Synthesis method of high-softening-point tackifying resin for rubber

A technology of high softening point and tackifying resin, which is applied in the field of synthesizing high softening point tackifying resin for rubber, can solve the problem of not keeping the viscosity for a long time, and achieve the effects of low cost, good bonding performance and simple synthesis process.

Inactive Publication Date: 2014-03-05
SHANDONG LAIWU RUNDA NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the initial tack of the alkylphenolic resin compound is good, the tack does not last long

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Get p-tert-butylphenol 40g, copper acetate 3.5g and pack in 25mL autoclave, and use N 2 Replace the air in the kettle. After the material is melted, the reactant is heated to 170° C. under stirring, and 1-hexyne is introduced, and the pressure is maintained at 5.0 MPa, and the reaction is performed at a constant temperature for 10 hours. The resultant was dried in a vacuum oven at 130° C. for 4 hours to prepare a rubber tackifying resin.

[0018] The softening point test adopts the ring and ball method, GB / T 8146. Resin bond strength test: use natural rubber 100, carbon black 50, process oil 6, tackifying resin 6, mix with φ152mm open mill, control the temperature of radial cylinder above 80°C, and test under the same conditions Measure its peel force. Test piece preparation: paste on one side surface of the test piece (specification is 250mm * 25mm * 2mm) with zinc oxide adhesive plaster, as reinforcement layer; Paste cellophane on the other side surface of the test...

Embodiment 2

[0021] Put 40 grams of p-nonylphenol and 4 grams of calcium acetate into a 25mL autoclave, and use N 2 Replace the air in the kettle. After the material is melted, the reactant is heated to 190° C. under stirring, acetylene is passed through, and the pressure is maintained at 1.0 MPa, and the reaction is carried out at constant temperature for 13 hours. The resultant was dried in a vacuum oven at 100° C. for 2 hours to prepare a rubber tackifying resin.

[0022] After testing: the obtained resin has a softening point of 148°C, and after storage for 100 hours, the adhesive strength is 1.6 kN / m.

Embodiment 3

[0024] 40 grams of p-dodecylphenol and 2.4 grams of zinc acetate are packed into a 25mL autoclave, and the 2 Replace the air in the kettle. After the material is melted, the reactant is heated to 210° C. under stirring, and propyne is passed through, and the pressure is kept at 2.0 MPa, and the reaction is carried out at a constant temperature for 30 hours. The resultant was dried in a vacuum oven at 150° C. for 2.5 hours to prepare a rubber tackifying resin.

[0025] After testing: the obtained resin has a softening point of 142°C, and after storage for 100 hours, the adhesive strength is 1.8 kN / m.

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Abstract

The invention discloses a synthesis method of high-softening-point tackifying resin for rubber. The synthesis method comprises the following steps: adding alkyl substituted phenol and a metal acetate catalyst into a reaction kettle and replacing N2 for air in the kettle, wherein the alkyl substituted phenol is p-nonyl phenol or p-dodecylphenol or p-tert-octylphenol or p-tert-butyl phenol or p-tert-butylphenol, and the metal acetate catalyst is calcium acetate or zinc acetate or cadmium acetate or copper acetate or cobalt acetate; heating the alkyl substituted phenol and the catalyst under the stirring state, introducing acetylene or allylene or 1-butyne or 1-pentyne or 1-hexin, and performing a constant-temperature reaction; and drying the product obtained after the reaction in a vacuum drying box to prepare the high-softening-point tackifying resin for rubber. Compared with the existing preparation method of a tackifier, the synthesis method has the advantages of simple process, low cost and high adhesive property. The softening point of the obtained tackifying resin for rubber is more than 142 DEG C, and the adhesive strength of the tackifying resin for rubber is more than 1.0 kN/m after the tackifying resin for rubber is stored for 100 hours.

Description

[0001] technical field [0002] The invention relates to a synthetic method of resin, in particular to a synthetic method of high softening point tackifying resin for rubber. Background technique [0003] With the development of the rubber industry, the amount of synthetic rubber is increasing rapidly, and the application field is also expanding. With the continuous improvement of processing technology, the requirements for rubber adhesion performance are getting higher and higher. Rubber tackifying resins include rosin and its resin esters, terpene resins, coumarone resins, petroleum resins, and alkylphenolic resins. At present, the most widely used in China are octyl phenolic resin and tert-butyl phenolic resin. Alkylphenol formaldehyde tackifying resins, especially those based on phenol containing tertiary carbon atoms in the para position of the phenolic hydroxyl group, have a better tackifying effect. This is because the phenolic hydroxyl groups in its molecular struc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C08L7/00
Inventor 李长彬刘卫国吕德峰万峰秦书茂
Owner SHANDONG LAIWU RUNDA NEW MATERIAL
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