US4525890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paintbrush embedment compound and paintbrush construction and method embodying same
Assignee: Henkel Corp
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Filing: 1983-03-04
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Granted: 1985-07-02
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Expires: 2003-03-04
Abstract
Abstract An embedment compound for a paintbrush or the like, together with a paintbrush construction and method of manufacture embodying the improved embedment compound. The embedment compound is a polyurethane composition having a crosslink density sufficient to render such compound acceptably resistant to all paint solvents. For example, a typical embodiment composition comprises a blend of Mondur MR with a prepolymer prepared from Pluracol TP-440 and Isonate 143L, and the blend cured at 100° C. overnight.
Inventors
- 👤 Dwight E. Peerman
- 👤 H. Gorden Kanten
- 👤 Kelvin K. Bonnema
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:31
CPC Classifications
C; C09; C09J; C09J175/00; C09J175/04; A; A46; A46B; A46B3/00; A46B3/02; A46B3/08; A46B3/10; A46B3/12
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
78 words
An embedment compound for a paintbrush or the like of the type which includes a plurality of bristles, a handle portion and an intermediate portion disposed between said bristles and said handle portion, said embedment compound functioning to bond said bristles to one another and to said intermediate portion and comprising: a highly crosslinked polyurethane composition wherein said polyurethane composition has a calculated crosslink density of at least 15 crosslinks per 10,000 cubic centimeters of cured polyurethane composition.
Claim 2
Dependent Claim
78 words
An embedment compound for a paintbrush or the like of the type which includes a plurality of bristles, a handle portion and an intermediate portion disposed between said bristles and said handle portion, said embedment compound functioning to bond said bristles to one another and to said intermediate portion and comprising: a highly crosslinked polyurethane composition wherein said polyurethane composition has a calculated crosslink density of at least 15 crosslinks per 10,000 cubic centimeters of cured polyurethane composition.
Claim 3
Dependent Claim
28 words
The embedment compound of claim 1 wherein said polyurethane composition has a calculated crosslink density of at least 25 crosslinks per 10,000 cubic centimeters of cured polyurethane composition.
Claim 4
Dependent Claim
22 words
The embedment compound of claim 1 wherein said polyurethane composition has an embedment viscosity of between about 2000 cps and 5000 cps.
Claim 5
Dependent Claim
23 words
The embedment compound of claim 1 wherein the cured polyurethane composition has a hardness of at least 50 on the Shore D scale.
Claim 6
Dependent Claim
20 words
The embedment compound of claim 1 wherein the polyol component of said polyurethane composition has a functionality greater than 2.
Claim 7
Dependent Claim
45 words
The embedment compound of claim 5 wherein the polyol component of said polyurethane composition is selected from one or more of the group consisting of: polycaprolactone polyols, polyether polyols, polyester polyols, sucrose initiated polyols, pentaerythritol initiated polyols, amino polyols, aromatic amine polyols and hydroxymethyl octadecanols.
Claim 8
Dependent Claim
21 words
The embedment compound of claim 5 wherein the isocyanate component of said polyurethane composition has a functionality of at least 2.
Claim 9
Dependent Claim
31 words
The embedment compound of claim 7 wherein the isocyanate component of said polyurethane is selected from one or more of the group consisting of: polymeric MDI, modified MDI and toluene diisocyanate.
Claim 10
Dependent Claim
24 words
The embedment compound of claim 1 wherein said polyurethane composition has a crosslink density sufficient to render it acceptably resistant to all paint solvents.
Claim 11
Dependent Claim
112 words
A paintbrush or the like comprising: a generally tubular ferrule having a top end and a bottom end; a plurality of bristles supported within said ferrule near its bottom end with a portion of said plurality of bristles extending internally within said ferrule; a bristle embedment compound comprising a highly crosslinked polyurethane composition, wherein said polyurethane composition has a calculated crosslink density of at least 15 crosslinks per 10,000 cubic centimeter of cured polyurethane composition, disposed within said ferrule and penetrating a portion of said bristles to bond said bristles to one another and to said ferrule; and a handle secured to and extending outwardly from the top end of said ferrule.
Claim 12
Dependent Claim
112 words
A paintbrush or the like comprising: a generally tubular ferrule having a top end and a bottom end; a plurality of bristles supported within said ferrule near its bottom end with a portion of said plurality of bristles extending internally within said ferrule; a bristle embedment compound comprising a highly crosslinked polyurethane composition, wherein said polyurethane composition has a calculated crosslink density of at least 15 crosslinks per 10,000 cubic centimeter of cured polyurethane composition, disposed within said ferrule and penetrating a portion of said bristles to bond said bristles to one another and to said ferrule; and a handle secured to and extending outwardly from the top end of said ferrule.
Claim 13
Dependent Claim
27 words
The paintbrush of claim 10 wherein said polyurethane composition has a calculated crosslink density of at least 25 crosslinks per 10,000 cubic centimeters of cured polyurethane composition.
Claim 14
Dependent Claim
21 words
The paintbrush of claim 10 wherein said polyurethane composition has a hardness of at least 50 on the Shore D scale.
Claim 15
Dependent Claim
19 words
The paintbrush of claim 10 wherein the polyol component of said polyurethane composition has a functionality greater than 2.
Claim 16
Dependent Claim
44 words
The paintbrush of claim 13 wherein the polyol component of said polyurethane composition is selected from one or more of the group consisting of: polycaprolactone polyols, polyether polyols, polyester polyols, sucrose initiated polyols, pentaerythritol initiated polyols, amino polyols, aromatic amine polyols and hydroxymethyl octadecanols.
Claim 17
Dependent Claim
20 words
The paintbrush of claim 13 wherein the isocyanate component of said polyurethane composition has a functionality of at least 2.
Claim 18
Dependent Claim
30 words
The paintbrush of claim 15 wherein the isocyanate component of said polyurethane is selected from one or more of the group consisting of: polymeric MDI, modified MDI and toluene diisocyanate.
Claim 19
Dependent Claim
23 words
The paintbrush of claim 10 wherein said polyurethane composition has a crosslink density sufficient to render it acceptably resistant to all paint solvents.
Claim 20
Independent Claim
93 words
A method of manufacturing a paintbrush or the like of the type having a plurality of bristles, a handle and an intermediate portion disposed between said handle and bristles comprising the steps of: supporting a plurality of bristles with respect to said intermediate portion; bonding said plurality of bristles to one another and to said intermeditae portion with an effective quantity of an embedment compound comprising a highly crosslinked polyurethane adhesive, wherein said polyurethane composition has a calculated crosslink density of at least 15 crosslinks per 10,000 cubic centimeters of cured polyurethane composition.
Claim 21
Independent Claim
93 words
A method of manufacturing a paintbrush or the like of the type having a plurality of bristles, a handle and an intermediate portion disposed between said handle and bristles comprising the steps of: supporting a plurality of bristles with respect to said intermediate portion; bonding said plurality of bristles to one another and to said intermeditae portion with an effective quantity of an embedment compound comprising a highly crosslinked polyurethane adhesive, wherein said polyurethane composition has a calculated crosslink density of at least 15 crosslinks per 10,000 cubic centimeters of cured polyurethane composition.
Claim 22
Dependent Claim
54 words
The method of claim 18 wherein said intermediate portion includes a generally tubular ferrule and said method includes supporting said bristles within one end of said ferrule and injecting an effective quantity of said embedment compound into the other end of said ferrule and allowing the same to penetrate a desired distance during curing.
Claim 23
Dependent Claim
27 words
The method of claim 19 wherein said polyurethane composition has a calculated crosslink density of at least 25 crosslinks per 10,000 cubic centimeters of cured polyurethane composition.
Claim 24
Dependent Claim
23 words
The method of claim 19 including preparing a prepolymer of said embedment compound having a viscosity between about 2500 cps and 10,000 cps.
Claim 25
Dependent Claim
35 words
The method of claim 19 including preparing a blend of two or more polyols having a blended viscosity of between about 2500 cps and 10,000 cps to form the polyol component of said polyurethane composition.
References Cited (Backward Citations)
US2274002A
Cited
US2648861A
Cited
US2664582A
Cited
US2880192A
Cited
US3248373A
Cited
US3142081A
Cited
US3386119A
Cited
US3701374A
Cited
US3819779A
Cited
US4125545A
Cited
US4194940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-01 | 1988-12-31 | 1989-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-01 | 1992-12-31 | 1993-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-01 | 1996-12-31 | 1997-07-02 | $7700.00 | Window Closed / Lapsed |