| Show artificial rubber the ery throne rubber produced produce from alco alcohol liol by a russian chemist is stated to be 10 chemically identical with natural L rubber though it diff differs ersin in properties by being more rapidly oxidized in the first pa part rt of the process of manufacture nir air Is pumped through alco liol and the ml mixed L d N vapors are passed pasted through copper tubes containing heated beatel spirals of red copper and silver gauze this gives acetic I 1 ay and paraldehyde mixed with more alcohol these substances are arc passed over stron strongly gly heated boated aluminum oxide and the resulting cry Is collected in th the presence of a small quantity of a catalyst the raw cry rubber thus produced is fitted for use by mixing with about 15 per cent of various substances including tannins fannins and load oxide to aid in vulcanization and rubber resins to give greater elasticity |
