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One-component polyurethane adhesive with normal temperature rapid solidification and preparation method thereof

A polyurethane adhesive and fast curing technology, applied in the field of polyurethane adhesives, can solve the problems that the product no longer has use value, gel, etc., and achieves good roller coating stability, high bonding strength, and fast curing rate. Effect

Inactive Publication Date: 2017-07-25
佛山市顺德区巴德富实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The synthesis of polyurethane adhesive is a gradual polymerization process. Under a certain monomer ratio, the molecular weight and viscosity of polyurethane are related to the monomer conversion rate, that is, the greater the degree of polymerization, the greater the molecular weight and viscosity; when the reaction system When the functionality of some monomers is greater than 2, gradual network polymerization will occur, and the increase rate of molecular weight and viscosity will be faster, but gelation will occur when the conversion rate of monomers reaches a certain value, and the product after gelation will no longer Useful

Method used

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  • One-component polyurethane adhesive with normal temperature rapid solidification and preparation method thereof
  • One-component polyurethane adhesive with normal temperature rapid solidification and preparation method thereof
  • One-component polyurethane adhesive with normal temperature rapid solidification and preparation method thereof

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preparation example Construction

[0050] In addition, the present invention provides a method for preparing a one-component polyurethane adhesive, which specifically includes the following steps,

[0051] 1) Heat polyol A, polyol B and additives to 100°C to 150°C, and vacuum to remove moisture;

[0052] 2) Control the temperature of polyol A, polyol B and additives after vacuuming at 80°C to 120°C, add isocyanate A and part of isocyanate B, control the temperature at 100°C to 130°C, react and stir for 0.5h to 3h;

[0053] 3) Add the remaining isocyanate B, control the temperature at 100°C-130°C, react and stir for 0-30min;

[0054] 4) Add the catalyst and continue to stir for 10 minutes to obtain the polyurethane adhesive.

[0055] Or, adopt a kind of preparation method of one-component polyurethane adhesive, specifically comprise the following steps,

[0056] 1) Heat polyol A, polyol B and additives to 100°C to 150°C, and vacuum to remove moisture;

[0057] 2) Control the temperature of polyol A, polyol B...

Embodiment 1

[0060] A kind of one-component polyurethane adhesive that solidifies rapidly at room temperature, by mass parts, comprises following formulation components, 20 parts of polypropylene glycol (Mw=2000), 20 parts of ternary polypropylene glycol (Mw=1500), antioxidant 0.3 parts, 0.1 parts of anti-ultraviolet absorbing agent, 0.2 parts of leveling agent, 60 parts of 4,4'-diphenylmethane diisocyanate, 0 parts of isocyanate B, 0.02 parts of T-12.

[0061] The preparation method of the above-mentioned one-component polyurethane adhesive fast curing at room temperature comprises the following steps, polypropylene glycol (Mw=2000), terpolymer (Mw=1500), antioxidant, anti-ultraviolet absorber, leveling Mix the reagents, heat to 110°C, and remove the moisture by vacuuming; add 4,4'-diphenylmethane diisocyanate, control the temperature at 120°C, and react for 120 minutes; add T-12, and continue stirring for 10 minutes to obtain Adhesive A.

[0062] Adhesive A is a one-component room temper...

Embodiment 2

[0064] A one-component polyurethane adhesive that cures rapidly at room temperature, in parts by mass, includes the following formulation components, 36 parts of polypropylene oxide diol (Mw=4000), ternary polypropylene oxide (Mw=1500) 30 parts, 0.3 parts of antioxidant, 0.1 part of anti-ultraviolet absorber, 0.2 parts of leveling agent, 33.38 parts of 4,4'-diphenylmethane diisocyanate, 0.02 parts of T-12.

[0065] The preparation method of the above-mentioned single-component polyurethane adhesive fast curing at room temperature comprises the following steps, polypropylene oxide diol (Mw=4000), ternary polypropylene oxide (Mw=1500), antioxidant, anti-oxidant Mix UV absorber and leveling agent, heat to 110°C, vacuumize to remove moisture; add 4,4'-diphenylmethane diisocyanate, control the temperature at 120°C, react for 120min; add T-12, continue stirring for 10min to get Adhesive B.

[0066] Adhesive B is a one-component room temperature fast-curing polyurethane adhesive.

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Abstract

The invention discloses a one-component polyurethane adhesive with normal temperature rapid solidification and a preparation method thereof, and belongs to the technical field of polyurethane adhesives. The adhesive comprises the following formula components in parts by mass: 20-50 parts of polyol A, 5-30 parts of polyol B, 0-60 parts of isocyanate A, 0-60 parts of isocyanate B, 0.01-1 part of a catalyst, and 0.1-3 parts of an auxiliary agent; the usage amounts of isocyanate A and isocyanate B are not zero at the same time; the viscosity of the adhesive at a normal temperature is 3000-30000mPa.s, and the content of NCO group is 7-25%. Polyol whose functionality is 3 is used, so that average functionality of the adhesive is higher than 2; during solidification, net crosslinking is generated, the solidification rate is faster, the bonding strength is higher, and solidification time is further shortened by using an activator; the product has the characteristics of low viscosity at a normal temperature, good stability of roller coating, and the like.

Description

technical field [0001] The invention relates to a polyurethane adhesive, in particular to a one-component polyurethane adhesive that is rapidly cured at room temperature and a preparation method thereof, belonging to the technical field of polyurethane adhesives. Background technique [0002] In recent years, with the improvement of people's awareness of environmental protection, the preparation and application of adhesives are becoming more and more water-based and solvent-free, and solvent-free adhesives are more economical. There are two types of solvent-free polyurethane adhesives: two-component and one-component. One-component polyurethane adhesives are more convenient to prepare and use than two-component polyurethane adhesives, and one-component liquid polyurethane adhesives are more convenient to use than one-component polyurethane hot melt adhesives. [0003] The synthesis of polyurethane adhesive is a gradual polymerization process. Under a certain monomer ratio, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C09J175/08C08G18/42C08G18/48C08G18/75C08G18/76C08G18/79
CPCC09J175/06C08G18/4018C08G18/4238C08G18/4812C08G18/4825C08G18/4829C08G18/4854C08G18/725C08G18/758C08G18/7671C08G18/79C09J175/08
Inventor 陈旨进罗红兵皮鹏李庆喜
Owner 佛山市顺德区巴德富实业有限公司
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