CN102504750B - Polyurethane sealant with good initial adhesion - Google Patents
Polyurethane sealant with good initial adhesion Download PDFInfo
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- CN102504750B CN102504750B CN2011103736827A CN201110373682A CN102504750B CN 102504750 B CN102504750 B CN 102504750B CN 2011103736827 A CN2011103736827 A CN 2011103736827A CN 201110373682 A CN201110373682 A CN 201110373682A CN 102504750 B CN102504750 B CN 102504750B
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Abstract
The invention discloses a polyurethane sealant with good initial adhesion. The polyurethane sealant comprises the following ingredients in percentage by mass: 15 to 45 percent of polyurethane prepolymer, 10 to 40 percent of plasticizers, 0.5 to 15 percent of initial adhesion promoters, 1 to 10 percent of thixotropic agents, 5 to 30 percent of filling materials, 0.1 to 0.5 percent of light stabilizers, 0.1 to 0.5 percent of antioxidants, 0.5 to 3 percent of silane type bonding promoters and 0.1 to 1.5 percent of moisture removing agents, wherein the polyurethane prepolymer is obtained through preparation. Compared with the prior art, the polyurethane sealant has the following characteristics that: (1) the polyurethane sealant has good initial adhesion on the surfaces of imporous substrates such as glass, ceramics and the like, and the problems that the adhesion force in the initial curing period is poor and the adhesion damage is easy to occur when the polyurethane sealant receives external force effect are solved; and (2) no bubble exists in the sealant layer during the humid air curing, and the adhesion performance is good.
Description
Technical field
The invention belongs to the material technology field, particularly relate to a kind of polyurethane sealant with good tack.
Background technology
Polyurethane sealant has that the coating of solvent-free or low solvent, facade is not trickled, oil resistant, do not go mouldy, the performances such as resistance to chemical attack and excellent noise resistance, anti-vibrating and impact, it has surface and can apply multiple paint and coating simultaneously, easily the advantage such as repairing.Therefore, the application in the industries such as automobile production, maintenance, Production Container, boats and ships, building and instrument is increasingly extensive.
The material of main part of polyurethane sealant is the performed polymer with the isocyanate groups end-blocking, can be at ambient temperature and airborne reaction of moisture, form high-intensity elastomerics.In use, easily the performed polymer with isocyanate groups in phenomenon, the especially polyurethane sealants such as stickness and moisture in air react and discharge CO polyurethane sealant easy variable color, surface
2, make between the seal gum that solidifies and bonding interface to form a gas weak interface layer, directly affect the adhesiveproperties of polyurethane sealant, while on the non-porous materials such as glass, pottery, metal, using, this kind phenomenon is more so.
If need on above-mentioned non-porous material, carry out when bonding, need carry out surface preparation or bottoming and be coated with.The researchist is also arranged by in polyurethane sealant, adding silane coupling agent to reach bonding on the nonporous substrate surface, but, silane coupling agent is small molecules, need could arrive bonding substrate surface through molecular migration, by wetting to it, sprawl, absorption or chemical bonding, just can reach bonding purpose, this time that needs is longer, short several days, long one month, even exist sometimes polyurethane sealant fully curing, while being subjected to External Force Acting, bond failure can occur, and glue noresidue on bonding interface.
Therefore, for the existing the problems referred to above of polyurethane sealant of the prior art, provide on a kind of basis of the performance meeting existing polyurethane sealant, have simultaneously the technology of the polyurethane sealant of good tack, seem particularly important.
Summary of the invention
The object of the invention is to avoid existing deficiency in prior art and a kind of polyurethane sealant with good tack is provided, this has the polyurethane sealant of good tack, can effectively solve polyurethane sealant and have the problem that nonporous substrate surface bonding speed is slow, bonding strength is poor.
Purpose of the present invention is achieved through the following technical solutions:
A kind of polyurethane sealant with good tack is provided, has it is characterized in that, comprised the raw material that following mass percent forms:
Base polyurethane prepolymer for use as 15～45%;
Softening agent 10～40%;
Initial bonding strength promotor 0.5～15%;
Thixotropic agent 1～10%;
Filler 5～30%;
Photostabilizer 0.1～0.5%;
Oxidation inhibitor 0.1～0.5%;
Silicane adhesion promoters 0.5～3%;
Moisture content scavenging agent 0.1～1.5%;
wherein, described base polyurethane prepolymer for use as gets by preparation, its preparation method is: by mass ratio, be that the polyether glycol of two functionality of 1:0.1～1.5 and the polyether glycol of three-functionality-degree join in reactor, stirring the also temperature of conditioned reaction still is 90～150 ℃, in vacuum tightness, be not less than under the condition of 0.092Mpa, 2～5h dewaters, be cooled to 60～80 ℃, after temperature-stable, to adding NCO/OH in reactor, be 1.2～2.5 isocyanate curing agent and 0.001～0.005% the organic tin catalyzer that accounts for the said mixture total mass again, after reaction 2～5h, obtain base polyurethane prepolymer for use as.
separately, described base polyurethane prepolymer for use as gets by preparation, its preparation method can be: selecting molecular weight is that 2000～10000 difunctionality Polyoxypropylene diol and molecular weight are 3000～8000 three-functionality-degree polyoxytrimethylene trivalent alcohol, according to 1:0.1～1.5 mass ratios, with tolylene diisocyanate, ditan-4, 4 '-vulcabond, thick diphenylmethanediisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, any reaction in dicyclohexyl methane diisocyanate, add 0.001～0.005% dibutyl tin laurate that accounts for the said mixture total mass, stannous octoate, any in modification organic tin catalyzer is as catalyzer, after reaction 2～5h, obtain base polyurethane prepolymer for use as.
separately, this preparation method with polyurethane sealant of good tack comprises: by the base polyurethane prepolymer for use as of above-mentioned preparation and the dried initial bonding strength promotor of process vaccum dewatering, filler, thixotropic agent, softening agent, photostabilizer, oxidation inhibitor is not less than 0.092Mpa in vacuum tightness, temperature is after in the stirrer of the double-planet with the high speed dispersion dish of 30～50 ℃ or three-roll grinder, carrying out dispersed with stirring 2～5h, under normal pressure high pure nitrogen protection, add amine surface drying catalyzer, silicane adhesion promoter and moisture content scavenging agent, dispersed with stirring 1～3h, in vacuum tightness, be not less than 0.092 time, deviate from small molecules and be uniformly mixed 0.3～1h, obtain the polyurethane sealant with good tack required for the present invention.
A kind of polyurethane sealant with good tack comprises the raw material that following mass percent forms:
Base polyurethane prepolymer for use as 15～30%;
Softening agent 10～40%;
Initial bonding strength promotor 1～7.5%;
Thixotropic agent 1～10%;
Filler 5～30%;
Photostabilizer 0.1～0.5%;
Oxidation inhibitor 0.1～0.5%;
Silicane adhesion promoters 0.5～3%;
Moisture content scavenging agent 0.1～1.5%.
A kind of polyurethane sealant with good tack comprises the raw material that following mass percent forms:
Base polyurethane prepolymer for use as 30～45%;
Softening agent 10～40%;
Initial bonding strength promotor 7.5～15%;
Thixotropic agent 1～10%;
Filler 5～30%;
Photostabilizer 0.1～0.5%;
Oxidation inhibitor 0.1～0.5%;
Silicane adhesion promoters 0.5～3%;
Moisture content scavenging agent 0.1～1.5%.
Wherein, described initial bonding strength promotor is Gum Rosin, terpine resin, coumarone indene resin, molecular weight are not less than 2000, cyano content is 5～20% terminal hydroxy group, end carboxyl or isocyanate terminated basic paracril, calcium oxide, calcium hydroxide, paste PVC powder, particle diameter are the nano carbon blacks of 50～300nm, and molecular weight is any in the liquid polybutadiene of 600～8000 end sulfydryl liquid polysulfide rubber and terminal hydroxy group, isocyanate terminated or end carboxyl.
Wherein, described softening agent is any in o-phthalic acid dibutyl ester, Dinonylphthalate, diisononyl phthalate, Di Iso Decyl Phthalate, hexanodioic acid dibutyl ester, didecyl adipate, phenyl alkylsulf and terephthalic acid dibutyl ester.
Wherein, described thixotropic agent be nano fumed silica, nm-class active calcium carbonate, organic modification montmonrillonite, wilkinite, hydrogenated castor oil, diatomite, polyamide-based thixotropic agent, with the siloxanes thixotropic agent of polyoxygenated alkene side chain and in nanometer carbon black any or several.
Wherein, described filler be particle diameter be 800～10000 purpose coarse whitings, particle diameter be 800～5000 kaolin, particle diameter be in 2000～8000 active fine particle calcium carbonate, hollow glass microballoon, talcum powder and carbon black any or several.
Wherein, described photostabilizer is the UV light stabilizing agent of ultraviolet absorbers and the hindered amines of benzotriazole category; The ultraviolet absorbers of described benzotriazole category is Tinuvin213 or UV-320; The UV light stabilizing agent of described hindered amines is (2,2,6,6-tetramethyl piperidine) sebate or 4-benzoyloxy-2,2,6, the 6-tetramethyl piperidine.
Wherein, described oxidation inhibitor is any in Irgastab PUR68, antioxidant 1010, Irganox 5057 and B225.
Wherein, described silicane adhesion promoters be in γ mercaptopropyitrimethoxy silane, γ-sulfydryl propyl-triethoxysilicane, β-(3,4-epoxy group(ing) hexyl) ethyl trimethoxy silane, γ-aminopropyl triethoxysilane, N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane, γ-methacryloxypropyl trimethoxy silane, γ-aminopropyltrimethoxysilane and γ-Racemic glycidol oxygen propyl trimethoxy silicane any or several; Described moisture content scavenging agent is any in silane coupling agent, triethyl orthoformate and the oxazole alkanes moisture content scavenging agent of the reaction that easily is hydrolyzed.
Beneficial effect of the present invention:
a kind of polyurethane sealant with good tack, comprise the raw material that following mass percent forms: base polyurethane prepolymer for use as 15～45%, softening agent 10～40%, initial bonding strength promotor 0.5～15%, thixotropic agent 1～10%, filler 5～30%, photostabilizer 0.1～0.5%, oxidation inhibitor 0.1～0.5%, silicane adhesion promoters 0.5～3%, moisture content scavenging agent 0.1～1.5%, wherein, described base polyurethane prepolymer for use as gets by preparation, its preparation method is: by mass ratio, be that the polyether glycol of two functionality of 1:0.1～1.5 and the polyether glycol of three-functionality-degree join in reactor, stirring the also temperature of conditioned reaction still is 90～150 ℃, in vacuum tightness, be not less than under the condition of 0.092Mpa, 2～5h dewaters, be cooled to 60～80 ℃, after temperature-stable, to adding NCO/OH in reactor, be 1.2～2.5 isocyanate curing agent and 0.001～0.005% the organic tin catalyzer that accounts for the said mixture total mass again, after reaction 2～5h, obtain base polyurethane prepolymer for use as.
Because a kind of polyurethane sealant with good tack of the present invention adopts initial bonding strength promotor, and according to base polyurethane prepolymer for use as 15～45%; Softening agent 10～40%; Initial bonding strength promotor 0.5～15%; Thixotropic agent 1～10%; Filler 5～30%; Photostabilizer 0.1～0.5%; Oxidation inhibitor 0.1～0.5%; Silicane adhesion promoters 0.5～3%; The formed polyurethane sealant with good tack of the composition of moisture content scavenging agent 0.1～1.5% and proportioning, compared with prior art, have following characteristics: (1) has good tack on the nonporous substrate surfaces such as glass, pottery, solve curing initial stage bonding force poor, the problem of bond failure easily occurs while being subjected to External Force Acting; (2) during moisture-curable in glue-line without bubble, adhesiveproperties is good.
Embodiment
The invention will be further described with the following Examples.
Comparative Examples
A kind of polyurethane sealant comprises the raw material that following mass percent forms:
Base polyurethane prepolymer for use as: 45%; O-phthalic acid dibutyl ester: 25%; Nano fumed silica: 5%; 2000 order coarse whitings: 23.65%; UV-213:0.02%; Irgastab PUR68:0.03%; γ mercaptopropyitrimethoxy silane: 1%; Tricarboxylic acid trimethyl: 0.3%.
Embodiment 1
A kind of polyurethane sealant with good tack comprises the raw material that following mass percent forms:
Base polyurethane prepolymer for use as: 45%; O-phthalic acid dibutyl ester: 25%; Molecular weight is 2000 end sulfydryl thiorubber: 1.5%; Nano fumed silica: 5%; 2000 order coarse whitings: 22.15%; UV-213:0.02%; Irgastab PUR68:0.03%; γ mercaptopropyitrimethoxy silane: 1%; Tricarboxylic acid trimethyl: 0.3%.
(1) above-mentioned base polyurethane prepolymer for use as gets by preparation, its preparation method is: add molecular weight and be the polyether glycol 800g of 2000 liang of functionality and polyether glycol 200g that molecular weight is 5000 three-functionality-degrees in reactor, stirring the also temperature of conditioned reaction still is 100 ℃, after mixing, in vacuum tightness, be under the condition of 0.096Mpa, 3.0h dewaters, be cooled to 65 ℃, after homo(io)thermism, add 232.5g ditan-4, 4 '-vulcabond, and add 0.001% the dibutyl tin laurate that accounts for the said mixture total mass, reaction 2.0h, obtain base polyurethane prepolymer for use as.
(2) has the preparation method of the polyurethane sealant of good tack: by prepared base polyurethane prepolymer for use as 450g and the dried dioctyl phthalate (DOP) 250g of process vaccum dewatering, molecular weight is 2000 end sulfydryl thiorubber 15g, nano fumed silica 50g, 2000 order coarse whiting 221.5g, UV-213 0.2g, Irgastab PUR68 0.3g, in vacuum tightness, be under the condition of 0.095Mpa, temperature is after the stirrer of the double-planet with the high speed dispersion dish of 35 ℃ carries out dispersed with stirring 2h, under normal pressure high pure nitrogen protection, add 0.002% the amine surface drying catalyzer that accounts for the said mixture total mass, γ-sulfydryl propyl-triethoxysilicane 10g and tricarboxylic acid trimethyl 3g, dispersed with stirring 0.5h, in vacuum tightness, be under 0.095Mpa, deviate from small molecules and be uniformly mixed 0.5h, the polyurethane sealant that must have good tack.
Embodiment 2
A kind of polyurethane sealant with good tack comprises the raw material that following mass percent forms:
Base polyurethane prepolymer for use as: 30%; Hexanodioic acid dibutyl ester: 30%; Terpine resin: 1.5%; Polyamide-based thixotropic agent: 1%; 1200 order kaolin: 35.45%; UV-213:0.03%; Irgastab PUR68:0.02%; γ-Racemic glycidol oxygen propyl trimethoxy silicane: 1.5%; Oxazole alkanes moisture content scavenging agent: 0.5%.
(1) above-mentioned base polyurethane prepolymer for use as gets by preparation, its preparation method is: add molecular weight and be the polyether glycol 500g of 2000 liang of functionality and polyether glycol 500g that molecular weight is 5000 three-functionality-degrees in reactor, stirring the also temperature of conditioned reaction still is 120 ℃, after mixing, in vacuum tightness, be under the condition of 0.096Mpa, 2.0h dewaters, be cooled to 60 ℃, after homo(io)thermism, add the 146.2g tolylene diisocyanate, and adding 0.003% the stannous octoate that accounts for the said mixture total mass, reaction 2.5h, obtain base polyurethane prepolymer for use as.
(2) has the preparation method of the polyurethane sealant of good tack: by prepared base polyurethane prepolymer for use as 300g and the dried Octyl adipate 300g of process vaccum dewatering, terpine resin 15g, polyamide-based thixotropic agent 10g, 1200 order kaolin 354.5g, (2, 2, 6, the 6-tetramethyl piperidine) sebate 0.3g, antioxidant 1010 0.2g, in vacuum tightness, be under the condition of 0.098Mpa, temperature is after the stirrer of the double-planet with the high speed dispersion dish of 40 ℃ carries out dispersed with stirring 2.5h, under normal pressure high pure nitrogen protection, add the 0.003% amine surface drying catalyzer that accounts for the said mixture total mass, γ-Racemic glycidol oxygen propyl trimethoxy silicane 15g and oxazole alkanes moisture content scavenging agent 5g, dispersed with stirring 0.3h, in vacuum tightness, be under the condition of 0.098Mpa, deviate from small molecules and be uniformly mixed 0.3h, the polyurethane sealant that must have good tack.
Embodiment 3
A kind of polyurethane sealant with good tack comprises the raw material that following mass percent forms:
Base polyurethane prepolymer for use as: 35%; Phenyl alkylsulf: 25%; Molecular weight is 2500 hydroxy'terminated butadiene nitrile rubber: 2.5%; Siloxanes thixotropic agent with polyoxygenated alkene side chain: 1.5%; Hollow glass microbead: 32.9%; (2,2,6,6-tetramethyl piperidine) sebate: 0.05%; Irganox 5057:0.05%; N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane: 2%; Vinyltrimethoxy silane: 1%.
(1) above-mentioned base polyurethane prepolymer for use as gets by preparation, its preparation method is: add molecular weight and be the polyether glycol 400g of 5000 liang of functionality and polyether glycol 600g that molecular weight is 5000 three-functionality-degrees in reactor, stirring the also temperature of conditioned reaction still is 90 ℃, after mixing, in vacuum tightness, be under the condition of 0.095Mpa, 3.5h dewaters, be cooled to 75 ℃, after homo(io)thermism, add 136.5g ditan-4, 4 '-vulcabond, and add 0.001% the modification organotin catalysts that accounts for the said mixture total mass, reaction 3.0h, obtain base polyurethane prepolymer for use as.
(2) has the preparation method of the polyurethane sealant of good tack: by prepared base polyurethane prepolymer for use as 350g and the dried phenyl alkylsulf 250g of process vaccum dewatering, the hydroxy'terminated butadiene nitrile rubber 25g of molecular weight 2500, siloxanes thixotropic agent 15g with polyoxygenated alkene side chain, hollow glass microballoon 329g, (2, 2, 6, the 6-tetramethyl piperidine) sebate 0.5g, Irganox 5057 0.5g, in vacuum tightness, be under the condition of 0.094Mpa, temperature is after in the three-roll grinder of 45 ℃, carrying out grinding distribution 3.0h, under normal pressure high pure nitrogen protection, add the 0.003% amine surface drying catalyzer that accounts for the said mixture total mass, N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane 20g and vinyltrimethoxy silane 10g, dispersed with stirring 0.3h, in vacuum tightness, be under the condition of 0.094Mpa, deviate from small molecules and be uniformly mixed 0.7h, the polyurethane sealant that must have good tack.
Embodiment 4
A kind of polyurethane sealant with good tack comprises the raw material that following mass percent forms:
Base polyurethane prepolymer for use as: 40%; Terephthalic acid dibutyl ester: 20%; Paste PVC powder: 7.5%; Hydrogenated castor oil: 8%; The active fine particle calcium carbonate of 5000 orders: 21.32%; 4-benzoyloxy-2,2,6,6-tetramethyl piperidine: 0.05%; B225:0.03%; β-(3,4-epoxy group(ing) hexyl) ethyl trimethoxy silane: 2.5%; Vinyltrimethoxy silane: 0.6%.
(1) above-mentioned base polyurethane prepolymer for use as gets by preparation, its preparation method is: add molecular weight and be the polyether glycol 300g of 3000 liang of functionality and polyether glycol 700g that molecular weight is 8000 three-functionality-degrees in reactor, stirring the also temperature of conditioned reaction still is 95 ℃, after mixing, in vacuum tightness, be under the condition of 0.097Mpa, 4.5h dewaters, be cooled to 70 ℃, after homo(io)thermism, add the 88.5g tolylene diisocyanate, and add 0.005% the dibutyltin diacetate catalyzer that accounts for the said mixture total mass, reaction 3.5h, obtain base polyurethane prepolymer for use as.
(2) has the preparation method of the polyurethane sealant of good tack: by prepared base polyurethane prepolymer for use as 400g and the dried terephthalic acid dibutyl ester of process vaccum dewatering 200g, paste PVC powder 75g, hydrogenated castor oil 80g, the active fine particle calcium carbonate 213.2g of 5000 orders, 4-benzoyloxy-2, 2, 6, 6-tetramethyl piperidine 0.5g, B225 0.3g, in vacuum tightness, be under the condition of 0.093Mpa, temperature is after in the three-roll grinder of 35 ℃, carrying out grinding distribution 5.0h, under normal pressure high pure nitrogen protection, add the 0.004% amine surface drying catalyzer that accounts for the said mixture total mass, β-(3, 4-epoxy group(ing) hexyl) ethyl trimethoxy silane 25g and vinyltrimethoxy silane 6g, dispersed with stirring 1.0h, in vacuum tightness, be under the condition of 0.093Mpa, deviate from small molecules and be uniformly mixed 1.0h, the polyurethane sealant that must have good tack.
Embodiment 5
A kind of polyurethane sealant with good tack comprises the raw material that following mass percent forms:
Base polyurethane prepolymer for use as: 45%; Diisononyl phthalate: 20%; The isocyanate terminated paracril of molecular weight 2000: 10%; Diatomite: 1%; Carbon black: 20.06%; 4-benzoyloxy-2,2,6,6-tetramethyl piperidine: 0.02%; B225:0.02%; γ-methacryloxypropyl trimethoxy silane: 3%; Vinyltrimethoxy silane: 0.9%.
(1) above-mentioned base polyurethane prepolymer for use as gets by preparation, its preparation method is: add molecular weight and be the polyether glycol 1000g of 5000 three-functionality-degrees in reactor, stirring the also temperature of conditioned reaction still is 95 ℃, after mixing, in vacuum tightness, be under the condition of 0.097Mpa, 5.0h dewaters, be cooled to 70 ℃, after homo(io)thermism, add 157.5g ditan-4,4 '-vulcabond, and add 0.005% the modification organotin catalysts that accounts for the said mixture total mass, reaction 4.0h, obtain base polyurethane prepolymer for use as.
(2) has the preparation method of the polyurethane sealant of good tack: by prepared base polyurethane prepolymer for use as 450g and the dried diisononyl phthalate 200g of process vaccum dewatering, the isocyanate terminated basic paracril 100g of molecular weight 2000, diatomite 10g, carbon black 200.6g, 4-benzoyloxy-2, 2, 6, 6-tetramethyl piperidine 0.2g, B225 0.2g, in vacuum tightness, be 0.092Mpa, temperature is after in the three-roll grinder of 35 ℃, carrying out grinding distribution 4.5h, under normal pressure high pure nitrogen protection, add the 0.005% amine surface drying catalyzer that accounts for the said mixture total mass, γ-methacryloxypropyl trimethoxy silane 30g and vinyltrimethoxy silane 9g, dispersed with stirring 0.8h, in vacuum tightness, be under the condition of 0.092Mpa, deviate from small molecules and be uniformly mixed 1.0h, the polyurethane sealant that must have good tack.
The performance comparison table of the various embodiments described above product and Comparative Examples product, see the following form 1.
The performance comparison table of each embodiment product of table 1 and Comparative Examples
Finally should be noted that; above embodiment is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; although with reference to preferred embodiment, the present invention has been done to explain; those of ordinary skill in the art is to be understood that; can modify or be equal to replacement technical scheme of the present invention, and not break away from essence and the scope of technical solution of the present invention.
Claims (9)
1. the polyurethane sealant with good tack, is characterized in that, comprises the raw material that following mass percent forms:
Base polyurethane prepolymer for use as 15～45%;
Softening agent 10～40%;
Initial bonding strength promotor 0.5～15%;
Thixotropic agent 1～10%;
Filler 5～30%;
Photostabilizer 0.1～0.5%;
Oxidation inhibitor 0.1～0.5%;
Silicane adhesion promoters 0.5～3%;
Moisture content scavenging agent 0.1～1.5%;
Wherein, described initial bonding strength promotor is Gum Rosin, terpine resin, coumarone indene resin, molecular weight are not less than 2000, cyano content is 5～20% terminal hydroxy group, end carboxyl or isocyanate terminated basic paracril, calcium oxide, calcium hydroxide, paste PVC powder, particle diameter are the nano carbon blacks of 50～300nm, and molecular weight is any in the liquid polybutadiene of 600～8000 end sulfydryl liquid polysulfide rubber and terminal hydroxy group, isocyanate terminated or end carboxyl;
wherein, described base polyurethane prepolymer for use as gets by preparation, its preparation method is: by mass ratio, be that the polyether glycol of two functionality of 1:0.1～1.5 and the polyether glycol of three-functionality-degree join in reactor, stirring the also temperature of conditioned reaction still is 90～150 ℃, in vacuum tightness, be not less than under the condition of 0.092Mpa, 2～5h dewaters, be cooled to 60～80 ℃, after temperature-stable, to adding NCO/OH in reactor, be 1.2～2.5 isocyanate curing agent and 0.001～0.005% the organic tin catalyzer that accounts for the said mixture total mass again, after reaction 2～5h, obtain base polyurethane prepolymer for use as.
2. a kind of polyurethane sealant with good tack according to claim 1, is characterized in that, comprises the raw material that following mass percent forms:
Base polyurethane prepolymer for use as 15～30%;
Softening agent 10～40%;
Initial bonding strength promotor 1～7.5%;
Thixotropic agent 1～10%;
Filler 5～30%;
Photostabilizer 0.1～0.5%;
Oxidation inhibitor 0.1～0.5%;
Silicane adhesion promoters 0.5～3%;
Moisture content scavenging agent 0.1～1.5%.
3. a kind of polyurethane sealant with good tack according to claim 1, is characterized in that, comprises the raw material that following mass percent forms:
Base polyurethane prepolymer for use as 30～45%;
Softening agent 10～40%;
Initial bonding strength promotor 7.5～15%;
Thixotropic agent 1～10%;
Filler 5～30%;
Photostabilizer 0.1～0.5%;
Oxidation inhibitor 0.1～0.5%;
Silicane adhesion promoters 0.5～3%;
Moisture content scavenging agent 0.1～1.5%.
4. the described a kind of polyurethane sealant with good tack of any one according to claim 1 to 3, it is characterized in that: described softening agent is any in o-phthalic acid dibutyl ester, Dinonylphthalate, diisononyl phthalate, Di Iso Decyl Phthalate, hexanodioic acid dibutyl ester, didecyl adipate, phenyl alkylsulf and terephthalic acid dibutyl ester.
5. the described a kind of polyurethane sealant with good tack of any one according to claim 1 to 3 is characterized in that: described thixotropic agent be nano fumed silica, nm-class active calcium carbonate, organic modification montmonrillonite, wilkinite, hydrogenated castor oil, diatomite, polyamide-based thixotropic agent, with the siloxanes thixotropic agent of polyoxygenated alkene side chain and in nanometer carbon black any or several.
6. the described a kind of polyurethane sealant with good tack of any one according to claim 1 to 3 is characterized in that: described filler be particle diameter be 800～10000 purpose coarse whitings, particle diameter be 800～5000 kaolin, particle diameter be in 2000～8000 active fine particle calcium carbonate, hollow glass microballoon, talcum powder and carbon black any or several.
7. the described a kind of polyurethane sealant with good tack of any one according to claim 1 to 3, it is characterized in that: described photostabilizer is the UV light stabilizing agent of ultraviolet absorbers and the hindered amines of benzotriazole category; The ultraviolet absorbers of described benzotriazole category is Tinuvin213 or UV-320; The UV light stabilizing agent of described hindered amines is (2,2,6,6-tetramethyl piperidine) sebate or 4-benzoyloxy-2,2,6, the 6-tetramethyl piperidine.
8. the described a kind of polyurethane sealant with good tack of any one according to claim 1 to 3, it is characterized in that: described oxidation inhibitor is any in Irgastab PUR68, antioxidant 1010, Irganox 5057 and B225.
9. the described a kind of polyurethane sealant with good tack of any one according to claim 1 to 3, it is characterized in that: described silicane adhesion promoters is γ mercaptopropyitrimethoxy silane, γ-sulfydryl propyl-triethoxysilicane, β-(3, 4-epoxy group(ing) hexyl) ethyl trimethoxy silane, γ-aminopropyl triethoxysilane, N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane, γ-methacryloxypropyl trimethoxy silane, any in γ-aminopropyltrimethoxysilane and γ-Racemic glycidol oxygen propyl trimethoxy silicane or several, described moisture content scavenging agent is any in silane coupling agent, triethyl orthoformate and the oxazole alkanes moisture content scavenging agent of the reaction that easily is hydrolyzed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103736827A CN102504750B (en) | 2011-11-22 | 2011-11-22 | Polyurethane sealant with good initial adhesion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103736827A CN102504750B (en) | 2011-11-22 | 2011-11-22 | Polyurethane sealant with good initial adhesion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102504750A CN102504750A (en) | 2012-06-20 |
| CN102504750B true CN102504750B (en) | 2013-11-20 |
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| CN2011103736827A Active CN102504750B (en) | 2011-11-22 | 2011-11-22 | Polyurethane sealant with good initial adhesion |
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| CN109762506B (en) * | 2019-01-28 | 2020-07-28 | 杭州之江新材料有限公司 | Polyurethane section seepage-proofing adhesive |
| CN110041489A (en) * | 2019-04-22 | 2019-07-23 | 广东普赛达密封粘胶有限公司 | A kind of polyurethane sealant resistance to migration plasticizer and a kind of polyurethane building sealant |
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Address after: 523000 Guangdong city of Dongguan province Guangdong Town Village nine Pu Saida sealing adhesive Co. Ltd Patentee after: GUANGDONG PUSTAR SEALING ADHESIVE CO., LTD. Address before: 523000 Guangdong city of Dongguan Province town third Jinlong Industrial Zone Dongguan pustar sealing adhesive Co. Ltd Patentee before: Dongguan Pustar Adhesives & Sealants Co., Ltd. |