GB1566404A - Sealing strips - Google Patents

Sealing strips Download PDF

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Publication number
GB1566404A
GB1566404A GB384476A GB384476A GB1566404A GB 1566404 A GB1566404 A GB 1566404A GB 384476 A GB384476 A GB 384476A GB 384476 A GB384476 A GB 384476A GB 1566404 A GB1566404 A GB 1566404A
Authority
GB
United Kingdom
Prior art keywords
sealing strip
coating
strip according
water soluble
sealing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB384476A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GRACE Ltd W
Original Assignee
GRACE Ltd W
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GRACE Ltd W filed Critical GRACE Ltd W
Priority to GB384476A priority Critical patent/GB1566404A/en
Publication of GB1566404A publication Critical patent/GB1566404A/en
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66—Sealings
    • E04B1/68—Sealings of joints, e.g. expansion joints

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Description

(54) SEALING STRIPS (71) We. W.R. GRACE LIMITED, A British Company of Elveden Road, Park Royal, London N.W.10, do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be described in and by the following statement: This invention relates to sealing strips.
It is known to seal a gap so as to prevent the passage of water and moisture therethrough, for example a gap in a building structure, particularly a gap between two concrete surfaces or between a concrete surface and a surface of some other material, by the use of a sealing strip which comprises a core of an elastically deformable material, e.g. an organic polymer, which may be foamed, and a coating on the core of a waterproofing contact adhesive composition. The core may for example be composed of a foamed natural or synthetic rubber, e.g. polychloroprene, polyurethane or butyl rubber, or a foamed nonelastomeric polymer, e.g. polyvinyl chloride or polyethylene. The core may of any suitable cross section, but is usually round or rectangular, and of any suitable dimensions, with the maximum dimension usually being from 0.25 to 6.0 inch, and the minimum dimension from 0.1 to 1.0 inch.The contact adhesive coating may be of any suitable material, for example a bituminous composition, especially a composition formed of natural or synthetic rubber, virgin or reclaimed, blended into a blown bitumen to provide a smooth mix; other types of adhesive composition may include polychloroprene, butyl rubber, oil-based mastics, rosin or rosin derivatives. The thickness of the coating is usually 0.025 to 0.25 inch, with thicknesses in the upper part of this range being preferred, e.g. 0.1 inch or more, e.g.
0.125 inch. More detailed description of sealing strips of this kind is to be found in our British Specifications, Nos. 1,116,835 and 1,201,154.
A disadvantage of the known sealing strips of this kind is that they must first be positioned against one surface and the other surface is then brought into position so that the strip is compressed and seals the gap between the surfaces. It is difficult or impossible to use such a strip to seal an existing gap between two surfaces, because the adhesive coating prevents the strip from being pushed into the gap.
According to the present invention there is provided a sealing strip including a core of a material which is elastically deformable under ambient conditions, a coating of a waterproofing contact adhesive surrounding the core and, on said coating, an outer coating of a water soluble material which is not a contact adhesive.
We have discovered that if the known sealing strip is given an outer coating of a water soluble material, by which we mean a material which will form a true or colloidal solution, which is not a contact adhesive, it can then be used to seal an existing gap by first applying water to the wall surfaces of the joint and pushing the strip into the gap, since the water on the walls of the joint, in dissolving the water soluble outer coating, ensures that the latter then acts as a lubricant which also prevents the contact adhesive from dragging along the walls of the joint. Once the strip is in place the water soluble coating has no effect on the performance of the strip as the water soluble coating will be dissolved by water present at the walls of the joint which, upon drying out will then permit the contact adhesive to stick to the walls of the joint.This is particularly so as the strip is held in place under compression. An alternative method of dissolving the water soluble material is to immerse the strip in water and force the strip into the gap while still wet. Additional ly, the former two methods may be used jointly, i.e. the walls of the joint may be wetted and also the strip may be immersed in water immediately prior to installation.
Another advantage provided by the water soluble outer coating is that it makes the strip easier and cleaner to handle and the use of a release paper becomes unnecessary.
The water soluble outer coating is preferably a continuous coating over the entire surface of the strip and it should of course be such that it remains adherent to the contact adhesive until the strip is in position.
A very thin coating e.g. 0.00025" - 0.001" is generally sufficient, although a thicker coating can be used providing that it will dissolve satisfactorily either during or following the installation of the strip.
The water soluble coating can be composed of a water soluble organic polymer, e.g. methyl cellulose, regenerated cellulose, polyvinyl acetate, polyvinyl alcohol, gelatine, water soluble gum or soluble starch or dextrin. It can can also be a soap. The coating can be formed by wrapping a film of a suitable polymer around a conventional sealing strip or by passing the strip through a bath containing a solution of a water soluble material, e.g. in water followed by drying.
We prefer to use the former method.
WHAT WE CLAIM IS: 1. A sealing strip including a core of a material which is elastically deformable under ambient conditions, a coating of a waterproofing contact adhesive surrounding the core and, on said coating, an outer coating of a water soluble material which is not a contact adhesive.
2. A sealing strip according to claim 1 wherein the outer coating is of a thickness of from 0.00025 to 0.001 inch.
3. A sealing strip according to claim 1 or 2 wherein the outer coating is continuous over the entire strip.
4. A sealing strip according to claim 1, 2 or 3 wherein the outer coating is of a water soluble organic polymer.
5. A sealing strip according to claim 4 wherein the organic polymer is one of methyl cellulose, regenerated cellulose, polyvinyl acetate, polyvinyl alcohol, gelatine, water soluble gum, soluble starch or dextrin.
6. A sealing strip according to claim 1, 2 or 3 wherein the outer coating is of soap.
7. A sealing strip according to any preceding claim wherein the outer coating is applied by immersion of the strip in a bath in which the water soluble material is dissolved followed by drying.
8. A sealing strip according to any one of claims 1 to 6 wherein the outer coating is applied by wrapping a film of the water soluble material around the strip.
9. A sealing strip according to any preceding claim wherein the core is of an organic polymer.
10. A sealing strip according to claim 9 wherein the organic polymer is foamed.
11. A sealing strip according to any preceding claim wherein the contact adhesive is a bitumen/rubber composition.
12. A sealing strip according to claim 1 and substantially as hereinbefore described.
13. A method of sealing a gap formed between two surfaces by pressing into the gap a sealing strip according to any preceding claim, the surfaces of the gap having been wetted with water.
14. A method of sealing a gap formed between two surfaces by pressing into the gap a sealing strip according to any one of claims 1 to 12, the outer coating of the strip having been wetted with water.
15. A method of sealing a gap formed between two surfaces by pressing into the gap a sealing strip according to any one of claims 1 to 12, the surfaces of the gap and the outer coating of the strip having been wetted with water.
16. Methods of sealing gaps substantially as hereinbefore described and using a sealing strip according to claim 1.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (16)

**WARNING** start of CLMS field may overlap end of DESC **. ly, the former two methods may be used jointly, i.e. the walls of the joint may be wetted and also the strip may be immersed in water immediately prior to installation. Another advantage provided by the water soluble outer coating is that it makes the strip easier and cleaner to handle and the use of a release paper becomes unnecessary. The water soluble outer coating is preferably a continuous coating over the entire surface of the strip and it should of course be such that it remains adherent to the contact adhesive until the strip is in position. A very thin coating e.g. 0.00025" - 0.001" is generally sufficient, although a thicker coating can be used providing that it will dissolve satisfactorily either during or following the installation of the strip. The water soluble coating can be composed of a water soluble organic polymer, e.g. methyl cellulose, regenerated cellulose, polyvinyl acetate, polyvinyl alcohol, gelatine, water soluble gum or soluble starch or dextrin. It can can also be a soap. The coating can be formed by wrapping a film of a suitable polymer around a conventional sealing strip or by passing the strip through a bath containing a solution of a water soluble material, e.g. in water followed by drying. We prefer to use the former method. WHAT WE CLAIM IS:
1. A sealing strip including a core of a material which is elastically deformable under ambient conditions, a coating of a waterproofing contact adhesive surrounding the core and, on said coating, an outer coating of a water soluble material which is not a contact adhesive.
2. A sealing strip according to claim 1 wherein the outer coating is of a thickness of from 0.00025 to 0.001 inch.
3. A sealing strip according to claim 1 or 2 wherein the outer coating is continuous over the entire strip.
4. A sealing strip according to claim 1, 2 or 3 wherein the outer coating is of a water soluble organic polymer.
5. A sealing strip according to claim 4 wherein the organic polymer is one of methyl cellulose, regenerated cellulose, polyvinyl acetate, polyvinyl alcohol, gelatine, water soluble gum, soluble starch or dextrin.
6. A sealing strip according to claim 1, 2 or 3 wherein the outer coating is of soap.
7. A sealing strip according to any preceding claim wherein the outer coating is applied by immersion of the strip in a bath in which the water soluble material is dissolved followed by drying.
8. A sealing strip according to any one of claims 1 to 6 wherein the outer coating is applied by wrapping a film of the water soluble material around the strip.
9. A sealing strip according to any preceding claim wherein the core is of an organic polymer.
10. A sealing strip according to claim 9 wherein the organic polymer is foamed.
11. A sealing strip according to any preceding claim wherein the contact adhesive is a bitumen/rubber composition.
12. A sealing strip according to claim 1 and substantially as hereinbefore described.
13. A method of sealing a gap formed between two surfaces by pressing into the gap a sealing strip according to any preceding claim, the surfaces of the gap having been wetted with water.
14. A method of sealing a gap formed between two surfaces by pressing into the gap a sealing strip according to any one of claims 1 to 12, the outer coating of the strip having been wetted with water.
15. A method of sealing a gap formed between two surfaces by pressing into the gap a sealing strip according to any one of claims 1 to 12, the surfaces of the gap and the outer coating of the strip having been wetted with water.
16. Methods of sealing gaps substantially as hereinbefore described and using a sealing strip according to claim 1.
GB384476A 1976-11-25 1976-11-25 Sealing strips Expired GB1566404A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB384476A GB1566404A (en) 1976-11-25 1976-11-25 Sealing strips

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB384476A GB1566404A (en) 1976-11-25 1976-11-25 Sealing strips

Publications (1)

Publication Number Publication Date
GB1566404A true GB1566404A (en) 1980-04-30

Family

ID=9766003

Family Applications (1)

Application Number Title Priority Date Filing Date
GB384476A Expired GB1566404A (en) 1976-11-25 1976-11-25 Sealing strips

Country Status (1)

Country Link
GB (1) GB1566404A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0604537A1 (en) * 1991-09-19 1994-07-06 Smithkline Beecham Corporation Adhesive products
GB2469441A (en) * 2009-04-14 2010-10-20 Arrow Coated Products Liner-less self-adhesive material, used for labels, having water soluble coating

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0604537A1 (en) * 1991-09-19 1994-07-06 Smithkline Beecham Corporation Adhesive products
EP0604537A4 (en) * 1991-09-19 1995-02-15 Smithkline Beecham Corp Adhesive products.
GB2469441A (en) * 2009-04-14 2010-10-20 Arrow Coated Products Liner-less self-adhesive material, used for labels, having water soluble coating
GB2469441B (en) * 2009-04-14 2011-07-13 Arrow Coated Products Self-adhesive material with a water-soluble protective layer

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PCNP Patent ceased through non-payment of renewal fee