Poly(acrylate) containing compositions and process for producing molded articles
First Claim
1. 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, R1 and R1 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.
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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, R1 and R2 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.
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Citations
13 Claims
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1. A molding composition for producing fiber reinforced molded articles comprising:
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(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, R1 and R1 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. 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, R1 and R2 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.
Specification
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- Resources
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Current AssigneeUnion Carbide Corporation (Dow, Inc.)
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Original AssigneeUnion Carbide Corporation (Dow, Inc.)
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InventorsPeters, Edward N.
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Primary Examiner(s)Jacobs, Lewis T.
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Application NumberUS06/129,883Time in Patent Office761 DaysField of Search260/42.17, 260/42.18, 260/42.52, 525/426US Class Current524/538CPC Class CodesC08F 222/1025 of aromatic dialcoholsC08J 2357/10 containing oxygen atomsC08J 5/04 Reinforcing macromolecular ...C08J 5/243 using carbon fibresC08J 5/244 using glass fibresC08J 5/246 using polymer based synthet...G02B 6/02033 Core or cladding made from ...
