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Hot melt adhesive formula

A hot-melt adhesive and formula technology, applied in the directions of adhesives, sol preparation, colloid chemistry, etc., can solve the problems affecting processing efficiency and quality, low mixing and mixing efficiency, etc., to improve the effect and efficiency, avoid uneven mixing, and improve mixing. effect of effect

Inactive Publication Date: 2020-12-15
董洋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to make up for the deficiencies of the existing technology and solve the problem that the stirring and mixing efficiency of the existing hot melt adhesive is low during the preparation of the stirring device, which affects the subsequent processing efficiency and quality, a hot melt adhesive formula proposed by the present invention

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0033] The preparation method of the silane-terminated polyurethane prepolymer comprises the following steps:

[0034] S1. First dehydrate the hydroxy-terminated siloxane and hydroxy-terminated polyether, mix them with p-toluene diisocyanate, put them into the reaction tank and stir evenly, and under vacuum regulation, control the temperature at 65°C to 95°C for 4 to 5 hours. , to prepare a polyurethane prepolymer with terminal isocyanate groups;

[0035] S2. Add anhydrous toluene to the reaction tank, then lower the temperature to 30°C-60°C, drop the silane coupling agent into the polyurethane prepolymer, keep it warm for 0.3h-2h, and remove the toluene in a vacuum to obtain silane-capped Polyurethane prepolymer;

[0036]Wherein, the reaction tank includes a tank body 1 and a stirring device inside thereof, the upper end of the tank body 1 is provided with a feed inlet 2, and the lower end of the tank body 1 is provided with a discharge port; the stirring device includes a t...

Embodiment approach

[0040] As an embodiment of the present invention, a plurality of obliquely arranged elastic plates 16 are arranged at intervals outside the annular frame 13, one end of the elastic plates 16 is fixedly connected to the annular frame 13, and the other end of the elastic plates 16 is arranged in a cantilever manner. And a spring 17 is arranged between the elastic plate 16 . The arrangement of the elastic plate 16 can further improve the vertically inward disturbing ability of the ring frame 13, and then when the elastic plate 16 rotates to the lower side of the ring frame 13, it can scrape the material deposited in the lower layer, thus avoiding the problem of material self-stratification , to improve the uniformity of mixing.

[0041] As an embodiment of the present invention, spiral stirring teeth 8 are provided on the outer tube 9 close to the side of the mounting plate 7, and the rotation direction of the two spiral stirring teeth 8 is opposite; the lower end of the spiral s...

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Abstract

The invention relates to the technical field of hot melt adhesives, in particular to a hot melt adhesive formula, a reaction tank used in the hot melt adhesive formula comprises a tank body and a stirring device in the tank body, a feeding port is formed in the upper end of the tank body, and a discharging port is formed in the lower end of the tank body; the stirring device comprises two supporting frames which are symmetrically arranged at the bottom in the tank body, a rotating shaft is arranged between the supporting frames, and one end of the rotating shaft extends out of the tank body tobe in transmission connection with a motor; the rotating shaft between the supporting frames is sleeved with a shaft sleeve, the shaft sleeve is connected with the inner side of an annular frame through a plurality of connecting rods, and the annular frame and the shaft sleeve are coaxially arranged; first bevel gears are symmetrically fixed to the left side and the right side of the annular frame. Through the arrangement of the first helical gear and the stirring fins, acceleration can be performed in the vertical direction and the horizontal direction, so that the convection speed of materials in the tank body is increased, the mixing effect and efficiency of the silane-terminated polyurethane prepolymer are further improved, and the quality of the hot melt adhesive is guaranteed.

Description

technical field [0001] The invention relates to the technical field of hot melt adhesives, in particular to a hot melt adhesive formula. Background technique [0002] Hot melt adhesive is a kind of plastic adhesive. Its physical state changes with temperature within a certain temperature range, but its chemical properties remain unchanged. According to the different base materials used, hot melt adhesives can be divided into polyurethane (PU), polyamide (PA), ethylene-vinyl acetate (EVA), polyester (PET) and block copolymers (such as SIS )Wait. Among them, polyurethane (PU) is a kind of polymer with certain molecular weight synthesized under certain conditions with polyisocyanate and polyol polymer. [0003] At present, polyurethane adhesives are mainly divided into three categories according to their components: solvent-based polyurethane adhesives, water-based polyurethane adhesives and polyurethane hot-melt adhesives. Polyurethane hot-melt adhesives can be divided into...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00B01J19/18B01J19/00B01F7/16B01F7/00B01F15/00C09J175/08C09J11/04
CPCB01J13/0021B01J19/18B01J19/0066C09J175/08C09J11/04B01J2219/0072C08K2201/011B01F27/192B01F27/80B01F35/3204B01F2101/36C08K3/36
Inventor 董洋金静
Owner 董洋
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