Patent US3875255A successfully refreshed from Google Patents.
US3875255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grafting methyl methacrylate monomer into a epoxy copolymer backbone
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1973-03-20
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Granted: 1975-04-01
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Expires: 1993-03-20
Abstract
Abstract An impact resistant methyl methacrylate resin is obtained by polymerizing 40 to 99 percent by weight of an unsaturated monomer mixture (A) comprising (a) 50 to 100 percent by weight of methyl methacrylate and (b) 50 to 0 percent by weight of at least one unsaturated monomer copolymerizable with methyl methacrylate in the presence of 60 to 1 percent by weight of an ethylene copolymer (B) containing epoxy group.
Inventors
- 👤 Yasuyuki Kato
- 👤 Masahiko Moritani
- 👤 Shuichi Konishi
- 👤 Yoshiharu Tatsukami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:22
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
125 words
A PROCESS FOR PRODUCING AN IMPACT RESISTANT METHYL METHACRYLATE RESIN, WHICH COMPRISES POLYMERIZING 40 TO 99 PERCENT BY WEIGHT OF (A) AN UNSATURATED MONOMER MIXTURE COMPRISING (A) 50 TO 100 PERCENT BY WEIGHT OF METHYL METHACRYLATE AND (B) 50 TO 10 PERCENT BY WEIGHT OF AT LEAST ONE UNSATURATED MONOMER COPOLYMERIZABLE WITH METHYL METHACRYLATE, THE PERCENTAGE BY WEIGHT OF THESE MONOMERS BEING BASED ON THE TOTAL WEIGHT OF THE UNSATURATED MONOMERS, IN THE PRESENCE OF 60 TO 1 PERCENT BY WEIGHT OF (B) AN ETHYLENE COPOLYMER CONTAINING 5 TO 99.95 PERCENT BY WEIGHT OF ETHYLENE, 0.05 TO 95 PERCENT BY WEIGHT OF ONE OR MORE UNSATURATED EPOXY MONOMERS, AND 0 TO 50 PERCENT BY WEIGHT OF AT LEAST ONE OTHER UNSATURATED MONOMER COPOLYMERIZABLE WITH ETHYLENE.
Claim 2
Dependent Claim
125 words
A PROCESS FOR PRODUCING AN IMPACT RESISTANT METHYL METHACRYLATE RESIN, WHICH COMPRISES POLYMERIZING 40 TO 99 PERCENT BY WEIGHT OF (A) AN UNSATURATED MONOMER MIXTURE COMPRISING (A) 50 TO 100 PERCENT BY WEIGHT OF METHYL METHACRYLATE AND (B) 50 TO 10 PERCENT BY WEIGHT OF AT LEAST ONE UNSATURATED MONOMER COPOLYMERIZABLE WITH METHYL METHACRYLATE, THE PERCENTAGE BY WEIGHT OF THESE MONOMERS BEING BASED ON THE TOTAL WEIGHT OF THE UNSATURATED MONOMERS, IN THE PRESENCE OF 60 TO 1 PERCENT BY WEIGHT OF (B) AN ETHYLENE COPOLYMER CONTAINING 5 TO 99.95 PERCENT BY WEIGHT OF ETHYLENE, 0.05 TO 95 PERCENT BY WEIGHT OF ONE OR MORE UNSATURATED EPOXY MONOMERS, AND 0 TO 50 PERCENT BY WEIGHT OF AT LEAST ONE OTHER UNSATURATED MONOMER COPOLYMERIZABLE WITH ETHYLENE.
Claim 3
Dependent Claim
15 words
An impact resistant methyl methacrylate resin prepared by a method as claimed in claim 1.
Claim 4
Dependent Claim
16 words
A process according to claim 1, wherein the polymerization is carried out by radical polymerization methods.
Claim 5
Dependent Claim
79 words
The process of claim 1 wherein said unsaturated monomer copolymerizable with methyl methacrylate is selected from the group consisting of vinyl halides, unsaturated nitriles, styrenes, allyl acrylate, allyl methacrylate, crotyl acrylate, crotyl methacrylate, diallyl maleate, diallyl fumarate, ethylene glycol dimaleate, diallyl itaconate, methallyl acrylate, methallyl methacrylate, divinyl ether, diallyl ether, dimethallyl ether, ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, tetraethylene glycol dimethacrylate, 1,1,1-trimethoxypropane dimethacrylate, glyceryl triacrylate, diallyl phthalate, diallyl isophthalate, triallyl cyanurate, and divinylbenzene and mixtures thereof.
Claim 6
Dependent Claim
33 words
The process of claim 1, wherein said ethylene copolymer has an intrinsic viscosity of 0.1 to 4.5 dl/g as measured in tetralin at 135*C. or a melt index of about 1,000 to 0.01.
Claim 7
Dependent Claim
27 words
A process according to claim 5, wherein the unsaturated epoxy monomer is selected from the group consisting of unsaturated glycidyl esters, unsaturated glycidyl ethers, epoxyalkenes and p-glycidylstyrene.
Claim 8
Dependent Claim
25 words
A process according to claim 5, wherein the unsaturated monomer copolymerizable with ethylene is selected from the group consisting of vinyl acetate and acrylate esters.
Claim 9
Dependent Claim
73 words
A process according to claim 5, wherein the unsaturated monomer copolymerizable with ethylene is selected from the group consisting of alpha olefins, vinyl esters of saturated acids, unsaturated carboxylic acids, acrylate esters of saturated alcohols, methacrylate esters of saturated alcohols, maleic anhydride, mono- and di-esters of maleic acid with saturated alcohols having 1 to 18 carbon atoms, vinyl halides, styrene, halogen-substituted and alkyl-substituted styrenes, vinyl alkyl ethers, N-vinyl lactams and vinyl alkyl ketones.
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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |