Plaster-shape regenerated rubber and preparation method thereof

A reclaimed rubber and paste technology, which is applied in the field of paste reclaimed rubber and its production, achieves the effect of reducing costs, deducting kneading and refining processes after desulfurization, and avoiding environmental pollution

Inactive Publication Date: 2008-01-09
TIANJIN YATENGDA RUBBER & PLASTIC PRODS DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most importantly, it can solve the recycling problem of waste rubber containing high-strength fibers

Method used

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  • Plaster-shape regenerated rubber and preparation method thereof
  • Plaster-shape regenerated rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] After the waste rubber tires are pulverized, 30 mesh vulcanized rubber powder is obtained,

[0040] Take the following recipe:

[0041] 30 mesh vulcanized rubber powder: 100kg

[0042] Solvent:

[0043] Paraffin oil 70kg

[0044] Solid Coumarone 22kg

[0045] Catalyst and co-catalyst

[0046] Phthalic anhydride 3kg

[0047] Formaldehyde solution 4.5kg

[0048] Resorcinol 0.5kg

[0049] Total; 200kg

[0050] Craftsmanship

[0051] Put 100kg of vulcanized rubber powder into the vertical depolymerizer, add solvent paraffin oil, solid coumarone, catalyst and co-catalyst phthalic anhydride, formaldehyde aqueous solution, resorcinol in sequence, close the feeding port, stir and heat up To 180°C, control the pressure at 0.5 MPa, react for 2.5 hours, cool down and let off the residual gas, then discharge the material, filter with a 100-mesh metal screen to obtain a paste-like regenerated rubber.

[0052] Combine the obtained paste regenerated rubber with synthetic rub...

Embodiment 2

[0069] After the waste rubber tires are pulverized, 30 mesh vulcanized rubber powder is obtained,

[0070] Take the following recipe:

[0071] 30 mesh vulcanized rubber powder: 100kg

[0072] Solvent:

[0073] Paraffin oil 80kg

[0074] Solid Coumarone 20kg

[0075] Catalyst and co-catalyst

[0076] Phthalic anhydride 5kg

[0077] Formaldehyde solution 4.3kg

[0078] Resorcinol 0.3kg

[0079] Total; 200kg

[0080] Craftsmanship

[0081] Put 100kg of vulcanized rubber powder into the vertical depolymerizer, add solvent paraffin oil, solid coumarone, catalyst and co-catalyst phthalic anhydride, formaldehyde aqueous solution, resorcinol in sequence, close the feeding port, stir and heat up To 160°C, control the pressure at 0.6MPa, react for 2.5 hours, cool down and let off the residual gas, then discharge the material, filter with a 100-mesh metal screen to obtain a paste-like regenerated rubber.

[0082] Combine the obtained paste regenerated rubber with natural rubber...

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Abstract

A creamed reclaimed rubber and its production are disclosed. It consists of 20-50 mesh vulcanized rubber powder 100 proportion, paraffin oil as solvent 70-90 proportion, solid coumarone 10-30 proportion as solvent, catalyst and catalyst accessory phthalic acid anhydride 2-5 proportion, methyl aldehyde aqueous solution 4-6 proportion, 1,3-benzenediol 0.2-0.5 proportion. The process is carried out by adding vulcanized rubber powder into vertical de-polymerizer, adding into solvent, catalyst and catalyst accessory successively, closing feeding open, agitating, raising temperature to 160-180 deg. C, controlling pressure to 0.5-0.7 MPa, reacting for 2-2.5 hrs, lowering temperature, releasing gas, discharging and filtering to obtain final product. It's simple, has stable quality, waterproof and antiseptic performances and no environmental pollution. It can be used to synthesize rubber with petrochemical asphalt and to paving road.

Description

Technical field: [0001] The invention relates to a method for making reclaimed rubber from vulcanized rubber powder. In particular, a paste-like regenerated rubber and a preparation method thereof. Background technique: [0002] Vulcanized rubber powder mainly comes from waste tires, waste rubber shoes, waste rubber hoses and scraps in the rubber production process. It belongs to industrial solid waste. In order to protect the living environment of human beings and develop circular economy, the resource recycling of waste rubber Utilization has attracted attention at home and abroad. [0003] At present, the comprehensive utilization of waste rubber in my country is mainly to produce reclaimed rubber. For the production of reclaimed rubber from vulcanized rubber powder, the method used is mainly the high-temperature dynamic desulfurization method, that is, after the waste rubber is crushed into vulcanized rubber powder, it is heated at a temperature of 210°C. After 1.5-2 ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L17/00C08J3/00C08J11/26
CPCY02W30/62
Inventor 郑宏祥张子宏刘新酉杨涵
Owner TIANJIN YATENGDA RUBBER & PLASTIC PRODS DEV
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