Polyimide resin composition, and (polyimide resin)-fiber composite material
US-2016177062-A1 · Jun 23, 2016 · US
Compositions and methods of additive manufacturing of aromatic thermoplastics and articles made therefrom
US11618832B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11618832-B2 |
| Application number | US-201716325991-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 17, 2017 |
| Priority date | Aug 17, 2016 |
| Publication date | Apr 4, 2023 |
| Grant date | Apr 4, 2023 |
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- Title
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Abstract
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Polymer resins for the vat photopolymerization of thermoplastics are provided, in particular for the vat photopolymerization of thermoplastics with exception thermal stability and mechanical properties. In some aspects, the polymer resins are prepared by ring opening of an aromatic dianhydride with an alcohol containing an acrylate or methacrylate to produce a photocrosslinkable diacid monomer; conversion of the photocrosslinkable diacid monomer to a photocrosslinkable diacyl chloride; and polymerization of the photocrosslinkable diacyl chloride with an aromatic diamine to produce a photocrosslinkable precursor polymer. Upon crosslinking and drying, a thermal imidization can yield aromatic polyimide polymers with high yield and with micron-scale structural resolution.
First claim
Opening claim text (preview).
We claim: 1. A polymer resin for vat photopolymerization, the polymer resin comprising: a polyamic diacrylate ester or salt thereof, the polyamic diacrylate ester or salt comprising a plurality of photocrosslinkable groups pendantly attached thereto; a photoinitiator suitable for initiating crosslinking of the photocrosslinkable groups when exposed to a light source of a suitable wavelength and intensity; and an organic solvent wherein the polyamic diacrylate ester comprises repeat units having a structure according to the following formula: 2. A polymer resin for vat photopolymerization, the polymer resin comprising: a polyamic diacrylate ester or salt thereof, the polyamic diacrylate ester or salt comprising a plurality of photocrosslinkable groups pendantly attached thereto; a photoinitiator suitable for initiating crosslinking of the photocrosslinkable groups when exposed to a light source of a suitable wavelength and intensity; and an organic solvent wherein the polyamic diacrylate ester comprises repeat units having a structure according to the following formula: 3. A polymer resin for vat photopolymerization, the polymer resin comprising: a polyamic diacrylate ester or salt thereof, the polyamic diacrylate ester or salt comprising a plurality of photocrosslinkable groups pendantly attached thereto; a photoinitiator suitable for initiating crosslinking of the photocrosslinkable groups when exposed to a light source of a suitable wavelength and intensity; and an organic solvent wherein the polyamic diacrylate ester comprises repeat units having a structure according to the following formula:
Assignees
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Classifications
Polybenzoxazoles · CPC title
the energy source being concentrated, e.g. scanning lasers or focused light sources · CPC title
containing chain terminating or branching agents · CPC title
Wholly aromatic polyimides containing oxygen in the form of ether bonds in the main chain · CPC title
containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds · CPC title
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- What does patent US11618832B2 cover?
- Polymer resins for the vat photopolymerization of thermoplastics are provided, in particular for the vat photopolymerization of thermoplastics with exception thermal stability and mechanical properties. In some aspects, the polymer resins are prepared by ring opening of an aromatic dianhydride with an alcohol containing an acrylate or methacrylate to produce a photocrosslinkable diacid monomer;…
- Who is the assignee on this patent?
- Virginia Tech Intellectual Properties Inc
- What technology area does this patent fall under?
- Primary CPC classification C09D11/101. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Apr 04 2023 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).