Waterproofing system

Patent metadata

Field	Value
Publication number	US-11597684-B2
Application number	US-201816623058-A
Country	US
Kind code	B2
Filing date	Jun 21, 2018
Priority date	Jun 23, 2017
Publication date	Mar 7, 2023
Grant date	Mar 7, 2023

Abstract

A waterproofing system including a functional layer S 1 including 10-80 wt.-% of at least one thermoplastic polymer P 1 and 10-80 wt.-% of at least one solid particulate filler F, wherein the surface of the functional layer S 1 has an Auto-correlation length of waviness W(Sal) of at least 50 μm. Further, a method for producing a waterproofing system and to the use of a mechanical surface treatment step to increase the waviness factor, determined as the ratio of the Root mean square roughness of waviness W(Sq) to the square of the Auto-correlation length of waviness W(Sal), of a surface of a functional layer S 1.

First claim

The invention claimed is:

1. A method for producing a waterproofing system comprising (i) a functional layer S 1 having a first major surface and a second major surface, and (ii) a barrier layer S 2 having a first major surface bonded to the second major surface of the functional layer S 1 , the first major surface of the functional layer S 1 being not bonded to the barrier layer S 2 , the method comprising:
a least one of extruding and calendering a first thermoplastic composition to form the functional layer S 1 ; and
subjecting the first major surface of the functional layer S 1 to a mechanical surface treatment step selected from the group consisting of grinding, brushing, and abrasive blasting,
wherein the first thermoplastic composition comprises:
a) 10-80 wt.-%, of at least one thermoplastic polymer P 1 , and
b) 10-80 wt.-%, of at least one solid particulate filler F, the proportions being based on a total weight of the first thermoplastic composition.

2. The method according to claim 1 , wherein an amount of water in the first thermoplastic composition is not more than 10 wt.-%, based on the total weight of the first thermoplastic composition.

3. The method according to claim 1 , further comprising employing spaced apart calender cooling rolls through which the formed functional layer S 1 is drawn immediately following the at least one of the extrusion and calendering step.

4. The method according to claim 1 , wherein the barrier layer S 2 has a second major surface, and the method further comprises:
i) co-extruding the first thermoplastic composition and a second thermoplastic composition comprising at least one thermoplastic polymer P 2 through a common die to form a composite article, the first thermoplastic composition forming the functional layer S 1 and the second thermoplastic composition forming the barrier layer S 2 , and
ii) employing spaced apart calender cooling rolls through which the formed composite article is drawn immediately following step i).

5. The method according to claim 1 , wherein the barrier layer S 2 has a second major surface, and the method further comprises:
i) extruding the first thermoplastic composition using a first extrusion apparatus to form the first functional layer S 1 ,
ii) extruding a second thermoplastic composition comprising at least one thermoplastic polymer P 2 using a second extrusion apparatus to form the barrier layer S 2 ,
iii) bonding the formed first functional layer S 1 to the formed barrier layer S 2 to form a composite article, and
iv) employing spaced apart calender cooling rolls through which the formed composite article is drawn immediately following step iii).

6. The method according to claim 1 , wherein the barrier layer S 2 has a second major surface, and the waterproofing system further comprises and a second functional layer S 1 ′ having a first and second major surface, and the method further comprises:
i) co-extruding the first thermoplastic composition and a second thermoplastic composition comprising at least one thermoplastic polymer P 2 through a common die to form a two-layer composite article, the first thermoplastic composition forming the first functional layer and the second thermoplastic composition forming the barrier layer S 2 ,
ii) extruding a third thermoplastic composition using an extrusion apparatus to form the second functional layer S 1 ′, the third thermoplastic composition comprising:
a) 10-80 wt.-%, of at least one thermoplastic polymer P 1 ′,
b) 10-80 wt.-%, of at least one solid particulate filler F′, the proportions being based on a total weight of the third thermoplastic composition,

iii) bonding the formed second functional layer S 1 ′ to the two-layer composite article to form a three-layer composite article,
iv) employing spaced apart calender cooling rolls through which the formed three-layer composite article is drawn immediately following step iii),
v) subjecting the major surface of the functional layer S 1 ′ not bonded to the barrier layer S 2 to a mechanical surface treatment step selected from the group consisting of grinding, brushing, and abrasive blasting.

7. The method according to claim 1 , wherein at least one of the first and second major surfaces of the functional layer S 1 has an auto-correlation length of waviness W(Sal) of at least 50 μm.

Assignees

• Sika Tech Ag

Inventors

• Caviezel Dario
• Huck Wolf-Rüdiger
• Ackermann Herbert

Classifications

• C04B28/04

  Portland cements · CPC title

• B32B27/08 Primary

  of synthetic resin · CPC title

• C04B41/5346

  Dry etching · CPC title

• B32B2264/101

  Glass · CPC title

• B32B27/36

  comprising polyesters · CPC title