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Amino acid modified alkylphenol-formaldehyde resin and preparation method thereof

A formaldehyde resin and amino acid technology, applied in the field of tackifying resins, can solve the problems that alkylphenol-formaldehyde resins do not have storage stickiness, wet heat stickiness, can not meet the production needs of high-end tires and rubber products, and the production process is complicated, etc., to achieve the goal of tackifying Excellent permanence and wet-heat tack performance, improved initial tack and long-lasting tack, and reduced migration

Inactive Publication Date: 2020-03-06
SHANDONG YANGGU HUATAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, alkylphenol-formaldehyde resins do not have outstanding storage viscosity and excellent wet-heat viscosity properties, and cannot meet the production needs of high-grade tires and rubber products.
At present, some high-end tire manufacturers choose an imported super tackifying resin (p-tert-butylphenol-acetylene resin), whose production process is extremely complicated and expensive

Method used

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  • Amino acid modified alkylphenol-formaldehyde resin and preparation method thereof
  • Amino acid modified alkylphenol-formaldehyde resin and preparation method thereof
  • Amino acid modified alkylphenol-formaldehyde resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] In the synthesis of amino acid modified p-tert-butylphenol-formaldehyde resin, concentrated sulfuric acid is used as an acidic catalyst, p-tert-butylphenol, liquid formaldehyde and solid formaldehyde are used as raw materials, and the mixture of DL-leucine is used as a modifier. Butylphenol: liquid formaldehyde: solid formaldehyde (molar ratio) = 1:0.51:0.34; amino acid addition is 5% of p-tert-butylphenol. Specific steps are as follows:

[0045] Step 1: Add 100 g (0.67 mol) of p-tert-butylphenol and 0.2 g of concentrated sulfuric acid to a 500 ml four-necked round-bottomed reaction flask equipped with a mechanical stirrer, a thermometer, a reflux condenser and a dropping funnel. The temperature was raised to 90°C, 41.8g of formaldehyde solution (37wt%) was slowly added dropwise, and the reaction was refluxed for 1h;

[0046] Step 2: After the reflux reaction, 5.0 g of amino acid was added to carry out the modification reaction, and the reaction was continued for 1 hou...

Embodiment 2

[0049] In the synthesis of amino acid modified p-tert-butylphenol-formaldehyde resin, hydrochloric acid is used as an acidic catalyst, p-tert-octylphenol, liquid formaldehyde and solid formaldehyde are used as raw materials, and the mixture of D-glutamic acid and L-glutamic acid is used as Modifier, p-tert-octylphenol: liquid formaldehyde: solid formaldehyde (molar ratio) = 1:0.54:0.36; amino acid addition is 5% of p-tert-butylphenol. Concrete steps are with embodiment 1.

[0050] The product is weighed under cooling, and the productive rate is 99% based on alkylphenol. After measurement, the softening point of this resin is 108 ℃, and the molecular weight measured by gel permeation chromatography (GPC) method is 1672g / mol, and the mass percentage of free p-tetylphenol in the resin measured by bromination method is 0.6%. , the moisture mass content is less than 1%.

Embodiment 3

[0052] Synthesis of amino acid modified p-tertyl phenol-formaldehyde resin, using p-toluenesulfonic acid as an acidic catalyst, p-tertyl phenol, liquid formaldehyde and solid formaldehyde as raw materials, and a mixture of DL-alanine as a modifier; p-tert-octylphenol: liquid formaldehyde: solid formaldehyde (molar ratio)=1:0.54:0.36; amino acid addition is 5% of p-tert-butylphenol. Concrete steps are with embodiment 1.

[0053] The product is weighed under cooling, and the productive rate is 99% based on alkylphenol. After measuring, the softening point of this resin is 138 ℃, and the molecular weight measured by gel permeation chromatography (GPC) method is 1701g / mol, and the mass percentage of free p-tetylphenol in the resin measured by bromination method is 0.5%. , the moisture mass content is less than 1%.

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Abstract

The invention provides amino acid modified alkylphenol-formaldehyde resin. The invention further provides a preparation method of the amino acid modified alkylphenol-formaldehyde resin, a complex separation process of DL mixed amino acid is avoided, the modified alkylphenol-formaldehyde resin has extremely high tackifying performance, and the tackifying durability and damp-heat viscosity performance of the modified alkylphenol-formaldehyde resin are excellent. The amino acid modified alkylphenol-formaldehyde resin also has the following advantages that when raw materials are used, the condition of using solid formaldehyde is provided, so that part of formaldehyde aqueous solution is replaced, and the wastewater amount is greatly reduced; the amino acid modified alkylphenol-formaldehyde resin is selected, so that the branching degree of a product can be greatly improved, and the tackifying performance of the resin is improved; amino acid not only contains amino, carboxyl and long-chainalkane functional groups, but also can effectively improve the intermiscibility of resin and rubber materials and reduce the migration rate, so that the lasting viscosity of rubber sheets is improved.

Description

technical field [0001] The invention belongs to the technical field of tackifying resins, in particular to an amino acid modified alkylphenol-formaldehyde resin and a preparation method thereof. Background technique [0002] Radial tires are commonly known as "steel tires". It is a new type of tire in which the carcass cords are arranged in the meridian direction, and the buffer layer arranged in the circumferential direction or close to the circumferential direction of the cords is tightly hooped on the carcass. The bonding strength of the steel wire greatly affects the quality of the radial tire. Therefore, rubber self-adhesiveness is very important in the molding process, so it is also called molding tack; in addition, if there is a lack of adhesion between the rubber compounds, especially for synthetic rubber compounds, the creep of semi-finished rubber parts will cause dimensional deformation, tires The finished product will be detached from the adhesive part due to th...

Claims

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Application Information

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IPC IPC(8): C08G8/28C08G8/12
CPCC08G8/28C08G8/12C08G2380/00
Inventor 杜孟成李庆朝黄存影李剑波宋彦哲师利龙
Owner SHANDONG YANGGU HUATAI CHEM
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