US4327013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly(acrylate) containing compositions and process for producing molded articles
Assignee: Union Carbide Corp
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Filing: 1980-03-27
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Granted: 1982-04-27
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Expires: 2000-03-27
Abstract
Abstract This invention is directed to a curable molding composition which comprises a mixture of (a) one or more fibers with a melting point or a glass transition temperature above about 130° C., (b) a poly(acrylate) characterized by the following empirical formula: ##STR1## wherein R is the hydroxy-free residue of an organic polyhydric alcohol which contained alcoholic hydroxyl groups bonded to different carbon atoms, R 1 and R 2 are independently hydrogen or methyl, n is 1 to 3 (c) an ethylenically unsaturated monomer which is soluble in and copolymerizable with (b), and (d) an elevated temperature free-radical curing catalyst capable of affecting the co-reaction of (b) with (c), said mixture containing (i) from about 15 to about 80 weight percent of (a), (ii) from about 5 to about 60 weight percent of (b), and (iii) from about 5 to about 60 weight percent of (c), and (iv) from about 0.2 to about 3 weight percent of (d), and wherein (b) plus (c) has a viscosity of from about 1 to about 50 centipoise. Additionally this invention concerns a process for producing high performance reinforced thermoset molded articles. The process comprises (I) forming a mixture of said composition, (II) providing said composition into a heatable mold and (III) molding said mixture at a temperature sufficient to cause the initiation of the co-reaction of (b) with (c) at a temperature not greater than 150° C. and (IV) completing said molding in less than 6 minutes from the time of initiation of said co-reaction.
Inventors
- 👤 Edward N. Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:17
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08F; C08F222/00; C08F222/10; C08F222/1006; C08F222/102; C08F222/1025; C08J5/24; C08J5/241; C08J5/243; C08J5/244; C08J5/246; G; G02; G02B; G02B6/00; G02B6/02; G02B6/02033; C08J2357/00; C08J2357/06; C08J2357/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
184 words
A molding composition for producing fiber reinforced molded articles comprising: (A) a curable resin portion containing: (i) from 5 to about 60 weight percent of a poly(acrylate) characterized by the following empirical formula: ##STR5## wherein R is the hydroxyl-free residue of an organic polyhydric alcohol which contained hydroxyl groups bonded to different carbon atoms, R 1 and R 1 are independently hydrogen or methyl, and n is 1 to 3, (ii) from about 5 to about 60 weight percent of a monoethylenically unsaturated monomer which is soluble in and copolymerizable with (i), wherein (i) plus (ii) have a viscosity of from about 1 to about 50 centipoise, (iii) from about 0.2 to about 3 weight percent of an elevated temperature free-radical curing catalyst capable of effecting the coreaction of (i) and (ii), and (B) one or more reinforcing fibers with a melting point or a glass transition temperature above about 130° C., wherein said fibers are present in amounts of from about 15 to about 80 weight percent; said weight percents in (A) and (B) being based on the total weight of the composition.
Claim 2
Dependent Claim
184 words
A molding composition for producing fiber reinforced molded articles comprising: (A) a curable resin portion containing: (i) from 5 to about 60 weight percent of a poly(acrylate) characterized by the following empirical formula: ##STR5## wherein R is the hydroxyl-free residue of an organic polyhydric alcohol which contained hydroxyl groups bonded to different carbon atoms, R 1 and R 1 are independently hydrogen or methyl, and n is 1 to 3, (ii) from about 5 to about 60 weight percent of a monoethylenically unsaturated monomer which is soluble in and copolymerizable with (i), wherein (i) plus (ii) have a viscosity of from about 1 to about 50 centipoise, (iii) from about 0.2 to about 3 weight percent of an elevated temperature free-radical curing catalyst capable of effecting the coreaction of (i) and (ii), and (B) one or more reinforcing fibers with a melting point or a glass transition temperature above about 130° C., wherein said fibers are present in amounts of from about 15 to about 80 weight percent; said weight percents in (A) and (B) being based on the total weight of the composition.
Claim 3
Dependent Claim
18 words
The composition of claim 1 wherein the fibers are selected from fiberglass, carbon fibers, and aromatic polyamide fibers.
Claim 4
Dependent Claim
12 words
The composition of claim 1 wherein the ethylenically unsaturated monomer is styrene.
Claim 5
Dependent Claim
11 words
A cured molded article formed from the composition of claim 1.
Claim 6
Dependent Claim
10 words
The composition of claim 1 wherein the fiber is fiberglass.
Claim 7
Dependent Claim
11 words
The composition of claim 1 wherein the fiber is carbon fiber.
Claim 8
Dependent Claim
12 words
The composition of claim 1 wherein the fiber is aromatic polyamide fibers.
Claim 9
Dependent Claim
12 words
The composition of claim 1 wherein the poly(acrylate) is ethoxylated bisphenol-A dimethacrylate.
Claim 10
Dependent Claim
12 words
The composition of claim 1 wherein the poly(acrylate) is tetraethylene glycol dimethacrylate.
Claim 11
Dependent Claim
12 words
The composition of claim 1 wherein the poly(acrylate) is triethylene glycol dimethacrylate.
Claim 12
Dependent Claim
12 words
The composition of claim 1 wherein the poly(acrylate) is diethylene glycol dimethacrylate.
Claim 13
Dependent Claim
20 words
The composition of claim 1 wherein (b) plus (c) has a viscosity of from about 1 to about 10 centipoise.
Claim 14
Dependent Claim
245 words
A process for producing high performance fiber reinforced thermoset molded articles which comprises: (I) forming a mixture of: (A) a curable resin portion containing: (i) from 5 to about 60 weight percent of a poly(acrylate) characterized by the following empirical formula: ##STR6## wherein R is the hydroxyl-free residue of an organic polyhydric alcohol which contained hydroxyl groups bonded to different carbon atoms, R 1 and R 2 are independently hydrogen or methyl, and n is 1 to 3, (ii) from about 5 to about 60 weight percent of a monoethylenically unsaturated monomer which is soluble in and copolymerizable with (i), wherein (i) plus (ii) have a viscosity of from about 1 to about 50 centipoise, (iii) from about 0.2 to about 3 weight percent of an elevated temperature free-radical curing catalyst capable of effecting the co-reaction of (i) and (ii), and (B) one or more reinforcing fibers with a melting point or a glass transition temperature above about 130° C., wherein said fibers are present in amounts of from about 15 to about 80 weight percent; said weight percents in (A) and (B) being based on the total weight of the composition, (II) providing said mixture into a heatable mold, (III) molding said mixture at a temperature sufficient to cause the initiation of the co-reaction of (i) and (ii) at a temperature not greater than 150° C. and (IV) completing said molding in less than 6 minutes from the time of initiation of said co-reaction.
Claim 15
Dependent Claim
245 words
A process for producing high performance fiber reinforced thermoset molded articles which comprises: (I) forming a mixture of: (A) a curable resin portion containing: (i) from 5 to about 60 weight percent of a poly(acrylate) characterized by the following empirical formula: ##STR6## wherein R is the hydroxyl-free residue of an organic polyhydric alcohol which contained hydroxyl groups bonded to different carbon atoms, R 1 and R 2 are independently hydrogen or methyl, and n is 1 to 3, (ii) from about 5 to about 60 weight percent of a monoethylenically unsaturated monomer which is soluble in and copolymerizable with (i), wherein (i) plus (ii) have a viscosity of from about 1 to about 50 centipoise, (iii) from about 0.2 to about 3 weight percent of an elevated temperature free-radical curing catalyst capable of effecting the co-reaction of (i) and (ii), and (B) one or more reinforcing fibers with a melting point or a glass transition temperature above about 130° C., wherein said fibers are present in amounts of from about 15 to about 80 weight percent; said weight percents in (A) and (B) being based on the total weight of the composition, (II) providing said mixture into a heatable mold, (III) molding said mixture at a temperature sufficient to cause the initiation of the co-reaction of (i) and (ii) at a temperature not greater than 150° C. and (IV) completing said molding in less than 6 minutes from the time of initiation of said co-reaction.
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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) | 1985-04-26 | 1985-10-26 | 1986-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-26 | 1989-10-26 | 1990-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-26 | 1993-10-26 | 1994-04-27 | $7700.00 | Window Closed / Lapsed |