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A kind of environment-friendly softener grafted regenerated rubber and its preparation method

A technology of regenerated rubber and softener, which is applied in the field of environmentally friendly softener grafted regenerated rubber and its preparation, which can solve the problems of easy migration of softener, bluish products, Mooney rebound, etc., and achieve low content and excellent physical and mechanical properties. Improvement, Mooney stabilization effect

Active Publication Date: 2019-12-27
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to solve the disadvantages of the existing environmentally friendly reclaimed rubber, such as low mechanical strength, easy migration of softeners, bluish products, Mooney rebound, etc.

Method used

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  • A kind of environment-friendly softener grafted regenerated rubber and its preparation method
  • A kind of environment-friendly softener grafted regenerated rubber and its preparation method
  • A kind of environment-friendly softener grafted regenerated rubber and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of preparation method of softening agent graft regenerated rubber, concrete steps are:

[0027] 1) In parts by weight, add 500 parts by mass of 30-mesh waste rubber powder, 70 parts by mass of cardanol, 2.5 parts by mass of activator, and 20 parts of calcium carbonate into a high-speed mixer and mix evenly; temperature is 80°C, and time is 6 minutes;

[0028] 2) Add the uniformly mixed materials into the internal mixer at a temperature of 200° C., a rotating speed of 40 rpm, and a mixing time of 20 minutes; when mixing for 6 minutes, add 0.5 parts by mass of dicumyl peroxide initiator;

[0029] 3) The reclaimed rubber powder is discharged after cooling, and the discharge temperature is 50°C; the reclaimed rubber powder is thinly passed through the open mill, the roller distance is 0.5mm, the time is 1min, and the final 5mm roller distance is removed to obtain an environmentally friendly softener. sticks of recycled rubber.

Embodiment 2

[0031] A kind of preparation method of softening agent graft regenerated rubber, concrete steps are:

[0032] 1) In parts by weight, add 500 parts by mass of 30-mesh waste rubber powder, 70 parts by mass of cardanol, 2.5 parts by mass of activator, and 20 parts of calcium carbonate into a high-speed mixer and mix evenly; temperature is 80°C, and time is 6 minutes;

[0033] 2) Add the uniformly mixed materials into the internal mixer at a temperature of 200° C., a rotating speed of 40 rpm, and a mixing time of 20 minutes; when mixing for 6 minutes, add 1 mass part of dicumyl peroxide initiator;

[0034] 3) The reclaimed rubber powder is discharged after cooling, and the discharge temperature is 50°C; the reclaimed rubber powder is thinly passed through the open mill, the roller distance is 0.5mm, the time is 1min, and the final 5mm roller distance is removed to obtain an environmentally friendly softener. sticks of recycled rubber.

Embodiment 3

[0036] A kind of preparation method of softening agent graft regenerated rubber, concrete steps are:

[0037] 1) In parts by weight, add 500 parts by mass of 30-mesh waste rubber powder, 70 parts by mass of cardanol, 2.5 parts by mass of activator, and 20 parts of calcium carbonate into a high-speed mixer and mix evenly; temperature is 80°C, and time is 6 minutes;

[0038] 2) Add the uniformly mixed materials into the internal mixer at a temperature of 200° C., a rotating speed of 40 rpm, and a mixing time of 20 minutes; when mixing for 6 minutes, add 1.5 parts by mass of dicumyl peroxide initiator;

[0039] 3) The reclaimed rubber powder is discharged after cooling, and the discharge temperature is 50°C; the reclaimed rubber powder is thinly passed through the open mill, the roller distance is 0.5mm, the time is 1min, and the final 5mm roller distance is removed to obtain an environmentally friendly softener. sticks of recycled rubber.

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Abstract

The invention provides environment-friendly softening agent grafted regenerated rubber and a preparation method thereof. The preparation method comprises the following steps: taking vegetable oil containing phenolic hydroxyl groups and unsaturated alkyl chains as a regenerated rubber softening agent, adding an organic peroxide initiator in the waste rubber powder regeneration process, initiating double-bond or three-bond rupture to the regenerated rubber to produce free radicals, combining the free radicals with free radicals formed by a thermal oxidation effect in the rubber powder regeneration process, and grafting a free softening agent in the regenerated rubber onto a main chain of the regenerated rubber. The regenerated rubber prepared by the method disclosed by the invention has theadvantages of being green, environment-friendly, non-blueing, excellent in mechanical property and stable in Mooney.

Description

technical field [0001] The invention relates to an environment-friendly softener grafted regenerated rubber and a preparation method thereof, belonging to the field of waste resource recovery and reuse. Background technique [0002] With the development of the automobile and transportation industries, the recycling and treatment of waste rubber products such as tires, rubber hoses, and tapes has become a major environmental protection issue. Since the vulcanized rubber contains a three-dimensional cross-linked structure, it cannot be biodegraded, hydrolyzed, or decomposed like plants and animals. Therefore, the research on waste rubber regeneration methods that are more energy-saving, more environmentally friendly, and more suitable for industrialization has become a field of polymer research. a hot issue. Summary Currently reported waste rubber treatment technologies include mechanical methods, thermochemical methods, microwave methods, ultrasonic methods, and microbial de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08C19/38C08C19/28C08L17/00
CPCC08C19/28C08C19/38C08L17/00
Inventor 李文博辛振祥张广法
Owner QINGDAO UNIV OF SCI & TECH
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