A kind of production process of pressure-sensitive adhesive for waterproof membrane

Abstract

The invention discloses a production process of a pressure-sensitive adhesive for a waterproof roll. The production process comprises the following steps: by taking a styrene-isoprene-styrene block copolymer, hydrogenated C5 petroleum resins, hydrogenated rosin resins, naphthenic oil, rutile titanium dioxide, an antioxidant and an ultraviolet light absorber as raw materials, producing the pressure-sensitive adhesive by adopting a differential co-rotating twin screw extruder. Time in the mixing process is short, material ageing can be avoided, and the differential co-rotating twin screw extruder is capable of realizing continuous production. The produced adhesive can be timely delivered to a pre-laying roll production line, so that the adhesive is used up in time; and therefore, the adhesive does not need to be stored for a long time. Moreover, the produced pressure-sensitive adhesive is bright in color, excellent in weather resistance, excellent in initial adhesion and holding power and high in peel strength with concrete.

Description

technical field [0001] The invention relates to a production process of pressure-sensitive adhesive for waterproof coiled material. Background technique [0002] At present, there are two types of pre-paved waterproof membranes for underground space waterproofing: one is asphalt-based pre-paved waterproof membranes, and the other is non-bitumen-based pre-paved waterproof membranes. [0003] Non-asphalt-based pre-paved waterproofing membranes have developed rapidly in recent years. The main material of this type of waterproofing membranes is polymer sheets, and the adhesive layer is made of pressure-sensitive adhesives. During production and construction, there is no smoke and environmental protection. Good, convenient construction, comprehensive cost-effective. [0004] Conventional production of pressure-sensitive adhesives generally uses a ribbon reactor, but the mixing effect of the ribbon reactor is poor, and the production process takes a long time; and the ribbon reac...

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Problems solved by technology

[0004] Conventional production of pressure-sensitive adhesives generally uses a ribbon reactor, but the mixing effect of the ribbon reactor is poor, and the production process takes a long time; and the ribbon reactor cannot be used for continuous production, and only intermittent production methods can be used. The batch size is one ton or more, and the product needs to be stored at 160-180°C for a period of time after it is discharged, so as to be used in the pre-laid coil production line; the glue needs to be kept at high temperature for a long time during the production and storage process, which is easy to cause glue aging , so that the performance of the glue is reduced, and the whole glue making process is not easy to control

[0005] In addition, the existing pressure-sensitive adhesive system has poor weather resistance

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