US4616043A
Expired / Lapsed
US
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Aliphatic polyurethane sprayable coating compositions and method of preparation
Assignee: LINAMAR MACHINE Ltd
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Filing: 1985-04-26
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Granted: 1986-10-07
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Expires: 2005-04-26
Abstract
Abstract A light stable, fast reacting, aliphatic polyurethane sprayable coating composition and injectable open molding material is prepared by reacting an A side composition comprising a trimerized or biuret polymethylene polyisocyanate prepolymer with a B side composition comprising an admixture of an alkoxy polyalkylene glycol, such as methoxypolyethylene glycol and an aromatic polyamine such as a diethyl toluene diamine to provide a polyurethane reaction product which rapidly gels, may be quickly removed from the mold, has good green strength and high temperature resistance and is characterized by good ultraviolet or light stability properties. Optionally, the B side composition may contain a catalytic amount of a metal carboxylate like lead napthenate. The A and B side compositions may be sprayed onto a mat in an open mold and also may be sprayed in conjunction with chopped glass fibers, to form a glass-fiber spray coating.
Inventors
- 👤 Stuart B. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:23
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/2805; C08G18/2815; C08G18/283; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/26; C03C25/32; C03C25/326; C08G18/08; C08G18/0895; C08G18/16; C08G18/22; C08G18/26; C08G18/30; C08G18/32; C08G18/3225; C08G18/3237; C08G18/324; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/7806; C08G18/7818; C08G18/7831; C08G18/79; C08G18/791; C08G18/792; C08G2120/00; C08G2150/00; C08G2150/50
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
125 words
A process for preparing a light stable, fast reacting, aliphatic polyurethane product, which process comprises admixing and reacting an A side and a B side composition as a reaction mixture, the A side composition comprising 100 parts of a trimerized or biuret polymethylene polyisocyanate prepolymer having free NCO groups and a B side component composition comprising an admixture of an alkoxy polyalkylene glycol and an aromatic diamine, wherein the aromatic diamine is present in a chain-extending amount of from about 10 to 50 parts by weight per 100 parts by weight of the prepolymer, and the alkoxy polyalkylene glycol is present in an amount of from about 10 to 150 parts by weight of the prepolymer, to provide a fast reacting, aliphatic polyurethane reaction product.
Claim 2
Dependent Claim
125 words
A process for preparing a light stable, fast reacting, aliphatic polyurethane product, which process comprises admixing and reacting an A side and a B side composition as a reaction mixture, the A side composition comprising 100 parts of a trimerized or biuret polymethylene polyisocyanate prepolymer having free NCO groups and a B side component composition comprising an admixture of an alkoxy polyalkylene glycol and an aromatic diamine, wherein the aromatic diamine is present in a chain-extending amount of from about 10 to 50 parts by weight per 100 parts by weight of the prepolymer, and the alkoxy polyalkylene glycol is present in an amount of from about 10 to 150 parts by weight of the prepolymer, to provide a fast reacting, aliphatic polyurethane reaction product.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein the polymethylene polyisocyanate comprises a hexamethylene diisocyanate prepolymer.
Claim 4
Dependent Claim
14 words
The process of claim 1 wherein the aromatic diamine comprises a dialkyl toluene diamine.
Claim 5
Dependent Claim
14 words
The process of claim 1 wherein the aromatic diamine comprises a diethyl toluene diamine.
Claim 6
Dependent Claim
17 words
The process of claim 1 wherein the alkoxy polyalkylene glycol comprises a methoxypolyethylene glycol or methoxypolypropylene glycol.
Claim 7
Dependent Claim
21 words
The process of claim 1 which includes adding to the reaction mixture a flame retardant amount of a flame retardant agent.
Claim 8
Dependent Claim
32 words
The process of claim 6 wherein the flame retardant agent comprises a flame retardant compound selected from the group consisting of a halogenated compound, a phosphate compound or a halogenated phosphate compound.
Claim 9
Dependent Claim
28 words
The process of claim 1 which includes adding to the reaction mixture a blowing amount of a blowing agent and a surfactant to provide a foam reaction product.
Claim 10
Dependent Claim
31 words
The process of claim 1 wherein the alkoxy polyalkylene glycol comprises methoxypolyethylene glycol in an amount ranging from about 20 to 80 parts by weight per 100 parts of the prepolymer.
Claim 11
Dependent Claim
18 words
The process of claim 1 wherein the B side composition includes a catalytic amount of a metal carboxylate.
Claim 12
Dependent Claim
28 words
The process of claim 10 wherein the metal carboxylate comprises lead napthenate in an amount of 0.01 to 1.0 parts by weight per 100 parts of the prepolymer.
Claim 13
Dependent Claim
20 words
The process of claim 1 wherein the A side composition includes a viscosity reducing amount of a polyalkylene glycol acetate.
Claim 14
Dependent Claim
32 words
The process of claim 12 wherein the polyalkylene glycol acetate comprises tripropylene glycol acetate in an amount to reduce the viscosity of the A side composition to about 2500 cps or less.
Claim 15
Dependent Claim
35 words
The process of claim 1 wherein the reaction product gels in less than about 20 seconds and which has good green strength and which may be removed from a mold within 5 minutes or less.
Claim 16
Dependent Claim
25 words
The process of claim 1 which includes reacting composition A and composition B together by spraying composition A and B together onto a substrate surface.
Claim 17
Dependent Claim
21 words
The process of claim 15 which includes incorporating into the sprayed reaction mixture a fiber strengthening amount of a fibrous material.
Claim 18
Dependent Claim
13 words
The process of claim 16 wherein the fibrous material comprises chopped glass fibers.
Claim 19
Dependent Claim
28 words
The process of claim 1 which includes reacting composition A and composition B together by spraying compositions A and B together onto the surface of an open mold.
Claim 20
Dependent Claim
10 words
The reaction product produced by the process of claim 1.
Claim 21
Dependent Claim
10 words
The reaction product produced by the process of claim 15.
Claim 22
Dependent Claim
133 words
A process for preparing a light stable, fast reacting, aliphatic polyurethane reaction product, which process comprises admixing and reacting together an A side composition comprising 100 parts by weight of a trimerized or biuret hexamethylene diisocyanate prepolymer having up to about 35 percent by weight of free NCO groups with a B side composition comprising an admixture of a methoxypolyethylene glycol and an aromatic diamine, wherein the aromatic diamine is present in a chain-extending amount of from about 10 to 50 parts by weight per 100 parts by weight of the prepolymer, and the alkoxy polyalkylene glycol is present in an amount of from about 10 to 150 parts by weight of the prepolymer, to provide a polyurethane reaction product which gels in less than about 20 seconds and has good green strength.
Claim 23
Dependent Claim
133 words
A process for preparing a light stable, fast reacting, aliphatic polyurethane reaction product, which process comprises admixing and reacting together an A side composition comprising 100 parts by weight of a trimerized or biuret hexamethylene diisocyanate prepolymer having up to about 35 percent by weight of free NCO groups with a B side composition comprising an admixture of a methoxypolyethylene glycol and an aromatic diamine, wherein the aromatic diamine is present in a chain-extending amount of from about 10 to 50 parts by weight per 100 parts by weight of the prepolymer, and the alkoxy polyalkylene glycol is present in an amount of from about 10 to 150 parts by weight of the prepolymer, to provide a polyurethane reaction product which gels in less than about 20 seconds and has good green strength.
Claim 24
Dependent Claim
13 words
The process of claim 21 wherein the aromatic diamine comprises diethyl toluene diamine.
Claim 25
Dependent Claim
23 words
The process of claim 21 wherein the methoxypolyethylene glycol comprises from about 20 to 80 parts per 100 parts of the trimerized prepolymer.
Claim 26
Dependent Claim
29 words
The process of claim 21 wherein the A side composition includes from about 5 to 40 parts by weight per 100 parts of the prepolymer of tripropylene glycol acetate.
Claim 27
Dependent Claim
32 words
The process of claim 21 wherein the B side composition includes from about 0.01 to 1.0 parts by weight of a lead carboxylate catalyst per 100 parts by weight of the prepolymer.
Claim 28
Dependent Claim
33 words
The process of claim 21 which includes spraying compositions A and B together onto a glass fiber mat on an open mold substrate and removing the glass fiber-containing reactive product from the mold.
Claim 29
Dependent Claim
10 words
The reaction product prepared by the process of claim 21.
References Cited (Backward Citations)
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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) | 1989-10-06 | 1990-04-07 | 1990-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-06 | 1994-04-07 | 1994-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-06 | 1998-04-07 | 1998-10-07 | $7700.00 | Window Closed / Lapsed |