Claims
- 1. A water-swellable adhesive water water stop which is a shaped and vulcanized body of a vulcanizable rubber composition comprising, as a blend:
- (A) 100 parts by weight of a butyl rubber;
- (B) from 1 to 50 parts by weight of a highly water-absorptive polymeric electrolyte;
- (C) from 30 to 200 parts by parts by weight of an inorganic water-absorbent;
- (D) from 10 to 50 parts by weight of a tackifier;
- (E) from 30 to 200 parts by weight of a plasticizer;
- (F) from 1 to 10 parts by weight of a vulcanizing agent or a combination of a vulcanizing agent and a vulcanization accelerator, and has a tensile strength in the range from 1 to 30 kgf/cm.sup.2, 100% elastic modulus in the range from 1 to 4 kgf/cm.sup.2, ultimate elongation at break of at least 300% and degree of swelling in water in the range from 150 to 500% after immersion in water for 21 days at 23.degree. C., and
- (G) up to 300 parts by weight of a basic filler.
- 2. The water-swellable adhesive water stop as claimed in claim 1 wherein the inorganic water-absorbent has basicity.
- 3. The water-swellable adhesive water stop as claimed in claim 1 wherein the inorganic water-absorbent is selected from the group consisting of hydrated silicic acid, hydrated silicates and bentonite.
- 4. The water-swellable adhesive water stop as claimed in claim 1 wherein the basic filler is magnesium carbonate hydroxide or calcium carbonate hydroxide.
- 5. The water-swellable adhesive water stop as claimed in claim 1 wherein the vulcanizing agent as the component (F) is selected from the group consisting of sulfur, modified phenolic resins and thiuram compounds.
- 6. The water-swellable adhesive water stop as claimed in claim 1 wherein the vulcanization accelerator as a part of the component (F) is selected from the group consisting of thiourea compounds, thiazole compounds and carbamate compounds.
- 7. The water-swellable adhesive water stop as claimed in claim 1 wherein the amount of the vulcanization accelerator, when the component (F) is a combination of the vulcanizing agent and the vulcanization accelerator, does not exceed the amount of the vulcanizing agent.
Priority Claims (2)
Number |
Date |
Country |
Kind |
1-196039 |
Jul 1989 |
JPX |
|
2-93682 |
Apr 1990 |
JPX |
|
BACKGROUND OF THE INVENTION
This is a continuation-in-part application from a copending U.S. patent application Ser. No. 07/555,084 filed Jul. 19, 1990 now abandoned.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
4366284 |
Ishida et al. |
Dec 1982 |
|
4590227 |
Nakamura et al. |
May 1986 |
|
4740404 |
Otsuga et al. |
Apr 1988 |
|
5075373 |
Takemori et al. |
Dec 1991 |
|
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
555084 |
Jul 1990 |
|