Modified polyvinyl butyral waterproof coiled material

A polyvinyl butyral and waterproofing membrane technology, which is applied in the direction of roofing, hydraulic engineering, building insulation materials, etc. using flexible materials, can solve the problems such as cold resistance to be improved, construction efficiency is reduced, difficulties, etc., and achieves widening processing. Temperature range, effect of improving low temperature resistance, increasing mechanical strength

Inactive Publication Date: 2011-11-16
ZHENGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When processing or using as a waterproof material, unmodified polyvinyl butyral has the following three defects: (1) polyvinyl butyral has a sticking phenomenon during processing
Polyvinyl butyral is a self-adhesive material with excellent adhesion to various surfaces. This is the advantage of polyvinyl butyral as a waterproof material, but it is also its disadvantage in production and processing. The self-adhesiveness of polyvinyl butyral leads to the sticking phenomenon in the production of polyvinyl butyral waterproof materials, which makes the process complicated and difficult
(2) The cold resistance of polyvinyl butyral needs to be improved
The glass transition temperature of polyvinyl butyral is about 50°C. In winter, the polyvinyl butyral sheet becomes stiff in the severe cold area in the north, which is not conducive to construction and reduces construction efficiency.
(3) Polyvinyl butyral is stable to alkalis and oxidants, but unstable in acidic solutions
The polyvinyl butyral macromolecular chain contains acetal groups, and the acetal groups are hydrolyzed under acidic conditions, which reduces the mechanical strength of polyvinyl butyral and reduces the application range of polyvinyl butyral waterproofing membranes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: The ratio of raw materials of the modified polyvinyl butyral waterproof coiled material by mass is:

[0024] Recycled waste polyvinyl butyral: 90 parts

[0025] Reclaimed rubber: 10 parts

[0026] Dioctyl phthalate: 20 parts

[0027] Borax: 5 parts

[0028] Talc powder: 15 parts

[0029] The waterproof membrane is made through the following production process:

[0030] (1) Mixing: After batching according to the above-mentioned raw materials and proportioning, carry out mixing in an internal mixer, the mixing temperature is 80°C, and the mixing time is 15 minutes;

[0031] (2) masticating into sheets: masticating the kneaded material into strips or flakes on an open mill at a temperature of 60° C. for 5 minutes;

[0032] (3) Extrusion and shaping: use a rubber single-screw extruder to extrude and shape, and the extrusion temperature is 110 ° C;

[0033] (4) Calendering forming: use a three-roll calender production line to calender to obtain a coil wi...

Embodiment 2

[0034] Embodiment 2: The ratio of raw materials of the modified polyvinyl butyral waterproof coiled material by mass is:

[0035] Recycled waste polyvinyl butyral: 70 parts

[0036] Natural rubber: 30 parts

[0037] Boric acid: 0.1 parts

[0038] Carbon black: 40 parts

[0039] The waterproof membrane is made through the following production process:

[0040] (1) Mixing: After batching according to the above-mentioned raw materials and proportioning, carry out mixing in an internal mixer, the mixing temperature is 50°C, and the mixing time is 20 minutes;

[0041] (2) masticating into sheets: masticating the kneaded material into strips or flakes on the open mill, the temperature is 55°C, and the time is 3min;

[0042] (3) Extrusion and shaping: use a rubber single-screw extruder to extrude and shape, and the extrusion temperature is 80°C;

[0043] (4) Calendering forming: use a three-roll calender production line to calender to obtain a coil with a thickness of 1.0-4.0mm,...

Embodiment 3

[0044] Embodiment 3: The ratio of the raw materials of the modified polyvinyl butyral waterproof coiled material by mass is:

[0045] Recycled waste polyvinyl butyral: 80 parts

[0046] Styrene-butadiene-styrene thermoplastic elastomer (SBS): 20 parts

[0047] Borax: 1 part

[0048] Dioctyl adipate: 10 parts

[0049] Clay powder: 20 parts

[0050] The preparation process of the modified polyvinyl butyral waterproof membrane comprises the following steps:

[0051] (1) Mixing: After batching according to the above-mentioned raw materials and proportioning, carry out mixing in an internal mixer, the mixing temperature is 95°C, and the mixing time is 8 minutes;

[0052](2) masticating into sheets: masticating the kneaded material into strips or flakes on the open mill, the temperature is 75°C, and the time is 3min;

[0053] (3) Extrusion and shaping: use a rubber single-screw extruder to extrude and shape, and the extrusion temperature is 100 ° C;

[0054] (4) Calendering fo...

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Abstract

The invention relates to a waterproof material for construction, in particular to a waterproof coiled material prepared from modified waste polyvinyl butyral materials as raw materials, belonging to the technical field of construction engineering waterproof materials. The modified polyvinyl butyral waterproof coiled material is prepared by using recovered waste PVB (Polyvinyl Butyral) as main rawmaterials and rubber or elastic bodies as main auxiliary materials and matching with a plasticizer, a releasing agent, a stuffing and other auxiliary materials, and a preparation method comprises thesteps of: mixing the materials in an internal mixer according to a certain ratio, plasticating into strips or slabs in an open mill, entering a rubber single-screw extrusion molding machine for molding, and then processing on a tri-roll calender production line to obtain the coiled material of a determined thickness. The modified waste polyvinyl butyral waterproof coiled material has the properties of ageing resistance, good elasticity, bending resistance, ultraviolet radiation resistance, chemical corrosion resistance, water penetration resistance and the like.

Description

technical field [0001] The invention relates to a waterproof material for construction, in particular to a waterproof coiled material prepared from waste polyvinyl butyral modified material, and belongs to the technical field of waterproof materials for construction engineering. Background technique [0002] Waterproof materials are important functional materials required by the construction industry and other related industries. With the rapid development of my country's economy, the fields of construction, bridges, tunnels, agricultural water conservancy and transportation have put forward various and high-quality requirements for waterproof materials. . Waterproof materials mainly include waterproof coatings and waterproof membranes. Waterproof membranes can be divided into asphalt membranes, polyvinyl chloride (PVC), ethylene-propylene-diene rubber (EPDM), and reclaimed rubber. Asphalt membranes have the disadvantages of large deformation and short service life due to th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/14C08L7/00C08L9/06C08L23/22C08L9/02C08L17/00C08L53/02C08L23/16C08K13/02C08K3/38C08K5/11C08K5/12E04D5/10E04B1/66E02D31/02E02B3/16E01D19/08
Inventor 曹艳霞严欣兵李自力朱明明张卡卡张艳丽许从李晓龙李海鹏侯树帆
Owner ZHENGZHOU UNIV
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