Plaster-shape regenerated rubber and preparation method thereof

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...

Images