Modified thermoplastic phenolic resin adhesive and production method

A phenolic resin and thermoplastic technology, applied in the field of phenolic resin adhesives, can solve the problems of high production environment of free phenols, affect the adhesive force of adhesives, increase production costs, etc., achieve low content of free phenols and free aldehydes, improve Quality, strong adhesion effect

Inactive Publication Date: 2012-11-21
ZHEJIANG HANGMO SYNTHETIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the softness is poor, so other softeners need to be added in the brake pad manufacturing process, which not only increases the production cost, but also affects the adhesive force of the adhesive; in addition, the production of the thermoplastic phenolic resin adhesive The process generally has a high level of free phenol, which causes a lot of pollution to the production environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1, a modified thermoplastic phenolic resin adhesive, its composition and proportion by weight are: 1 part of phenol, 0.7 part of formaldehyde, 0.0008 part of sulfuric acid, and 0.04 part of methyl glucoside.

[0015] Preparation method: including the following process steps:

[0016] ①. Put the aldehyde and phenol into the reaction kettle according to the proportion of the components, and first add 10% acid, heat to 100 ℃, react for 30 minutes, then gradually add the remaining acid within 45 minutes, and continue the reaction for 30 minutes;

[0017] ②. Then add methyl glucoside to react for 30 minutes, control the temperature at 100°C, turn on the vacuum pump at the same time to control the pressure of the reactor to 0.07Pa, and carry out dehydration for 5 hours to obtain the product.

[0018] The product has been tested: gelation time (s): 70, free phenol content (%): 1.5, volatile matter content (%): 2.4.

Embodiment 2

[0019] Example 2, a modified thermoplastic phenolic resin adhesive, its components and proportions by weight percentage are: 1 part of o-cresol, 0.8 part of paraformaldehyde, 0.0008 part of oxalic acid, and 0.2 part of methyl glucoside.

[0020] Preparation method: including the following process steps:

[0021] ①. Put the aldehyde and phenol into the reaction kettle according to the proportion of the components, and first add 10% acid, heat to 100 ℃, react for 30 minutes, then gradually add the remaining acid within 45 minutes, and continue the reaction for 30 minutes;

[0022] ②. Then add methyl glucoside to react for 30 minutes, control the temperature at 100°C, turn on the vacuum pump at the same time to control the pressure of the reactor to 0.07Pa, and carry out dehydration for 5 hours to obtain the product.

[0023] The product has been tested: gelation time (s): 90, free phenol content (%): 1.8, volatile matter content (%): 2.7.

Embodiment 3

[0024] Embodiment 3, a modified thermoplastic phenolic resin adhesive, its composition and composition ratio by weight percentage are: 0.6 parts of phenol, 0.4 parts of o-cresol, 0.75 parts of formaldehyde, 0.0008 parts of hydrochloric acid, and 0.03 parts of methyl glucoside share.

[0025] Preparation method: including the following process steps:

[0026] ①. Put the aldehyde and phenol into the reaction kettle according to the proportion of the components, and first add 10% acid, heat to 100 ℃, react for 30 minutes, then gradually add the remaining acid within 45 minutes, and continue the reaction for 30 minutes;

[0027] ②. Then add methyl glucoside to react for 30 minutes, control the temperature at 100°C, turn on the vacuum pump at the same time to control the pressure of the reactor to 0.07Pa, and carry out dehydration for 5 hours to obtain the product.

[0028] The product has been tested: gelation time (s): 80, free phenol content (%): 1.6, volatile matter ...

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Abstract

The invention relates to a modified thermoplastic phenolic resin adhesive, which comprises the following components by weight: 1 part of phenol, 0.7-0.8 parts of aldehyde, 0.0008 parts of acidity and 0.02-0.04 parts of methyl glucoside. A production method comprises the following steps: adding aldehyde and phenol according to proportion into a reaction vessel, adding 10% of acidity and heating to the temperature of 100 DEG C, reacting for 30 minutes, gradually adding residual acidity in 45 minutes, continuously reacting for 30 minutes, then adding methyl glucoside for reacting for 30 minutes, controlling the temperature of 100 DEG C, and simultaneously unlatching a vacuum pump to control the reaction vessel pressure at 0.07Pa, dehydrating for 5 hours to obtain the product. The modified thermoplastic phenolic resin adhesive can enhance the quality of the thermoplastic phenolic resin adhesive, and reduce the production cost without adding a softener in the product, and can effectively overcome the problem of large environmental pollution due to high content of free phenol and free aldehyde of a traditional thermoplastic phenolic resin adhesive.

Description

technical field [0001] The invention relates to an adhesive, especially a phenolic resin adhesive used for automobile brake pads. Background technique [0002] For the adhesive used for automobile brake pads, it is generally required to have strong adhesion, high temperature resistance, certain softness and high carbon residue content. And the phenolic resin type automobile brake pad adhesive commonly used at present has the advantage of strong bonding force and strong rigidity. The disadvantage is that the softness is poor, so other softeners need to be added in the brake pad manufacturing process, which not only increases the production cost, but also affects the adhesive force of the adhesive; in addition, the production of the thermoplastic phenolic resin adhesive The process generally has the problem of high free phenol, which causes great pollution to the production environment. Contents of the invention [0003] One of the purposes of the present invention is to p...

Claims

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Application Information

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IPC IPC(8): C09J161/14C08G8/28
Inventor 王雪鸿王俊
Owner ZHEJIANG HANGMO SYNTHETIC MATERIAL
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