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High functionality polyesters and coatings comprising the same
US9695264B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9695264-B2 |
| Application number | US-75255110-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 1, 2010 |
| Priority date | Apr 1, 2010 |
| Publication date | Jul 4, 2017 |
| Grant date | Jul 4, 2017 |
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- Title
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- Abstract
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- Assignees and inventors
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Abstract
Official abstract text for this publication.
A polyester prepared by free radical polymerization of an unsaturated polyester prepolymer, wherein the polymerization occurs primarily by reaction of the unsaturation of said prepolymer is disclosed. Coatings comprising the same are also disclosed, as are substrates coated at least in part with such coating.
First claim
Opening claim text (preview).
The invention claimed is: 1. A coating composition comprising a polyester resin and a crosslinker therefor; the polyester resin being an ungelled crosslinkable polyester resin comprising: (a) reacting a polycarboxylic acid with a polyol to form an unsaturated polyester prepolymer in which the unsaturation is along the backbone of the unsaturated polyester prepolymer and wherein the unsaturated polyester prepolymer has terminal acid and/or hydroxyl functional groups, (b) subjecting the unsaturated polyester prepolymer to free radical polymerization via the points of unsaturation along the unsaturated polyester prepolymer backbone to form the ungelled crosslinkable polyester resin that has a weight average molecular weight of 10,000 to 4,000,000 and that has a higher weight average molecular weight than the unsaturated polyester prepolymer such that the weight average molecular weight ratio of the ungelled crosslinkable polyester resin to the unsaturated polyester prepolymer is at least 1.2 and the hydroxyl value and the acid value of the ungelled crosslinkable polyester resin is in the same range as those of the prepolymer; wherein the hydroxyl value of the unsaturated polyester prepolymer ranges from 2 to 500 mg KOH/gm and/or the acid value of the unsaturated polyester prepolymer ranges from 1 to 400 mg KOH/gm. 2. The coating composition of claim 1 in which the crosslinker comprises a phenolic resin or an aminoplast. 3. A package coated with the coating composition of claim 1 . 4. The package of claim 3 wherein the package is a metal can.
Assignees
Inventors
Classifications
Elemental metal containing [e.g., substrate, foil, film, coating, etc.] · CPC title
Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.] · CPC title
containing two or more polymers of the same C08L -group · CPC title
- C08F299/045Primary
Peroxy-compounds · CPC title
- C08G63/52Primary
Polycarboxylic acids or polyhydroxy compounds in which at least one of the two components contains aliphatic unsaturation · CPC title
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Frequently asked questions
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- What does patent US9695264B2 cover?
- A polyester prepared by free radical polymerization of an unsaturated polyester prepolymer, wherein the polymerization occurs primarily by reaction of the unsaturation of said prepolymer is disclosed. Coatings comprising the same are also disclosed, as are substrates coated at least in part with such coating.
- Who is the assignee on this patent?
- Lock Kam Lun, Woods Richard, Masters Nigel Francis, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification C08F299/045. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jul 04 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).