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EP0059062A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Water-swellable composite caulking material for preventing water leakage

Assignee: Kuraray Co Ltd

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Filing: 1982-02-16

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Granted: —

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Expires: 2002-02-16

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Abstract

Abstract The invention provides a novel water-swellable caulking material which is a composite body of stratified structure composed of at least one rubbery layer swellable in water comprising highly water absorbing resin dispersed in the matrix of a rubber and at least one rubbery layer which does not swell in water integrally bonded together, the latter layer serving to prevent the expansion of the former layer when swollen in water in the directions other than the direction perpendicular to the plane of the layers. The caulking material can exhibit an excellent water sealing effect with ease of handling in addition to a rapid water absorption by virtue of the structure thereof preventing the expansion of the material in the directions of length and width without decreasing the expansion in the direction of thickness.

Inventors

👤 Hiroshi Harima
👤 Yoshihiro Yoshioka
👤 Toshihiro Kimura
👤 Kazuhiro Takasaki

Bibliographic Details

Application Number —

Jurisdiction EP

Data Source google_patents

Last Synchronized 2026-11-02 21:38

CPC Classifications

B; B32; B32B; B32B25/00; B32B25/04; B32B25/042; B32B25/16; B63; B63B; B63B5/00; B63B5/02; B63B5/06; B63B5/065; E; E04; E04B; E04B1/00; E04B1/62; E04B1/66; E04B1/68; B32B2250/00; B32B2250/03; B32B2250/40; B32B2305/00; B32B2305/72; B32B2581/00; E04B2001/6818; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31826; Y10T428/31833; Y10T428/31837; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31917; Y10T428/31924

Claims Analysis

Total Claims: 16

Claim 1

Independent Claim 84 words

A water-swellable caulking material which is a composite body of stratified structure comprising (A) at least one water-swellable rubbery layer containing a highly water absorbing resin dispersed in the matrix of a rubber and (B) at least one rubbery layer which does not swell in water, the said layers (A) and (B) being integrally bonded together and the non-swellable rubbery layer serving to prevent the expansion of the water-swellable rubbery layer in directions other than the direction perpendicular to the plane of the layers.

Claim 2

Dependent Claim 84 words

Claim 3

Dependent Claim 21 words

A water-swellable caulking material as claimed in Claim 1 wherein the rubber forming the water-swellable rubbery layer is a 1,3-diene rubber.

Claim 4

Dependent Claim 30 words

A water-swellable caulking material as claimed in Claim 2 wherein the 1,3-diene rubber is a rubber containing from 5 to 50 of crystalline regions or glassy regions at room temperature

Claim 5

Dependent Claim 20 words

A water-swellable caulking material as claimed in Claim 2 or Claim 3 wherein the 1,3-diene rubber is a chloroprene rubber.

Claim 6

Dependent Claim 81 words

A water-swellable caulking material as claimed in any one of Claims 1 to 4 wherein the highly water absorbing resin is a crosslinked material obtained by cross-linking the reaction product of (a) a polymer containing a monomeric constituent which is an α,β -unsaturated compound having one or two groups or groups convertible to carboxyl groups, and (b) a basic substance which is an alkali metal compound, alkaline earth metal compound, ammonia or a monoamines, by the use of a cross-linking agent.

Claim 7

Dependent Claim 65 words

A water-swellable caulking material as claimed in any one of Claims 1 to 4 wherein the highly water absorbing resin is a cross-linked material obtained by cross-linking the reaction product of (a) a copolymer of an α-olefin and maleic anhydride, and (b) a basic substance which is an alkali metal compound, alkaline earth metal compound, ammonia or a monoamine, by use of a cross-linking agent.

Claim 8

Dependent Claim 14 words

A water-swellable caulking material as claimed in Claim 6 wherein the α-olefin is isobutylene.

Claim 9

Dependent Claim 89 words

8:: A water-swellable caulking material as claimed in any one of Claims 1 to 4 wherein the highly water absorbing resin is a cross-linked material obtained by cross-linking the reaction product of (a) a copolymer of maleic anhydride and a vinyl or vinylidene compound which is styrene, vinyl acetate, methylvinyl either, or ester of acrylic acid, an ester of methacrylic acid or acrylonitrile, and (b) a basic substance which is an alkali metal compound, alkaline earth metal compound, ammonia or a monoamine, by the use of a cross-linking agent.

Claim 10

Dependent Claim 65 words

A water-swellable caulking material as claimed in any one of Claims 1 to 4 wherein the highly water absorbing resin is a cross-linked material obtained by cross-linking the reaction product of (a) a polymer of acrylic acid or methacrylic acid, and (b) a basic substance which is an alkali metal compound, alkaline earth metal compound, amminia or a monoamine,. by use of a cross-linking agent.

Claim 11

Dependent Claim 45 words

A water-swellable caulking material as claimed in any one of the preceding claims wherein the highly water absorbing resin has a ratio of water absorption in the range from 20 to 500 times by weight when swollen in water, based on the dry weight thereof.

Claim 12

Dependent Claim 57 words

A water-swellable caulking material as claimed in any one of the preceding claims wherein the water-swellable rubbery layer containing the highly water absorbing resin dispersed in the matrix of the rubber is a shaped article comprising from 10 to 300 parts by weight of the highly water absorbing resin per 100 parts by weight of the rubber.

Claim 13

Dependent Claim 50 words

A water-swellable caulking material as claimed in any one of the preceding claims wherein the rubbery layer which does not swell in water is formed from a shaped article of .a_vulcanized or unvulcanized rubber having a tensile stress in the range from 20 to 200 kg/cm 2 at 300% elongation.

Claim 14

Dependent Claim 70 words

A water-swellable caulking material as claimed in any one of the preceding claims wherein the rubbery layer which does not swell in water is formed from a shaped article of at least one rubber selected from natrual rubbers, synthetic cis-l,4-polyisoprene rubbers, polybutadiene rubbers, copolymeric rubbers of styrene and a diene, copolymeric rubbers of acrylonitrile and a diene, butyl rubbers, chloroprene rubbers and terpolymeric rubbers of ethylene, propylene and a diene.

Claim 15

Dependent Claim 71 words

A water swellable caulking material as claimed in any one of the preceding claims wherein the composite body is a three-layered structure composed of two layers of the water-swellable rubbery composition (A) integrally sandwiching between them a layer of the non-swellable rubbery material (B), the volume ratio (A/B) of the water-swellable layers (A) to the non-swellable layer (B) being in the range of from 15 : 85 to 85 : 15.

Claim 16

Dependent Claim 63 words

A water-swellable caulking material as claimed in Claim 1 wherein the composite body is a three-layered stratified body composed of a rubbery layer not swellable in water integrally sandwiched together by two water-swellable rubbery layers, the volume ratio of the water-swellable rubbery layers to the rubbery layer not swellable in water being in the range from 15 : 85 to 85 : 15.

References Cited (Backward Citations)

US2156681A Cited

JPS53143653A Cited

JPS547463A Cited

JPS547461A Cited

JPS5420066A Cited

DE2855691A1 Cited

JPS5494525A Cited

JPS54110262A Cited

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