CN103467864A

CN103467864A - Preparation technology for regenerating waste butyl rubber

Info

Publication number: CN103467864A
Application number: CN2013103474927A
Authority: CN
Inventors: 程健
Original assignee: SUIZHOU PUKANG RUBBER AND PLASTIC Co Ltd
Current assignee: SUIZHOU PUKANG RUBBER AND PLASTIC Co Ltd
Priority date: 2013-08-12
Filing date: 2013-08-12
Publication date: 2013-12-25

Abstract

The invention relates to the butyl rubber field, and concretely relates to a preparation technology for regenerating waste butyl rubber. The technology is characterized in that the technology concretely comprises the following steps: 1, carefully choosing vulcanized rubber, removing impurities, weighing 65kg of the vulcanized rubber, and crushing in an internal mixer at 90-110DEG C under 6-8mpa for 15-20min; 2, adding 0.7 parts of an oxidant, 3-5 parts of a plasticizer and 2-3 parts of a modifier into the internal mixer, and carrying out a desulphurization reaction at a rapidly-increased temperature of 120-140DEGC under a pressure of 6-8mpa for 20-25min; and 3, discharging obtained rubber to a cooling room, cooling for 24h, and allowing to stand in the cooling room until the temperature is 18-25DEG C. By adopting the above technical scheme, the desulphurization of regenerated butyl rubber produced through the preparation technology is more thorough than that of traditional regenerated butyl rubber, and high-performance high-quality rubber recycle is realized.

Description

A kind of preparation technology of waste butyl rubber recycling utilization

Technical field

The present invention relates to the isoprene-isobutylene rubber field, specifically a kind of preparation technology of waste butyl rubber recycling utilization.

Technical background

Development along with China's rubber item industry, isoprene-isobutylene rubber sales volume at home is that supply falls short of demand, yet the preparation technology of domestic isoprene-isobutylene rubber is still immature, yet the import volume of the isoprene-isobutylene rubber of China reaches more than 80% of aggregate consumption every year, therefore, improve the utilization ratio of isoprene-isobutylene rubber, the recycling utilization of isoprene-isobutylene rubber is most important.Conventional regeneration glue preparation technology generally adopts disposable high temperature desulfurizing technique, and arrive part rubber molecule and the carbonization of part non-refractory material molecule, damage rubber molecular chain, and desulfurization is thorough not, directly reduce the physicochemical property of reclaimed rubber, affecting can not be fully crosslinked in rubber molecule revulcanization process, causes the indices stability of final product poor.

Summary of the invention

The invention discloses a kind of waste butyl rubber and plastify the scheme of the modification regeneration combined with chemical reaction by physics.Through selectedly, in small, broken bits, cooling parking, plasticate, the multistage desulfurization recombining process processes such as refining, slice.Not only improved raw-material utilization ratio, also effectively improved the butyl reclaimed rubber property indices, thereby greatly reduce production cost.

The present invention is achieved like this: a kind of preparation technology of waste butyl rubber recycling utilization, it is characterized in that the concrete technology flow process is as follows: 1, by after the selected removal of impurities of the sizing material after over cure, weighing 65kg drops in Banbury mixer and pulverizes, temperature: 90-110 ℃, pressure 6-8mpa, the time: 15-20 minute; 2, add 0.7 part of oxygenant, 3-5 part softening agent, 2-3 part properties-correcting agent to drop into together in Banbury mixer and carry out desulphurization reaction, temperature rises to 120-140 ℃ fast, pressure 6-8mpa, desulfurization time 20-25 minute; 3, binder removal enters cooling room cooling 24 hours, and cooling room weighing apparatus temperature is to 18-25 ℃; 4, the mill of cooled rubber powder weighing 65kg to 560 type is undertaken by the effect of mechanical shear stress to book is logical plasticates, and install automatic blender left and right back and forth evenly feeding smash glue, reach the effect that uniform, fine is plasticated, roll spacing 0.5-1mm, time 20-30 minute, roller temperature 45-65 ℃, then be adjusted to gap 4-6mm and smash after glue is plasticated 3-5 minute and batch lower and park to cooling room is cooling, and the cooling room warm 18-25 ℃ that weighs parks 4-8 hour; 5, broken-(down)rubber weighing 30kg to 450 type refiner is carried out to convertible refining desulfuration, roll spacing 0.2-0.5mm, roller temperature 65-85 ℃, time 35-55 minute, to the soft smooth surface of sizing material be after the woven design shape lower sheet batch park 24 hours finished product.

Owing to having adopted technique scheme, the more traditional butyl renewable rubber desulfurization of butyl renewable rubber that this preparation technology produces is more thorough, reaches the purpose of high-performance, the recycle of high quality rubber.

Embodiment

Below in conjunction with example, the invention will be further described.

1, by after the selected removal of impurities of the sizing material after over cure, weighing 65kg drops in Banbury mixer and pulverizes, temperature: 90-110 ℃, pressure 6-8mpa, time: 15-20 minute.

2, add 0.7 part of oxygenant, 3-5 part softening agent, 2-3 part properties-correcting agent to drop into together in Banbury mixer and carry out desulphurization reaction, temperature rises to 120-140 ℃ fast, pressure 6-8mpa, desulfurization time 20-25 minute.

3, binder removal enters cooling room cooling 24 hours, and cooling room weighing apparatus temperature is to 18-25 ℃.

4, the mill of cooled rubber powder weighing 65kg to 560 type is undertaken by the effect of mechanical shear stress to book is logical plasticates, and install automatic blender left and right back and forth evenly feeding smash glue, reach the effect that uniform, fine is plasticated.Roll spacing 0.5-1mm, time 20-30 minute, roller temperature 45-65 ℃.Then gap is adjusted to 4-6mm and smashes after glue is plasticated 3-5 minute and batch lower and park to cooling room is cooling, the cooling room warm 18-25 ℃ that weighs parks 4-8 hour.

5, broken-(down)rubber weighing 30kg to 450 type refiner is carried out to convertible refining desulfuration, roll spacing 0.2-0.5mm, roller temperature 65-85 ℃, time 35-55 minute, to the soft smooth surface of sizing material be after the woven design shape lower sheet batch park 24 hours finished product.

By adopting the compound preparation technique of novel butyl reclaimed rubber multistageization, effectively improving modern reclaimed rubber adopts disposable high temperature desulfurizing to part rubber molecule and material molecule carbonization, damage rubber molecular chain, thereby cause the butyl reclaimed rubber physical and chemical index to descend, utilization ratio is low, the defect such as poor stability in use procedure.

1, with modern butyl reclaimed rubber, compare: Mooney viscosity value decline 4-7, the high 2mpa of tensile strength, tensile yield rises more than 45%.

2, reduce waste of material, increase substantially utilization rate of raw materials 25%-30%, thereby reduce production costs 20%-25%.

3, effectively shorten the mixing operating time 1/3 in using production process, the operating procedure stability is good, reduces energy consumption and labour intensity.

4, the modification regeneration scheme that adopts the plasticizing of multistage compound reason to combine with the chemical reaction desulfurization, make butyl renewable rubber desulfurization plasticizing more thorough, rubber molecule desulfurization ratio reaches more than 97%, effectively improve mobility and the compression set phenomenon of glue stuff compounding in vulcanization die cavity, improve the production qualification rate of rubber item.

Claims

1. the preparation technology of a waste butyl rubber recycling utilization, it is characterized in that the concrete technology flow process is as follows: 1, by after the selected removal of impurities of the sizing material after over cure, weighing 65kg drops in Banbury mixer and pulverizes, temperature: 90-110 ℃, pressure 6-8mpa, the time: 15-20 minute; 2, add 0.7 part of oxygenant, 3-5 part softening agent, 2-3 part properties-correcting agent to drop into together in Banbury mixer and carry out desulphurization reaction, temperature rises to 120-140 ℃ fast, pressure 6-8mpa, desulfurization time 20-25 minute; 3, binder removal enters cooling room cooling 24 hours, and cooling room weighing apparatus temperature is to 18-25 ℃; 4, the mill of cooled rubber powder weighing 65kg to 560 type is undertaken by the effect of mechanical shear stress to book is logical plasticates, and install automatic blender left and right back and forth evenly feeding smash glue, reach the effect that uniform, fine is plasticated, roll spacing 0.5-1mm, time 20-30 minute, roller temperature 45-65 ℃, then be adjusted to gap 4-6mm and smash after glue is plasticated 3-5 minute and batch lower and park to cooling room is cooling, and the cooling room warm 18-25 ℃ that weighs parks 4-8 hour; 5, broken-(down)rubber weighing 30kg to 450 type refiner is carried out to convertible refining desulfuration, roll spacing 0.2-0.5mm, roller temperature 65-85 ℃, time 35-55 minute, to the soft smooth surface of sizing material be after the woven design shape lower sheet batch park 24 hours finished product.