PL184792B1 - Tar pitch for cold use - Google Patents

Abstract

Tar binder for cold application, consisting of coal tar pitch with a softening point according to Kramer-Samow of 65-100°C in the amount of 50-80% by weight, a modifier in the amount of up to 50% by weight, solvents in the amount of 10-30% by weight and a mineral filler in the amount of 15-35% by weight, characterized in that it contains a waste furfural-butadiene copolymer in the amount of 0.5-80% by weight as a modifier

Description

The subject of the invention is a cold tar adhesive for sticking roofing felt to roofing felt, making light insulation coatings without a roofing insert and for preserving old roofing.

Cold-use adhesives consisting of asphalt, fillers, solvents and plasticizers are known. They are also known as building insulation materials, compositions containing bitumens of carbon origin, such as coal pitches and tars or high-molecular polymers. To modify carbon pitch, styrene-butadiene rubbers or chlorinated polyurethane, epoxy and phenol-formaldehyde resins are used. Polyvinyl chloride, polypropylene and polystyrene are also used. Solvents and mineral fillers are added to the modified alloys.

A disadvantage of the known compositions containing bitumens of coal origin is the difficulty of melting them with known modifiers due to the limited ductility and miscibility.

The object of the invention is to develop a new grade of cold-applied mastic containing coal pitch.

The essence of the invention consists in the use of furfurol-butadiene copolymer in the amount of 0.5-80% by weight as a modifier. Furfurol-butadiene copolymer is a waste product from the extractive distillation process of a fraction consisting of a mixture of various isomers with four carbon atoms in the molecule, from which the butadiene is released by extraction.

The composition of the adhesive according to the invention is illustrated in the working examples.

Example 1.

38.5 kg of pitch with a Kramer-Samow softening point of 70 ° C and 25.6 kg of furfurol-butadiene copolymer were melted (under reflux) at a temperature of 120 ° C. The molten ingredients were mixed thoroughly and then 19.2 kg of solvent naphtha and 16.7 kg of rock flour were added (with continued stirring).

The properties of the obtained mass were as follows:

- dynamic viscosity at 20 ° C - 19,900nPPas

- run-off at 60 ± 2 ° C at 45 ° slope - positive

- flexibility - dodaphnia result

Example 2.

32.5 kg of pitch with a Kramer-Samow softening point of 80 ° C and 27.5 kg of furfurol-butadiene copolymer were melted (under reflux) at 130 ° C. The molten ingredients were mixed thoroughly and then 12.2 kg of solvent naphtha, 9.8 kg of xylene and 18 kg of rock flour were added (with continuous mixing).

184 792

The properties of the obtained mass were as follows:

- dynamic viscosity at 20 ° C

- run-off at a temperature of 60 ± 2 ° C

000 mPa · s at the angle of inclination - flexibility - positive result - positive result

Bituminous products obtained according to the recipes given in the above examples corresponded to the general and specific quality requirements contained in PN-74 / B-24620 Cold asphalt mastic.

As demonstrated by the tests carried out, the produced alloy consisting of coal pitch, furfurol-butadiene copolymer, solvent and filler is a tackifier that meets all the requirements for bituminous products used cold.

184 792

Publishing Department of the UP RP. Circulation of 50 copies

Price PLN 2.00.

Claims (1)

Patent claim Tar mastic for cold application, consisting of coal pitch with a softening point according to Kramer-Samow 65-100 ° C in the amount of 50-80% by weight, modifier in the amount of up to 50% by weight, solvents in the amount of 10-30% by weight and mineral filler in an amount of 15-35% by weight, characterized in that the modifier is waste furfurol-butadiene copolymer in an amount of 0.5-80% by weight.