US4271272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane sponges manufactured with additive dispersed therein
Assignee: SHERWOOD RESEARCH AND DEVELOPMENT PARTNERSHIP A OF NJ LP
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Filing: 1978-10-30
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Granted: 1981-06-02
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Expires: 1998-10-30
Abstract
Abstract This disclosure teaches synthetic polyurethane sponges manufactured with at least 4% of one or more additives dispersed therein. The additives may be soap, lotions, detergents, pesticides, lanolin, scouring particles, silicone oils, bath oils, or the like or combinations thereof. The sponges' skeletons are developed by reaction of a polyether or a polyester with a suitable isocyanate in the presence of a catalyst with the additives entrapped in voids of the sponges. An additive bearing material, i.e. a carrier material containing the additive is prepared. The carrier material is then mixed into a foam forming reaction mass. By this expedient the additive does not impair desired foam formation. The sponges are provided with high liquid absorbency and fine "hand" by virtue of manufacturing methods and specific catalysts employed.
Inventors
- 👤 Robert L. Strickman
- 👤 Melvyn B. Strickman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:59
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/04; C11D17/049; A; A47; A47K; A47K7/00; A47K7/02; A47K7/03; A47L; A47L13/00; A47L13/10; A47L13/16; A47L13/17; A61; A61K; A61K8/00; A61K8/02; A61K8/0208; A61K8/18; A61K8/72; A61K8/84; A61K8/87; A61Q; A61Q19/00; A61Q19/10; C08; C08J; C08J9/00; A61K2800/00; A61K2800/20; A61K2800/28; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S521/00; Y10S521/905
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
83 words
A resilient polyurethane foam sponge product comprising an amount of a lotion of at least 4 percent by weight of the product sponge dispersed uniformly within the cellular structure of the synthetic polyurethane sponge, said sponge product produced by reaction of a component selected from the group consisting of polyesters and polyethers with an organic polyisocyanate in the presence of a catalyst to obtain a foam forming mass, the lotion being dispersed in the reaction mass prior to the onset of foam formation.
Claim 2
Dependent Claim
83 words
A resilient polyurethane foam sponge product comprising an amount of a lotion of at least 4 percent by weight of the product sponge dispersed uniformly within the cellular structure of the synthetic polyurethane sponge, said sponge product produced by reaction of a component selected from the group consisting of polyesters and polyethers with an organic polyisocyanate in the presence of a catalyst to obtain a foam forming mass, the lotion being dispersed in the reaction mass prior to the onset of foam formation.
Claim 3
Dependent Claim
12 words
The product of claim 1 wherein the lotion is a silicone-containing material.
Claim 4
Dependent Claim
21 words
The product of claim 2 wherein the silicone-containing material comprises between 10 and 20 percent by weight of the product sponge.
Claim 5
Dependent Claim
83 words
A resilient polurethane foam sponge product comprising an amount of a pesticide of at least 4 percent by weight of the product sponge dispersed uniformly within the cellular structure of the synthetic polyurethane sponge, said sponge product produced by reaction of a component selected from the group consisting of polyesters and polyethers with an organic polyisocyanate in the presence of a catalyst to obtain a foam forming mass, the pesticide being dispersed in the reaction mass prior to the onset of foam formation.
Claim 6
Dependent Claim
83 words
A resilient polurethane foam sponge product comprising an amount of a pesticide of at least 4 percent by weight of the product sponge dispersed uniformly within the cellular structure of the synthetic polyurethane sponge, said sponge product produced by reaction of a component selected from the group consisting of polyesters and polyethers with an organic polyisocyanate in the presence of a catalyst to obtain a foam forming mass, the pesticide being dispersed in the reaction mass prior to the onset of foam formation.
Claim 7
Dependent Claim
85 words
A resilient polyurethane foam sponge product comprising an amount of a bath oil of at least 4 percent by weight of the product sponge dispersed uniformly within the cellular structure of the synthetic polyurethane sponge, said sponge product produced by reaction of a component selected from the group consisting of polyesters and polyethers with an organic polyisocyanate in the presence of a catalyst to obtain a foam forming mass, the bath oil being dispersed in the reaction mass prior to the onset of foam formation.
Claim 8
Dependent Claim
85 words
A resilient polyurethane foam sponge product comprising an amount of a bath oil of at least 4 percent by weight of the product sponge dispersed uniformly within the cellular structure of the synthetic polyurethane sponge, said sponge product produced by reaction of a component selected from the group consisting of polyesters and polyethers with an organic polyisocyanate in the presence of a catalyst to obtain a foam forming mass, the bath oil being dispersed in the reaction mass prior to the onset of foam formation.
Claim 9
Dependent Claim
30 words
The product of claim 5 wherein the bath oil is selected from the group consisting of acetylated lanolin, acetylated lanolin alcohol, isopropyl myristate, mineral oil and compatible combinations of same.
Claim 10
Dependent Claim
33 words
The product of claim 1, 4 or 5 wherein the additives of said claims are first distributed within a dry, vehicular material before incorporation into the reaction mass, the vehicular material being soap.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-01 | 1984-12-01 | 1985-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-01 | 1988-12-01 | 1989-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-01 | 1992-12-01 | 1993-06-02 | $7700.00 | Window Closed / Lapsed |