How to prevent rubber sheet from frosting?
Rubber board is easy to appear in the process of making and using the phenomenon of spray frost, so how to prevent it?
First, improve rubber varieties
The same binder has different solubility in different raw materials, and different raw materials have different solubility parameters. Therefore, if the rubber performance meets the requirements of use, it can be selected or used with high solubility of raw rubber. In general, the solubility of the complex in SR is greater than that of NR. Raw glue with similar solubility parameters was selected. To select or use the glue with good performance required; Reduce the dosage of the adjuvant and other measures to avoid the frosting of adjuvant 1.
Second, adjust the coordination of the adjuvant
For example, in the lide powder, more green adhesive materials made of medium chrome yellow are used, and the vulcanized glue will turn white after being placed for a period of time. Crocking of two possible reasons: one is the zinc sulfide encounter acid material in the vulcanization process lithopone is decomposed to generate hydrogen sulfide, hydrogen sulfide and chromium in Huang Zhong lead chromate, generate lead sulfide, lead sulfide on the surface of oxidized in the process of storage, the generated white lead sulfate; The other is that lead ions in lead chromate react with carbonate to form lead white.
To add people to the formula coumarone five copies, weigh in hand PVC resin five copies, use the ointment, reclaimed rubber (because it contains a large number of large molecular weight tar) to improve the solubility and chelating agent in rubber spray frost conditions can ease.
The forest will turn yellow, the paraffin oil with low viscosity is good, and the paraffin oil containing naphthene finishing oil is better than pure paraffin oil. Only DBP or DOP's styrofoam is easy to spray, with pine tar or with pine tar/vaseline.