CN113861927A - Moisture-curing polyurethane hot melt adhesive with high initial adhesion strength and high bonding fastness and preparation method thereof - Google Patents
Moisture-curing polyurethane hot melt adhesive with high initial adhesion strength and high bonding fastness and preparation method thereof Download PDFInfo
- Publication number
- CN113861927A CN113861927A CN202111227469.5A CN202111227469A CN113861927A CN 113861927 A CN113861927 A CN 113861927A CN 202111227469 A CN202111227469 A CN 202111227469A CN 113861927 A CN113861927 A CN 113861927A
- Authority
- CN
- China
- Prior art keywords
- parts
- hot melt
- melt adhesive
- polyester polyol
- moisture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- 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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
Abstract
The invention discloses a moisture-curing polyurethane hot melt adhesive with high initial adhesion strength and high bonding fastness and a preparation method thereof, and particularly relates to the field of preparation of hot melt adhesives. The hot melt adhesive comprises 50-70 parts of polyester polyol; 5-10 parts of dihydroxy polybutadiene; 15-30 parts of polyisocyanate; 0-20 parts of tackifying resin; 0-0.5 part of catalyst; 0-1.0 part of antioxidant; 0-1.0 part of yellowing resistant agent. The preparation method comprises material selection, two-step reaction kettle reaction and packaging. The moisture-curing polyurethane hot melt adhesive prepared by the method is particularly suitable for TPU film composite fabrics; the hot melt adhesive can be used for preparing a composite fabric by a roll-coating point-like gluing method, and has excellent initial adhesion strength and bonding fastness; the hot melt adhesive prepared by the method can keep very soft hand feeling after being used for curing the TPU film composite fabric, and the compounded fabric is durable. The hot melt adhesive prepared by the method has high product quality and low production cost, and can well meet the increasing requirements of domestic markets for the moisture-curing polyurethane hot melt adhesive for bonding composite fabrics.
Description
Technical Field
The invention relates to the field of preparation of hot melt adhesives, and particularly relates to a moisture-curable polyurethane hot melt adhesive with high initial adhesion strength and high bonding fastness and a preparation method thereof.
Background
Despite the recent development of the adhesive industry, the reactive polyurethane hot melt adhesive is one of the fastest growing adhesive varieties. This is not only due to their excellent properties, but also because such hot melt adhesives can provide the user with excellent environmental friendliness. The adhesive strength of the reactive polyurethane hot melt adhesive is different from that of the common hot melt adhesive, the reactive polyurethane hot melt adhesive contains isocyanate-terminated (NCO) polyurethane prepolymer, and the isocyanate-terminated (NCO) polyurethane prepolymer can react with moisture or active hydrogen substances in the air or on an adherend to form a partially crosslinked reticular structure, so that the adhesive strength, chemical resistance, heat resistance, hydrolysis resistance and other properties of the reactive polyurethane hot melt adhesive are superior to those of the common hot melt adhesive. Meanwhile, the polyurethane adhesive has the thermoplastic cold setting property of common hot melt adhesive, is simple and convenient to bond, and has the characteristics of wide range of adherends, large performance adjustability, good surface compatibility on paint surfaces and the like, and the like. 100 percent of solid content, no solvent and environmental protection. These have led to the widespread use of these hot melt adhesives in various applications, such as the automotive industry, the footwear industry, textiles, the wood industry, the electronics industry, book binding, and the like.
The TPU film is prepared by processes of calendering, tape casting, film blowing, coating and the like on the basis of thermoplastic polyurethane TPU elastomer particles, and has the excellent characteristics of high tension, high tensile force, toughness, aging resistance, water resistance and moisture permeability. The TPU film can be compounded with various fabrics such as knitted fabrics, canyon, towel cloth, jean, taslon, polar fleece, velvet, lycra cloth and the like by a roll-coating point-shaped gluing method, and the prepared composite fabric integrates the functions of water resistance, moisture permeability, ventilation, wind resistance, warmth retention, antibiosis, dryness, durability, comfortable and soft wearing and the like, and is widely applied to various sportswear, jackets, windcheaters, cold protective clothing, ski suits, military clothing, isolation suits and the like in the fields of sports, spaceflight, medical treatment, fire control and the like. Moisture-curing polyurethane hot melt adhesives (HMPUR) are the most ideal adhesive in the field, because the two adhesives are polyurethane, the chemical structures are very close, the compatibility and adherence are better in chemical properties, strong attraction is easier to form, and higher initial adhesion strength and higher adhesion fastness are brought to bonding. However, at present, the product is basically monopolized by foreign brands, and although some domestic manufacturers break the technical monopoly and push out the moisture-curing polyurethane hot melt adhesive (HMPUR) in recent years, the initial adhesion strength and the bonding fastness of the product cannot be compared with those of imported products, and the product cannot be applied to high-grade branded fabrics with higher requirements.
Disclosure of Invention
Therefore, the invention provides a moisture-curing polyurethane hot melt adhesive with high initial adhesion strength and high bonding fastness and a preparation method thereof, and aims to solve the problems that the existing domestic product is low in quality, high in cost, incapable of meeting the requirements of domestic markets and the like.
In order to achieve the above purpose, the invention provides the following technical scheme:
according to one aspect of the invention, the moisture-curing polyurethane hot melt adhesive with high initial adhesion strength and high bonding fastness comprises the following components in parts by weight: 50-70 parts of polyester polyol; 5-10 parts of dihydroxy polybutadiene; 15-30 parts of polyisocyanate; 0-20 parts of tackifying resin; 0-0.5 part of catalyst; 0-1.0 part of antioxidant; 0-1.0 part of yellowing resistant agent.
Further, the polyester polyol includes amorphous polyester polyol, liquid polyester polyol and crystalline polyester polyol.
Further, the amorphous polyester polyol comprises a reaction product of neopentyl glycol and/or hexanediol with phthalic acid or phthalic anhydride; the content of the amorphous polyester polyol accounts for 5-25% of the total amount of the polyol.
Preferably, the content of the amorphous polyester polyol is 10 to 20% of the total amount of the polyol.
Further, the liquid polyester polyol comprises a reaction product of one or more of neopentyl glycol, hexanediol and butanediol and one or more of adipic acid, phthalic acid, terephthalic acid and isophthalic acid, and the viscosity of the liquid polyester polyol is more than 10000cps at 80 ℃; the content of the liquid polyester polyol accounts for 20-70% of the total amount of the polyol.
Preferably, the content of the liquid polyester polyol is 40-50% of the total amount of the polyol.
Further, the crystalline polyester polyol comprises a reaction product of one or more of ethylene glycol, hexanediol and butanediol and one or more of adipic acid, sebacic acid and terephthalic acid; the melting point of the crystalline polyester polyol is 40-120 ℃; the content of the crystalline polyester polyol accounts for 10-40% of the total amount of the polyol.
Preferably, the content of the crystalline polyester polyol is 20 to 30% of the total amount of the polyol.
Further, the hydroxyl value of the dihydroxy polybutadiene is 20-50 mgKOH/g; the viscosity is 3-10Pa.s at 40 ℃.
Preferably, the hydroxyl value of the dihydroxy polybutadiene is 30-40 mgKOH/g; the viscosity is 6-8Pa.s at 40 ℃.
Further, the polyisocyanate component is dimer acid diisocyanate.
Further, the tackifying resin is one or more of natural resin, petroleum resin or thermoplastic elastomer, and the natural resin comprises rosin resin, terpene resin and terpene phenolic resin; the thermoplastic elastomer comprises EVA, EAA, acrylic resin and thermoplastic polyurethane elastomer TPU; the tackifying resin has a melting point of less than 70 ℃.
Preferably, the tackifying resin is selected from thermoplastic polyurethane elastomers TPU of a similar structure of dihydroxy-terminated polybutadiene and dimer acid diisocyanate (DDI) components.
Preferably, the tackifying resin has a melting point of less than 65 ℃.
Further, the catalyst is one or more of lead, tin and zinc octoate; the antioxidant is any one of 2, 6-di-tert-butyl-p-cresol, antioxidant 1010 or antioxidant 1076; the yellowing resistant agent is any one of 2-hydroxy-4-methylbenzophenone, 2- (2 '-hydroxy-3', 5 '-di-tert-butyl) phenyl-5-chlorobenzotriazole, 2- (2' -hydroxy-3 ', 5-di-tert-amyl) phenylbenzotriazole, 2- (2' -hydroxy-3 ', 5' -di-tert-octyl) phenylbenzotriazole or 2-hydroxy-4-n-octoxy benzophenone.
According to another aspect of the present invention, there is provided a method for preparing the above moisture-curable polyurethane hot melt adhesive with high initial adhesion strength and high bonding fastness, the method comprising the steps of:
step one, selecting polyester polyol in parts by weight: 50-70 parts; hydroxyl-terminated polybutadiene: 5-10 parts; polyisocyanate: 15-30 parts; tackifying resin: 0-20 parts of a solvent; catalyst: 0-0.5 part; antioxidant: 0-1.0 part; anti-yellowing agent: 0-1.0 part of raw materials;
adding 50-70 parts of polyester polyol, 5-10 parts of dihydroxy polybutadiene, 0-20 parts of tackifying resin, 0-1.0 part of antioxidant and 0-1.0 part of yellowing resistant agent into a reaction kettle, and dehydrating for 2-3 h at the temperature of 115-120 ℃ and the vacuum degree of less than or equal to 0.095 MPa;
step three, when the mixture in the step two is cooled to 78-82 ℃, adding 15-30 parts of selected polyisocyanate and 0-0.5 part of catalyst into a reaction kettle for uniformly mixing, and reacting for 3 hours at 80-85 ℃ under the vacuum degree of less than or equal to 0.095 MPa;
and step four, the reactant obtained in the step three enters a packaging bag under the protection of nitrogen for packaging, and the moisture-curing polyurethane hot melt adhesive with high initial adhesion strength and high bonding fastness is obtained.
The invention has the following advantages:
1. the moisture-curing polyurethane hot melt adhesive prepared by the method is particularly suitable for TPU film composite fabrics; the hot melt adhesive can be used for preparing a composite fabric by a roll-coating point-like gluing method, and has excellent initial adhesion strength and bonding fastness;
2. the hot melt adhesive prepared by the method can keep very soft hand feeling after being used for curing the TPU film composite fabric, and the compounded fabric is durable.
3. The hot melt adhesive prepared by the method has high product quality and low production cost, and can well meet the increasing requirements of domestic markets for the moisture-curing polyurethane hot melt adhesive for bonding composite fabrics.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The preparation and treatment methods used in the following examples are conventional methods unless otherwise specified.
The starting materials used in the following examples are commercially available unless otherwise specified.
The measurement method of each index in the following examples is as follows:
initial adhesion strength: according to the standard of GBT 528-one 2009 determination of tensile stress strain performance of vulcanized rubber or thermoplastic rubber, after a sample is placed indoors for one hour, a universal testing machine is used for determining the shear strength, the bonded base material is a stainless steel sheet, the temperature is 20-25 ℃, and the humidity is 50-60%;
opening time: according to GBT13477.5-2002, part 5 of the building sealant test method __: determination of tack free time standard, a 0.1mm film of glue is applied to a smooth plate using an applicator and the time from application of the glue layer to lack of tack is recorded.
Washing fastness: composite fabric and cloth prepared by roll coating point-like gluing methodAdopts the kasugao fabric, the glue melting temperature is 85 ℃, and the glue coating amount is 10g/m2And after curing for 7 days under the conditions of the air temperature of 25 ℃ and the humidity of 75%, evaluating the bonding fastness of the moisture-curing polyurethane hot melt adhesive by comparing the waterproof performance of the composite fabric before and after five times of water washing at 40 ℃ according to the standards of GB/T8629-.
The polyester polyol P-5 is high-viscosity liquid polyester polyol produced by Qingdao Xinyu chemical company Limited;
the polyester polyol 356T is a crystalline polyester polyol produced by Qingdao Xinyu chemical Co.Ltd;
the polyester polyol Dynacoll7130 is amorphous polyether polyol produced by Yingchuang Texaco;
the polyester polyol 224 is high-viscosity liquid polyester polyol produced by a Yao in Taizhou polyurethane plastic product factory;
the polyester polyol P-153 is amorphous polyester polyol produced by Yao Tazhou polyurethane plastic product factories;
the polyester polyol P-40 is high-viscosity liquid polyester polyol produced by Tazhou Yao polyurethane plastic product factories;
the polyester polyol CMA-2066 is a crystalline polyester polyol produced by Wanhua chemical group GmbH;
the polyester polyol CMA-66 is a crystalline polyester polyol produced by Wanhua chemical group GmbH;
the thermoplastic polyurethane elastomer TPU is self-made and is prepared by selecting polyester polyol P-40, polyester polyol CMA-66, polyester polyol P-153, dihydroxy polybutadiene and dimer acid diisocyanate, and the melt index is as follows: 30-50g/10min, melt viscosity (130 ℃): 2000-3000Pa.s, melting point: at 60 ℃.
Example 1 moisture-curing polyurethane Hot melt adhesive with high initial adhesion Strength and high adhesion Strength and preparation method thereof
Selecting polyester polyol P-40 in parts by weight: 29 parts; polyester polyol CMA-66: 20 parts, polyester polyol P-153: 12 parts of (1); hydroxyl-terminated polybutadiene: 9 parts of (1); dimer acid diisocyanate: 20 parts of (1); thermoplastic polyurethane elastomer TPU: 10 parts of (A); zinc octoate: 0.1 part; antioxidant 1010: 0.2 part; 2- (2 '-hydroxy-3', 5-di-tert-amyl) phenylbenzotriazole: 0.2 part of the raw material;
secondly, adding 61 parts of selected polyester polyol, 9 parts of dihydroxy polybutadiene, 10 parts of thermoplastic polyurethane elastomer TPU, 0.2 part of antioxidant 1010 and 0.2 part of 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-octyl) phenyl benzotriazole into a reaction kettle, and dehydrating for 2 to 3 hours at the temperature of 120 ℃ and the vacuum degree of less than or equal to 0.095 MPa;
thirdly, when the mixture in the second step is cooled to 80 ℃, adding 20 parts of selected dimer acid diisocyanate and 0.1 part of zinc octoate into a reaction kettle for uniform mixing, and reacting for 3 hours at 85 ℃ and under the vacuum degree of less than or equal to 0.095 MPa;
fourthly, the reactant of the third step enters a packaging bag under the protection of nitrogen for packaging to obtain the product.
Example 2 moisture-curing polyurethane Hot melt adhesive with high initial adhesion Strength and high adhesion Strength and preparation method thereof
Selecting polyester polyol 224 in parts by weight: 28 parts of (1); polyester polyol CMA-2066: 20 parts, polyester polyol P-153: 12 parts of (1); hydroxyl-terminated polybutadiene: 10 parts of (A); dimer acid diisocyanate: 20 parts of (1); thermoplastic polyurethane elastomer TPU: 10 parts of (A); zinc octoate: 0.1 part; antioxidant 1010: 0.2 part; 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-butyl) phenyl-5-chlorobenzotriazole: 0.2 part of the raw material;
60 parts of polyester polyol, 10 parts of dihydroxy polybutadiene, 10 parts of thermoplastic polyurethane elastomer TPU, 0.2 part of antioxidant 1010 and 0.2 part of 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-octyl) phenyl benzotriazole are added into a reaction kettle, and dehydration is carried out for 2 to 3 hours at the temperature of 120 ℃ and the vacuum degree of less than or equal to 0.095 MPa;
thirdly, when the mixture in the second step is cooled to 80 ℃, adding 20 parts of selected dimer acid diisocyanate and 0.1 part of zinc octoate into a reaction kettle for uniform mixing, and reacting for 3 hours at 85 ℃ and under the vacuum degree of less than or equal to 0.095 MPa;
fourthly, the reactant of the third step enters a packaging bag under the protection of nitrogen for packaging to obtain the product.
Example 3 moisture-curing polyurethane Hot melt adhesive with high initial adhesion Strength and high adhesion Strength and preparation method thereof
Selecting polyester polyol P-5 in parts by weight: 30 parts of (1); polyester polyol 356T: 18 parts, polyester polyol Dynacoll 7130: 12 parts of (1); hydroxyl-terminated polybutadiene: 10 parts of (A); dimer acid diisocyanate: 20 parts of (1); thermoplastic polyurethane elastomer TPU: 10 parts of (A); zinc octoate: 0.1 part; antioxidant 1076: 0.2 part; 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-octyl) phenylbenzotriazole: 0.2 part of the raw material;
secondly, adding 60 parts of selected polyester polyol, 10 parts of dihydroxy polybutadiene, 10 parts of thermoplastic polyurethane elastomer TPU, 0.2 part of antioxidant 1076 and 0.2 part of 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-octyl) phenyl benzotriazole into a reaction kettle, and dehydrating for 2 to 3 hours at the temperature of 120 ℃ and the vacuum degree of less than or equal to 0.095 MPa;
thirdly, when the mixture in the second step is cooled to 80 ℃, adding 20 parts of selected dimer acid diisocyanate and 0.1 part of zinc octoate into a reaction kettle for uniform mixing, and reacting for 3 hours at 85 ℃ and under the vacuum degree of less than or equal to 0.095 MPa;
fourthly, the reactant of the third step enters a packaging bag under the protection of nitrogen for packaging to obtain the product.
Example 4 moisture-curing polyurethane Hot melt adhesive with high initial adhesion Strength and high adhesion Strength and preparation method thereof
Selecting polyester polyol 224 in parts by weight: 35 parts of (B); polyester polyol CMA-2066: 25 parts, polyester polyol P-153: 10 parts of (A); hydroxyl-terminated polybutadiene: 5 parts of a mixture; dimer acid diisocyanate: 20 parts of (1); thermoplastic polyurethane elastomer TPU: 5 parts of a mixture; zinc octoate: 0.1 part; antioxidant 1010: 0.2 part; 2-hydroxy-4-n-octoxy benzophenone: 0.2 part of the raw material;
adding 70 parts of selected polyester polyol, 5 parts of dihydroxy polybutadiene, 5 parts of thermoplastic polyurethane elastomer TPU, 0.2 part of antioxidant 1010 and 0.2 part of 2-hydroxy-4-n-octoxy benzophenone into a reaction kettle, and dehydrating for 2 to 3 hours at the temperature of 120 ℃ and the vacuum degree of less than or equal to 0.095 MPa;
thirdly, when the mixture in the second step is cooled to 80 ℃, adding 20 parts of selected dimer acid diisocyanate and 0.1 part of zinc octoate into a reaction kettle for uniform mixing, and reacting for 3 hours at 85 ℃ and under the vacuum degree of less than or equal to 0.095 MPa;
fourthly, the reactant of the third step enters a packaging bag under the protection of nitrogen for packaging to obtain the product.
Example 5 moisture-curing polyurethane Hot melt adhesive with high initial tack Strength and high adhesion Strength and preparation method thereof
Selecting polyester polyol P-5 in parts by weight: 40 parts of a mixture; polyester polyol 356T: 20 parts, polyester polyol Dynacoll 7130: 10 parts of (A); hydroxyl-terminated polybutadiene: 5 parts of a mixture; dimer acid diisocyanate: 20 parts of (1); thermoplastic polyurethane elastomer TPU: 5 parts of a mixture; zinc octoate: 0.1 part; antioxidant 1010: 0.2 part; 2-hydroxy-4-methylbenzophenone: 0.2 part of the raw material;
secondly, adding 70 parts of selected polyester polyol, 5 parts of dihydroxy polybutadiene, 5 parts of thermoplastic polyurethane elastomer TPU, 0.2 part of antioxidant 1010 and 0.2 part of 2-hydroxy-4-methylbenzophenone into a reaction kettle, and dehydrating for 2 to 3 hours at the temperature of 120 ℃ and the vacuum degree of less than or equal to 0.095 MPa;
thirdly, when the mixture in the second step is cooled to 80 ℃, adding 20 parts of selected dimer acid diisocyanate and 0.1 part of zinc octoate into a reaction kettle for uniform mixing, and reacting for 3 hours at 85 ℃ and under the vacuum degree of less than or equal to 0.095 MPa;
fourthly, the reactant of the third step enters a packaging bag under the protection of nitrogen for packaging to obtain the product.
Example 6A moisture-curing polyurethane Hot melt adhesive with high initial tack Strength and high adhesion Strength and preparation method thereof
Selecting polyester polyol P-40 in parts by weight: 29 parts; polyester polyol CMA-66: 22 parts, polyester polyol P-153: 10 parts of (A); hydroxyl-terminated polybutadiene: 9 parts of (1); dimer acid diisocyanate: 20 parts of (1); c9 petroleum resin: 10 parts of (A); zinc octoate: 0.1 part; antioxidant 1010: 0.2 part; 2-hydroxy-4-methylbenzophenone: 0.2 part of the raw material;
secondly, adding 61 parts of selected polyester polyol, 9 parts of dihydroxy polybutadiene, 10 parts of C9 petroleum resin, 0.2 part of antioxidant 1010 and 0.2 part of 2-hydroxy-4-methylbenzophenone into a reaction kettle, and dehydrating for 2 to 3 hours at the temperature of 120 ℃ and the vacuum degree of less than or equal to 0.095 MPa;
thirdly, when the mixture in the second step is cooled to 80 ℃, adding 20 parts of selected dimer acid diisocyanate and 0.1 part of zinc octoate into a reaction kettle for uniform mixing, and reacting for 3 hours at 85 ℃ and under the vacuum degree of less than or equal to 0.095 MPa;
fourthly, the reactant of the third step enters a packaging bag under the protection of nitrogen for packaging to obtain the product.
Test example
Comparative samples were selected for TECHNOMET PUR 7511, high in Han Germany, and JQ7320, Bailijia, Guangzhou.
TABLE 1 EXAMPLES 1-5 AND COMPARATIVE SAMPLE TEST RESULTS TABLE
From experimental test results, the initial adhesive strength of the synthesized moisture-curing polyurethane hot melt adhesive is superior to that of TECHNOMET PUR 7511 in Hangao, Germany and JQ7320 in Bailixa, Guangzhou, the bonding fastness and the hand feeling are better than those of JQ7320, and the initial adhesive strength is comparable to that of TECHNOMETT PUR 7511.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. The moisture-curing polyurethane hot melt adhesive is characterized by comprising the following components in parts by weight: 50-70 parts of polyester polyol; 5-10 parts of dihydroxy polybutadiene; 15-30 parts of polyisocyanate; 0-20 parts of tackifying resin; 0-0.5 part of catalyst; 0-1.0 part of antioxidant; 0-1.0 part of yellowing resistant agent.
2. The moisture-curable polyurethane hot melt adhesive having high initial adhesion strength and high bonding strength according to claim 1, wherein the polyester polyol comprises amorphous polyester polyol, liquid polyester polyol and crystalline polyester polyol.
3. The moisture-curable polyurethane hot melt adhesive having high initial adhesion strength and high bonding fastness according to claim 2, wherein said amorphous polyester polyol comprises a reaction product of neopentyl glycol and/or hexanediol with phthalic acid or phthalic anhydride; the content of the amorphous polyester polyol accounts for 5-25% of the total amount of the polyol.
4. The moisture-curable polyurethane hot melt adhesive with high initial adhesion strength and high bonding fastness according to claim 2, wherein the liquid polyester polyol comprises a reaction product of one or more diols selected from neopentyl glycol, hexanediol and butanediol with one or more diacids selected from adipic acid, phthalic acid, terephthalic acid and isophthalic acid, and the viscosity of the liquid polyester polyol is more than 10000cps at 80 ℃; the content of the liquid polyester polyol accounts for 20-70% of the total amount of the polyol.
5. The moisture-curable polyurethane hot melt adhesive with high initial adhesion strength and high bonding fastness according to claim 2, wherein the crystalline polyester polyol comprises a reaction product of one or more diols selected from ethylene glycol, hexanediol and butanediol with one or more diacids selected from adipic acid, sebacic acid and terephthalic acid; the melting point of the crystalline polyester polyol is 40-120 ℃; the content of the crystalline polyester polyol accounts for 10-40% of the total amount of the polyol.
6. The moisture-curable polyurethane hot melt adhesive with high initial adhesion strength and high bonding fastness according to claim 1, wherein the hydroxyl value of the dihydroxy-terminated polybutadiene is 20-50 mgKOH/g; the viscosity is 3-10Pa.s at 40 ℃.
7. The moisture-curable polyurethane hot melt adhesive with high initial adhesion strength and high bonding fastness according to claim 1, wherein the polyisocyanate component is dimer acid diisocyanate.
8. The moisture-curable polyurethane hot melt adhesive with high initial adhesion strength and high bonding fastness according to claim 1, wherein the tackifying resin is one or more of natural resins, petroleum resins or thermoplastic elastomers, and the natural resins comprise rosin resins, terpene resins and terpene phenolic resins; the thermoplastic elastomer comprises EVA, EAA, acrylic resin and thermoplastic polyurethane elastomer TPU; the tackifying resin has a melting point of less than 70 ℃.
9. The moisture-curable polyurethane hot melt adhesive with high initial adhesion strength and high bonding fastness according to claim 1, wherein the catalyst is one or more of lead, tin and zinc octoates; the antioxidant is any one of 2, 6-di-tert-butyl-p-cresol, antioxidant 1010 or antioxidant 1076; the yellowing resistant agent is any one of 2-hydroxy-4-methylbenzophenone, 2- (2 '-hydroxy-3', 5 '-di-tert-butyl) phenyl-5-chlorobenzotriazole, 2- (2' -hydroxy-3 ', 5-di-tert-amyl) phenylbenzotriazole, 2- (2' -hydroxy-3 ', 5' -di-tert-octyl) phenylbenzotriazole or 2-hydroxy-4-n-octoxy benzophenone.
10. A process for preparing a moisture-curable polyurethane hot melt adhesive having high initial adhesion strength and high adhesion fastness as claimed in any one of claims 1 to 9, which comprises the steps of:
step one, selecting polyester polyol in parts by weight: 50-70 parts; hydroxyl-terminated polybutadiene: 5-10 parts; polyisocyanate: 15-30 parts; tackifying resin: 0-20 parts of a solvent; catalyst: 0-0.5 part; antioxidant: 0-1.0 part; anti-yellowing agent: 0-1.0 part of raw materials;
adding 50-70 parts of polyester polyol, 5-10 parts of dihydroxy polybutadiene, 0-20 parts of tackifying resin, 0-1.0 part of antioxidant and 0-1.0 part of yellowing resistant agent into a reaction kettle, and dehydrating for 2-3 h at the temperature of 115-120 ℃ and the vacuum degree of less than or equal to 0.095 MPa;
step three, when the mixture in the step two is cooled to 78-82 ℃, adding 15-30 parts of selected polyisocyanate and 0-0.5 part of catalyst into a reaction kettle for uniformly mixing, and reacting for 3 hours at 80-85 ℃ under the vacuum degree of less than or equal to 0.095 MPa;
and step four, the reactant obtained in the step three enters a packaging bag under the protection of nitrogen for packaging, and the moisture-curing polyurethane hot melt adhesive with high initial adhesion strength and high bonding fastness is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111227469.5A CN113861927B (en) | 2021-10-21 | 2021-10-21 | Moisture-cured polyurethane hot melt adhesive with high initial adhesion strength and high adhesion fastness and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111227469.5A CN113861927B (en) | 2021-10-21 | 2021-10-21 | Moisture-cured polyurethane hot melt adhesive with high initial adhesion strength and high adhesion fastness and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113861927A true CN113861927A (en) | 2021-12-31 |
| CN113861927B CN113861927B (en) | 2023-09-26 |
Family
ID=78996945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111227469.5A Active CN113861927B (en) | 2021-10-21 | 2021-10-21 | Moisture-cured polyurethane hot melt adhesive with high initial adhesion strength and high adhesion fastness and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113861927B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115806770A (en) * | 2022-12-22 | 2023-03-17 | 佛山市科顺建筑材料有限公司 | Double-component waterproof coating, preparation method thereof and building waterproof structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112708101A (en) * | 2020-12-24 | 2021-04-27 | 辽宁恒星精细化工有限公司 | Preparation method of thermoplastic polyurethane elastomer for reactive hot melt adhesive |
| CN113046014A (en) * | 2021-03-22 | 2021-06-29 | 杭州之江新材料有限公司 | Low-viscosity high-initial-viscosity polyurethane hot melt adhesive and preparation method thereof |
-
2021
- 2021-10-21 CN CN202111227469.5A patent/CN113861927B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112708101A (en) * | 2020-12-24 | 2021-04-27 | 辽宁恒星精细化工有限公司 | Preparation method of thermoplastic polyurethane elastomer for reactive hot melt adhesive |
| CN113046014A (en) * | 2021-03-22 | 2021-06-29 | 杭州之江新材料有限公司 | Low-viscosity high-initial-viscosity polyurethane hot melt adhesive and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 李子东等: "《胶黏剂助剂》", 30 June 2009, 化学工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115806770A (en) * | 2022-12-22 | 2023-03-17 | 佛山市科顺建筑材料有限公司 | Double-component waterproof coating, preparation method thereof and building waterproof structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113861927B (en) | 2023-09-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101179003B1 (en) | Moisture curable polyurethane hot melt adhesive composition | |
| US11629277B2 (en) | Moisture curable polyurethane adhesive composition | |
| CN102618202A (en) | Water-based polyurethane composite adhesive for tanning and preparation method and application of composite adhesive | |
| JP5532224B2 (en) | Urethane prepolymer | |
| WO2009086064A1 (en) | Method for preparing a moisture curable hot melt adhesive | |
| CN111902443B (en) | Polyurethane prepolymer, adhesive and synthetic artificial leather | |
| KR101326737B1 (en) | Thermoplastic polyurethane resin and film for protect layer with superiority flexibility and strong heat resistance, lamination layer film manufacturing method and lamination layer film using its resin and film | |
| CN112322248A (en) | PUR hot melt adhesive for composite board and preparation method thereof | |
| CN113861927A (en) | Moisture-curing polyurethane hot melt adhesive with high initial adhesion strength and high bonding fastness and preparation method thereof | |
| KR101972774B1 (en) | Reactive polyurethane hotmelt adhesives having the non-swelling property and producing method of coating textile using the same | |
| US20220356383A1 (en) | Reactive Hot Melt Adhesive Composition and Use Thereof | |
| KR20130083281A (en) | Excellence di-lamination adhesive, adhesive layer thermoplastic polyurethane resin and excellent burning resistance protect layer thermoplastic polyurethane resin to use this, manufacture the film and method | |
| CN112708101B (en) | Preparation method of thermoplastic polyurethane elastomer for reactive hot melt adhesive | |
| TW201817938A (en) | Hot melt adhesive of moisture cured reactive polyurethane and process for preparing the same and use of the same in fabrics | |
| TW202106841A (en) | Moisture-curable hot-melt adhesive composition, bonded object, and garment | |
| CN108865043B (en) | Double-component strong adhesive and preparation method and application thereof | |
| CN112831018A (en) | Solvent-free synthetic leather polyurethane composite material and preparation method thereof | |
| CN109233732B (en) | Single-component strong adhesive and preparation method and application thereof | |
| CN110885660A (en) | Polyurethane hot melt adhesive for low surface energy material and preparation method thereof | |
| CN109575856B (en) | Polyurethane-pressure-sensitive adhesive composite single-component adhesion promoter | |
| CN110527479B (en) | Hyperbranched thermoplastic polyurethane adhesive and application thereof in fire hose | |
| WO2023139067A1 (en) | Moisture curable polyurethane hot-melt adhesive having improved heat stability | |
| WO2023168622A1 (en) | Moisture curable polyurethane hot-melt adhesive having improved initial strength | |
| WO2023044665A1 (en) | Moisture curable polyurethane hot-melt adhesive having improved heat stability | |
| CN115627149A (en) | Epoxidized hydroxyl-terminated polybutadiene modified moisture-curing polyurethane hot melt adhesive and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |