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Waterproof sheet and method for waterproofing construction

A technology of waterproof sheet and construction method, applied in the direction of gasket, infrastructure engineering, pressure-sensitive film/sheet, etc., can solve the problems of reduced adhesion, loss of pressure-sensitive adhesive layer, etc., and achieve excellent adhesion durability Effect

Inactive Publication Date: 2017-08-18
SHIN ETSU CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the adhered part is made of porous materials such as asphalt and plaster, the pressure-sensitive adhesive layer may be lost if it is used in a high-temperature environment above 100°C, and there is a problem that the adhesiveness may decrease.

Method used

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  • Waterproof sheet and method for waterproofing construction
  • Waterproof sheet and method for waterproofing construction
  • Waterproof sheet and method for waterproofing construction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0112] As an addition reaction curing type silicone rubber composition, in the kneading type dimethyl silicone rubber composition KE-675-U (manufactured by Shin-Etsu Chemical Co., Ltd.), C- 19A / 0.5 parts, C-19B / 2.4 parts (all manufactured by Shin-Etsu Chemical Co., Ltd.) were added and mixed, and formed into a sheet with a thickness of 0.7 mm on a 100 μm PET film with wrinkles by calendering, and continuously It heat-cured at 140 degreeC for 10 minutes in the heating furnace, and obtained the base material layer A in the state laminated|stacked on the PET film.

[0113] On the other hand, a compound composed of (CH 2 =CH)(CH 3 ) 2 SiO 1 / 2 unit, (CH 3 ) 3 SiO 1 / 2 Cell and SiO 2 A resinous copolymer composed of units [((CH 2 =CH)(CH 3 ) 2 SiO 1 / 2 Unit+(CH3 ) 3 SiO 1 / 2 unit) / SiO 2 Unit (molar ratio) = 0.85, CH 2 = CH-group content: 0.0008 mol / g] 7.5 parts of 50% toluene solution were put into a stirring mixer, and after mixing for 30 minutes, the toluene was comple...

Embodiment 2

[0117] A base material layer A was obtained in the same manner as in Example 1. In addition to being used as a cross-linking agent, the (CH 3 ) 2 HSio 1 / 2 Cell and SiO 2 The silicone rubber composition B, the adhesive composition B, and the 2 Layer の lamination cured sheet B.

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Abstract

A waterproof sheet which comprises a base layer constituted of a silicone rubber and a pressure-sensitive adhesive layer superposed thereon and which is for use in preventing the infiltration of rainwater, etc., characterized in that the pressure-sensitive adhesive layer is constituted of a cured object of an addition reaction type curable silicone composition in which the theoretical amount of crosslinks is 0.005-0.01 mol / g and the ratio of the amount of SiH groups to the amount of alkenyl groups, SiH / alkenyl, is 0.5-1.1 by mole and which, when cured, has a hardness as measured with a CSR-2 type hardness meter of 3-20. This waterproof sheet can be used over a long period without decreasing in physical property, and has waterproofing properties over a long period. In particular, by delimiting the hardness and adhesive force of the pressure-sensitive adhesive layer, the waterproof sheet can be made to withstand long-term use. The waterproof sheet exhibits excellent durability concerning pressure-sensitive adhesive properties especially in high-humidity or high-temperature environments.

Description

technical field [0001] The present invention relates to a waterproof sheet and a waterproof construction method of the waterproof sheet which are effective in preventing the intrusion of rainwater etc., and particularly relates to a pressure-sensitive adhesive layer which has a certain level of adhesive properties even if the entire waterproof sheet is immersed in water. A waterproof sheet and a waterproof construction method for the waterproof sheet that have stable airtightness even under wet or high temperature conditions. Background technique [0002] Waterproof sheets are used to prevent disadvantages such as rusting due to intrusion of rainwater, degradation, damage, etc., from occurring. For example, medium to large outdoor tanks such as petroleum tanks and chemical storage tanks are covered with a waterproof sheet on the boundary between the bottom and the base to prevent the intrusion of rainwater, suppress rust on the bottom of the tank, and prevent the of damage....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D27/38C09J7/38
CPCE02D27/38C09J2483/00C09J2483/006C09J7/38E02D31/04E02D2300/0001E02D2300/0025C09J2301/312Y02A30/30E04H7/00E02D2450/106C08G77/04
Inventor 宇野贵雄中岛刚山口久治依田昌弘
Owner SHIN ETSU CHEM CO LTD
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