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US4395529A
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Coating powders for protective films based on epsilon-caprolactam blocked isocyanates
Assignee: Cargill Inc
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Filing: 1981-07-20
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Granted: 1983-07-26
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Expires: 2001-07-20
Abstract
Abstract This invention describes a coating composition and method for producing such composition wherein the composition includes an E-caprolactam blocked polyisocyanate including a diisocyanate selected from the group consisting of 1,4-bis (isocyanatomethyl) cyclohexane and 1,3-bis (isocyanatomethyl) cyclohexane; and a film forming hydroxy containing organic polymer.
Inventors
- 👤 K. A. Pai Panandiker
- 👤 Charles Danick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:01
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/70; C08G18/72; C08G18/74; C08G18/75; C08G18/751; C08G18/752; C08G18/757; C08G18/80; C08G18/8061; C08G18/807; C08G18/8074; C08G2150/00; C08G2150/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
82 words
A coating composition which comprises a molar mixture of E-caprolactam blocked polyisocyanate and E-caprolactam blocked diisocyanate in a ratio in a range of about 1:0 to about 1:1.5, said blocked polyisocyanate comprising the reaction product of a polyhydric compound and a diisocyanate, said diisocyanate being selected from the group consisting of 1,4-bis(isocyanatomethyl)cyclohexane, 1,3-bis(isocyanatomethyl)cyclohexane and mixtures thereof, said polyhydric compound being selected from the group consisting of trimethylol propane, trimethylol ethane, glycerine, E-caprolactone, and mixtures thereof; and a film forming hydroxy containing polyester.
Claim 2
Dependent Claim
82 words
A coating composition which comprises a molar mixture of E-caprolactam blocked polyisocyanate and E-caprolactam blocked diisocyanate in a ratio in a range of about 1:0 to about 1:1.5, said blocked polyisocyanate comprising the reaction product of a polyhydric compound and a diisocyanate, said diisocyanate being selected from the group consisting of 1,4-bis(isocyanatomethyl)cyclohexane, 1,3-bis(isocyanatomethyl)cyclohexane and mixtures thereof, said polyhydric compound being selected from the group consisting of trimethylol propane, trimethylol ethane, glycerine, E-caprolactone, and mixtures thereof; and a film forming hydroxy containing polyester.
Claim 3
Dependent Claim
36 words
A coating composition as recited in claim 1 wherein said mixture has free NCO of less than 0.8 percent by weight and an ICI melt viscosity of about 6 to about 20 poise at 175° C.
Claim 4
Dependent Claim
24 words
A coating composition as recited in claim 1 wherein said polyester is a reaction product of neopentyl glycol, cyclohexandimethanol, trimethylol propane and terephthalic acid.
Claim 5
Dependent Claim
23 words
A coating composition as recited in claim 1 wherein said polyester has an ICI melt viscosity of about 15 to about 20 poise.
Claim 6
Dependent Claim
31 words
A coating composition as recited in claim 1 wherein said mixture of E-caprolactam blocked polyisocyanate and blocked diisocyanate has an equivalent weight in the range from about 280 to about 320.
Claim 7
Dependent Claim
37 words
A coating composition as recited in claim 5 wherein said mixture of E-caprolactam blocked polyisocyanate and blocked diisocyanate is the reaction product of about 3.5 moles diisocyanate, about one mole trimethylol propane and about 4 moles E-caprolactam.
Claim 8
Dependent Claim
84 words
A coating composition which comprises: an E-caprolactam blocked polyisocyanate which is the reaction product of from about 3.0 to about 4.5 moles of a diisocyanate selected from the group consisting of 1,4-bis(isocyanatomethyl)cyclohexane, 1,3-bis(isocyanatomethyl)cyclohexane and mixtures thereof, about 1.0 mole of polyhydric compound per mole of isocyanate group, and from about 3.0 to about 6.0 moles of E-caprolactam: said polyhydric compound being selected from the group consisting of trimethylol propane, trimethylol ethane, glycerine, E-caprolactone, and mixtures thereof; of a film forming hydroxy containing a polyester.
Claim 9
Dependent Claim
84 words
A coating composition which comprises: an E-caprolactam blocked polyisocyanate which is the reaction product of from about 3.0 to about 4.5 moles of a diisocyanate selected from the group consisting of 1,4-bis(isocyanatomethyl)cyclohexane, 1,3-bis(isocyanatomethyl)cyclohexane and mixtures thereof, about 1.0 mole of polyhydric compound per mole of isocyanate group, and from about 3.0 to about 6.0 moles of E-caprolactam: said polyhydric compound being selected from the group consisting of trimethylol propane, trimethylol ethane, glycerine, E-caprolactone, and mixtures thereof; of a film forming hydroxy containing a polyester.
Claim 10
Independent Claim
92 words
A method for producing a coating composition comprising: reacting a reaction mixture comprising from about 3.0 to about 4.5 moles of a diisocyanate selected from the group consisting of 1,4-bis(isocyanatomethyl)cyclohexane, 1,3-bis(isocyanatomethyl)cyclohexane and mixtures thereof, about 1 mole of a polyhydric compound per mole of isocyanate group, said polyhydric compound being selected from the group consisting of trimethylol propane, trimethylol ethane, glycerine, E-caprolactone, and mixtures thereof, and from about 3.0 to about 6.0 moles E-caprolactam to form a block polyisocyanate component; mixing said blocked polyisocyanate compound with a film forming hydroxy containing polyester.
Claim 11
Independent Claim
92 words
A method for producing a coating composition comprising: reacting a reaction mixture comprising from about 3.0 to about 4.5 moles of a diisocyanate selected from the group consisting of 1,4-bis(isocyanatomethyl)cyclohexane, 1,3-bis(isocyanatomethyl)cyclohexane and mixtures thereof, about 1 mole of a polyhydric compound per mole of isocyanate group, said polyhydric compound being selected from the group consisting of trimethylol propane, trimethylol ethane, glycerine, E-caprolactone, and mixtures thereof, and from about 3.0 to about 6.0 moles E-caprolactam to form a block polyisocyanate component; mixing said blocked polyisocyanate compound with a film forming hydroxy containing polyester.
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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) | 1986-07-25 | 1987-01-24 | 1987-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-25 | 1991-01-24 | 1991-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-25 | 1995-01-24 | 1995-07-26 | $7700.00 | Window Closed / Lapsed |