US4735992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers obtained from oligomers of anhydride-grafted polypropylene, manufacturing process and uses
Assignee: Arkema France SA
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Filing: 1986-12-03
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Granted: 1988-04-05
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Expires: 2006-12-03
Abstract
Abstract Polymers resulting from the association of two reactive components having a low melt viscosity, characterized in that one of the components is a polypropylene modified by grafting an unsaturated monomer bearing an acid anhydride group and the other is a compound R posessing at least two groups which are reactive towards this anhydride group. Uses in the manufacture of moulded articles by the reaction-injection-moulding technique, or in the manufacture of composite materials. Uses as coatings for metallic articles.
Inventors
- 👤 Pierre Nogues
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:49
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/06; C08F; C08F255/00; C08F255/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
105 words
A polymer obtained from the reaction of (a) an anhydride grafted polypropylene, having a melt viscosity below 500 Pa s, measured at 200° C. at a shear rate 10s -1 , essentially free of residual monomeric carboxylic acid anhydride, and (b) a compound R possessing at least two identical or non-identical groups reactive towards an anhydride group, the respective quantities of said grafted polypropylene and said compound R being such that their molarity ratio, defined as the ratio of the number of reactive groups carried by the compound R to the number of anhydride groups carried by the grafted polypropylene, is between 0.01 and 2.
Claim 2
Dependent Claim
105 words
A polymer obtained from the reaction of (a) an anhydride grafted polypropylene, having a melt viscosity below 500 Pa s, measured at 200° C. at a shear rate 10s -1 , essentially free of residual monomeric carboxylic acid anhydride, and (b) a compound R possessing at least two identical or non-identical groups reactive towards an anhydride group, the respective quantities of said grafted polypropylene and said compound R being such that their molarity ratio, defined as the ratio of the number of reactive groups carried by the compound R to the number of anhydride groups carried by the grafted polypropylene, is between 0.01 and 2.
Claim 3
Dependent Claim
13 words
Polymer according to claim 1, wherein the polypropylene is grafted with maleic anhydride.
Claim 4
Dependent Claim
29 words
Polymer according to claim 1, wherein the compound R belongs to the group consisting of polyols, polyamines, polyepoxides and polyisocyanates and has a molecular weight of less than 50,000.
Claim 5
Dependent Claim
13 words
Polymer according to claim 1, characterised in that the compound R is 1,6-hexanediol.
Claim 6
Dependent Claim
22 words
Polymer according to claim 1, characterised in that the compound R belongs to the group consisting of polyoxyethylene glycols and polyoxytetramethylene glycols.
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) | 1991-04-05 | 1991-10-05 | 1992-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-05 | 1995-10-05 | 1996-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-05 | 1999-10-05 | 2000-04-05 | $7700.00 | Window Closed / Lapsed |