US3843612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moldable and/or thermoformable acrylic polymers and processes for the production thereof
Assignee: Rohm and Haas Co
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Filing: 1971-12-23
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Granted: 1974-10-22
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Expires: 1991-12-23
Abstract
Abstract A process for the production of acrylic moldable and/or thermoformable polymers by the free radical polymerization of a mixture of monomers containing from 40 to 98 weight percent of lower alkyl methacrylate, cycloalkyl methacrylate, styrene, or substituted styrene or a mixture of such monomers, from 2 to 60 weight percent of an Alpha , Beta -unsaturated carboxylic acid having at most a single substituent other than hydrogen in the Alpha or Beta position, and a 3,4-epoxycyclohexylcarbinyl 3,4epoxycyclohexanecarboxylate in an amount such that the ratio of epoxy groups to carboxyl groups is 0.1 to 1.2. The polymers thus produced have an even distribution of the cross-linking material, and are useful as moldable or thermoformable materials.
Inventors
- 👤 M Vogel
- 👤 M Hurwitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:23
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F20/00; C08F20/62; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F8/00; C08F8/14; C08F2810/00; C08F2810/20
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
61 words
A PROCESS FOR PRODUCING A FORMED ARTICLE WHICH COMPRISES FIRST REACTING, AT A TEMPERATURE OF ABOUT 20* TO 80*C., A MIXTURE OF A. A MONOMERIC MATERIAL CONTAINING 1. 40 TO 98 WEIGHT PERCENT OF A (C1-C4) ALKYL METHACRYLATE, CHCLOHEXYL METHACRYLATE, STYRENE, VINYLTOLUENE OR A MIXTURE THEREOF, 2. 2 TO 60 WEIGHT PERCENT OF ONE OR MORE A,B-MONOETHYLENICALLY UNSATURATED CARBOXYLIC ACID, AND
Claim 2
Dependent Claim
61 words
A PROCESS FOR PRODUCING A FORMED ARTICLE WHICH COMPRISES FIRST REACTING, AT A TEMPERATURE OF ABOUT 20* TO 80*C., A MIXTURE OF A. A MONOMERIC MATERIAL CONTAINING 1. 40 TO 98 WEIGHT PERCENT OF A (C1-C4) ALKYL METHACRYLATE, CHCLOHEXYL METHACRYLATE, STYRENE, VINYLTOLUENE OR A MIXTURE THEREOF, 2. 2 TO 60 WEIGHT PERCENT OF ONE OR MORE A,B-MONOETHYLENICALLY UNSATURATED CARBOXYLIC ACID, AND
Claim 3
Dependent Claim
17 words
2 to 60 weight percent of one or more Alpha , Beta -monoethylenically unsaturated carboxylic acid, and
Claim 4
Dependent Claim
17 words
2 to 60 weight percent of one or more Alpha , Beta -monoethylenically unsaturated carboxylic acid, and
Claim 5
Dependent Claim
23 words
The process of claim 1 wherein the acid monomer is selected from the group consisting of methacrylic acid, acrylic acid, and itaconic acid.
Claim 6
Dependent Claim
19 words
The process of claim 1 wherein the acid monomer is methacrylic acid and monomer (a) (1) is methyl methacrylate.
Claim 7
Dependent Claim
17 words
optionally up to 5 weight percent of another monoethylenically unsaturated monomer having a group of the formula
Claim 8
Dependent Claim
17 words
optionally up to 5 weight percent of another monoethylenically unsaturated monomer having a group of the formula
Claim 9
Dependent Claim
17 words
OPTIONALLY UP TO 5 WEIGHT PERCENT OF ANOTHER MONOETHYLENICALLY UNSATURATED MONOMER HAVING A GROUP OF THE FORMULA
Claim 10
Dependent Claim
17 words
OPTIONALLY UP TO 5 WEIGHT PERCENT OF ANOTHER MONOETHYLENICALLY UNSATURATED MONOMER HAVING A GROUP OF THE FORMULA
Claim 11
Dependent Claim
33 words
A process according to claim 1 in which the amount of (b) is such as to provide about 0.5 to 0.9 epoxy groups per carboxylic acid group in (a) (2) of claim 1.
Claim 12
Dependent Claim
31 words
A process according to claim 1 which is effected to introduce into the product an oxirane oxygen content of 0.2 to 7% by weight derived from the oxirane groups of (b).
Claim 13
Dependent Claim
25 words
A process according to claim 1 which is effected to introduce into the product an oxirane oxygen content of about 0.4 to 7% by weight.
Claim 14
Dependent Claim
21 words
The process of claim 1 further including molding or shaping said viscous to solid polymeric products produced by the first step.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |