Rapid curing adhesive and preparation method thereof

Abstract

The invention discloses a rapid curing adhesive and a preparation method thereof, and the rapid curing adhesive comprises the following components in parts by weight: 10 to 40 parts of polyurethane modified polyol, 10 to 40 parts of polyester polyol, 10 to 40 parts of diisocyanate A, 0.5 to 20 parts of a chain extender, 0.1 to 5 parts of a catalyst, 1 to 10 parts of a photoinitiator, 100 to 1000 parts of a solvent, 0.5 to 20 parts of a filler, 0.1 to 5 parts of a surface additive and 1 to 20 parts of a curing agent. The polyurethane modified polyhydric alcohol is prepared from hydroxyl acrylate, diisocyanate B and trihydric alcohol. The rapid curing adhesive has the characteristics of high repairing speed, good rubbing resistance and high repairing efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of adhesives, and in particular to a fast-curing adhesive and a preparation method thereof. Background Art

[0002] With the increasing number of inflatable fabric products such as tents, inflatable cushions, and airboats, the maintenance and replacement problems faced by existing products have become increasingly prominent. At present, inflatable fabric products are being deployed in complex environments such as agriculture, cities, fire monitoring, emergency rescue, and Internet of Things applications. Material damage will also increase accordingly. To maintain the normal operation of the product and extend the service life of the existing product, fast-curing adhesives are required.

[0003] At present, the surface repair of fabric products is mostly done by brushing, etc., and the repair process is complicated and inefficient. Patent CN103627332B proposes a new type of fabric adhesive, but its formula uses water as the medium, its surface drying speed is slow, and the repair efficiency is low. Patent CN103305132A proposes a fast-curing structural adhesive and its preparation method, but after completing the positioning bonding, it still requires high temperature and long-term post-maturation process, and cannot fully achieve fast and efficient bonding and repair of products. Summary of the invention

[0004] In view of the situation and shortcomings of the prior art, the present invention provides a fast-curing adhesive and a preparation method thereof, wherein the fast-curing adhesive has the characteristics of fast repair speed, good rubbing resistance and high repair efficiency.

[0005] The first aspect of the present invention provides a fast curing adhesive, which comprises the following components, by weight: 10-40 parts of polyurethane modified polyol, 10-40 parts of polyester polyol, 10-40 parts of diisocyanate A, 0.5-20 parts of chain extender, 0.1-5 parts of catalyst, 1-10 parts of photoinitiator, 100-1000 parts of solvent, 0.5-20 parts of filler, 0.1-5 parts of surface additive, and 1-20 parts of curing agent; The polyurethane modified polyol is prepared from hydroxy acrylate, diisocyanate B and triol. Preferably, the molar ratio of hydroxy acrylate, diisocyanate B and triol is 1:1:1. Preferably, the preparation method of the polyurethane modified polyol comprises the following steps: (1) Add hydroxy acrylate, diisocyanate B and catalyst and react for a certain time; (2) Add triol to step (1) and react for a certain period of time to obtain a polyurethane modified polyol.

[0006] Preferably, in step (1), the triol is dehydrated before use, preferably the triol is vacuum dehydrated at 90-120°C for 3 hours and then cooled to 50-60°C for standby use; the reaction temperature is preferably 60-80°C, and the reaction time is preferably 1-3 hours.

[0007] Preferably, in step (2), the reaction temperature is 60-90° C. and the reaction time is 3-5 h.

[0008] Preferably, the hydroxy acrylate is one or more of hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylate, hydroxybutyl acrylate and the like.

[0009] Preferably, the diisocyanate B is one or more of hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), dicyclohexylmethane diisocyanate (HMDI), xylylene diisocyanate (XDI), tetramethyl metaxylylene diisocyanate (TMXDI), and the like.

[0010] Preferably, the triol is one or more of polycaprolactone triol, polyether triol, trimethylolethane, glycerol, trimethylolpropane, and 1,2,6-hexanetriol.

[0011] Preferably, the polyester polyol is one or more of polyethylene adipate, polybutylene adipate, polyhexylene adipate, polyethylene adipate, polybutylene adipate, polybutylene adipate terephthalate, polycaprolactone diol, and polycarbonate diol with a number average molecular weight of 1000-4000.

[0012] Preferably, the diisocyanate A is one or more of hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), dicyclohexylmethane diisocyanate (HMDI), toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), and the like.

[0013] Preferably, the chain extender is one or more of ethylene glycol, diethylene glycol, 1,2-propylene glycol, 1,4-butylene glycol, methyl propanediol, methyl pentanediol, hexanediol, neopentyl glycol and the like.

[0014] Preferably, the catalyst is one or more of stannous octoate, dibutyltin dilaurate, zinc isooctanoate, lead isooctanoate, bismuth isooctanoate and the like.

[0015] Preferably, the photoinitiator is one or more of 2-hydroxy-2-methyl-phenylpropanone-1 (1173), 1-hydroxy-cyclohexylbenzophenone (184), 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO), bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide (819), etc.

[0016] Preferably, the solvent is one or more of ethyl acetate, propyl acetate, isopropyl acetate, dimethyl carbonate, acetone, methyl ethyl ketone, methyl isopropyl ketone, methyl isobutyl ketone, toluene, xylene, N,N-dimethylformamide and the like.

[0017] Preferably, the filler is one or more of calcium carbonate, silicon dioxide, titanium dioxide, talc and the like.

[0018] Preferably, the surface additive is one or more of polysiloxane-polyether copolymer, polyether-modified polysiloxane, acrylate copolymer and the like.

[0019] Preferably, the curing agent is one or more of HDI trimer, IPDI trimer, TDI trimer, TDI-TMP adduct, polymethyl polyphenyl isocyanate, etc. The above curing agent can increase the adhesion between the cured adhesive and the substrate.

[0020] A second aspect of the present invention provides a method for preparing a fast curing adhesive, comprising the following steps: (1) adding polyurethane modified polyol, polyester polyol, diisocyanate A, a catalyst and part of the solvent to carry out a prepolymerization reaction to obtain a prepolymer; (2) adding the chain extender and the remaining solvent to the prepolymer of step (1) to carry out a chain extension reaction, and controlling the number average molecular weight of the resin to be 40,000-80,000, and then cooling to obtain a fast-curing adhesive main resin; (3) adding fillers, photoinitiators and surface additives to the main resin of step (3), dispersing and mixing, and obtaining a main resin liquid of a fast-curing adhesive; (4) The main resin liquid of the fast-curing adhesive obtained in step (3) and the curing agent are mixed and stirred evenly to obtain a fast-curing adhesive.

[0021] Preferably, in step (1), the prepolymerization temperature is 50-80°C and the reaction time is 1-5h.

[0022] Preferably, in step (2), the chain extension reaction temperature is 60-90°C, the reaction time is 1-6h, and the cooling temperature is 20-40°C.

[0023] Preferably, in step (3), the dispersion time is 0.5-3 h.

[0024] Preferably, the fast-curing adhesive can be directly sprayed on the surface of the substrate when in use, and can be quickly repaired by UV irradiation and short-term placement.

[0025] Compared with the prior art, the present invention has the following beneficial effects: 1. The fast-curing adhesive provided by the present invention uses polyurethane-modified polyols, and a double bond structure is introduced into the resin molecular structure. After UV light, the resin undergoes free radical photopolymerization, which can form a certain degree of cross-linking in a short time, so that the cohesive force of the coating resin is rapidly improved, and the bonding strength between the coating resin and the substrate is improved, thereby achieving the effect of rapid repair and molding.

[0026] 2. The main resin of the fast-curing adhesive provided by the present invention has a high molecular weight resin structure, high adjustability and good toughness, and the free radical photopolymerization in the resin structure increases the cross-linking density of the resin. The synergistic effect of the two makes the cured adhesive have the characteristics of good rubbing resistance and high repair efficiency.

[0027] 3. The fast curing adhesive provided by the present invention adopts a spraying process, is easy to use, and can achieve the purpose of rapid repair in terms of process. DETAILED DESCRIPTION

[0028] The present invention is described in detail below by way of examples, which are only used to explain the present invention but not to limit the scope of the present invention.

[0029] Example 1

[0030] 25g of polyurethane modified polyol, 40g of polybutylene adipate with a number average molecular weight of 2000, 28g of isophorone diisocyanate, 0.5g of stannous octoate and 440g of ethyl acetate were prepolymerized at 50-60°C for 1-2h to obtain a prepolymer; 7g 1,4-Butanediol and 440g methyl ethyl ketone are added to the above prepolymer, and a chain extension reaction is carried out at 60-80°C for 5-6h, and the number average molecular weight of the resin is controlled to be 70000-80000, and then the temperature is lowered to 20-40°C to obtain a fast-curing adhesive main resin; then 10g calcium carbonate, 4g photoinitiator 1173 and 0.5g surface additive polysiloxane-polyether copolymer are added to the above main resin, and dispersed and mixed for 0.5-1h to obtain a fast-curing adhesive main resin liquid; before use, the above fast-curing adhesive main resin liquid and 5g curing agent TDI trimer are mixed and stirred evenly to obtain a fast-curing adhesive.

[0031] Wherein, the preparation method of polyurethane modified polyol is as follows: First, the polycaprolactone triol PCL305 is vacuum dehydrated at 100-110°C for 3 hours, and then cooled to 50-60°C for standby use; then 100g of hydroxyethyl acrylate is added to 191.4g of isophorone diisocyanate, and 0.2g of catalyst zinc isooctanoate is added, the temperature is slowly raised and the reaction temperature is controlled at 60-70°C, and the reaction is carried out for 1 hour; then 473.6g of the dehydrated polycaprolactone triol PCL305 is added, the temperature is controlled at 80-90°C, and the reaction is carried out for 3-4 hours to obtain a polyurethane modified polyol.

[0032] Example 2

[0033] 35g of polyurethane modified polyol, 35g of polycaprolactone diol with a number average molecular weight of 1000, 25.3g of diphenylmethane diisocyanate, 2g of dibutyltin dilaurate and 300g of methyl ethyl ketone were prepolymerized at 60-70°C for 2-3h to obtain a prepolymer; 4.7g Methylpropanediol and 440g ethyl acetate are added to the above prepolymer, and a chain extension reaction is carried out at 60-70°C for 5-6h, and the number average molecular weight of the resin is controlled to be 50000-60000, and then the temperature is lowered to 20-40°C to obtain a fast-curing adhesive main resin; then 5g titanium dioxide, 8g photoinitiator 184 and 1g surface additive polyether modified polysiloxane are added to the above main resin, and dispersed and mixed for 1-2h to obtain a fast-curing adhesive main resin liquid; before use, the above fast-curing adhesive main resin liquid and 10g curing agent IPDI trimer are mixed and stirred evenly to obtain a fast-curing adhesive.

[0034] Wherein, the preparation method of polyurethane modified polyol is as follows: First, a polyoxypropylene triol with a number average molecular weight of 1500 is vacuum dehydrated at 90-100°C for 3 hours, and then cooled to 50-60°C for standby use; then 100g of hydroxyethyl acrylate is added to 145g of hexamethylene diisocyanate, and 0.3g of catalyst dibutyltin dilaurate is added, the temperature is slowly raised and the reaction temperature is controlled at 60-70°C, and the reaction is carried out for 2 hours; then 1292g of the dehydrated polyoxypropylene triol with a number average molecular weight of 1500 is added, the temperature is controlled at 70-80°C, and the reaction is carried out for 4-5 hours to obtain a polyurethane modified polyol.

[0035] Example 3

[0036] 40g of polyurethane modified polyol, 35g of polyethylene adipate with a number average molecular weight of 4000, 20.6g of dicyclohexylmethane diisocyanate, 4g of bismuth isooctanoate, 150g of ethyl acetate and 200g of N,N-dimethylformamide were prepolymerized at 70-80°C for 1-2h to obtain a prepolymer; 4.4g Diethylene glycol and 450g propyl acetate are added to the above prepolymer, and a chain extension reaction is carried out at 70-80°C for 4-5h, and the number average molecular weight of the resin is controlled to be 50000-60000, and then the temperature is lowered to 20-40°C to obtain a fast-curing adhesive main resin; then 10g talcum powder, 4.5g photoinitiator 184 and 4.5g photoinitiator TPO and 2g surface additive acrylate copolymer are added to the above main resin, and dispersed and mixed for 2-3h to obtain a fast-curing adhesive main resin liquid; before use, the above fast-curing adhesive main resin liquid and 15g curing agent multi-methyl polyphenyl isocyanate are mixed and stirred evenly to obtain a fast-curing adhesive.

[0037] Wherein, the preparation method of polyurethane modified polyol is as follows: First, a polycaprolactone triol with a number average molecular weight of 2000 is vacuum dehydrated at 90-100°C for 3 hours, and then cooled to 50-60°C for standby use; then 100g of hydroxypropyl acrylate is added to 201.3g of dicyclohexylmethane diisocyanate, and 1g of catalyst bismuth isooctanoate is added, the temperature is slowly raised and the reaction temperature is controlled at 70-80°C, and the reaction is carried out for 3 hours; then 768g of the dehydrated polycaprolactone triol with a number average molecular weight of 2000 and 52g of trimethylolpropane are added, the temperature is controlled at 70-80°C, and the reaction is carried out for 4-5 hours to obtain a polyurethane modified polyol.

[0038] Example 4

[0039] 30g of polyurethane modified polyol, 40g of polycarbonate diol with a number average molecular weight of 2000, 23.7g of isophorone diisocyanate, 4g of dibutyltin dilaurate, 150g of ethyl acetate and 300g of N,N-dimethylformamide were prepolymerized at 70-80°C for 4-5h to obtain a prepolymer; 6.3g of Diethylene glycol and 300g of dimethyl carbonate are added to the above prepolymer, and a chain extension reaction is carried out at 70-80°C for 4-5h, and the number average molecular weight of the resin is controlled to be 40000-50000, and then the temperature is lowered to 20-40°C to obtain a fast-curing adhesive main resin; then 6g of titanium dioxide, 4.5g of photoinitiator 184 and 4.5g of photoinitiator TPO and 3g of surface additive acrylate copolymer are added to the above main resin, and dispersed and mixed for 2-3h to obtain a fast-curing adhesive main resin liquid; before use, the above fast-curing adhesive main resin liquid and 5g of curing agent HDI trimer are mixed and stirred evenly to obtain a fast-curing adhesive.

[0040] Wherein, the preparation method of polyurethane modified polyol is as follows: First, trimethylolpropane is vacuum-dehydrated at 90-100°C for 3 hours, and then cooled to 50-60°C for standby use; then 100g of hydroxyethyl acrylate is added to 191.4g of isophorone diisocyanate, and 2g of dibutyltin dilaurate is added, the temperature is slowly raised and the reaction temperature is controlled at 60-70°C, and the reaction is carried out for 2 hours; then 115.5g of dehydrated trimethylolpropane is added, the temperature is controlled at 70-80°C, and the reaction is carried out for 4-5 hours to obtain a polyurethane modified polyol.

[0041] Comparative Example 1 70g of polybutylene adipate with a number average molecular weight of 2000, 23.5g of isophorone diisocyanate, 0.3g of stannous octoate and 230g of ethyl acetate were prepolymerized at 50-60°C for 1-2h to obtain a prepolymer; 6.5g 1,4-Butanediol and 230g of methyl ethyl ketone are added to the prepolymer, and a chain extension reaction is carried out at 60-80°C for 5-6h, and the number average molecular weight of the resin is controlled to be 60000-70000, and then the temperature is lowered to 20-40°C to obtain a fast-curing adhesive main resin; 10g of calcium carbonate and 0.5g of a surface additive polysiloxane-polyether copolymer are added to the main resin, and the dispersion is carried out for 0.5-1h to obtain a fast-curing adhesive main resin liquid; before use, the fast-curing adhesive main resin liquid and 5g of a curing agent TDI trimer are mixed and stirred evenly to obtain a fast-curing adhesive.

[0042] Comparative Example 2 25g of polyurethane modified polyol, 40g of polybutylene adipate with a number average molecular weight of 2000, 29g of isophorone diisocyanate, 0.5g of stannous octoate and 440g of ethyl acetate were prepolymerized at 50-60°C for 1-2h to obtain a prepolymer; 6g 1,4-Butanediol and 440g methyl ethyl ketone are added to the above prepolymer, and a chain extension reaction is carried out at 60-80°C for 5-6h, and the number average molecular weight of the resin is controlled to be 100000-110000, and then the temperature is lowered to 20-40°C to obtain a fast-curing adhesive main resin; then 10g calcium carbonate, 4g photoinitiator 1173 and 0.5g surface additive polysiloxane-polyether copolymer are added to the above main resin, and dispersed and mixed for 0.5-1h to obtain a fast-curing adhesive main resin liquid; before use, the above fast-curing adhesive main resin liquid and 5g curing agent TDI trimer are mixed and stirred evenly to obtain a fast-curing adhesive.

[0043] Wherein, the preparation method of polyurethane modified polyol is as follows: First, the polycaprolactone triol PCL305 is vacuum dehydrated at 100-110°C for 3 hours, and then cooled to 50-60°C for standby use; then 100g of hydroxyethyl acrylate is added to 191.4g of isophorone diisocyanate, and 0.2g of catalyst zinc isooctanoate is added, the temperature is slowly raised and the reaction temperature is controlled at 60-70°C, and the reaction is carried out for 1 hour; then 473.6g of the dehydrated polycaprolactone triol PCL305 is added, the temperature is controlled at 80-90°C, and the reaction is carried out for 3-4 hours to obtain a polyurethane modified polyol.

[0044] Comparative Example 3 25g of polyurethane modified polyol, 40g of polybutylene adipate with a number average molecular weight of 2000, 26.6g of isophorone diisocyanate, 0.5g of stannous octoate and 440g of ethyl acetate were prepolymerized at 50-60°C for 1-2h to obtain a prepolymer; 8.4g of 1,4-Butanediol and 440g methyl ethyl ketone are added to the above prepolymer, and a chain extension reaction is carried out at 60-80°C for 5-6h, and the number average molecular weight of the resin is controlled to be 20000-30000, and then the temperature is lowered to 20-40°C to obtain a fast-curing adhesive main resin; then 10g calcium carbonate, 4g photoinitiator 1173 and 0.5g surface additive polysiloxane-polyether copolymer are added to the above main resin, and dispersed and mixed for 0.5-1h to obtain a fast-curing adhesive main resin liquid; before use, the above fast-curing adhesive main resin liquid and 5g curing agent TDI trimer are mixed and stirred evenly to obtain a fast-curing adhesive.

[0045] Wherein, the preparation method of polyurethane modified polyol is as follows: First, the polycaprolactone triol PCL305 is vacuum dehydrated at 100-110°C for 3 hours, and then cooled to 50-60°C for standby use; then 100g of hydroxyethyl acrylate is added to 191.4g of isophorone diisocyanate, and 0.2g of catalyst zinc isooctanoate is added, the temperature is slowly raised and the reaction temperature is controlled at 60-70°C, and the reaction is carried out for 1 hour; then 473.6g of the dehydrated polycaprolactone triol PCL305 is added, the temperature is controlled at 80-90°C, and the reaction is carried out for 3-4 hours to obtain a polyurethane modified polyol.

[0046] Comparative Example 4 70g of polyurethane modified polyol, 24.5g of diphenylmethane diisocyanate, 2g of dibutyltin dilaurate and 300g of methyl ethyl ketone are subjected to prepolymerization at 60-70°C for 2-3h to obtain a prepolymer; 5.5g of methyl propylene glycol and 267g of ethyl acetate are added to the prepolymer, and a chain extension reaction is carried out at 60-70°C for 5-6h, and the number average molecular weight of the resin is controlled to be 50000-60000, and then the temperature is lowered to 20-40°C to obtain a main resin of a quick repair agent; 5g of titanium dioxide, 8g of photoinitiator 184 and 1g of surface additive polyether modified polysiloxane are added to the main resin, and dispersed and mixed for 1-2h to obtain a main resin liquid of a quick repair agent; before use, the main resin liquid of the quick repair agent and 10g of a curing agent IPDI trimer are mixed and stirred evenly to obtain a quick repair agent.

[0047] Wherein, the preparation method of polyurethane modified polyol is as follows: First, a polyoxypropylene triol with a number average molecular weight of 1500 is vacuum dehydrated at 90-100°C for 3 hours, and then cooled to 50-60°C for standby use; then 100g of hydroxyethyl acrylate is added to 145g of hexamethylene diisocyanate, and 0.3g of catalyst dibutyltin dilaurate is added, the temperature is slowly raised and the reaction temperature is controlled at 60-70°C, and the reaction is carried out for 2 hours; then 1292g of the dehydrated polyoxypropylene triol with a number average molecular weight of 1500 is added, the temperature is controlled at 70-80°C, and the reaction is carried out for 4-5 hours to obtain a polyurethane modified polyol.

[0048] Performance test method: With the inflatable fabric product material with PVF surface as the substrate, the adhesive prepared in the embodiment and comparative example is sprayed on the surface of the material with micropores or slight wear, and the repair is completed after UV light irradiation for 10 seconds and then placed for 10 minutes, and then the performance test is performed. The helium permeability of the repaired material is tested, and a room temperature rubbing test is performed 270 times. The results are shown in the following table.

[0049]

[0050] From the performance parameters in the table: the performance of the fast curing adhesive in the embodiment is faster in repair speed, higher in repair efficiency and better in rubbing resistance than that in comparative example 1; and better in repair effect and better in rubbing resistance than that in comparative examples 2, 3 and 4. Therefore, the fast curing adhesive of the present invention has the characteristics of fast repair speed, high repair efficiency and good rubbing resistance, and can realize the fast repair of inflatable fabric products.

Claims

1. A fast curing adhesive, comprising the following components by weight: 10-40 parts of polyurethane modified polyol, 10-40 parts of polyester polyol, 10-40 parts of diisocyanate A, 0.5-20 parts of chain extender, 0.1-5 parts of catalyst, 1-10 parts of photoinitiator, 100-1000 parts of solvent, 0.5-20 parts of filler, 0.1-5 parts of surface additive, and 1-20 parts of curing agent; The polyurethane modified polyol is prepared from hydroxy acrylate, diisocyanate B and triol.

2. The fast curing adhesive according to claim 1, characterized in that The preparation method of the polyurethane modified polyol comprises the following steps: (1) Add hydroxy acrylate, diisocyanate B and catalyst and react for a certain time; (2) Add triol to step (1) and react for a certain period of time to obtain a polyurethane modified polyol.

3. The fast curing adhesive according to claim 1 or 2, characterized in that: The hydroxy acrylate is one or more of hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylate, and hydroxybutyl acrylate.

4. The fast curing adhesive according to claim 1 or 2, characterized in that: The diisocyanate B is one or more of hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), dicyclohexylmethane diisocyanate (HMDI), xylylene diisocyanate (XDI), and tetramethyl metaxylylene diisocyanate (TMXDI).

5. The fast curing adhesive according to claim 1 or 2, characterized in that: The triol is one or more of polycaprolactone triol, polyether triol, trimethylolethane, glycerol, trimethylolpropane, and 1,2,6-hexanetriol.

6. The fast curing adhesive according to claim 1 or 2, characterized in that: The polyester polyol is one or more of polyethylene adipate, polybutylene adipate, polyhexylene adipate, polyethylene adipate, polybutylene adipate, polybutylene adipate terephthalate, polycaprolactone diol and polycarbonate diol with a number average molecular weight of 1000-4000.

7. The fast curing adhesive according to claim 1 or 2, characterized in that: The diisocyanate A is one or more of hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), dicyclohexylmethane diisocyanate (HMDI), toluene diisocyanate (TDI), and diphenylmethane diisocyanate (MDI).

8. The fast curing adhesive according to claim 1 or 2, characterized in that: The chain extender is one or more of ethylene glycol, diethylene glycol, 1,2-propylene glycol, 1,4-butylene glycol, methyl propanediol, methyl pentanediol, hexanediol and neopentyl glycol.

9. The fast curing adhesive according to claim 1 or 2, characterized in that: The curing agent is one or more of HDI trimer, IPDI trimer, TDI trimer, TDI-TMP adduct, and polymethyl polyphenyl isocyanate.

10. A method for preparing the fast curing adhesive according to any one of claims 1 to 9, comprising the following steps: (1) adding polyurethane modified polyol, polyester polyol, diisocyanate A, a catalyst and part of the solvent to carry out a prepolymerization reaction to obtain a prepolymer; (2) adding the chain extender and the remaining solvent to the prepolymer of step (1) to carry out a chain extension reaction, and controlling the number average molecular weight of the resin to be 40,000-80,000, and then cooling to obtain a fast-curing adhesive main resin; (3) adding fillers, photoinitiators and surface additives to the main resin of step (3), dispersing and mixing, and obtaining a main resin liquid of a fast-curing adhesive; (4) The main resin liquid of the fast-curing adhesive obtained in step (3) and the curing agent are mixed and stirred evenly to obtain a fast-curing adhesive.

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