYUSUFCBOHGU-UHFFFAOYSA-N 1-isocyanato-2-[(4-isocyanatophenyl)methyl]benzene Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=CC=C1N=C=O LFSYUSUFCBOHGU-UHFFFAOYSA-N 0.000 description 2
- LJPCNSSTRWGCMZ-UHFFFAOYSA-N 3-methyloxolane Chemical compound CC1CCOC1 LJPCNSSTRWGCMZ-UHFFFAOYSA-N 0.000 description 2
- 208000005623 Carcinogenesis Diseases 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 2
- 239000005058 Isophorone diisocyanate Substances 0.000 description 2
- IIGAAOXXRKTFAM-UHFFFAOYSA-N N=C=O.N=C=O.CC1=C(C)C(C)=C(C)C(C)=C1C Chemical compound N=C=O.N=C=O.CC1=C(C)C(C)=C(C)C(C)=C1C IIGAAOXXRKTFAM-UHFFFAOYSA-N 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-L adipate(2-) Chemical compound [O-]C(=O)CCCCC([O-])=O WNLRTRBMVRJNCN-UHFFFAOYSA-L 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- JGCWKVKYRNXTMD-UHFFFAOYSA-N bicyclo[2.2.1]heptane;isocyanic acid Chemical compound N=C=O.N=C=O.C1CC2CCC1C2 JGCWKVKYRNXTMD-UHFFFAOYSA-N 0.000 description 2
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 2
- 230000036952 cancer formation Effects 0.000 description 2
- 231100000504 carcinogenesis Toxicity 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- KORSJDCBLAPZEQ-UHFFFAOYSA-N dicyclohexylmethane-4,4'-diisocyanate Chemical compound C1CC(N=C=O)CCC1CC1CCC(N=C=O)CC1 KORSJDCBLAPZEQ-UHFFFAOYSA-N 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 2
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229920001451 polypropylene glycol Polymers 0.000 description 2
- YPFDHNVEDLHUCE-UHFFFAOYSA-N propane-1,3-diol Chemical compound OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 2
- 150000003254 radicals Chemical class 0.000 description 2
- 210000002345 respiratory system Anatomy 0.000 description 2
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 2
- RUELTTOHQODFPA-UHFFFAOYSA-N toluene 2,6-diisocyanate Chemical compound CC1=C(N=C=O)C=CC=C1N=C=O RUELTTOHQODFPA-UHFFFAOYSA-N 0.000 description 2
- YRTNMMLRBJMGJJ-UHFFFAOYSA-N 2,2-dimethylpropane-1,3-diol;hexanedioic acid Chemical compound OCC(C)(C)CO.OC(=O)CCCCC(O)=O YRTNMMLRBJMGJJ-UHFFFAOYSA-N 0.000 description 1
- DCKDPDONFMIQBA-UHFFFAOYSA-N 2,2-dimethylpropane-1,3-diol;phthalic acid Chemical compound OCC(C)(C)CO.OC(=O)C1=CC=CC=C1C(O)=O DCKDPDONFMIQBA-UHFFFAOYSA-N 0.000 description 1
- 230000005526 G1 to G0 transition Effects 0.000 description 1
- 244000068988 Glycine max Species 0.000 description 1
- 235000010469 Glycine max Nutrition 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 230000000172 allergic effect Effects 0.000 description 1
- 208000010668 atopic eczema Diseases 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000010812 external standard method Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 230000000622 irritating effect Effects 0.000 description 1
- JJTUDXZGHPGLLC-UHFFFAOYSA-N lactide Chemical compound CC1OC(=O)C(C)OC1=O JJTUDXZGHPGLLC-UHFFFAOYSA-N 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002464 physical blending Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 229920013639 polyalphaolefin Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 238000004154 testing of material Methods 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
Abstract
The invention belongs to the field of polyurethane adhesives, and relates to a bio-based reactive single-component polyurethane hot melt adhesive with low free isocyanate content, which comprises the following components: the bio-based polyol, the low free polyether polyol-based polyurethane prepolymer, the low free polyester polyol-based polyurethane prepolymer, the tackifying resin and the catalyst, wherein the free isocyanate content of the low free polyether polyol-based polyurethane prepolymer is less than 0.1%, and the free isocyanate content of the low free polyester polyol-based polyurethane prepolymer is less than 0.1%. The bio-based reactive single-component polyurethane hot melt adhesive with low free isocyanate content has the characteristics of low melt viscosity, long opening time, high bonding strength and low free isocyanate content (< 0.1 wt%).
Description
Technical Field
The invention belongs to the field of bio-based polyurethane adhesives, and particularly relates to a bio-based reactive single-component polyurethane hot melt adhesive with low free isocyanate content, and a preparation method and application thereof.
Background
The conventional reactive polyurethane hot melt adhesive (PUR) is a polyurethane prepolymer prepared by reacting excessive isocyanate with polyol, and unreacted free isocyanate is often present in the final product due to excessive isocyanate, insufficient reaction of polyol with excessive isocyanate, reaction resistance under high viscosity and the like. The free isocyanate monomers can gasify to form irritating, allergic or toxic substances at 85-200 ℃ and further harm the health of the practitioner. Free isocyanate limiting draft by the european chemical administration (ECHA) shows that: when the free isocyanate content in the reactive polyurethane hotmelt is >1wt%, there is a risk of carcinogenesis; if the free isocyanate content is between 0.1 and 1% by weight, there is a risk of inhalation or skin contact; products having a free isocyanate content of more than 0.1% by weight will be of limited use in industry and in certain professions unless the safety of the user is protected. Whereas products with a free isocyanate content of <0.1wt% can be freed from this regulatory limitation.
The traditional reactive polyurethane hot melt adhesive is prepared from petroleum-based chemical raw materials, and the petroleum-based chemical raw materials are non-renewable raw materials, have no sustainability and are unfavorable for realizing sustainable development. The production of chemical raw materials from bio-based raw materials is an important way for realizing sustainable development, and the research of the existing bio-based products has become one of important research directions in the world science and technology field, and the development of bio-based products is receiving more and more attention. The existing bio-based reactive polyurethane hot melt adhesive is mainly prepared by reacting bio-based polyol with excessive isocyanate monomer, and although the use of bio-based polyol increases the use amount of renewable raw materials and enhances the development sustainability, the product has high content of free isocyanate monomer, so that the product can stimulate human respiratory tract, has cancerogenic risk and can harm the health of related practitioners.
In the prior art, low free isocyanate oligomer with the free isocyanate content less than 0.1% is used to replace isocyanate monomer to react with polyol to prepare the reactive polyurethane hot melt adhesive with low free isocyanate, for example, bayer low free MDI oligomer VPLS2397 with equimolar amount is used to replace MDI monomer to react with polyol in patent US20170002239A to prepare the reactive polyurethane hot melt adhesive, and the free MDI monomer of the final product is less than 0.1wt%, but the biological polyol is not used, but the reactive polyurethane hot melt adhesive is not the biological based reactive polyurethane hot melt adhesive. Moreover, the bulk strength of reactive polyurethane hot melt adhesives prepared using VPLS2397 equimolar amounts instead of MDI monomers was significantly reduced.
In summary, the prior art mainly has the following problems:
(1) The reactive polyurethane hot melt adhesive is produced by petroleum-based raw materials, wherein the petroleum-based raw materials are non-renewable raw materials and are not sustainable;
(2) The existing bio-based reactive polyurethane hot melt adhesive (PUR) is a polyurethane prepolymer prepared by reacting excessive isocyanate monomers with bio-based polyol, and the free isocyanate monomers often exist in the final product by about 1-4wt% due to the excessive isocyanate monomers. Although the use of bio-based polyols increases the amount of renewable raw materials and enhances the sustainability of development, the presence of free isocyanate monomers in the product stimulates the human respiratory tract and carries a risk of carcinogenesis, jeopardizing the physical health of the relevant practitioner;
(3) The low free reaction type polyurethane hot melt adhesive prepared by the prior art is a non-biological base product prepared by petroleum-based polyol and isocyanate prepolymer, and is not sustainable.
Therefore, development of a bio-based single-component reactive polyurethane hot melt adhesive with low content of free isocyanate is urgently needed to meet the application requirements of the low-free bio-based single-component reactive polyurethane hot melt adhesive in the fields of automobiles, new energy sources, consumer electronics and the like.
Disclosure of Invention
The invention aims to overcome the defects that the traditional reactive polyurethane hot melt adhesive is not environment-friendly enough and excessive free isocyanate monomer exists, which is harmful to the health of operators, and the traditional low free isocyanate PUR has insufficient bonding performance, and provides the bio-based reactive single-component polyurethane hot melt adhesive with low free isocyanate content.
The second aim of the invention is to provide a preparation method of the bio-based reactive single-component polyurethane hot melt adhesive.
The third object of the invention is to provide the application of the bio-based reactive single-component polyurethane hot melt adhesive in the bonding and sealing of electronic consumer products, new energy batteries and automobiles.
Specifically, the invention provides a bio-based reactive single-component polyurethane hot melt adhesive with low free isocyanate content, which comprises the following components:
a bio-based polyol;
low free polyether polyol-based polyurethane prepolymers;
low free polyester polyol-based polyurethane prepolymers;
a tackifying resin;
a catalyst;
the low free polyether polyol-based polyurethane prepolymer has a free isocyanate content of less than 0.1wt%;
the low free polyester polyol based polyurethane prepolymer has a free isocyanate content of less than 0.1wt%.
The bio-based reactive type single-component polyurethane hot melt adhesive with low free isocyanate content is characterized in that the molar equivalent ratio of hydroxyl groups in bio-based polyol to isocyanate groups in low free polyether polyol polyurethane prepolymer is 1 (2.5-4.5).
The bio-based reactive single-component polyurethane hot melt adhesive with low content of free isocyanate comprises, by weight, 10-25% of low-free polyester polyol-based polyurethane prepolymer, 10-20% of tackifying resin and 0.1-1% of catalyst based on the total weight of the bio-based reactive single-component polyurethane hot melt adhesive.
The bio-based reactive single-component polyurethane hot melt adhesive with low free isocyanate content is characterized in that the bio-based polyol is polyol which can be completely or partially prepared by the reaction of one or more bio-based monomer raw materials.
The bio-based reactive single-component polyurethane hot melt adhesive with low free isocyanate content is characterized in that the low free polyether polyol-based polyurethane prepolymer is obtained by reacting polyether polyol with polyisocyanate monomers.
The bio-based reactive single-component polyurethane hot melt adhesive with low free isocyanate content is characterized in that the low free polyester polyol-based polyurethane prepolymer is obtained by reacting polyester polyol with polyisocyanate monomers.
In the present invention, both ends of the low free polyether polyol-based polyurethane prepolymer and the low free polyester polyol-based polyurethane prepolymer are blocked with isocyanate groups.
The bio-based reactive single-component polyurethane hot melt adhesive with low free isocyanate content is characterized in that the catalyst is selected from one or more of dibutyl tin dilaurate, stannous octoate, triethylamine, diethylenetriamine, triethylenediamine, N-ethylmorpholine and 2, 2-dimorpholinodiethyl ether.
The bio-based reactive single-component polyurethane hot melt adhesive with low free isocyanate content is characterized in that the tackifying resin is one or more selected from thermoplastic acrylic resin, polyurethane resin, amorphous poly alpha olefin resin, rosin pentaerythritol ester, petroleum resin, terpene resin and EVA resin.
The invention also provides a preparation method of the bio-based reactive single-component polyurethane hot melt adhesive with low free isocyanate content, which comprises the following steps:
s1: vacuum stirring and dehydrating the bio-based polyol and tackifying resin at the temperature of 100-120 ℃ at the rotating speed of 100-200r/min for 1-5h, and then cooling to 70-90 ℃ to obtain a pretreatment product;
s2: adding low free polyether polyol polyurethane prepolymer and catalyst into the pretreated product, and vacuum stirring at a rotating speed of 100-200r/min at 70-90 ℃ for reaction for 1-5h to obtain a reaction intermediate product;
s3: adding low free polyester polyol polyurethane prepolymer into the reaction intermediate product, vacuum stirring and mixing for 30min-2h at the temperature of 70-90 ℃ and the rotating speed of 100-200r/min, discharging to obtain the bio-based reaction type single-component polyurethane hot melt adhesive with low free isocyanate content, and vacuum sealing and preserving.
The invention also provides application of the bio-based reactive single-component polyurethane hot melt adhesive with low free isocyanate content in bonding and sealing of electronic consumer products, automobiles and new energy batteries.
Because of the large difference between the low free polyurethane prepolymer (the content of free isocyanate is less than 0.1 wt%) and the isocyanate monomer, the low free reactive polyurethane hot melt adhesive prepared by simply reacting the same molar amount of the substituted isocyanate monomer of the low free polyurethane prepolymer with the polyol has large performance defects such as high melt viscosity, short opening time, low bonding strength and the like. The invention uses bio-based polyol to react with excessive low free polyurethane prepolymer (the content of free isocyanate is less than 0.1 wt%) and then further adds the low free prepolymer to adjust the melt viscosity, opening time and bonding strength of the system. The invention prepares the bio-based reactive polyurethane hot melt adhesive with low free isocyanate content by combining chemical reaction and physical blending through using commercially available bio-based polyol, low free polyether polyol-based polyurethane prepolymer, low free polyester polyol-based polyurethane prepolymer, tackifying resin and catalyst. The bio-based reactive polyurethane hot melt adhesive prepared by the method has the characteristics of low melt viscosity, long opening time, high adhesive strength and low free isocyanate content (< 0.1 wt%).
Detailed Description
Examples of the bio-based monomer raw materials include succinic acid, adipic acid, sebacic acid, dimerized fatty acid, 1, 2-propylene glycol, 1, 3-propylene glycol, 1, 4-butanediol, C2-C4 diol, C8-C16 dicarboxylic acid, C6-C12 lactide, castor oil, and polyhydric alcohols derived from the same; the source of the bio-based monomer raw material can be renewable raw materials such as wheat, straw, corn, soybean, castor oil and the like; examples of commercially available bio-based polyols include Evonik Dynacoll Terra EP481.01, dynacoll Terra EP480.01, dynacoll Terra EP480.02, dynacoll Terra EP424.01, dynacoll Terra EP424.02, dynacoll Terra EP413.01, dynacoll Terra EP413.02, dynacoll Terra EP413.03, dynacoll Terra EP413.04, croda's Priplast3238, priplast 1838, allessa GmbH's Velvetol H2000.
As the low free polyether polyol-based polyurethane prepolymer, the content of free isocyanate is less than 0.1wt%. The low free polyether polyol based polyurethane prepolymer may be obtained by reacting a polyether polyol with a polyisocyanate monomer. Wherein the polyether polyol can be ring-opening polymer of ethylene glycol, propylene glycol, tetrahydrofuran, 3-methyltetrahydrofuran or one or more of random copolymer or block copolymer of ethylene glycol, propylene glycol, tetrahydrofuran, 3-methyltetrahydrofuran or derivatives thereof. The polyisocyanate monomer may be one or more of isophorone diisocyanate, 2, 4-toluene diisocyanate, 2, 6-toluene diisocyanate, hexamethylene diisocyanate, diphenylmethane-4, 4 '-diisocyanate, diphenylmethane-2, 4' -diisocyanate, hydrogenated MDI, polymeric MDI, 1, 5-naphthalene diisocyanate, 1, 4-benzene diisocyanate, xylylene diisocyanate, tetramethylxylene diisocyanate, and norbornane diisocyanate. As commercial raw materials for the low-free polyether polyol-based polyurethane prepolymer, there may be mentioned, for example, adiprene LF TE915, adiprene LF TE1050, adiprene LF TE980, adiprene LF TE 330, adiprene LF TE 365, adiprene LF TE440, adiprene LFM G730, adiprene LFM G750, adiprene LFM G600, adiprene LFMI G1000.
As the low free polyester polyol-based polyurethane prepolymer, the content of free isocyanate is less than 0.1wt%. The low free polyester polyol based polyurethane prepolymer may be obtained by reacting a polyester polyol with a polyisocyanate monomer. The polyester polyol can be one or more of polyethylene glycol adipate glycol, polypropylene glycol adipate glycol, polybutylene 1, 4-butanediol adipate glycol, neopentyl glycol adipate glycol and polyhexamethylene 1, 6-hexanediol adipate glycol. The polyisocyanate monomer may be one or more of isophorone diisocyanate, 2, 4-toluene diisocyanate, 2, 6-toluene diisocyanate, hexamethylene diisocyanate, diphenylmethane-4, 4 '-diisocyanate, diphenylmethane-2, 4' -diisocyanate, hydrogenated MDI, polymeric MDI, 1, 5-naphthalene diisocyanate, 1, 4-benzene diisocyanate, xylylene diisocyanate, tetramethylxylene diisocyanate, and norbornane diisocyanate. As commercial raw materials for the low-free polyester polyol-based polyurethane prepolymer, there may be mentioned, for example, adiprene LFM S200, adiprene LFM S300, adiprene LFM S500 and the like.
The tackifying resin may be one or more of thermoplastic acrylic resins, polyurethane resins, amorphous polyalphaolefin resins, rosin resins, pentaerythritol rosin esters, petroleum resins, terpene resins, and EVA resins.
The catalyst compound may be one or more of dibutyltin dilaurate, stannous octoate, triethylamine, diethylenetriamine, triethylenediamine, N-ethylmorpholine and 2, 2-dimorpholinodiethyl ether.
In the following examples and comparative examples, bio-based polyester diols having the designations Dynacoll Terra EP Terra 481.01, dynacoll Terra EP terra424.01 were purchased from Evonik corporation; bio-based polyester diol having the brand Stepanpol PDP70 is available from Stepan corporation; bio-based polyether diol with the trade designation Velvetol H2000 is available from Allessa company; the bio-based dimer acid polyester diol with the trade name Priplast3238 is purchased from Croda company; the bio-based dimer acid polyester diol with the trade designation 7287 is purchased from Shanghai Ming's research technology Co., ltd; the bio-based castor oil derivative diol with the brand name Polycin D2000 is available from Vertellus company; low free polyurethane prepolymers with the designations Adiprene LF TE915, adiprene LF TE1050, adiprene LF TE980, adiprene LF900A, adiprene LF TE440, adiprene LF G730, adiprene LF S200, adiprene LF S300, adiprene LF S500 are available from Langsheng.
Example 1
25.4g (7.258 mmol) of bio-based polyester diol Dynacoll Terra EP481.01 having a number average molecular weight of 3500, 14.5g (7.258 mmol) of bio-based polyether diol Velvetol H2000 having a number average molecular weight of 2000, 10g of polyurethane resin Pearlbond539 were added by weight to a reaction flask, heated to 110℃and dehydrated in vacuo under 150r/min stirring for 2 hours; then cooling to 80 ℃, adding 40.0g (43.55 mmol) of low free polyether polyol-based polyurethane prepolymer Adiprene LF TE915 with isocyanate functional groups at two ends and 0.1g of dibutyltin dilaurate, and reacting for 2 hours under the stirring condition of 150 r/min; then 10.0g of low free polyester polyol based polyurethane prepolymer Adiprene LFM S300 is added, mixed for 1h under the stirring condition of 150r/min and discharged, and the bio-based reactive type single-component polyurethane hot melt adhesive with low free isocyanate content is obtained and stored in a vacuum sealing way.
Example 2
26.4g (7.549 mmol) of bio-based polyester diol Dynacoll Terra EP424.01 having a number average molecular weight of 3500, 12.1g (7.549 mmol) of bio-based polyester diol Stepanpol PDP70 having a number average molecular weight of 1600, 15.0g of polyurethane resin Pearlbond 523 are added by weight to a reaction flask, heated to 110 ℃, and dehydrated in vacuum under 150r/min stirring for 2 hours; then cooling to 80 ℃, adding 31.4g (39.25 mmol) of low free polyether polyol-based polyurethane prepolymer Adiprene LF TE1050 with isocyanate functional groups at two ends and 0.1g of stannous octoate, and reacting for 2 hours under the stirring condition of 150 r/min; then 15.0g of low free polyester polyol based polyurethane prepolymer Adiprene LFM S200 is added, mixed for 1h under the stirring condition of 150r/min and discharged, and the bio-based reactive type single-component polyurethane hot melt adhesive with low free isocyanate content is obtained and stored in a vacuum sealing way.
Example 3
14.6g (7.324 mmol) of bio-based dimer acid polyester diol Priplast3238 with a number average molecular weight of 2000, 14.6g (7.324 mmol) of bio-based castor oil derivative diol Vertellus polycin D with a number average molecular weight of 2000, 20.0g of acrylic resin BR106 are added into a reaction flask, heated to 110℃and dehydrated in vacuo under 150r/min stirring for 2h; then cooling to 80 ℃, adding 37.7g (43.94 mmol) of low free polyether polyol-based polyurethane prepolymer Adiprene LF TE980 with isocyanate functional groups at two ends and 1.0g of 2, 2-dimorpholinodiethyl ether, and reacting for 2 hours under the stirring condition of 150 r/min; then adding 12.0g of low free polyester polyol based polyurethane prepolymer Adiprene LFM S500, mixing for 1h under the stirring condition of 150r/min, discharging to obtain the bio-based reactive single-component polyurethane hot melt adhesive with low free isocyanate content, and preserving in a vacuum sealing way.
Example 4
12.6g (3.597 mmol) of bio-based polyester diol Dynacoll Terra EP424.01 having a number average molecular weight of 3500, 3.6g (1.798 mmol) of bio-based polyether diol Velvetol H2000 having a number average molecular weight of 2000, 11.0g of poly-alpha-olefin resin VESTOPLAST 520 were added by weight to a reaction flask, heated to 110℃and dehydrated in vacuo under 150r/min stirring for 2H; then cooling to 80 ℃, adding 47.2g (21.58 mmol) of low free polyether polyol-based polyurethane prepolymer Adiprene LF TE440 with isocyanate functional groups at two ends and 0.6g of 2, 2-dimorpholinodiethyl ether, and reacting for 2 hours under the stirring condition of 150 r/min; then adding 25.0g of low free polyester polyol based polyurethane prepolymer Adiprene LFM S500, mixing for 1h under the stirring condition of 150r/min, discharging to obtain the bio-based reactive single-component polyurethane hot melt adhesive with low free isocyanate content, and preserving in a vacuum sealing way.
Comparative example 1
3.46g (9.872 mmol) of polyhexamethylene adipate glycol having a number average molecular weight of 3500, 19.7g (9.872 mmol) of polyoxypropylene ether glycol having a number average molecular weight of 2000, 15.8g (9.872 mmol) of neopentyl glycol phthalate glycol having a number average molecular weight of 1600, 15.0 parts of polyacrylic resin BM751 are added by weight to a reaction flask, heated to 110℃and dehydrated in vacuo under 150r/min stirring for 2 hours; then 14.8g (59.23 mmol) of 4,4' -diphenylmethane diisocyanate (MDI) and 0.1 part of dibutyltin dilaurate are added, the mixture is reacted for 2 hours at a stirring speed of 150r/min under vacuum condition and discharged, and the traditional petroleum-based reactive polyurethane hot melt adhesive is obtained and stored in a vacuum sealing mode.
Comparative example 2
3.46g (9.872 mmol) of bio-based polyester diol Dynacoll Terra EP481.01 having a number average molecular weight of 3500, 19.7g (9.872 mmol) of bio-based polyether diol Velvetol H2000 having a number average molecular weight of 2000, 15.8g (9.872 mmol) of bio-based polyester diol Stepanpol PDP70 having a number average molecular weight of 1600, 15.0 parts of polyacrylic resin BM751 were added by weight to a reaction flask, heated to 110℃and dehydrated in vacuo under 150r/min stirring for 2 hours; then 14.8g (59.23 mmol) of 4,4' -diphenylmethane diisocyanate (MDI) and 0.1 part of dibutyltin dilaurate are added, the mixture is reacted for 2 hours at a stirring speed of 150r/min under vacuum condition and discharged, and the traditional bio-based reactive polyurethane hot melt adhesive is obtained and stored in a vacuum sealing way.
Comparative example 3
14.7g (4.197 mmol) of bio-based polyester diol Dynacoll Terra EP481.01 having a number average molecular weight of 3500, 8.4g (4.197 mmol) of bio-based polyether diol Velvetol H2000 having a number average molecular weight of 2000, 6.7g (4.197 mmol) of bio-based polyester diol Stepanpol PDP70 having a number average molecular weight of 1600, 15.0 parts of polyacrylic resin BM751 were added to a reaction flask, heated to 110℃and dehydrated in vacuo with stirring at 150r/min for 2 hours; then 55.1g (25.18 mmol) of low free polyether polyol-based polyurethane prepolymer Adiprene LF900A with isocyanate functional groups at two ends and 0.1 part of dibutyltin dilaurate are added, the mixture is discharged after being reacted for 2 hours at a stirring speed of 150r/min under a vacuum condition, and the low free polyether polyol-based polyurethane prepolymer is obtained to replace the low free radical biological radical reaction type polyurethane hot melt adhesive prepared by the reaction of isocyanate monomers and biological radical polyols and is stored in a vacuum sealing way.
Comparative example 4
12.4g (3.552 mmol) of the bio-based polyester diol having a number average molecular weight of 3500, dynacoll Terra EP481.01, 7.1g (3.552 mmol) of the bio-based polyether diol having a number average molecular weight of 2000, velvetol H2000, 5.7g (3.552 mmol) of the bio-based polyester diol having a number average molecular weight of 1600, stepanpol PDP70, 15.0 parts of the polyacrylic resin BM751 were added to a reaction flask, heated to 110℃and dehydrated in vacuo under 150r/min of stirring for 2 hours; then 59.7g (21.31 mmol) of low free polyester polyol-based polyurethane prepolymer Adiprene S300 with isocyanate functional groups at two ends and 0.1 part of dibutyltin dilaurate are added, the mixture is discharged after being reacted for 2 hours at a stirring speed of 150r/min under a vacuum condition, and the low free polyester polyol-based polyurethane prepolymer is prepared to replace low free radical biological radical reaction type polyurethane hot melt adhesive prepared by the reaction of isocyanate monomers and biological radical polyols and is stored in a vacuum sealing mode.
Comparative example 5
20.6g (5.890 mmol) of bio-based polyester diol Dynacoll Terra EP481.01 having a number average molecular weight of 3500, 11.8g (5.890 mmol) of bio-based polyether diol Velvetol H2000 having a number average molecular weight of 2000, 9.4g (5.890 mmol) of bio-based polyester diol Stepanpol PDP70 having a number average molecular weight of 1600, 15.0 parts of polyacrylic resin BM751 were added to a reaction flask, heated to 110℃and dehydrated in vacuo with stirring at 150r/min for 2 hours; then 4.4g (17.67 mmol) of 4,4' -diphenylmethane diisocyanate (MDI), 38.7g (17.67 mmol) of low free polyether polyol-based polyurethane prepolymer Adiprene LF900A with isocyanate functional groups at two ends and 0.1 part of dibutyltin dilaurate are added, the mixture is discharged after being reacted for 2 hours at a stirring speed of 150r/min under a vacuum condition, and the low free polyester polyol-based polyurethane prepolymer is obtained to replace a low free biological radical reaction type polyurethane hot melt adhesive prepared by the reaction of isocyanate monomers and biological polyol partially and is stored in a vacuum sealing mode.
Test case
The samples of the examples and comparative examples were subjected to comparative tests as follows:
(1) Melt viscosity: and (3) placing the polyurethane hot melt adhesive which is sealed well in a cylinder heater at 110 ℃ for 10min, at this time, pouring the hot melt adhesive into a sleeve in a Brookfield-DV2T viscometer rapidly, setting the temperature of the heater at 110 ℃ and keeping for 10min, so that the internal temperature of the hot melt adhesive is uniform and defoamed. The constant temperature melt viscosity of the hot melt adhesive was measured at 110 ℃.
(2) Open time: the hot melt adhesives obtained in examples and comparative examples were applied to polycarbonate substrates with a width of about 2mm using a dispenser, the dispensing bundles were started to time, the glue lines were lightly touched with fingers, and when the light touch glue lines were not sticky, the time was ended, and the time was recorded as the open time of the reactive polyurethane hot melt adhesive.
(3) Bonding strength for 30min and 24 h: the hot melt adhesives obtained in examples and comparative examples were dispensed at 110℃using a dispenser to coat a 25mm by 25mm rectangular frame of adhesive on a polycarbonate substrate with a width of about 1 mm. And then, attaching another polycarbonate substrate on the polycarbonate substrate, after dispensing and pressing, solidifying the sample in an environment of 25 ℃ and 50% RH for 30min and 24h, using a universal material testing machine to run the manufactured bonding sample along the drawing direction at a speed of 10mm/min until the bonding of the sample fails, recording the maximum force value displayed by the instrument, and calculating the bonding strength of the hot melt adhesive to the polycarbonate substrate by combining the bonding area.
(4) Free isocyanate content: using High Performance Liquid Chromatograph (HPLC), taking liquid as mobile phase, pumping the mobile phase into chromatographic column with stationary phase by high pressure transfusion system, separating each component in the column, and detecting by detector to obtain chromatogram of detected substance. And (3) quantitatively calculating the content of the free isocyanate monomer in the reactive polyurethane hot melt adhesive by using an external standard method, respectively recording chromatograms of a sample to be detected and a standard substance, and calculating the content of the free isocyanate in the sample to be detected according to the integral area of a specific peak on the chromatograms.
The data obtained from the above test are shown in Table 1 below
TABLE 1
As can be seen from examples 1 to 4 and comparative example 1, the bio-based reactive polyurethane hot melt adhesives of the present invention have similar melt viscosity, open time, adhesive strength as the conventional petroleum-based reactive polyurethane hot melt adhesives. The invention can replace the application of the traditional petroleum-based reactive polyurethane hot melt adhesive, and the use of bio-based renewable raw materials enhances the development sustainability. As can be seen from examples 1-4 and comparative examples 1 and 2, the petroleum-based or bio-based reactive polyurethane hot melt adhesive prepared by using the isocyanate monomer has higher free isocyanate monomer, and the content of the free isocyanate of the bio-based reactive polyurethane hot melt adhesive is below 0.1wt%, so that the content of the free isocyanate monomer is obviously reduced, the safety of using the bio-based reactive polyurethane hot melt adhesive is improved, and the health of practitioners is avoided. As can be seen from examples 1-4 and comparative examples 3 and 4, the low free reactive polyurethane hot melt adhesives prepared by using the low free polyurethane prepolymer in the comparative examples 3 and 4 in the same molar ratio instead of the isocyanate monomer have higher melt viscosity, short open time and lower bonding strength, which are unfavorable for practical application, and the optimized ratio of the addition amount between the low free prepolymer and the bio-based polyol of the invention obviously improves the comprehensive performance of the adhesive. As can be seen from examples 1-4 and comparative example 5, the present invention does not use isocyanate monomer, significantly reducing the free isocyanate content. In summary, the bio-based reactive polyurethane hot melt adhesive of the invention has low isocyanate monomer content and excellent comprehensive properties.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the invention.
Claims (10)
1. The bio-based reactive single-component polyurethane hot melt adhesive with low free isocyanate content is characterized by comprising the following components:
a bio-based polyol;
low free polyether polyol-based polyurethane prepolymers;
low free polyester polyol-based polyurethane prepolymers;
a tackifying resin;
a catalyst;
the low free polyether polyol-based polyurethane prepolymer has a free isocyanate content of less than 0.1wt%;
the low free polyester polyol based polyurethane prepolymer has a free isocyanate content of less than 0.1wt%.
2. The low free isocyanate content bio-based reactive one-component polyurethane hot melt adhesive of claim 1, wherein the molar equivalent ratio of hydroxyl groups in the bio-based polyol to isocyanate groups in the low free polyether polyol based polyurethane prepolymer is 1 (2.5-4.5).
3. The bio-based reactive single-component polyurethane hot melt adhesive with low content of free isocyanate according to claim 1, wherein the weight part of the low free polyester polyol-based polyurethane prepolymer is 10-25%, the content of the tackifying resin is 10-20% and the content of the catalyst is 0.1-1% based on the total weight part of the bio-based reactive single-component polyurethane hot melt adhesive.
4. The low free isocyanate content bio-based reactive one-component polyurethane hot melt adhesive of claim 1, wherein the bio-based polyol is a polyol that can be prepared in whole or in part from the reaction of one or more bio-based monomer feed stocks.
5. The low free isocyanate content bio-based reactive one-component polyurethane hot melt adhesive of claim 1, wherein the low free polyether polyol based polyurethane prepolymer is derived from the reaction of a polyether polyol with a polyisocyanate monomer.
6. The low free isocyanate content bio-based reactive one-component polyurethane hot melt adhesive of claim 1, wherein the low free polyester polyol based polyurethane prepolymer is derived from the reaction of a polyester polyol with a polyisocyanate monomer.
7. The low free isocyanate content bio-based reactive one-component polyurethane hot melt adhesive of claim 1, wherein the catalyst is selected from one or more of dibutyltin dilaurate, stannous octoate, triethylamine, diethylenetriamine, triethylenediamine, N-ethylmorpholine and 2, 2-dimorpholinodiethyl ether.
8. The low free isocyanate content biobased reactive one-component polyurethane hot melt adhesive of claim 1, wherein the tackifying resin is selected from one or more of thermoplastic acrylic resins, polyurethane resins, amorphous polyalphaolefin resins, rosin pentaerythritol esters, petroleum resins, terpene resins, and EVA resins.
9. A process for preparing a bio-based reactive one-component polyurethane hot melt adhesive having a low free isocyanate content as claimed in any one of claims 1 to 8, comprising the steps of:
s1: vacuum stirring and dehydrating the bio-based polyol and tackifying resin at the temperature of 100-120 ℃ at the rotating speed of 100-200r/min for 1-5h, and then cooling to 70-90 ℃ to obtain a pretreatment product;
s2: adding low free polyether polyol polyurethane prepolymer and catalyst into the pretreated product, and vacuum stirring at a rotating speed of 100-200r/min at 70-90 ℃ for reaction for 1-5h to obtain a reaction intermediate product;
s3: adding low free polyester polyol polyurethane prepolymer into the reaction intermediate product, vacuum stirring and mixing for 30min-2h at the temperature of 70-90 ℃ and the rotating speed of 100-200r/min, discharging to obtain the bio-based reaction type single-component polyurethane hot melt adhesive with low free isocyanate content, and vacuum sealing and preserving.
10. Use of the bio-based reactive one-component polyurethane hot melt adhesive with low free isocyanate content according to any one of claims 1 to 8, characterized in that it is used in the bonding and sealing of electronic consumer goods, automobiles and new energy batteries.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211717285.1A CN116004172A (en) | 2022-12-29 | 2022-12-29 | Bio-based reactive single-component polyurethane hot melt adhesive with low free isocyanate content, and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211717285.1A CN116004172A (en) | 2022-12-29 | 2022-12-29 | Bio-based reactive single-component polyurethane hot melt adhesive with low free isocyanate content, and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116004172A true CN116004172A (en) | 2023-04-25 |
Family
ID=86029371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211717285.1A Pending CN116004172A (en) | 2022-12-29 | 2022-12-29 | Bio-based reactive single-component polyurethane hot melt adhesive with low free isocyanate content, and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116004172A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106634778A (en) * | 2016-12-21 | 2017-05-10 | 浙江华峰合成树脂有限公司 | Environment-friendly polyurethane adhesive, and preparation method and applications thereof |
| CN107532058A (en) * | 2015-04-28 | 2018-01-02 | Sika技术股份公司 | The two-stage process of polyurethane-hot melt adhesive of the production with low monomeric diisocyanate content and high initial strength |
| CN111019585A (en) * | 2019-12-17 | 2020-04-17 | 烟台德邦科技有限公司 | Double-component reaction type polyurethane hot melt adhesive and preparation method thereof |
| CN114450323A (en) * | 2019-09-12 | 2022-05-06 | 朗盛公司 | Low free polyurethane prepolymer compositions |
| CN114560989A (en) * | 2022-02-14 | 2022-05-31 | 赢聚化学技术研发(南京)有限公司 | Polishing pad based on low-free polyurethane prepolymer and preparation method thereof |
-
2022
- 2022-12-29 CN CN202211717285.1A patent/CN116004172A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107532058A (en) * | 2015-04-28 | 2018-01-02 | Sika技术股份公司 | The two-stage process of polyurethane-hot melt adhesive of the production with low monomeric diisocyanate content and high initial strength |
| CN106634778A (en) * | 2016-12-21 | 2017-05-10 | 浙江华峰合成树脂有限公司 | Environment-friendly polyurethane adhesive, and preparation method and applications thereof |
| CN114450323A (en) * | 2019-09-12 | 2022-05-06 | 朗盛公司 | Low free polyurethane prepolymer compositions |
| CN111019585A (en) * | 2019-12-17 | 2020-04-17 | 烟台德邦科技有限公司 | Double-component reaction type polyurethane hot melt adhesive and preparation method thereof |
| CN114560989A (en) * | 2022-02-14 | 2022-05-31 | 赢聚化学技术研发(南京)有限公司 | Polishing pad based on low-free polyurethane prepolymer and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111234768B (en) | Polyurethane hot melt adhesive for bonding non-polar materials and preparation method thereof | |
| EP3233951B1 (en) | Urethane adhesive | |
| KR101096986B1 (en) | Process for producing urethane resin and pressure-sensitive adhesive | |
| CN106459360B (en) | Thermoplastic polyurethane hotmelt | |
| US11091677B2 (en) | Reactive polyurethane hot melt adhesives containing fillers | |
| SK9462002A3 (en) | Adhesion promoters for monomer-free reactive polyurethanes | |
| CN101463242A (en) | Double-component environment protection type polyurethane adhesive for PVC thin film dry type composition and preparation method thereof | |
| CN103180356A (en) | Polyurethanene hot-melt adhesive with reduced viscosity | |
| US20120172524A1 (en) | Reactive hot-melt adhesive agent composition | |
| MXPA05013468A (en) | Reactive polyurethane prepolymers with a low amount of monomeric diisocyanates. | |
| CN108779379A (en) | urethane adhesive | |
| JP7154904B2 (en) | moisture curing adhesive | |
| JP7425977B2 (en) | Moisture-curing hot melt adhesive composition, adhesive, and clothing | |
| CN116004172A (en) | Bio-based reactive single-component polyurethane hot melt adhesive with low free isocyanate content, and preparation method and application thereof | |
| EP4103656A1 (en) | Reactive hot melt adhesive composition and use thereof | |
| CN113403018B (en) | Polyurethane hot melt adhesive and preparation method and application thereof | |
| CN111978909B (en) | Reactive polyurethane hot melt adhesive for low-temperature coating and preparation method thereof | |
| WO2023133744A1 (en) | High bio-content polyurethane hot melt adhesive composition | |
| JPH08170068A (en) | Moisture-curing urethane sealant composition | |
| CN116103007A (en) | Polyurethane hot melt adhesive with low melt viscosity, long opening time, high adhesive strength and good impact resistance and preparation method thereof | |
| CN110885660A (en) | Polyurethane hot melt adhesive for low surface energy material and preparation method thereof | |
| CN115895568A (en) | Reactive single-component polyurethane hot melt adhesive and preparation method and application thereof | |
| CN116004176A (en) | UV moisture curing reaction type polyurethane hot melt adhesive and preparation method thereof | |
| CN115806793A (en) | Low-free-reaction type polyurethane hot melt adhesive and preparation method thereof | |
| WO2023182285A1 (en) | Non-sewn clothing manufacturing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |