US3715233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing fiberglass preforms
Assignee: Standard Oil Co
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Filing: 1970-09-18
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Granted: 1973-02-06
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Expires: 1990-09-18
Abstract
Abstract An improved process for the preparation of a polyester resin that can be solubilized in water as formed, and, when partially cured is insoluble in, but permeable to, polymerizable monomers such as styrene which comprises admixing a mixture of polycarboxyl-affording substances with a polyhydroxyl-affording substance and heating the mixture in the temperature range of 300*-450*F. until a thin sample of the material cures at 392*F. in from about 10 to about 40 seconds. The method of binding glass fibers into a mass suitable for reinforced-fiber molding purposes which comprises the steps of treating fibrous glass with the resin solubilized in water to form a resin-fiberglass composite and partially curing said composite at a temperature above about 200*F. until a water-insoluble, styrene-insoluble but styrene permeable composite is formed.
Inventors
- 👤 J Harrier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:33
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/26; C03C25/32; C03C25/323; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/123; C08G63/127; C08G63/52; C08G63/54
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
157 words
preparing the polycondensation reaction product of: a. trimellitic acid or the anhydride thereof, b. a saturated or mono-olefinic, dicarboxyl-affording compound having 3-6 carbon atoms or its anhydride, and c. a lower alkyl triol or a C2 6 glycol of the group consisting of alkylene glycol, ether glycol or mixtures thereof; wherein (a) and (b) are present in a respective mole ratio of about 3 to 1 to about 1 to 3 and wherein the amount of (c) is about 105 to 150 mole percent of the amount required to react with the carboxyl groups of said (a) and (b), said polycondensation reaction product having an acid number of about 30 to about 120, by heating said (a), (b) and (c) at a temperature from about 300*F. to about 450*F. until a thin sample of said polyester resin cures, when smeared on a surface held at 392*F., in a time from about 10 seconds to about 40 seconds,
Claim 2
Dependent Claim
157 words
preparing the polycondensation reaction product of: a. trimellitic acid or the anhydride thereof, b. a saturated or mono-olefinic, dicarboxyl-affording compound having 3-6 carbon atoms or its anhydride, and c. a lower alkyl triol or a C2 6 glycol of the group consisting of alkylene glycol, ether glycol or mixtures thereof; wherein (a) and (b) are present in a respective mole ratio of about 3 to 1 to about 1 to 3 and wherein the amount of (c) is about 105 to 150 mole percent of the amount required to react with the carboxyl groups of said (a) and (b), said polycondensation reaction product having an acid number of about 30 to about 120, by heating said (a), (b) and (c) at a temperature from about 300*F. to about 450*F. until a thin sample of said polyester resin cures, when smeared on a surface held at 392*F., in a time from about 10 seconds to about 40 seconds,
Claim 3
Dependent Claim
181 words
preparing the polycondensation reaction product of: a. trimellitic acid or the anhydride thereof, b. a saturated or mono-olefinic, dicarboxyl-affording compound having 3-6 carbon atoms or its anhydride, c. a benzene dicarboxyl-affording compound, and d. a lower alkyl triol or a C2 6 glycol of the group consisting of alkylene glycol, ether glycol or mixtures thereof; wherein (a) and (b) are present in a respective mole ratio of about 3 to 1 to about 1 to 3, wherein (c) is present in an amount of about 0 to 2 moles per mole of (a) and wherein the amount of (d) is about 105 to 150 mole percent of the amount required to react with the carboxyl groups of said (a), (b) and (c), said polycondensation Reaction product having an acid number of about 30 to about 120, by heating said (a), (b), (c) and (d) at a temperature from about 300*F. to about 450*F. until a thin sample of said polyester resin cures, when smeared on a surface held at 392*F., in a time from about 10 seconds to about 40 seconds,
Claim 4
Dependent Claim
181 words
preparing the polycondensation reaction product of: a. trimellitic acid or the anhydride thereof, b. a saturated or mono-olefinic, dicarboxyl-affording compound having 3-6 carbon atoms or its anhydride, c. a benzene dicarboxyl-affording compound, and d. a lower alkyl triol or a C2 6 glycol of the group consisting of alkylene glycol, ether glycol or mixtures thereof; wherein (a) and (b) are present in a respective mole ratio of about 3 to 1 to about 1 to 3, wherein (c) is present in an amount of about 0 to 2 moles per mole of (a) and wherein the amount of (d) is about 105 to 150 mole percent of the amount required to react with the carboxyl groups of said (a), (b) and (c), said polycondensation Reaction product having an acid number of about 30 to about 120, by heating said (a), (b), (c) and (d) at a temperature from about 300*F. to about 450*F. until a thin sample of said polyester resin cures, when smeared on a surface held at 392*F., in a time from about 10 seconds to about 40 seconds,
Claim 5
Dependent Claim
11 words
A process for binding glass fibers which comprises the steps of:
Claim 6
Dependent Claim
11 words
A process for binding glass fibers which comprises the steps of:
Claim 7
Dependent Claim
30 words
The process of claim 1 wherein (b) is adipic acid or the anhydride thereof or maleic acid or the anhydride thereof, (c) is isophthalic acid and (d) is propylene glycol.
Claim 8
Dependent Claim
9 words
applying said polycondensation reaction product to glass fibers, and
Claim 9
Dependent Claim
9 words
applying said polycondensation reaction product to glass fibers, and
Claim 10
Dependent Claim
9 words
applying said polycondensation reaction product to glass fibers, and
Claim 11
Dependent Claim
9 words
applying said polycondensation reaction product to glass fibers, and
Claim 12
Dependent Claim
20 words
heating the composite of step 2 to above 300*F. until said polycondensation reaction product is substantially styrene-permeable and substantially styrene-insoluble.
Claim 13
Dependent Claim
20 words
heating the composite of step 2 to above 300*F. until said polycondensation reaction product is substantially styrene-permeable and substantially styrene-insoluble.
Claim 14
Dependent Claim
20 words
heating the composite of step 2 to above 300*F. until said polycondensation reaction product is substantially styrene-permeable and substantially styrene-insoluble.
Claim 15
Dependent Claim
20 words
heating the composite of step 2 to above 300*F. until said polycondensation reaction product is substantially styrene-permeable and substantially styrene-insoluble.
Claim 16
Dependent Claim
73 words
The process of claim 2 wherein the mole ratio of said (b) to (a) is from about 0.8 to 1 to about 1.2 to 1, the mole ratio of said (c) to (a) is from 0.8 to 1 to about 1.2 to 1 and the amount of said (d) is about 110 to about 120 mole percent of the amount required to react with the carboxyl groups of said (a), (b) and (c).
Claim 17
Dependent Claim
28 words
The process of claim 3 wherein a water-solubilized mixture of the polycondensation reaction product prepared in step 1 and water is applied to glass fibers in step 2.
Claim 18
Dependent Claim
100 words
The process of claim 3 wherein said heating of said (a), (b), (c) and (d) in step 1 is accomplished by: i. heating a mixture of (b), (c) and (d) from about 300*F. to about 450*F. until an acid number of about 5 to about 15 is obtained, ii. admixing reactant (a) with the heated mixture of step (i), and iii. heating the resulting combination from about 300*F. to about 450*F. until a thin sample of the polyester resin cures, when smeared on a surface heated to 392*F., in a time of from about 20 seconds to about 30 seconds.
Claim 19
Dependent Claim
28 words
The process of claim 5 wherein a water-solubilized mixture of the polycondensation reaction product prepared in step 1 and water is applied to glass fibers in step 2.
Claim 20
Dependent Claim
11 words
A process for binding glass fibers which comprises the steps of:
Claim 21
Dependent Claim
11 words
A process for binding glass fibers which comprises the steps of:
Claim 22
Dependent Claim
27 words
The process of claim 7 wherein said (b) is adipic acid or the anhydride thereof or maleic acid or the anhydride thereof and (c) is propylene glycol.
Claim 23
Dependent Claim
55 words
The process of claim 8 wherein the mole ratio of said (a) to said (b) is from about 3.3 to 2 to about 2.7 to 2 and the amount of said (c) is about 120 to about 125 mole percent of the amount required to react with the carboxyl groups of said (a) and (b).
Claim 24
Dependent Claim
28 words
The process of claiM 9 wherein a water-solubilized mixture of the polycondensation reaction product prepared in step 1 and water is applied to glass fibers in step 2.
Claim 25
Dependent Claim
96 words
The process of claim 9 wherein said heating of said (b) and (c) in step 1 is accomplished by: i. heating a mixture of (b) and (c) from about 300*F. to about 450*F. until an acid number of about 5 to 15 is obtained, ii. admixing reactant (a) with the heated mixture of step (i), and iii. heating the resulting combination from about 300*F. to about 450*F. until a thin sample of the polyester resin cures, when smeared on a surface heated to 392*F., in a time of from about 20 seconds to about 30 seconds.
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) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |