US3873493A
Expired / Lapsed
US
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Process for making reinforced thermosets from epoxy-functional copolymers and crosslinking agents
Assignee: Ford Motor Co
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Filing: 1974-02-15
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Granted: 1975-03-25
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Expires: 1994-02-15
Abstract
Abstract An improved method for preparing reinforced thermosets employing epoxy-functional acrylic copolymers and crosslinking agents therefor which comprises forming a dry intimate, homogeneous, mixture of particulate solids which on a catalyst-free basis comprises an epoxy-functional copolymer of acrylic monomers of which glycidyl methacrylate is a constituent monomer, an organic crosslinking agent for said copolymer, and inorganic reinforcing material and which have average maximum particle diameter between about 5 and about 10 microns with less than 10 percent of said particles having maximum diameter above 25 microns and molding said mixture at a temperature in the range of about 300*-400* F. at a pressure in the range of about 500 to about 2,000 psi.
Inventors
- 👤 Santokh S Labana
- 👤 Ares N Theodore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:22
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08J; C08J5/00; C08J5/04; C08J2363/00; Y; Y10; Y10S; Y10S524/00; Y10S524/904
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
63 words
IN A METHOD FOR PRODUCING REINFORCED, THERMOSET RESIN ARTICLES OF MANUFACTURE WHEREIN A PARTICULATE MOLDABLE MATERIAL WHICH, ON A CATALYST AND FIBROUS MATERIAL-FREE BASIS, CONSISTS ESSENTIALLY OF AN EPOXY-FUNCTIONAL COPOLYMER OF ACRYLIC MONOMERS, ORGANIC CROSSLINKING AGENT FOR SAID COPOLYMER AND INORGANIC PARTICULATE SOLIDS AND HAS AN AVERAGE MAXIMUM PARTICLE DIAMETER ABOVE 10 MICRONS IS MOLDED AT ELEVATED TEMPERATURES AND PRESSURES, THE IMPROVEMENT WHEREIN:
Claim 2
Dependent Claim
63 words
IN A METHOD FOR PRODUCING REINFORCED, THERMOSET RESIN ARTICLES OF MANUFACTURE WHEREIN A PARTICULATE MOLDABLE MATERIAL WHICH, ON A CATALYST AND FIBROUS MATERIAL-FREE BASIS, CONSISTS ESSENTIALLY OF AN EPOXY-FUNCTIONAL COPOLYMER OF ACRYLIC MONOMERS, ORGANIC CROSSLINKING AGENT FOR SAID COPOLYMER AND INORGANIC PARTICULATE SOLIDS AND HAS AN AVERAGE MAXIMUM PARTICLE DIAMETER ABOVE 10 MICRONS IS MOLDED AT ELEVATED TEMPERATURES AND PRESSURES, THE IMPROVEMENT WHEREIN:
Claim 3
Dependent Claim
41 words
SAID EPOXY FUNCTIONAL COPOLYMER OF ACRYLIC MONOMERS CONSISTS OF ABOUT 15 TO ABOUT 40 WEIGHT PERCENT GLYCIDYL METHACRYLATE WHICH PROVIDES SAID COPOLYMER WITH ITS EPOXY-FUNCTIONALITY, ABOUT 10 TO ABOUT 30 WEIGHT PERCENT METHACRYLONITRILE AND A REMAINDER CONSISTING ESSENTIALLY OF METHYL METHACRYALTE;
Claim 4
Dependent Claim
41 words
SAID EPOXY FUNCTIONAL COPOLYMER OF ACRYLIC MONOMERS CONSISTS OF ABOUT 15 TO ABOUT 40 WEIGHT PERCENT GLYCIDYL METHACRYLATE WHICH PROVIDES SAID COPOLYMER WITH ITS EPOXY-FUNCTIONALITY, ABOUT 10 TO ABOUT 30 WEIGHT PERCENT METHACRYLONITRILE AND A REMAINDER CONSISTING ESSENTIALLY OF METHYL METHACRYALTE;
Claim 5
Dependent Claim
44 words
SAID EPOXY-FUNCTIONAL COPOLYMER OF ACRYLIC MONOMERS HAS A SOFTENING POINT ABOVE 25*C AND AN AVERAGE MOLECULAR WEIGHT IN THE RANGE OF ABOUT 1,500 TO ABOUT 16,000 WITH LESS THAN 5 PERCENT OF THE MOLECULES OF SAID COPOLYMER HAVING AN AVERAGE MOLEUCLAR WEIGHT BELOW 1,000;
Claim 6
Dependent Claim
44 words
SAID EPOXY-FUNCTIONAL COPOLYMER OF ACRYLIC MONOMERS HAS A SOFTENING POINT ABOVE 25*C AND AN AVERAGE MOLECULAR WEIGHT IN THE RANGE OF ABOUT 1,500 TO ABOUT 16,000 WITH LESS THAN 5 PERCENT OF THE MOLECULES OF SAID COPOLYMER HAVING AN AVERAGE MOLEUCLAR WEIGHT BELOW 1,000;
Claim 7
Dependent Claim
24 words
The method of claim 1 wherein said epoxy-functional copolymer of acrylic monomers has an average molecular weight in the range of 2,000 to 10,000.
Claim 8
Dependent Claim
44 words
said epoxy-functional copolymer of acrylic monomers has a softening point above 25*C and an average molecular weight in the range of about 1,500 to about 16,000 with less than 5 percent of the molecules of said copolymer having an average molecular weight below 1,000;
Claim 9
Dependent Claim
44 words
said epoxy-functional copolymer of acrylic monomers has a softening point above 25*C and an average molecular weight in the range of about 1,500 to about 16,000 with less than 5 percent of the molecules of said copolymer having an average molecular weight below 1,000;
Claim 10
Dependent Claim
51 words
said epoxy-functional copolymer of acrylic monomers has a softening point in the range of about 5* to about 110*C and an average molecular weight in the range of about 1,500 to about 16,000 with less than 5 percent of the molecules of said copolymer having an average molecular weight below 1,000,
Claim 11
Dependent Claim
51 words
said epoxy-functional copolymer of acrylic monomers has a softening point in the range of about 5* to about 110*C and an average molecular weight in the range of about 1,500 to about 16,000 with less than 5 percent of the molecules of said copolymer having an average molecular weight below 1,000,
Claim 12
Dependent Claim
60 words
said epoxy-functional copolymer of acrylic monomers, said organic crosslinking agent for said copolymer and said inorganic particulate solids have been mechanically reduced to an average maximum particle diameter below about 10 microns prior to molding with less than 10 percent of the particles thereof having a maximum diameter above 25 microns and intimately mixed to form a molding powder; and
Claim 13
Dependent Claim
60 words
said epoxy-functional copolymer of acrylic monomers, said organic crosslinking agent for said copolymer and said inorganic particulate solids have been mechanically reduced to an average maximum particle diameter below about 10 microns prior to molding with less than 10 percent of the particles thereof having a maximum diameter above 25 microns and intimately mixed to form a molding powder; and
Claim 14
Dependent Claim
24 words
The method of claim 1 wherein said epoxy-functional copolymer of acrylic monomers has an average molecular weight in the range of 3,500 to 8,000.
Claim 15
Dependent Claim
60 words
SAID EPOXY-FUNCTIONAL COMPOLYMER OF ACRYLIC MONOMERS, SAID ORGANIC CROSSLINKING AGENT FOR SAID COPOLYMER AND SAID INORGANIC PARTICULATE SOLIDS HAVE BEEN MECHANICALLY REDUCED TO AN AVERAGE MAXIMUM PARTICLE DIAMETER BELOW ABOUT 10 MICRONS PRIOR TO MOLDING WITH LESS THAN 10 PERCENT OF THE PARTICLES THEREOF HAVING A MAXIMUM DIAMETER ABOVE 25 MICRONS AND INTIMATELY MIXED TO FORM A MOLDING POWDER; AND
Claim 16
Dependent Claim
60 words
SAID EPOXY-FUNCTIONAL COMPOLYMER OF ACRYLIC MONOMERS, SAID ORGANIC CROSSLINKING AGENT FOR SAID COPOLYMER AND SAID INORGANIC PARTICULATE SOLIDS HAVE BEEN MECHANICALLY REDUCED TO AN AVERAGE MAXIMUM PARTICLE DIAMETER BELOW ABOUT 10 MICRONS PRIOR TO MOLDING WITH LESS THAN 10 PERCENT OF THE PARTICLES THEREOF HAVING A MAXIMUM DIAMETER ABOVE 25 MICRONS AND INTIMATELY MIXED TO FORM A MOLDING POWDER; AND
Claim 17
Dependent Claim
60 words
said epoxy-functional copolymer of acrylic monomers, said organic crosslinking agent for said copolymer and said inorganic particulate solids have been mechanically reduced to an average maximum particle diameter between about 5 and about 10 microns with less than 10 percent of the particles thereof having a maximum diameter above 25 microns and intimately mixed to form a molding powder, and
Claim 18
Dependent Claim
60 words
said epoxy-functional copolymer of acrylic monomers, said organic crosslinking agent for said copolymer and said inorganic particulate solids have been mechanically reduced to an average maximum particle diameter between about 5 and about 10 microns with less than 10 percent of the particles thereof having a maximum diameter above 25 microns and intimately mixed to form a molding powder, and
Claim 19
Dependent Claim
26 words
SAID MOLDING POWDER IS MOLDED AT A TEMPERATURE IN THE RANGE OF 300*-400*F AT A PRESSURE IN THE RANGE OF ABOUT 500 TO ABOUT 2,000 PSI.
Claim 20
Dependent Claim
26 words
SAID MOLDING POWDER IS MOLDED AT A TEMPERATURE IN THE RANGE OF 300*-400*F AT A PRESSURE IN THE RANGE OF ABOUT 500 TO ABOUT 2,000 PSI.
Claim 21
Dependent Claim
23 words
The method of claim 1 wherein said epoxy-functional copolymer of acrylic monomers has a softening point in the range of 50* to 110*C.
Claim 22
Dependent Claim
27 words
said molding powder is molded at a temperature in the range of 300*-400* F at a pressure in the range of about 500 to about 2,000 psi.
Claim 23
Dependent Claim
27 words
said molding powder is molded at a temperature in the range of 300*-400* F at a pressure in the range of about 500 to about 2,000 psi.
Claim 24
Dependent Claim
26 words
said molding powder is molded at a temperature in the range of 300*-400*F at a pressure in the range of about 500 to about 2,000 psi.
Claim 25
Dependent Claim
26 words
said molding powder is molded at a temperature in the range of 300*-400*F at a pressure in the range of about 500 to about 2,000 psi.
Claim 26
Dependent Claim
31 words
The method of claim 1 wherein said molding powder is molded at a temperature in the range of 350*-380*F and at a pressure in the range of 1,000 to 1,600 psi.
Claim 27
Dependent Claim
40 words
The method of claim 1 wherein said epoxy-functional copolymer of acrylic monomers consists essentially of about 20 to about 35 weight percent glycidyl methacrylate, about 10 to about 25 weight percent methacrylonitrile and a remainder consisting essentially of methyl methacrylate.
Claim 28
Dependent Claim
63 words
In a method for producing reinforced, thermoset resin articles of manufacture wherein a particulate moldable material which, on a catalyst and fibrous material-free basis, consists essentially of an epoxy-functional copolymer of acrylic monomers, organic crosslinking agent for said copolymer and inorganic particulate solids and has an average maximum particle diameter above 10 microns is molded at elevated temperatures and pressures, the improvement wherein:
Claim 29
Dependent Claim
63 words
In a method for producing reinforced, thermoset resin articles of manufacture wherein a particulate moldable material which, on a catalyst and fibrous material-free basis, consists essentially of an epoxy-functional copolymer of acrylic monomers, organic crosslinking agent for said copolymer and inorganic particulate solids and has an average maximum particle diameter above 10 microns is molded at elevated temperatures and pressures, the improvement wherein:
Claim 30
Dependent Claim
21 words
The method of claim 7 wherein said epoxy-functional copolymer of acrylic monomers has an average molecular weight between 2,000 and 10,000.
Claim 31
Dependent Claim
40 words
The method of claim 7 wherein said epoxy-functional copolymer of acrylic monomers consists essentially of about 20 to about 35 weight percent glycidyl methacrylate, about 10 to about 25 weight percent methacrylonitrile and a remainder consisting essentially of methyl methacrylate.
Claim 32
Dependent Claim
22 words
The method of claim 7 wherein said molding powder is molded at a pressure in the range of 1,000 to 1,600 psi.
Claim 33
Dependent Claim
19 words
The method of claim 7 wherein said molding powder is molded at a temperature in the range of 350*-380*F.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |