US4383902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photopolymerizable polyester resins, a process for their production and their use as lacquer binders
Assignee: Bayer AG
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Filing: 1981-03-11
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Granted: 1983-05-17
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Expires: 2001-03-11
Abstract
Abstract Polyesters containing co-condensed polyalkylene glycol residues as the sole air-drying components are, providing they satisfy certain requirements, an excellent basis for photopolymerizable unsaturated polyester resins which harden under UV-light very rapidly even in extremely thin layers.
Inventors
- 👤 Walter Frank
- 👤 Otto Bendszus
- 👤 Hans-Joachim Traenckner
- 👤 Hans-Joachim Freier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:36
CPC Classifications
C; C08; C08F; C08F299/00; C08F299/02; C08F299/04; C08F299/0407; C08F299/0421; C08F299/0428; C08F299/0435; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/676; C09; C09D; C09D167/00; C09D167/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
118 words
Photopolymerizable mixtures containing (a) from 30 to 70 parts by weight of at least one α,β-ethylenically unsaturated polyester, (b) from 30 to 70 parts by weight of at least one unsaturated monomer copolymerizable with (a), (c) from 0.5 to 4.0 parts by weight of at least one photoinitiator and, optionally, (d) other standard additives, characterised in that the polyester (a) contains at least 28% by weight of residues of α,β-ethylenically unsaturated dicarboxylic acids, from 30 to 50% by weight of polyalkylene glycol residues having an average molecular weight of from 300 to 600 and optionally up to 42% by weight of other alcohol or carboxylic acid residues, the percentage quoted being based in each case on polyester (a).
Claim 2
Dependent Claim
118 words
Photopolymerizable mixtures containing (a) from 30 to 70 parts by weight of at least one α,β-ethylenically unsaturated polyester, (b) from 30 to 70 parts by weight of at least one unsaturated monomer copolymerizable with (a), (c) from 0.5 to 4.0 parts by weight of at least one photoinitiator and, optionally, (d) other standard additives, characterised in that the polyester (a) contains at least 28% by weight of residues of α,β-ethylenically unsaturated dicarboxylic acids, from 30 to 50% by weight of polyalkylene glycol residues having an average molecular weight of from 300 to 600 and optionally up to 42% by weight of other alcohol or carboxylic acid residues, the percentage quoted being based in each case on polyester (a).
Claim 3
Dependent Claim
25 words
Mixtures as claimed in claim 1, characterised in that the polyesters (a) contain at least 30% by weight of residues of α,β-ethylenically unsaturated dicarboxylic acids.
Claim 4
Dependent Claim
24 words
Mixtures as claimed in claim 1 or 2, characterised in that the residues of α,β-ethylenically unsaturated dicarboxylic acids are maleic and/or fumaric acid residues.
Claim 5
Dependent Claim
23 words
Mixtures as claimed in claim 1, characterised in that the polyesters (a) contain from 33 to 45% by weight of polyalkylene glycol residues.
Claim 6
Dependent Claim
26 words
Mixtures as claimed in claim 1, characterised in that the polyesters (a) contain polyalkylene glycol residues having an average molecular weight of from 350 to 500.
Claim 7
Dependent Claim
40 words
Mixtures as claimed in claim 1, characterised in that, in addition to the residues of α,β-ethylenically unsaturated dicarboxylic acids and the polyalkylene glycol residues, the polyesters (a) contain up to 37% by weight of other alcohol or carboxylic acid residues.
Claim 8
Dependent Claim
58 words
Mixtures as claimed in claim 1, characterised in that the polyesters (a) contain from 30 to 40% by weight of maleic and/or fumaric acid residues, from 30 to 45% by weight of polyalkylene glycol residues having an average molecular weight of from 350 to 500, and from 15 to 40% by weight of ethylene and/or propylene glycol residues.
Claim 9
Dependent Claim
125 words
A process for producing the mixtures claimed in claim 1, characterised in that the polyester starting components are slowly heated to 170°-210° C., the water of reaction given off is removed by an inert gas stream and heating is continued until the required molecular weight, the required viscosity or the required acid number is reached, after which the reaction mixture is stabilised with hydroquinone or with any other standard commercial stabiliser and (a) from 30 to 70 parts by weight of the polyester thus obtained, (b) from 30 to 70 parts by weight of at least one monomer copolymerisable with (a), (c) from 0.5 to 4.0 parts by weight of at least one photo-initiator and, optionally, (d) other standard additives are mixed with one another.
Claim 10
Dependent Claim
11 words
A lacquer containing a mixture of claim 1 as lacquer binder.
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) | 1986-05-16 | 1986-11-15 | 1987-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-16 | 1990-11-15 | 1991-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-16 | 1994-11-15 | 1995-05-17 | $7700.00 | Window Closed / Lapsed |