CN105315952A - One-component polyurethane adhesive and preparing method thereof - Google Patents
One-component polyurethane adhesive and preparing method thereof Download PDFInfo
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- CN105315952A CN105315952A CN201510817434.5A CN201510817434A CN105315952A CN 105315952 A CN105315952 A CN 105315952A CN 201510817434 A CN201510817434 A CN 201510817434A CN 105315952 A CN105315952 A CN 105315952A
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Abstract
The invention provides a one-component polyurethane adhesive. The adhesive is prepared from, by weight, 40-60 parts of polyhydric alcohols, 20-25 parts of isocyanate, 0.1-0.6 part of chain extender, 9-12 parts of plasticizer, 0.01-0.1 part of catalyst, 10-15 parts of solvent, 8-10 parts of tackifier, 1-2 parts of cross-linking agent, 6-8 parts of titanium diboride and 9-10 parts of PES. The invention further provides a preparing method of the one-component polyurethane adhesive. The water resistance and heat resistance of the one-component polyurethane adhesive are high, and the one-component polyurethane adhesive is adaptable to a hygrothermal environment.
Description
Technical field:
The present invention relates to a kind of sizing agent, particularly relate to a kind of single-component polyurethane adhesive and preparation method thereof.
Background technology:
Adhesive for polyurethane refers to the sizing agent containing carbamate groups (-NHCOO-) or isocyanate group (-NCO) in molecular chain, adhesive for polyurethane is divided into polyisocyanates and the large class of urethane two, containing isocyano-(-NCO) and carbamate groups (-NH-COO-) in polyisocyanate molecule chain, therefore adhesive for polyurethane shows activity and the polarity of height, with the base material containing reactive hydrogen, as foam, plastics, timber, leather, fabric, paper, the porous materials such as pottery, and metal, glass, rubber, the material of any surface finish such as plastics has excellent chemical adhesive power.Adhesive for polyurethane possesses excellent shear strength and impact property, is applicable to various structural bonding field, and possesses excellent flexible nature.Adhesive for polyurethane possesses excellent rubber property, can adapt to the bonding of different heat expansion coefficient base material, and can form soft-hard transition layer between base material, not only bonding force is strong, also has excellent buffering, shock-absorbing function simultaneously.The low temperature of the gluing stick of urethane and very low temperature performance exceed the sizing agent of every other type.The feature such as Aqueous Polyurethane Adhesives has low VOC content, low or non-environmental-pollution, do not fire is the prior development direction of adhesive for polyurethane.
Such as, publication number is CN102585754B, publication date is 2013.12.18, apply for that the Chinese patent application of artificial Langfang City North Star foundation resin material company limited discloses " a kind of solvent-type single-component polyurethane adhesive and preparation method thereof ", its processing step is: be first that the polyether glycol of 60-100 part vacuumizes and dewaters by parts by weight, then adding parts by weight is that the diphenylmethanediisocyanate of 100 parts reacts, add the catalyzer that solvent that parts by weight are 40-80 part and number are 0.5-2.5 part again, stirring reaction, finally add the stablizer that parts by weight are 0.01-0.2 part, stirring reaction, filter discharging, sealing is preserved, obtain adhesive for polyurethane.The gas release of this sizing agent doubly increases 5-8 doubly by the 3-4 of usual production, can better incorporate base material and core, reach best bond state; Its storage period extended to 11-13 month by 3-6 month, solve manufacturer and user produce and use, very large problem in preservation.But, there is certain defect in this sizing agent: water tolerance and thermotolerance poor, in hygrothermal environment, performance suppression ratio is more serious.
Summary of the invention:
The technical problem to be solved in the present invention is to provide a kind of single-component polyurethane adhesive, and its water tolerance and thermotolerance better, can be applicable to hygrothermal environment.
For solving the problems of the technologies described above, technical scheme of the present invention is:
A kind of single-component polyurethane adhesive, its component and parts by weight are: polyvalent alcohol 40 ~ 60 parts, isocyanic ester 20 ~ 25 parts, chainextender 0.1 ~ 0.6 part, 9 ~ 12 parts, softening agent, catalyzer 0.01 ~ 0.1 part, solvent 10 ~ 15 parts, tackifier 8 ~ 10 parts, linking agent 1 ~ 2 part, TiB2 6 ~ 8 parts, PES9 ~ 10 part.
Preferably, polyvalent alcohol of the present invention is vegetable oil polyol.
Preferably, isocyanic ester of the present invention is MDI.
Preferably, chainextender of the present invention is trolamine.
Preferably, softening agent of the present invention is DIDP or DINP.
Preferably, catalyzer of the present invention is organic tin catalyzer.
Preferably, solvent of the present invention is hydrochloric ether.
Preferably, tackifier of the present invention are ester gum.
Preferably, linking agent of the present invention is TriMethylolPropane(TMP).
Another technical problem that the present invention will solve is to provide the preparation method of above-mentioned single-component polyurethane adhesive.
For solving the problems of the technologies described above, technical scheme is:
A preparation method for single-component polyurethane adhesive, its step is as follows:
(1) silane coupling agent is added deionized water for stirring evenly obtained concentration be the coupling agent solution of 12%, ph value is regulated to be add TiB2 powder after 3.2 with hydrochloric acid, the weight ratio of silane coupling agent and TiB2 powder is 1:24, put into ultrasonic cleaner ultrasonic disperse 30 minutes, centrifugation after staticly settling 10 hours, be dried to constant weight at throw out being washed latter 90 DEG C, obtain modification TiB2 after grinding for subsequent use;
(2) polyvalent alcohol, isocyanic ester are added stirring tank, stirring reaction 3 hours at 85 DEG C, add chainextender and continue stirring 1 hour, obtain performed polymer;
(3) performed polymer step (2) obtained, solvent, tackifier, linking agent are uniformly mixed 20 minutes, stirring is continued 20 minutes after being warming up to 45 DEG C, add softening agent, modification TiB2 that PES, step (1) obtain, be warming up to 90 DEG C to stir 3 hours, catalyzer is added after being cooled to 45 DEG C, stir 40 minutes, obtain single-component polyurethane adhesive.
Therefore compared with prior art, the present invention has following beneficial effect:
1) PES is that the English of polyethersulfone is write a Chinese character in simplified form, containing isopropylidene, ether, sulfuryl and penylene in its molecular structure, isopropylidene and ether make PES have good hydrolytic resistance, the degree of crosslinking of adhesive for polyurethane inside can be increased, and the three-dimensional net structure closely produced to a certain degree, reduce the degradation amplitude of sizing agent in hygrothermal environment, greatly improve the water tolerance of sizing agent; Phenyl in PES structure and sulfuryl make PES have good thermotolerance, therefore also effectively can improve the thermotolerance of sizing agent.
2) TiB2 is a kind of inorganic materials of resistance to elevated temperatures excellence, but its surface is wetting ability, and consistency is poor between polyurethane matrix, thus the present invention carries out surface modification by silane coupling agent to it, silane coupling agent hydrolysis hydroxyl that is rear and its surface reacts, the wetting ability of TiB2 surface is become the lipophilicity containing organo-functional group, improve itself and polyurethane matrix consistency and and interface binding power between the two interface, thus substantially increase heat decomposition temperature and the thermotolerance of sizing agent.
Embodiment:
Describe the present invention in detail below in conjunction with specific embodiment, be used for explaining the present invention in this illustrative examples of the present invention and explanation, but not as a limitation of the invention.
Embodiment 1
Single-component polyurethane adhesive, its component and parts by weight are: vegetable oil polyol 45 parts, MDI23 part, trolamine 0.1 part, DIDP12 part, organic tin catalyzer 0.05 part, hydrochloric ether 14 parts, ester gum 10 parts, TriMethylolPropane(TMP) 1.2 parts, TiB2 7.5 parts, PES9.3 part.
The step of its preparation method is as follows:
(1) silane coupling agent is added deionized water for stirring evenly obtained concentration be the coupling agent solution of 12%, ph value is regulated to be add TiB2 powder after 3.2 with hydrochloric acid, the weight ratio of silane coupling agent and TiB2 powder is 1:24, put into ultrasonic cleaner ultrasonic disperse 30 minutes, centrifugation after staticly settling 10 hours, be dried to constant weight at throw out being washed latter 90 DEG C, obtain modification TiB2 after grinding for subsequent use;
(2) vegetable oil polyol, MDI are added stirring tank, stirring reaction 3 hours at 85 DEG C, add trolamine and continue stirring 1 hour, obtain performed polymer;
(3) performed polymer step (2) obtained, hydrochloric ether, ester gum, TriMethylolPropane(TMP) are uniformly mixed 20 minutes, stirring is continued 20 minutes after being warming up to 45 DEG C, add DIDP, PES, modification TiB2 that step (1) obtains, be warming up to 90 DEG C to stir 3 hours, organic tin catalyzer is added after being cooled to 45 DEG C, stir 40 minutes, obtain single-component polyurethane adhesive.
Embodiment 2
Single-component polyurethane adhesive, its component and parts by weight are: vegetable oil polyol 40 parts, MDI25 part, trolamine 0.4 part, DINP10.5 part, organic tin catalyzer 0.06 part, hydrochloric ether 11 parts, ester gum 8.5 parts, TriMethylolPropane(TMP) 1.6 parts, TiB2 7 parts, PES9.6 part.
The step of its preparation method is as follows:
(1) silane coupling agent is added deionized water for stirring evenly obtained concentration be the coupling agent solution of 12%, ph value is regulated to be add TiB2 powder after 3.2 with hydrochloric acid, the weight ratio of silane coupling agent and TiB2 powder is 1:24, put into ultrasonic cleaner ultrasonic disperse 30 minutes, centrifugation after staticly settling 10 hours, be dried to constant weight at throw out being washed latter 90 DEG C, obtain modification TiB2 after grinding for subsequent use;
(2) vegetable oil polyol, MDI are added stirring tank, stirring reaction 3 hours at 85 DEG C, add trolamine and continue stirring 1 hour, obtain performed polymer;
(3) performed polymer step (2) obtained, hydrochloric ether, ester gum, TriMethylolPropane(TMP) are uniformly mixed 20 minutes, stirring is continued 20 minutes after being warming up to 45 DEG C, add DINP, PES, modification TiB2 that step (1) obtains, be warming up to 90 DEG C to stir 3 hours, organic tin catalyzer is added after being cooled to 45 DEG C, stir 40 minutes, obtain single-component polyurethane adhesive.
Embodiment 3
Single-component polyurethane adhesive, its component and parts by weight are: vegetable oil polyol 60 parts, MDI20 part, trolamine 0.2 part, DIDP11.5 part, organic tin catalyzer 0.04 part, hydrochloric ether 13 parts, ester gum 8.8 parts, TriMethylolPropane(TMP) 1 part, TiB2 6.5 parts, PES9 part.
The step of its preparation method is as follows:
(1) silane coupling agent is added deionized water for stirring evenly obtained concentration be the coupling agent solution of 12%, ph value is regulated to be add TiB2 powder after 3.2 with hydrochloric acid, the weight ratio of silane coupling agent and TiB2 powder is 1:24, put into ultrasonic cleaner ultrasonic disperse 30 minutes, centrifugation after staticly settling 10 hours, be dried to constant weight at throw out being washed latter 90 DEG C, obtain modification TiB2 after grinding for subsequent use;
(2) vegetable oil polyol, MDI are added stirring tank, stirring reaction 3 hours at 85 DEG C, add trolamine and continue stirring 1 hour, obtain performed polymer;
(3) performed polymer step (2) obtained, hydrochloric ether, ester gum, TriMethylolPropane(TMP) are uniformly mixed 20 minutes, stirring is continued 20 minutes after being warming up to 45 DEG C, add DIDP, PES, modification TiB2 that step (1) obtains, be warming up to 90 DEG C to stir 3 hours, organic tin catalyzer is added after being cooled to 45 DEG C, stir 40 minutes, obtain single-component polyurethane adhesive.
Embodiment 4
Single-component polyurethane adhesive, its component and parts by weight are: vegetable oil polyol 50 parts, MDI24 part, trolamine 0.6 part, DIDP9 part, organic tin catalyzer 0.08 part, hydrochloric ether 12 parts, ester gum 9 parts, TriMethylolPropane(TMP) 1.8 parts, TiB2 8 parts, PES9.5 part.
The step of its preparation method is as follows:
(1) silane coupling agent is added deionized water for stirring evenly obtained concentration be the coupling agent solution of 12%, ph value is regulated to be add TiB2 powder after 3.2 with hydrochloric acid, the weight ratio of silane coupling agent and TiB2 powder is 1:24, put into ultrasonic cleaner ultrasonic disperse 30 minutes, centrifugation after staticly settling 10 hours, be dried to constant weight at throw out being washed latter 90 DEG C, obtain modification TiB2 after grinding for subsequent use;
(2) vegetable oil polyol, MDI are added stirring tank, stirring reaction 3 hours at 85 DEG C, add trolamine and continue stirring 1 hour, obtain performed polymer;
(3) performed polymer step (2) obtained, hydrochloric ether, ester gum, TriMethylolPropane(TMP) are uniformly mixed 20 minutes, stirring is continued 20 minutes after being warming up to 45 DEG C, add DIDP, PES, modification TiB2 that step (1) obtains, be warming up to 90 DEG C to stir 3 hours, organic tin catalyzer is added after being cooled to 45 DEG C, stir 40 minutes, obtain single-component polyurethane adhesive.
Embodiment 5
Single-component polyurethane adhesive, its component and parts by weight are: vegetable oil polyol 55 parts, MDI21 part, trolamine 0.3 part, DINP10 part, organic tin catalyzer 0.01 part, hydrochloric ether 15 parts, ester gum 9.5 parts, TriMethylolPropane(TMP) 1.5 parts, TiB2 6.6 parts, PES9.9 part.
The step of its preparation method is as follows:
(1) silane coupling agent is added deionized water for stirring evenly obtained concentration be the coupling agent solution of 12%, ph value is regulated to be add TiB2 powder after 3.2 with hydrochloric acid, the weight ratio of silane coupling agent and TiB2 powder is 1:24, put into ultrasonic cleaner ultrasonic disperse 30 minutes, centrifugation after staticly settling 10 hours, be dried to constant weight at throw out being washed latter 90 DEG C, obtain modification TiB2 after grinding for subsequent use;
(2) vegetable oil polyol, MDI are added stirring tank, stirring reaction 3 hours at 85 DEG C, add trolamine and continue stirring 1 hour, obtain performed polymer;
(3) performed polymer step (2) obtained, hydrochloric ether, ester gum, TriMethylolPropane(TMP) are uniformly mixed 20 minutes, stirring is continued 20 minutes after being warming up to 45 DEG C, add DINP, PES, modification TiB2 that step (1) obtains, be warming up to 90 DEG C to stir 3 hours, organic tin catalyzer is added after being cooled to 45 DEG C, stir 40 minutes, obtain single-component polyurethane adhesive.
Embodiment 6
Single-component polyurethane adhesive, its component and parts by weight are: vegetable oil polyol 44 parts, MDI22 part, trolamine 0.5 part, DINP11 part, organic tin catalyzer 0.1 part, hydrochloric ether 10 parts, ester gum 8 parts, TriMethylolPropane(TMP) 2 parts, TiB2 6 parts, PES10 part.
The step of its preparation method is as follows:
(1) silane coupling agent is added deionized water for stirring evenly obtained concentration be the coupling agent solution of 12%, ph value is regulated to be add TiB2 powder after 3.2 with hydrochloric acid, the weight ratio of silane coupling agent and TiB2 powder is 1:24, put into ultrasonic cleaner ultrasonic disperse 30 minutes, centrifugation after staticly settling 10 hours, be dried to constant weight at throw out being washed latter 90 DEG C, obtain modification TiB2 after grinding for subsequent use;
(2) vegetable oil polyol, MDI are added stirring tank, stirring reaction 3 hours at 85 DEG C, add trolamine and continue stirring 1 hour, obtain performed polymer;
(3) performed polymer step (2) obtained, hydrochloric ether, ester gum, TriMethylolPropane(TMP) are uniformly mixed 20 minutes, stirring is continued 20 minutes after being warming up to 45 DEG C, add DINP, PES, modification TiB2 that step (1) obtains, be warming up to 90 DEG C to stir 3 hours, organic tin catalyzer is added after being cooled to 45 DEG C, stir 40 minutes, obtain single-component polyurethane adhesive.
After tested, water tolerance and the thermotolerance of embodiment 1-6 and comparative example are as shown in the table, wherein,
The Chinese patent of comparative example to be publication number be CN102585754B;
Water tolerance characterizes at the rate of body weight gain before and after boiling water boiling 3 hours by measuring each sizing agent, and rate of body weight gain is less, and water tolerance is better, rate of body weight gain=(boil rear weight-boil front weight)/boil front weight × 100%;
Thermotolerance adopts thermogravimetric analyzer to test the heat decomposition temperature of each sizing agent, and test condition is nitrogen protection, and temperature rise rate is 10 DEG C/min, and Range of measuring temp is 50-500 DEG C:
As seen from the above table, the rate of body weight gain of embodiment of the present invention 1-6 is starkly lower than comparative example, and heat decomposition temperature is then apparently higher than comparative example, and water tolerance and thermotolerance are all better.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (10)
1. a single-component polyurethane adhesive, it is characterized in that: its component and parts by weight are: polyvalent alcohol 40 ~ 60 parts, isocyanic ester 20 ~ 25 parts, chainextender 0.1 ~ 0.6 part, 9 ~ 12 parts, softening agent, catalyzer 0.01 ~ 0.1 part, solvent 10 ~ 15 parts, tackifier 8 ~ 10 parts, linking agent 1 ~ 2 part, TiB2 6 ~ 8 parts, PES9 ~ 10 part.
2. a kind of single-component polyurethane adhesive according to claim 1, is characterized in that: described polyvalent alcohol is vegetable oil polyol.
3. a kind of single-component polyurethane adhesive according to claim 1, is characterized in that: described isocyanic ester is MDI.
4. a kind of single-component polyurethane adhesive according to claim 1, is characterized in that: described chainextender is trolamine.
5. a kind of single-component polyurethane adhesive according to claim 1, is characterized in that: described softening agent is DIDP or DINP.
6. a kind of single-component polyurethane adhesive according to claim 1, is characterized in that: described catalyzer is organic tin catalyzer.
7. a kind of single-component polyurethane adhesive according to claim 1, is characterized in that: described solvent is hydrochloric ether.
8. a kind of single-component polyurethane adhesive according to claim 1, is characterized in that: described tackifier are ester gum.
9. a kind of single-component polyurethane adhesive according to claim 1, is characterized in that: described linking agent is TriMethylolPropane(TMP).
10. the preparation method of a kind of single-component polyurethane adhesive according to claim 1 ~ 9 any one, is characterized in that: its step is as follows:
(1) silane coupling agent is added deionized water for stirring evenly obtained concentration be the coupling agent solution of 12%, ph value is regulated to be add TiB2 powder after 3.2 with hydrochloric acid, the weight ratio of silane coupling agent and TiB2 powder is 1:24, put into ultrasonic cleaner ultrasonic disperse 30 minutes, centrifugation after staticly settling 10 hours, be dried to constant weight at throw out being washed latter 90 DEG C, obtain modification TiB2 after grinding for subsequent use;
(2) polyvalent alcohol, isocyanic ester are added stirring tank, stirring reaction 3 hours at 85 DEG C, add chainextender and continue stirring 1 hour, obtain performed polymer;
(3) performed polymer step (2) obtained, solvent, tackifier, linking agent are uniformly mixed 20 minutes, stirring is continued 20 minutes after being warming up to 45 DEG C, add softening agent, modification TiB2 that PES, step (1) obtain, be warming up to 90 DEG C to stir 3 hours, catalyzer is added after being cooled to 45 DEG C, stir 40 minutes, obtain single-component polyurethane adhesive.
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| CN107083227A (en) * | 2017-04-10 | 2017-08-22 | 长春工业大学 | A kind of single-component polyurethane adhesive and preparation method thereof |
| CN107446522A (en) * | 2017-09-15 | 2017-12-08 | 和鸿电气股份有限公司 | A kind of preparation method for the conducting resinl that LED encapsulation is filled with diboride ceramic powder |
| CN109456587A (en) * | 2018-11-14 | 2019-03-12 | 安徽兆拓新能源科技有限公司 | A kind of polyurethane foam plastics applied to solar water heater |
| CN109456588A (en) * | 2018-11-14 | 2019-03-12 | 安徽兆拓新能源科技有限公司 | Solar water heater polyurethane foam plastics and its application |
| CN109485902A (en) * | 2018-11-14 | 2019-03-19 | 安徽兆拓新能源科技有限公司 | A kind of preparation method of solar water heater foamed plastics |
| CN109627747A (en) * | 2018-12-05 | 2019-04-16 | 湖北大学 | A kind of preparation of heat-resisting and antistatic aqueous polyurethane/titanium biboride composite material |
| CN109796921A (en) * | 2019-01-30 | 2019-05-24 | 广东盈通新材料有限公司 | A kind of modified polyurethane adhesive, composite water-proof joint strip including modified polyurethane adhesive and its preparation method and application |
| CN110229643A (en) * | 2019-06-20 | 2019-09-13 | 武汉工程大学 | A kind of preparation method and product of titanium diboride-carbon nano tube-polyurethane electrically and thermally conductive adhesive |
| CN112646529A (en) * | 2020-12-18 | 2021-04-13 | 上海康达化工新材料集团股份有限公司 | High-temperature-resistant single-component solvent-free polyurethane adhesive and preparation method and application thereof |
| CN113583619A (en) * | 2021-08-26 | 2021-11-02 | 深圳市安伯斯科技有限公司 | Environment-friendly polyurethane adhesive and preparation method thereof |
| CN114836161A (en) * | 2022-05-30 | 2022-08-02 | 郑春华 | Preparation process of blending modified polyurethane adhesive |
| CN114891477A (en) * | 2022-06-21 | 2022-08-12 | 台州禾欣高分子新材料有限公司 | High-performance polyurethane adhesive and preparation method thereof |
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| CN107083227A (en) * | 2017-04-10 | 2017-08-22 | 长春工业大学 | A kind of single-component polyurethane adhesive and preparation method thereof |
| CN107446522A (en) * | 2017-09-15 | 2017-12-08 | 和鸿电气股份有限公司 | A kind of preparation method for the conducting resinl that LED encapsulation is filled with diboride ceramic powder |
| CN109456587A (en) * | 2018-11-14 | 2019-03-12 | 安徽兆拓新能源科技有限公司 | A kind of polyurethane foam plastics applied to solar water heater |
| CN109456588A (en) * | 2018-11-14 | 2019-03-12 | 安徽兆拓新能源科技有限公司 | Solar water heater polyurethane foam plastics and its application |
| CN109485902A (en) * | 2018-11-14 | 2019-03-19 | 安徽兆拓新能源科技有限公司 | A kind of preparation method of solar water heater foamed plastics |
| CN109627747A (en) * | 2018-12-05 | 2019-04-16 | 湖北大学 | A kind of preparation of heat-resisting and antistatic aqueous polyurethane/titanium biboride composite material |
| CN109796921A (en) * | 2019-01-30 | 2019-05-24 | 广东盈通新材料有限公司 | A kind of modified polyurethane adhesive, composite water-proof joint strip including modified polyurethane adhesive and its preparation method and application |
| CN109796921B (en) * | 2019-01-30 | 2021-03-26 | 广东盈通新材料有限公司 | Modified polyurethane adhesive, composite waterproof strip comprising modified polyurethane adhesive, and preparation method and application of composite waterproof strip |
| CN110229643A (en) * | 2019-06-20 | 2019-09-13 | 武汉工程大学 | A kind of preparation method and product of titanium diboride-carbon nano tube-polyurethane electrically and thermally conductive adhesive |
| CN110229643B (en) * | 2019-06-20 | 2021-09-28 | 武汉工程大学 | Preparation method of titanium diboride-carbon nanotube-polyurethane conductive heat-conducting adhesive and product |
| CN112646529A (en) * | 2020-12-18 | 2021-04-13 | 上海康达化工新材料集团股份有限公司 | High-temperature-resistant single-component solvent-free polyurethane adhesive and preparation method and application thereof |
| CN113583619A (en) * | 2021-08-26 | 2021-11-02 | 深圳市安伯斯科技有限公司 | Environment-friendly polyurethane adhesive and preparation method thereof |
| CN114836161A (en) * | 2022-05-30 | 2022-08-02 | 郑春华 | Preparation process of blending modified polyurethane adhesive |
| CN114891477A (en) * | 2022-06-21 | 2022-08-12 | 台州禾欣高分子新材料有限公司 | High-performance polyurethane adhesive and preparation method thereof |
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