CN112011307A - Reactive polyurethane hot melt adhesive for furniture coating and preparation method thereof - Google Patents
Reactive polyurethane hot melt adhesive for furniture coating and preparation method thereof Download PDFInfo
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- CN112011307A CN112011307A CN202010935744.8A CN202010935744A CN112011307A CN 112011307 A CN112011307 A CN 112011307A CN 202010935744 A CN202010935744 A CN 202010935744A CN 112011307 A CN112011307 A CN 112011307A
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- Prior art keywords
- hot melt
- melt adhesive
- furniture
- reactive polyurethane
- polyurethane hot
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- 239000004831 Hot glue Substances 0.000 title claims abstract description 54
- 239000004814 polyurethane Substances 0.000 title claims abstract description 27
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 24
- 239000006221 furniture coating Substances 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 34
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 34
- 238000005253 cladding Methods 0.000 claims abstract description 23
- 229920005906 polyester polyol Polymers 0.000 claims abstract description 17
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 13
- 239000012948 isocyanate Substances 0.000 claims abstract description 12
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 12
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 11
- 239000003054 catalyst Substances 0.000 claims abstract description 11
- 229920000570 polyether Polymers 0.000 claims abstract description 11
- 229920005862 polyol Polymers 0.000 claims abstract description 11
- 150000003077 polyols Chemical class 0.000 claims abstract description 11
- -1 carbonate modified methacrylate Chemical class 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 16
- 150000002009 diols Chemical class 0.000 claims description 14
- 229920000728 polyester Polymers 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 7
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 6
- 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 6
- 238000001816 cooling Methods 0.000 claims description 6
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 6
- 229920001451 polypropylene glycol Polymers 0.000 claims description 6
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Natural products CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- 229920003232 aliphatic polyester Polymers 0.000 claims description 4
- 125000003118 aryl group Chemical group 0.000 claims description 4
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 claims description 4
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 claims description 4
- 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 claims description 2
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 2
- ISKQADXMHQSTHK-UHFFFAOYSA-N [4-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=C(CN)C=C1 ISKQADXMHQSTHK-UHFFFAOYSA-N 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 2
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 2
- 229920005586 poly(adipic acid) Polymers 0.000 claims description 2
- 229920000909 polytetrahydrofuran Polymers 0.000 claims description 2
- 229940098465 tincture Drugs 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract description 11
- 238000000576 coating method Methods 0.000 abstract description 11
- 239000000463 material Substances 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract 2
- 230000001070 adhesive effect Effects 0.000 abstract 2
- 239000003960 organic solvent Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 9
- 239000002253 acid Substances 0.000 description 5
- 238000004898 kneading Methods 0.000 description 5
- 230000018044 dehydration Effects 0.000 description 4
- 238000006297 dehydration reaction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 150000002734 metacrylic acid derivatives Chemical class 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 2
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical group CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000010526 radical polymerization reaction Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 229920002160 Celluloid Polymers 0.000 description 1
- 239000004823 Reactive adhesive Substances 0.000 description 1
- 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 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 238000006757 chemical reactions by type Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 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 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
- C09J175/14—Polyurethanes having carbon-to-carbon unsaturated 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
- C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
- C08G18/4018—Mixtures of compounds of group C08G18/42 with compounds of group C08G18/48
-
- 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
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4236—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups
- C08G18/4238—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups derived from dicarboxylic acids and dialcohols
-
- 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
-
- 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
- C08G18/67—Unsaturated compounds having active hydrogen
- C08G18/671—Unsaturated compounds having only one group containing active hydrogen
- C08G18/672—Esters of acrylic or alkyl acrylic acid having only one group containing active hydrogen
-
- 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
- C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
-
- 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
- C08G2170/00—Compositions for adhesives
- C08G2170/20—Compositions for hot melt adhesives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2312/00—Crosslinking
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a reactive polyurethane hot melt adhesive for furniture cladding and a preparation method thereof, wherein the hot melt adhesive is prepared from the following raw materials: polyether polyol, polyester polyol, isocyanate, carbonate modified methacrylate HEMMAC with hydroxyl, ethylene-vinyl acetate copolymer EVM and a catalyst. The reactive polyurethane hot melt adhesive prepared by the invention meets the requirements of high adhesive force and high initial adhesive force required by furniture coating lines, has good bonding property to low surface energy materials such as pvc and PE, has good heat resistance, has particularly excellent resistance to water or moisture, and can be applied to the field of needing to bond the low surface energy materials well and possibly being in a hot, water or moisture environment for a long time. The coating agent can replace the original EVA hot melt adhesive coating product and the oily coating product containing organic solvent in the field of furniture coating.
Description
Technical Field
The invention belongs to the field of reactive hot melt adhesives for furniture coating, and particularly relates to a reactive polyurethane hot melt adhesive for furniture coating and a preparation method thereof
Background
The reactive polyurethane hot melt adhesive (PUR) is a reactive adhesive which has excellent initial adhesion strength, quick fixation, cross-linking and curing, and also has the characteristics of heat resistance, durability, high final adhesion strength and the like, and is developed rapidly. Has extremely high application value in the industries of woodworking, machinery, automobiles, electronics and the like. How to improve the bonding of the low-surface-energy plastic is a great problem faced by the woodworking PUR, and in the furniture coating process, the production efficiency of an integrated production line is high, and the curing time of the PUR is too short, so that the initial adhesion of a product needing to be applied in the direction is high; the product coated can bear unqualified problems of bubbling, falling, edge rising and the like of a coated finished product in high temperature of a shipping container.
Disclosure of Invention
The invention aims to provide a reactive polyurethane hot melt adhesive for furniture cladding and a preparation method thereof, aiming at the defects of the prior art. The reactive hot melt adhesive for covering furniture has the characteristics of low surface energy plastic film, high temperature resistance, high initial adhesion and the like.
The purpose of the invention is realized by the following technical scheme: the reactive polyurethane hot melt adhesive for coating furniture is prepared from the following raw materials in parts by weight: 30-60 parts of polyether polyol, 20-40 parts of polyester polyol, 10-20 parts of isocyanate, 5-10 parts of carbonate modified methacrylate (HEMMAC) with hydroxyl, 5-10 parts of ethylene-vinyl acetate copolymer (EVM), and 0.05-0.5 part of catalyst.
Further, the polyether polyol has the number average molecular weight of 2000-4000 and is composed of one or two of polypropylene glycol and polytetramethylene ether glycol according to any proportion.
Further, the polyester polyol has a number average molecular weight of 2000-3000, and is composed of one or more of aliphatic polyester diol and aromatic polyester polyol according to any proportion.
Further, the aliphatic polyester diol is a poly adipic acid polyester diol or a poly carbonic acid polyester diol; the aromatic polyester polyol is phthalic acid polyester diol or benzene tincture polyester polyol.
Furthermore, the isocyanate is composed of one or more of diphenylmethane diisocyanate, hexamethylene diisocyanate and toluene diisocyanate according to any proportion.
Further, the ethylene-vinyl acetate copolymer EVM is composed of one or two of Levamelt 456 and Levaprene 700 according to any proportion.
Furthermore, the catalyst is composed of one or more of dibutyltin dilaurate, dibutyltin diacetate, triethylenediamine and bis-morpholinyl diethyl ether according to any proportion.
A preparation method of the reactive polyurethane hot melt adhesive for furniture cladding comprises the following steps:
step one, putting polyether polyol, polyester polyol, ethylene-vinyl acetate copolymer EVM and carbonate modified methacrylate HEMMAC with hydroxyl into a reaction kettle according to parts by weight, heating to the temperature of 110-;
step two, cooling to 80-10 ℃, adding isocyanate under the protection of nitrogen, stirring and reacting at 85-140 ℃ for 30-90 minutes under the protection of nitrogen;
and step three, adding a catalyst, vacuumizing and stirring for 30-60 minutes at 85-140 ℃, and discharging to obtain the reactive polyurethane hot melt adhesive for furniture coating.
The invention has the beneficial effects that: the reactive hot melt adhesive for furniture cladding has a good infiltration bonding effect on a PVC film with low surface energy, and is good in high temperature resistance and high in initial adhesion. The HEMAC is a special carbonate-modified methacrylate. The structure is introduced with an acrylic double bond with free radical polymerization capability and a high-reactivity primary hydroxyl group to prepare a high-reactivity monomer. The HEMAC has a carbonate bond, so that the hydrolysis resistance and the heat resistance are excellent, and the introduction of the monomer can provide higher initial solid strength at the early stage of the reaction and curing of the product; the EVM is introduced into the system, is an amorphous copolymer with high branching degree, is in a rubber-like state, and can be used for providing a product with a preliminary cross-linking structure in the early stage of coating, so that the requirement of high initial adhesion is met, and the high-speed production of an application end is further met.
Detailed Description
The present invention will be further described with reference to the following examples.
In the present invention, the hydroxyl group-containing carbonate-modified methacrylate HEMAC had a molecular weight of 260, an acid value of 0.12KOHmg/g, and a manufacturer of xylonite DAICEL; the carbonate modified methacrylate HEMMAC with hydroxyl is special carbonate modified methacrylate, and a high-reaction type monomer prepared by an acrylic double bond with free radical polymerization capacity and a primary hydroxyl with high reaction activity is introduced into the structure; the carbonate-modified methacrylate HEMAC with hydroxyl has a carbonate bond, so that the hydrolysis resistance and the heat resistance are excellent, and the application range is wide.
The ethylene-vinyl acetate copolymer EVM is as follows: the amorphous copolymer has high vinyl acetate content (mass fraction of 0.4-0.8) and high branching degree, and preferably, the EVM manufacturer is Arrannovaceae (ARLANXEO), and the mark is one or two of Levamelt 456 and Levaprene 700. The product structure is as follows:
example 1
A reactive hot melt adhesive for furniture cladding comprises the following components in parts by weight:
| raw material | Mass portion of |
| Polypropylene glycol Mn 2000 | 40 |
| Mn 3000 of polycaproic acid polyester diol | 37 |
| Toluene diisocyanate | 20 |
| HEMAC | 5.75 |
| EVM(Levamelt 456) | 5 |
| Dibutyl tin dilaurate | 0.25 |
A preparation method of a reactive hot melt adhesive for furniture cladding comprises the following steps:
step one, putting polyether polyol, polyester polyol, EVM and HEMAC into a reaction kettle according to a metering ratio, heating to 120 ℃, and carrying out vacuum dehydration for 70 minutes under stirring;
step two, cooling to 100 ℃ in nitrogen (N)2) Adding isocyanate under protection, and adding N at 100 DEG C2Stirring and reacting for 60 minutes under protection;
and step three, adding a catalyst, vacuumizing and stirring for 60 minutes at 105 ℃, and discharging to obtain the reactive polyurethane hot melt adhesive for furniture coating.
The properties of the finished reactive hot melt adhesive for furniture cladding prepared in example 1 are shown in Table 1.
Example 2
A reactive hot melt adhesive for furniture cladding comprises the following components in parts by weight:
| raw material | Mass portion of |
| Polypropylene glycol Mn 2000 | 30 |
| Mn 3000 of polycaproic acid polyester diol | 40 |
| Toluene diisocyanate | 10 |
| HEMAC | 10 |
| EVM(Levamelt 456) | 7 |
| Dibutyl tin dilaurate | 0.5 |
A preparation method of a reactive hot melt adhesive for furniture cladding comprises the following steps:
step one, putting polyether polyol, polyester polyol, EVM and HEMAC into a reaction kettle according to a metering ratio, heating to 120 ℃, and carrying out vacuum dehydration for 70 minutes under stirring;
step two, cooling to 100 ℃ in nitrogen (N)2) Adding isocyanate under protection, and adding N at 100 DEG C2Stirring and reacting for 60 minutes under protection;
and step three, adding a catalyst, vacuumizing and stirring for 60 minutes at 105 ℃, and discharging to obtain the reactive polyurethane hot melt adhesive for furniture coating.
The properties of the finished reactive hot melt adhesive for furniture cladding prepared in example 2 are shown in table 1.
Example 3
A reactive hot melt adhesive for furniture cladding comprises the following components in parts by weight:
| raw material | Mass portion of |
| Polypropylene glycol Mn 2000 | 60 |
| Mn 3000 of polycaproic acid polyester diol | 20 |
| Toluene diisocyanate | 10 |
| HEMAC | 5 |
| EVM(Levamelt 456) | 10 |
| Dibutyl tin dilaurate | 0.05 |
A preparation method of a reactive hot melt adhesive for furniture cladding comprises the following steps:
step one, putting polyether polyol, polyester polyol, EVM and HEMAC into a reaction kettle according to a metering ratio, heating to 120 ℃, and carrying out vacuum dehydration for 70 minutes under stirring;
step two, cooling to 100 ℃ in nitrogen (N)2) Adding isocyanate under protection, and adding N at 100 DEG C2Stirring and reacting for 60 minutes under protection;
and step three, adding a catalyst, vacuumizing and stirring for 60 minutes at 105 ℃, and discharging to obtain the reactive polyurethane hot melt adhesive for furniture coating.
The properties of the finished reactive hot melt adhesive for furniture wrapping prepared in example 3 are shown in Table 1.
Comparative example 1
A hot melt adhesive for coating EVA furniture comprises the following components in parts by weight:
the antioxidant is pentaerythritol tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ]
A preparation method of a hot melt adhesive for coating common EVA furniture comprises the following steps:
(1) feeding EVA and pentaerythritol tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] into a kneader, starting heating and kneading uniformly, controlling the kneading speed at 25Hz, controlling the temperature of materials in a reaction kettle at 170 ℃, and heating until the materials are completely melted;
(2) adding petroleum resin and rosin resin in a specified proportion into the molten material in the step 1, uniformly kneading the mixture, wherein the kneading frequency is 35Hz, kneading the mixture until the material is completely molten, and reducing the temperature of the material to 140 ℃;
(3) discharging the hot melt adhesive rough material for edge sealing of the high-temperature-resistant thermoplastic furniture obtained in the step 3 by using a 200-mesh 400-mesh plane filter, granulating, dehydrating, drying and packaging to obtain the hot melt adhesive for furniture cladding.
The properties of the finished EVA hot melt adhesive for furniture coating prepared in comparative example 1 are shown in Table 1.
Comparative example 2
A reactive hot melt adhesive for furniture cladding comprises the following components in parts by weight:
| raw material | Mass portion of |
| Polypropylene glycol Mn 2000 | 30 |
| Mn 3000 of polycaproic acid polyester diol | 40 |
| Toluene diisocyanate | 10 |
| Acrylic resin | 17 |
| Dibutyl tin dilaurate | 0.5 |
A preparation method of a reactive hot melt adhesive for furniture cladding comprises the following steps:
step one, putting polyether polyol, polyester polyol and acrylic resin into a reaction kettle according to a metering ratio, heating to 120 ℃, and carrying out vacuum dehydration for 70 minutes under stirring;
step two, cooling to 100 ℃ in nitrogen (N)2) Adding isocyanate under protection, and adding N at 100 DEG C2Stirring and reacting for 60 minutes under protection;
and step three, adding a catalyst, vacuumizing and stirring for 60 minutes at 105 ℃, and discharging to obtain the reactive polyurethane hot melt adhesive for furniture coating.
The properties of the finished reactive hot melt adhesive for furniture cladding prepared in comparative example 2 are shown in table 1.
Table 1: performance test results of furniture coating glues of examples 1 to 3 and comparative examples 1 to 2
From the above results, it can be seen that the reactive polyurethane hot melt adhesives of examples 1-3 and comparative example 2 are far superior to EVA hot melt adhesives in terms of strength, initial adhesion and selectivity to the substrate. The EVA hot melt adhesive is a thermoplastic hot melt adhesive, the structure of the EVA hot melt adhesive can relatively displace along with the rise of temperature, so that unqualified products are produced in the tests of UV rays and high temperature resistance of 90 ℃, the reactive hot melt adhesive is a thermosetting type, and the isocyanate reacts with air and trace water in a plate at the later stage, so that the inside of a colloid is crosslinked, and the structure of the reactive hot melt adhesive can not relatively displace at the same high temperature, so the heat resistance and the coating strength of the reactive hot melt adhesive are far higher than those of the EVA hot melt adhesive of the comparative example 1; as can be seen from the results of the coating strength test, examples 1 to 3, to which the carbonate-modified methacrylate ester having a hydroxyl group (HEMAC) was added, had higher coating strength than comparative example 2, to which no hydroxyl group was added; from the initial adhesion test result, the material added with the EVM can be obtained, and the initial adhesion is obviously better than that of the material of the comparative example 2; therefore, the proper addition of the carbonate modified methacrylate (HEMAC) with hydroxyl and the EVM can improve the coating strength of the product on the base material and the initial adhesion of the product without reducing the application performance of the product.
Claims (8)
1. The reactive polyurethane hot melt adhesive for furniture coating is characterized by comprising the following raw materials in parts by weight: 30-60 parts of polyether polyol, 20-40 parts of polyester polyol, 10-20 parts of isocyanate, 5-10 parts of carbonate modified methacrylate (HEMMAC) with hydroxyl, 5-10 parts of ethylene-vinyl acetate copolymer (EVM), 0.05-0.5 part of catalyst and the like.
2. The reactive polyurethane hot melt adhesive for furniture cladding as claimed in claim 1, wherein the polyether polyol has a number average molecular weight of 2000-4000 and is composed of one or two of polypropylene glycol and polytetramethylene ether glycol in any proportion.
3. The reactive polyurethane hot melt adhesive for furniture cladding as claimed in claim 1, wherein the polyester polyol has a number average molecular weight of 2000-3000, and is composed of one or more of aliphatic polyester diol and aromatic polyester polyol in any proportion.
4. The reactive polyurethane hot melt adhesive for furniture cladding as claimed in claim 3, wherein the aliphatic polyester diol is a poly adipic acid polyester diol or a poly carbonic acid polyester diol; the aromatic polyester polyol is phthalic acid polyester diol or benzene tincture polyester polyol.
5. The reactive polyurethane hot melt adhesive for furniture cladding as claimed in claim 1, wherein the isocyanate is one or more of diphenylmethane diisocyanate, hexamethylene diisocyanate and toluene diisocyanate in any proportion.
6. The reactive polyurethane hot melt adhesive for furniture cladding as claimed in claim 1, wherein the ethylene-vinyl acetate copolymer EVM is composed of one or two of Levamelt 456 and Levaprene 700 in any proportion.
7. The reactive polyurethane hot melt adhesive for furniture cladding as claimed in claim 1, wherein the catalyst is composed of one or more of dibutyltin dilaurate, dibutyltin diacetate, triethylenediamine and bis-morpholinyl diethyl ether according to any proportion.
8. A preparation method of the reactive polyurethane hot melt adhesive for furniture cladding as claimed in any one of claims 1 to 7, which is characterized by comprising the following steps:
step one, putting polyether polyol, polyester polyol, ethylene-vinyl acetate copolymer EVM and carbonate modified methacrylate HEMMAC with hydroxyl into a reaction kettle according to parts by weight, heating to the temperature of 110-;
step two, cooling to 80-10 ℃, adding isocyanate under the protection of nitrogen, stirring and reacting at 85-140 ℃ for 30-90 minutes under the protection of nitrogen;
and step three, adding a catalyst, vacuumizing and stirring for 30-60 minutes at 85-140 ℃, and discharging to obtain the reactive polyurethane hot melt adhesive for furniture coating.
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| CN114752339A (en) * | 2022-04-22 | 2022-07-15 | 上海汉司实业有限公司 | Reactive polyurethane hot melt adhesive and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104610902A (en) * | 2015-02-12 | 2015-05-13 | 厦门誉匠复合材料有限公司 | Rapidly post-cured polyurethane hot melt adhesive and preparation method thereof |
| CN108997965A (en) * | 2018-09-10 | 2018-12-14 | 成都硅宝科技股份有限公司 | A kind of reactive polyurethane hot melt and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104610902A (en) * | 2015-02-12 | 2015-05-13 | 厦门誉匠复合材料有限公司 | Rapidly post-cured polyurethane hot melt adhesive and preparation method thereof |
| CN108997965A (en) * | 2018-09-10 | 2018-12-14 | 成都硅宝科技股份有限公司 | A kind of reactive polyurethane hot melt and preparation method thereof |
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| CN114752339A (en) * | 2022-04-22 | 2022-07-15 | 上海汉司实业有限公司 | Reactive polyurethane hot melt adhesive and preparation method thereof |
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