OMNIPHOBIC POLYURETHANE COMPOSITIONS, RELATED ARTICLES, AND RELATED METHODS

The disclosure relates to a thermoset omniphobic composition, which includes a thermoset polymer with first, second, and third backbone segments, urethane groups linking the first and third backbone segments, and urea groups linking the first and second backbone segments. The first, second, and third backbone segments generally correspond to urethane or urea reaction products of polyisocyanate(s), amine-functional hydrophobic polymer(s), and polyol(s), respectively. The thermoset omniphobic composition has favorable omniphobic properties, for example as characterized by water and/or oil contact and/or sliding angles. The thermoset omniphobic composition can be used as a coating on any of a variety of substrates to provide omniphobic properties to a surface of the substrate. Such omniphobic coatings can be scratch resistant, ink/paint resistant, dirt-repellent, and optically clear. The thermoset omniphobic composition can be applied by different coating methods including cast, spin, roll, spray and dip coating methods. 1. A thermoset omniphobic composition comprising: (i) first backbone segments,', '(ii) second backbone segments,', '(iii) third backbone segments,', '(iv) urethane groups linking the first backbone segments and the third backbone segments, and', '(v) urea groups linking the first backbone segments and the second backbone segments;, 'a thermoset polymer comprising a crosslinked backbone, the crosslinked backbone comprising the first backbone segments have a structure corresponding to at least one of a urethane reaction product and a urea reaction product from at least one polyisocyanate,', {'sub': 'g', 'the second backbone segments have a structure corresponding to a urea reaction product from at least one amine-functional hydrophobic polymer having a glass transition temperature (T) of 50° C. or less,'}, 'the third backbone segments have a structure corresponding to a urethane reaction product from at least one polyol,', 'the urethane groups have a ...

POLYMER COMPOSITIONS COMPRISING COMPOUNDS DERIVED FROM BIOLOGY

A compound comprises a moiety selected from a cyclic dimer of a first and a second amino acid or a 2.5-diketopiperazine made from an amino acid. The moiety can be produced by fermentation. The compound further includes a polymerizable group. Additionally, the disclosure includes a method for preparing a resin comprises reacting the compound comprising the foregoing moiety and polymerizable group with a reagent. 1. A compound comprising a moiety , the moiety includinga cyclic dimer of a first and a second amino acid, anda polymerizable group.2. The compound according to claim 1 , wherein the polymerizable group is selected from a vinyl group claim 1 , an allyl group claim 1 , an epoxy group claim 1 , or a combination thereof.3. The compound according to claim 1 , wherein at least 35 wt % claim 1 , at least 40 wt % claim 1 , at least 45 wt % claim 1 , at least 50 wt % claim 1 , at least 55 wt % claim 1 , at least 60 wt % claim 1 , at least 65 wt % claim 1 , at least 70 wt % claim 1 , at least 75 wt % claim 1 , at least 80 wt % claim 1 , or at least 85 wt % comprises the moiety.4. The compound according to claim 1 , wherein at least 60 wt % claim 1 , at least 65 wt % claim 1 , at least 70 wt % claim 1 , at least 75 wt % claim 1 , at least 80 wt % claim 1 , at least 85 wt % claim 1 , or at least 88 wt % comprises a sum of the moiety and the polymerizable group.6. A method for preparing a resin comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'reacting a compound according to with a reagent.'}7. The method according to claim 6 , wherein the compound comprises OH groups and the reacting is initiated at a ratio of moles of OH groups per moles of reagent ranging from 10:1 to 1:1.8. The method according to claim 6 , wherein the reagent is selected from epichlorohydrin claim 6 , epibromohydrin claim 6 , allyl halides claim 6 , vinyl halides claim 6 , unsaturated acids claim 6 , or any combination thereof.9. The method according to claim 8 , wherein the reagent is ...

Omniphobic polyurethane compositions, related articles, and related methods

The disclosure relates to a thermoset omniphobic composition, which includes a thermoset polymer with first, second, and third backbone segments, urethane groups linking the first and third backbone segments, and urea groups linking the first and second backbone segments. The first, second, and third backbone segments generally correspond to urethane or urea reaction products of polyisocyanate(s), amine-functional hydrophobic polymer(s), and polyol(s), respectively. The thermoset omniphobic composition has favorable omniphobic properties, for example as characterized by water and/or oil contact and/or sliding angles. The thermoset omniphobic composition can be used as a coating on any of a variety of substrates to provide omniphobic properties to a surface of the substrate. Such omniphobic coatings can be scratch resistant, ink/paint resistant, dirt-repellent, and optically clear. The thermoset omniphobic composition can be applied by different coating methods including cast, spin, roll, spray and dip coating methods.

Dual-band antenna systems

Dual-band antenna systems and methods of fabricating and using the same are provided. A tunable dual-polarization (left-hand circular polarized (LHCP) and right-hand circular polarized (RHCP)) antenna can be used both for L-band (1.215 gigahertz (GHz)-1.85 GHz) and Ka-band (32.3 GHz-34.2 GHz) operation. The antenna system can be an embedded antenna system, which can be used for 3U CubeSats, with full polarization diversity able to operate in two widely spaced frequency bands (L-band and Ka-band) of the spectrum. The antenna system can include three layers, including a top substrate, a bottom substrate, and a ground plane disposed between the top substrate and the bottom substrate.

Catechol modifiers for epoxy adhesives

The present disclosure provides epoxy adhesive compositions with increased adhesion to surfaces, including metal surfaces, comprising a catechol modifier and methods of use thereof.

Silver nano wire and noble-metal coated silver nano wire conductive polymer composites with low loading percolation conduction

Composite materials with noble metal coated silver nanowires loaded into polymer are described. The composite materials may have resistivities of no more than about 100 Ohm-cm, or from about 100 Ohm-cm to about 1 x 10 11 Ohm-cm depending on the amount of noble metal coated silver nanowires loaded into the polymer. The noble metal coated silver nanowires may be platinum coated silver nanowires. Metal particulates such as silver flakes or silver particles may be added to the composite materials in order to obtain desired properties. Composite precursor compositions and methods for preparing the composite materials are described.

Novel bio-based compound, method of forming the compound, and adhesive compositions containing the novel compound

A compound can have a structure of formula (1) or formula(2): [insert figure] with R1, R2 being independently H, or alkyl, or alkylaryl, or X1, or X2; X1, X2 independently being [insert figure], [insert figure], [insert figure], or [insert figure]; and Y1 being C1-C5 alkyl or isoalkyl; Y3 being H or C1-C3 alkyl; and n being 1-10. The compound can be included in an adhesive composition to adjust a desired property profile of the adhesive.

Polymer compositions comprising compounds derived from biology

A compound comprises a moiety selected from a cyclic dimer of a first and a second amino acid or a 2.5-diketopiperazine made from an amino acid. The moiety can be produced by fermentation. The compound further includes a polymerizable group. Additionally, the disclosure includes a method for preparing a resin comprises reacting the compound comprising the foregoing moiety and polymerizable group with a reagent.

Omniphobic polyurethane compositions, related articles, and related methods

The disclosure relates to a thermoset omniphobic composition, which includes a thermoset polymer with first, second, and third backbone segments, urethane groups linking the first and third backbone segments, and urea groups linking the first and second backbone segments. The first, second, and third backbone segments generally correspond to urethane or urea reaction products of polyisocyanate(s), amine-functional hydrophobic polymer(s), and polyol(s), respectively. The thermoset omniphobic composition has favorable omniphobic properties, for example as characterized by water and/or oil contact and/or sliding angles. The thermoset omniphobic composition can be used as a coating on any of a variety of substrates to provide omniphobic properties to a surface of the substrate. Such omniphobic coatings can be scratch resistant, ink/paint resistant, dirt-repellent, and optically clear. The thermoset omniphobic composition can be applied by different coating methods including cast, spin, roll, spray and dip coating methods.

Polymer compositions comprising compounds derived from biology

A compound comprises a moiety selected from a cyclic dimer of a first and a second amino acid or a 2.5-diketopiperazine made from an amino acid. The moiety can be produced by fermentation. The compound further includes a polymerizable group. Additionally, the disclosure includes a method for preparing a resin comprises reacting the compound comprising the foregoing moiety and polymerizable group with a reagent.

Polymer compositions comprising compounds derived from biology

A compound comprises a moiety selected from a cyclic dimer of a first and a second amino acid or a 2.5-diketopiperazine made from an amino acid. The moiety can be produced by fermentation. The compound further includes a polymerizable group. Additionally, the disclosure includes a method for preparing a resin comprises reacting the compound comprising the foregoing moiety and polymerizable group with a reagent.

Polymer compositions comprising compounds derived from biology

Silver nano wire and noble-metal coated silver nano wire conductive polymer composites with low loading percolation conduction

Composite materials with noble metal coated silver nanowires loaded into polymer are described. The composite materials may have resistivities of no more than about 100 Ohm-cm, or from about 100 Ohm-cm to about 1 x 1011 Ohm-cm depending on the amount of noble metal coated silver nanowires loaded into the polymer. The noble metal coated silver nanowires may be platinum coated silver nanowires. Metal particulates such as silver flakes or silver particles may be added to the composite materials in order to obtain desired properties. Composite precursor compositions and methods for preparing the composite materials are described.

Silver nanowire and noble-metal coated silver nanowire conductive polymer composites with low loading percolation conduction

Composite materials with noble metal coated silver nanowires loaded into polymer are described. The composite materials may have resistivities of no more than about 100 Ohm-cm, or from about 100 Ohm-cm to about 1×1011 Ohm-cm depending on the amount of noble metal coated silver nanowires loaded into the polymer. The noble metal coated silver nanowires may be platinum coated silver nanowires. Metal particulates such as silver flakes or silver particles may be added to the composite materials in order to obtain desired properties. Composite precursor compositions and methods for preparing the composite materials are described.