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Thermoplastic polymer compositions with improved flexibility

A thermoplastic composition, polymer technology, used in building construction, roof insulation, roof cladding, etc., can solve problems such as less successful, unsuitable TPO materials, etc.

Pending Publication Date: 2022-01-11
SIKA TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, these methods have proven less successful because mineral oils (even if selected to have low vapor pressure and high viscosity) tend to migrate from the polymer matrix over time.
Mineral oil migration makes these types of TPO materials less suitable for use in roofing applications where membranes are often exposed to relatively high temperatures, such as 60-80°C

Method used

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  • Thermoplastic polymer compositions with improved flexibility
  • Thermoplastic polymer compositions with improved flexibility

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0134] The following materials were used in the examples:

[0135] Table 1

[0136]

[0137] Preparation of shaped articles

[0138] Shaped articles (sheets) were produced using a laboratory-scale extrusion-calendering plant consisting of a twin-screw extruder (Berstorff GmbH), a flat die and a set of water-cooled calender rolls.

[0139] In the production of shaped articles, the ingredients of the thermoplastic composition shown in Table 2 were fed into the hopper of the extruder. The blend was melt processed in an extruder and extruded through a flat die into a single layer sheet having a thickness of about 1.5 mm. Extrusion was performed using an extrusion temperature of approximately 180°C.

[0140] Flexibility

[0141] Flexibility of the molded articles was determined by measuring the storage modulus (G') of the test specimens at temperatures of -30°C, 0°C and +30°C. The storage modulus was measured by dynamic mechanical analysis (DMA) using a method based on ...

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PUM

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Abstract

The invention is directed to a thermoplastic composition comprising at least one butene-1 (co)polymer, at least one heterophasic propylene copolymer, and at least one propylene-based elastomer. The invention is also related to use of the thermoplastic composition according to any one of previous claims for producing a shaped article, to a shaped article comprising a substrate layer comprising the thermoplastic composition of the present invention, to a method for producing a shaped article, and to a method for covering a substrate using the shaped articles of the present invention.

Description

technical field [0001] The present invention relates to thermoplastic polymer compositions and their use for the production of industrial liners such as waterproofing and roofing membranes. [0002] Background of the invention [0003] In the construction sector, polymer sheets, often called membranes or panels, are used to protect underground and above-ground structures, such as basements, tunnels, and flat and low-slope roofs, against water penetration. For example, waterproofing membranes are applied to prevent the ingress of water through cracks that form in concrete structures due to building settlement, load deformation, or concrete shrinkage. Roofing membranes are applied to the surface of roofing substrates to be waterproofed, such as insulation boards or decking in flat and low-slope roof constructions. Waterproofing and roofing membranes are usually shipped to building sites in rolls, transferred to the installation site, unrolled, and adhered to the substrate to b...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08L23/14C08L23/20C08L53/00C08K3/22E04D13/16
CPCC08L23/16E04D13/1687C08K2003/2227C08L2207/04C08L23/142C08L23/20C08L53/00C08K3/22C08L2207/02C08L23/12B29C48/022B29C48/911B29C48/0011B29C63/02B29C65/02B29C66/43B29K2105/0085C08J5/18C08J2323/16C08J2423/20C08L2205/03
Inventor O·科内贝尔
Owner SIKA TECH AG
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