US4595725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsaturated polyester resins, a process for their production and their use for the production of molding compositions
Assignee: DSM BV
•
Filing: 1985-03-15
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Granted: 1986-06-17
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Expires: 2005-03-15
Abstract
Abstract Certain unsaturated polyester resins, so-called soft resins, having certain parameters are suitable for the production of hardened moldings of high elasticity.
Inventors
- 👤 Bernhard Hess
- 👤 Bert Brassat
- 👤 Bernhard Peltzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:48
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/676; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/68; C08G18/683; C08G18/686; C08G63/02; C08G63/12; C08G63/52
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
194 words
An unsaturated polyester resin comprising A. from 30 to 70 parts, by weight of the resin, of α,β-ethylenically unsaturated polyester and B. from 30 to 70 parts, by wieght of the resin, of monomer copolymerizable with polyester A, where polyester A is comprised of residues formed by the reaction of (a) at least one α,β-ethylenically unsaturated dicarboxylic acid and/or its anhydride, (b) at least one hydrogenated phthalic acid and/or its anhydride, (c) at least one ether glycol, (d) at least one branching agent, and where the dicarboxylic acid residues (a) are comprised of at least 15 mole % fumaric acid residues, based on dicarboxylic acid residues (a), the content of dicarboxlylic acid residues (a) amounts to at most 30 mole %, based on the sum of the polycarboxylic acid residues, the content of ether glycol residues amounts to between 0.2 and 0.5 moles of ether groups per 100 g of polyester A, the content of branching agent residues amounts to between 1 and 15 mole %, based on the sum of the alcohol residues, the acid number of polyester A is less than 50 and hydroxyl number of polyester A is less than 70.
Claim 2
Dependent Claim
194 words
An unsaturated polyester resin comprising A. from 30 to 70 parts, by weight of the resin, of α,β-ethylenically unsaturated polyester and B. from 30 to 70 parts, by wieght of the resin, of monomer copolymerizable with polyester A, where polyester A is comprised of residues formed by the reaction of (a) at least one α,β-ethylenically unsaturated dicarboxylic acid and/or its anhydride, (b) at least one hydrogenated phthalic acid and/or its anhydride, (c) at least one ether glycol, (d) at least one branching agent, and where the dicarboxylic acid residues (a) are comprised of at least 15 mole % fumaric acid residues, based on dicarboxylic acid residues (a), the content of dicarboxlylic acid residues (a) amounts to at most 30 mole %, based on the sum of the polycarboxylic acid residues, the content of ether glycol residues amounts to between 0.2 and 0.5 moles of ether groups per 100 g of polyester A, the content of branching agent residues amounts to between 1 and 15 mole %, based on the sum of the alcohol residues, the acid number of polyester A is less than 50 and hydroxyl number of polyester A is less than 70.
Claim 3
Dependent Claim
32 words
A polyester resin as claimed in claim 1, wherein the dicarboxylic acid residues (a) are comprised of between 30 and 90 mole % fumaric acid residues, based on dicarboxylic acid residues (a).
Claim 4
Dependent Claim
32 words
A polyester resin as claimed in claim 1, wherein the content of carboxylic acid residues (a) amounts to at most 20 mole %, based on the sum of the polycarboxylic acid residues.
Claim 5
Dependent Claim
32 words
A polyester resin as claimed in claim 2, wherein the content of carboxylic acid residues (a) amounts to at most 20 mole %, based on the sum of the polycarboxylic acid residues.
Claim 6
Dependent Claim
19 words
A polyester resin as claimed in claim 1, wherein the acid number of polyester A is less than 35.
Claim 7
Dependent Claim
19 words
A polyester resin as claimed in claim 2, wherein the acid number of polyester A is less than 35.
Claim 8
Dependent Claim
19 words
A polyester resin as claimed in claim 3, wherein the acid number of polyester A is less than 35.
Claim 9
Dependent Claim
19 words
A polyester resin as claimed in claim 4, wherein the acid number of polyester A is less than 35.
Claim 10
Dependent Claim
19 words
A polyester resin as claimed in claim 1 wherein the hydroxyl number of polyester A is less than 50.
Claim 11
Dependent Claim
47 words
A polyester resin as claimed in claim 1 further comprising (e) other carboxylic acids and (f) other alcohols wherein the content of residues of other acids and other alcohols amounts to at most 15 mole %, based on the sum of all the acid and alcohol residues.
Claim 12
Dependent Claim
31 words
A polyester resin as claimed in claim 1 further comprising, (g) a polyisocyanate, wherein the urethane group content amount up to at most 0.05 mole per 100 g of polyester A.
Claim 13
Dependent Claim
132 words
A process for producing the polyester resins claimed in 1 comprising in a first stage, producing from components (b), (c) and (d) a branched precondensate, where at least 85 mole % of the acid residues comprise residues component of (b), where the branched precondensate contains from 1 to 15 mole % branching agent residues, based on the sum of the alcohol residues, and where the sum of the acid and hydroxyl numbers in the branched precondensate amount to between 50 and 120, at least half that sum being contributed by the hydroxyl number; then in a second stage condensing component (a) onto the precondensate with the proviso that either fumaric acid is used as component (a) or, where maleic acid (anhydride) is used, a cis-/trans-isomerization can take place to the necessary extent.
Claim 14
Dependent Claim
133 words
A process for producing the polyester resins claimed in 10 comprising in a first stage, producing from components (b), (c), (d) and (e) a branched precondensate, where at least 85 mole % of the acid residues comprise residues of component (b), where the branched precondensate contains from 1 to 15 mole % branching agent residues, based on the sum of the alcohol residues, and where the sum of the acid and hydroxyl numbers in the branched precondensate amount to between 50 and 120, at least half that sum being contributed by the hydroxyl number; then in a second stage condensing component (a) onto the precondensate with the proviso that either fumaric acid is used as component (a) or, where maleic acid (anhydride) is used, a cis-/trans-isomerization can take place to the necessary extent.
Claim 15
Dependent Claim
25 words
A process as claimed in claim 12 wherein from 0.2 to 0.7 mole of component (a) is used per mole of hydroxyl in the precondensate.
Claim 16
Dependent Claim
23 words
A process as claimed in claim 12 wherein that the first stage of the process is carried out at 180° to 220° C.
Claim 17
Dependent Claim
21 words
The use of the polyester resins claimed in claim 1 for the production of thickened resin mats and dough-like molding compositions.
References Cited (Backward Citations)
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Cited
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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) | 1989-06-16 | 1989-12-16 | 1990-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-16 | 1993-12-16 | 1994-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-16 | 1997-12-16 | 1998-06-17 | $7700.00 | Window Closed / Lapsed |