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Preparation method and application of moisture reaction type polyurethane hot-melt adhesive for composite floor

A polyurethane hot-melt adhesive and moisture-responsive technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve fire and explosion hazards, unsuitable for sustainable development, and solvent environmental pollution and other problems, to achieve the effect of a wide range of applicable substrates, reducing the instability of finished product quality, and simplifying the process

Active Publication Date: 2016-08-03
高鼎精细化工(昆山)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, solvent-based glue is often used for lamination of composite floors. This type of glue is a two-component polyurethane glue. Before use, the glue must be mixed according to the proportion. Fitting, because it contains solvents, the smell of solvents will cause people to feel uncomfortable when using them, and the solvents are flammable and explosive, which is prone to fire and explosion hazards when used, and the use of solvents will cause environmental pollution and safety and health hazards
And the preparation process of this type of glue needs to go through the drying process, the equipment investment is large, and the operating cost is high, especially under the current situation of global warming, abnormal climate, and energy shortage, it does not conform to the concept of sustainable development. Therefore, there is an urgent need A substitute colloid and preparation process

Method used

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  • Preparation method and application of moisture reaction type polyurethane hot-melt adhesive for composite floor
  • Preparation method and application of moisture reaction type polyurethane hot-melt adhesive for composite floor
  • Preparation method and application of moisture reaction type polyurethane hot-melt adhesive for composite floor

Examples

Experimental program
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Effect test

Embodiment 1

[0087] Such as figure 1 As shown, the present invention prepares the method for moisture-responsive polyurethane hot-melt adhesive for composite flooring comprising the following steps:

[0088] Use two kinds of polyol esters: polybutylene adipate (molecular weight: 3000), polyethylene adipate (molecular weight: 2000), chain extender 1.4-BG, put into the reactor The above three raw materials are further added with a nucleating agent, and the added amount of the nucleating agent is 0.6-0.8% of the total weight of the above three raw materials.

[0089] Heat and melt the raw materials in the polymerization reactor, stir and mix evenly, heat slowly to make the material temperature reach 110-120°C, vacuumize the reactor to reduce the vacuum degree in the reactor to below 50torr, then start dehydration, and continue the negative pressure state for 1-3h After nitrogen filling, return to normal pressure to detect the moisture value contained in the material. If the moisture value re...

Embodiment 2

[0096] The present embodiment is roughly the same as Example 1, and the difference is that polyol ester uses polybutylene adipate (molecular weight is 3000), polyethylene adipate (molecular weight is 2000), polybutylene adipate (molecular weight is 2000), The weight ratio of polyneopentyl glycol isophthalate (molecular weight: 2200) and chain extender 1,4-butanediol (BG) is set to 100:27.6:27.6:3.6. Aromatic polyester polyols are introduced into the formula to improve the bonding performance of the adhesive, especially for high-gloss PVC films, acrylic sheets and smooth wood-plastic sheets. Finally, perform a performance test, such as image 3 The infrared spectrogram analysis shown, the test results of mechanical properties and physical and chemical properties are shown in Table 2, and then the aging properties are shown in Table 3.

Embodiment 3

[0098] This embodiment is roughly the same as Example 1, the difference is that the polyol ester uses poly-1,6-hexanediol adipate (molecular weight is 3700), polyneopentyl isophthalate (molecular weight is 2200), chain extender 1,6-hexanediol (HG), the weight ratio is set to 100:100:8.0. In the formulation, 1,6-hexanediol adipate with a molecular weight of 3700 is used to improve the crystallization performance of the adhesive, and an aromatic polyester polyol is added to improve the adhesion to the southern bonding substrate (low polarity). The product in this example is composed of spectrum As shown in the picture, 728cm -1 There is an obvious sharp peak, which has the main characteristic peak of aromatic polyester polyol. This product has very high initial adhesive strength, especially suitable for gluing low-polarity materials, honeycomb panels and solid wood composite floor panels. Finally, perform a performance test, such as Figure 4 The infrared spectrogram analysis...

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Abstract

The invention disclose a preparation method and application of moisture reaction type polyurethane hot-melt adhesive for a composite floor and belongs to the technical field of macromolecule material preparation .According to the method, polyester polyol, diisocyanate and chain extender are adopted as basic raw materials, auxiliary agents such as accelerant, a flatting agent and a nucleating agent are combined, and a high temperature polymerization reaction is conducted, so that the moisture reaction type polyurethane hot-melt adhesive (PUR) is obtained .A product prepared through the method is the one-component moisture reaction type polyurethane hot-melt adhesive, no cross-linking agent is used for hardening, and instead, an NCO functional group with the resin molecular chain tail end reactive is adopted for reacting with moisture to achieve cross-linking .The solid content of the product is 100%, no solvent is contained, no solvent is used in the technological process, a baking channel does not need to be arranged, cost is lowered, and no safety or environmental protection problem exists .In addition, the polyurethane adhesive product produced through the method is high in cohesive energy, good in initial adhesion and excellent in heat resistance, weather resistance, hydrolysis resistance and aging resistance after being cured and can be widely applied to processing of building decorative materials.

Description

technical field [0001] The invention relates to a preparation method and application of a moisture-responsive polyurethane hot-melt adhesive (PUR) for a composite floor. This method uses polyester polyol, diisocyanate, and chain extender as basic raw materials, together with additives such as catalyst, leveling agent, and nucleating agent, to form a moisture-responsive polyurethane hot-melt adhesive (PUR) through high-temperature polymerization. . The product of the invention has a solid content of 100% and does not contain solvents. The product has excellent bonding performance and excellent aging resistance, and belongs to the technical field of polymer material preparation. Background technique [0002] There are many kinds of polyurethanes. Polyurethanes with different uses and performance requirements can be prepared according to the types of polyols, diisocyanates, chain extenders, basic raw materials, molecular weights, differences in structure and functionality, as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/42C08G18/32C09J175/06
CPCC08G18/3206C08G18/4202C08G18/4211C08G18/4238C08G18/664C08G2170/20C08L2205/03C09J175/06C08L33/04
Inventor 林棋灿
Owner 高鼎精细化工(昆山)有限公司
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