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Rubber affinity-type aqueous polyurethane adhesive, and preparation method thereof

A water-based polyurethane and adhesive technology, applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., can solve the problems that cannot be omitted, poor persistence, unusable, etc., to increase polarity and reduce production Cycle, the effect of ensuring stability

Inactive Publication Date: 2019-10-15
福建华夏蓝新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned technologies all have a common shortcoming: they must be used as a separate process and cannot be omitted.
[0007] In addition, the B powder in the two-component rubber treatment agent disclosed in the literature will continuously release active chlorine in the solvent, and will be unusable after 24 hours, and the persistence is poor; the rubber treatment agent disclosed in the literature and CN109293845A all contain a large amount of Solvent, although it can be used as a cleaning agent to clean the rubber surface and increase the depth of B powder entering the rubber, it runs counter to the current environmental protection trend

Method used

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  • Rubber affinity-type aqueous polyurethane adhesive, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Add 1 mol of polyoxyethylene ether-50 (PEG-50), 0.02 mol of 2,2-dimethylol propionic acid and 0.18 mol of n-octanol into the reaction kettle, raise the temperature to 120°C, and remove moisture by vacuuming , until the weight ratio of water is 0.03%; cool down to 45°C, add 1.11 mol of hexamethylene diisocyanate to the system, and raise the temperature to 100°C, react for 0.5 hours and cool down to 40°C to obtain an isocyanate prepolymer;

[0030] (2) Take 0.18 mol 1,3-dibromo-1,3,5-triazine-2,4,6-trione, add 1.8 mol butanone to dissolve, slowly add 0.18 mol sodium methoxide, and stir at 25°C for 2 hours After filtering, collect the filtrate;

[0031] (3) Add 40 mol butanone to the isocyanate prepolymer in step (1) to reduce the viscosity of the system, add the filtrate obtained in step (2), heat up to 75°C, react for 1 hour and cool down to 30-40°C;

[0032] (4) After slowly adding 3 kg of water dropwise, recover the butanone in the system by vacuum distillation. T...

Embodiment 2

[0035] (1) Add 1 mol of polyoxypropylene ether-30 (PPG-30), 0.1 mol of 2,2-dimethylolpropionic acid and 0.26 mol of lauryl alcohol into the reaction kettle, raise the temperature to 150°C, and remove the water by vacuuming, until the weight ratio of water is 0.07%; cool down to 40°C, add 1.23 mol 2,4-toluene diisocyanate to the system, and raise the temperature to 60°C, react for 8 hours and cool down to 40°C to obtain an isocyanate prepolymer;

[0036] (2) Take 0.15 mol 1,3-dibromo-1,3,5-triazine-2,4,6-trione, add 1.5 mol butanone to dissolve, slowly add 0.15 mol sodium ethoxide, and stir at 25°C for 2 hours After filtering, collect the filtrate;

[0037](3) Add 30 mol butanone to the isocyanate prepolymer in step (1) to reduce the viscosity of the system, add the filtrate obtained in step (2), and then add 0.11 mol polyoxypropylene ether-30 (PPG-30), Raise the temperature to 50°C, and cool down to 30-40°C after reacting for 5 hours;

[0038] (4) After slowly adding 2.5 kg ...

Embodiment 3

[0041] (1) Add 1 mol polyoxyethylene-20-polyoxypropylene-20 copolymer (PEG-20-co-PPG-20), 0.08 mol 2,2-dimethylolbutyric acid and 0.14 mol n-decyl alcohol In the reaction kettle, heat up to 150°C, vacuumize to remove water until the weight ratio of water is 0.09%; cool down to 50°C, add 1.15 mol of diphenylmethane diisocyanate to the system, and raise the temperature to 70°C, react for 3 hours and then cool down to 40°C to obtain isocyanate prepolymer;

[0042] (2) Take 0.05 mol of 1,3-dibromo-1,3,5-triazine-2,4,6-trione, add 5 mol of butanone to dissolve, slowly add 0.05 mol of sodium ethoxide, and stir at 30°C for 1 hour After filtering, collect the filtrate;

[0043] (3) Add 35 mol butanone to the isocyanate prepolymer in step (1) to reduce the viscosity of the system, add the filtrate obtained in step (2), and then add 0.09 mol polyoxyethylene-20-polyoxypropylene-20 to copolymerize (PEG-20-co-PPG-20), heat up to 65°C, react for 4 hours and cool down to 30-40°C;

[0044]...

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Abstract

The invention discloses a rubber affinity-type aqueous polyurethane adhesive, and a preparation method thereof. According to the rubber affinity-type aqueous polyurethane adhesive, N-Br bonds in an alkanol-bromoisocyanuric acid structure of the rubber affinity-type aqueous polyurethane adhesive can be broke easily through heating, and stable imide negative ion structures and bromine positive ionsare formed; bromine positive ions are reacted with water to form hypobromous acid with excellent oxidation capacity, hypobromous acid and unsaturated bonds in rubber are subjected to addition reaction, so that rubber polarity is increased, and excellent affinity of rubber with an aqueous polyurethane dispersion system is achieved. Because of introduction of alkanol groups, the large e bond electron cloud density of alkanol-bromoisocyanuric acid is increased, the stability of imide negative ions is reduced, the activity of N-Br bonds at normal temperature is reduced, and system stability is ensured. No additive is needed by the rubber affinity-type aqueous polyurethane adhesive; the bonding strength on rubber is high; stability is high; the rubber affinity-type aqueous polyurethane adhesiveis capable of reducing shoe production technology steps, and shortening production period.

Description

technical field [0001] The invention relates to a rubber-affinity water-based polyurethane adhesive and a preparation method thereof. Background technique [0002] In the modern shoe industry, a large number of cross-linked rubber is used as the sole. Cross-linked rubber is a highly elastic polymer material with reversible deformation. The common ones can be divided into natural rubber, general-purpose rubber, styrene-butadiene rubber, nitrile rubber, butadiene rubber, isoprene rubber, ethylene-propylene rubber, neoprene, etc. . Due to the low polarity of rubber, the polarity of polyurethane adhesives, especially water-based polyurethane adhesives, is quite different. Polyurethane adhesive, so that the rubber sole and upper can be firmly attached together. [0003] The medicaments widely used in the market are two-component products: solvent and B powder. The solvent is acetone, n-hexane, cyclohexanone, ethyl acetate, toluene, etc. The function of the solvent is to clean...

Claims

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Application Information

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IPC IPC(8): C09J175/08C08G18/66C08G18/48C08G18/34C08G18/12
CPCC08G18/12C08G18/348C08G18/4825C08G18/4833C08G18/4837C08G18/6692C09J175/08
Inventor 邱元进饶长贵陈国栋
Owner 福建华夏蓝新材料科技有限公司
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