US4151219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl ester resins containing polyoxyalkylene low profile additives
Assignee: Dow Chemical Co
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Filing: 1978-04-26
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Granted: 1979-04-24
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Expires: 1998-04-26
Abstract
Abstract Low shrink and low profile reinforced plastic systems are prepared from vinyl ester resins by incorporating therein an additive having the formula: ##STR1## WHEREIN R 1 and R 2 are hydrogen, methyl or ethyl with the provision that, if either R 1 or R 2 is hydrogen, the other is methyl or ethyl, n and m are whole numbers such that said additive is soluble in said resin when uncured and insoluble in said resin when cured; and B is the residue of a hydroxyl containing initiating compound. Typical of such compounds are water, ethylene glycol, glycerine and phenol. The value of p is equal to or less than the number of hydroxyls in the initiating compound.
Inventors
- 👤 James L. Brewbaker
- 👤 William A. Sprenger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:19
CPC Classifications
C; C08; C08F; C08F299/00; C08F299/02; C08F299/026; C08L; C08L63/00; C08L63/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
125 words
A thermosettable composition comprising a mixture of (a) a terminally unsaturated vinyl ester resin comprising the reaction product of an unsaturated monocarboxylic acid with a polyepoxide, (b) at least one vinyl monomer copolymerizable therewith; and (c) a polyoxyalkylene low profile additive having the formula: ##STR5## wherein R 1 and R 2 are hydrogen, methyl or ethyl with the provision that when either is hydrogen the other must be methyl or ethyl; B is the residue of a hydroxyl containing initiating compound with the value of p equal to or less than the number of hydroxyls in the initiating compound, and m and n are whole numbers such that said additive is soluble in said vinyl ester resin when uncured and insoluble in the cured resin.
Claim 2
Dependent Claim
125 words
A thermosettable composition comprising a mixture of (a) a terminally unsaturated vinyl ester resin comprising the reaction product of an unsaturated monocarboxylic acid with a polyepoxide, (b) at least one vinyl monomer copolymerizable therewith; and (c) a polyoxyalkylene low profile additive having the formula: ##STR5## wherein R 1 and R 2 are hydrogen, methyl or ethyl with the provision that when either is hydrogen the other must be methyl or ethyl; B is the residue of a hydroxyl containing initiating compound with the value of p equal to or less than the number of hydroxyls in the initiating compound, and m and n are whole numbers such that said additive is soluble in said vinyl ester resin when uncured and insoluble in the cured resin.
Claim 3
Dependent Claim
21 words
The resin composition of claim 1 containing from 7 to 16 weight percent polypropylene oxide having a molecular weight of 2000.
Claim 4
Dependent Claim
22 words
The resin composition of claim 1 containing from 4 to 16 weight percent of polypropylene oxide having a molecular weight of 4000.
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) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |