公开(公告)号：US4359567A

公开(公告)日：1982-11-16

申请号：US307991

申请日：1981-10-02

Applicant: Robert C. Evers

Inventor： Robert C. Evers

IPC: C08G73/22 ,  C08G75/32

CPC classification number: C08G73/22 ,  C08G75/32

Abstract: Articulated p-benzobisoxazole and p-benzobisthiazole polymers which contain a limited number of 3,3'-biphenyl or 2,2'-bipyridyl segments are synthesized, with inherent viscosities as high as 14 dl/g being recorded. The 3,3'-biphenyl or 2,2'-bipyridyl segments in the p-benzobisoxazole and p-benzobisthiazole polymers impart flexibility to the polymers without adversely affecting the thermooxidative stability. While the resultant articulated polymers exhibit liquid crystalline behavior in methanesulfonic acid and form strong cast films from that solvent, they also exhibit thermooxidative stability comparable to other p-benzobisthiazole and p-benzobisoxazole polymers. The resultant films are useful for the fabrication of high strength laminates to be used in severe environment structural applications.

Abstract translation: 合成含有有限数量的3,3'-联苯或2,2'-联吡啶链段的对映体异苯并双恶唑和对苯二双噻唑聚合物，其特性粘度高达14dl / g。 对苯并异恶唑和对苯二双噻唑聚合物中的3,3'-联苯或2,2'-联吡啶链段赋予聚合物柔韧性，而不会不利地影响热氧化稳定性。 虽然所得到的铰链聚合物在甲磺酸中表现出液晶性质，并从该溶剂形成强流延膜，但是它们还表现出与其它对苯二双噻唑和对苯并双恶唑聚合物相当的热氧化稳定性。 所得的膜可用于制造用于恶劣环境结构应用的高强度层压材料。

公开(公告)号：US4181681A

公开(公告)日：1980-01-01

申请号：US925899

申请日：1978-07-19

Applicant: Robert C. Evers ,  George J. Moore

Inventor： Robert C. Evers ,  George J. Moore

IPC: C07C205/22 ,  C07C91/44

CPC classification number: C07C205/22

Abstract: 2-Amino-4-ethynylphenol, a novel compound, is prepared by a four-step synthetic sequence in which the key reaction is the treatment of 4-acetoxy-3-nitroacetophenone with a Vilsmeier reagent derived from N,N-dimethylformamide and phosphorus oxychloride. The compound is useful as an endcapping agent in the synthesis of fluorocarbon ether bibenzoxazole oligomers which, because of the presence of acetylenic terminal groups, can be cured by thermal means to provide broad-use temperature, fuel and fluid resistant vulcanizates.

Abstract translation: 2-氨基-4-乙炔基苯酚，一种新型化合物，通过四步合成顺序制备，其中关键反应是使用衍生自N，N-二甲基甲酰胺和磷的Vilsmeier试剂处理4-乙酰氧基-3-硝基苯乙酮 氯氧化物 该化合物可用作合成氟碳醚联苯唑唑低聚物中的封端剂，由于存在炔末端基团，可以通过热法固化，以提供广泛使用的温度，耐燃料和耐流体性的硫化橡胶。

公开(公告)号：US4120900A

公开(公告)日：1978-10-17

申请号：US856385

申请日：1977-12-01

Applicant: Robert C. Evers ,  Tonson Abraham

Inventor： Robert C. Evers ,  Tonson Abraham

IPC: C08G73/22 ,  C07C91/44 ,  C08G23/00 ,  C08G65/40

CPC classification number: C07C205/26 ,  C08G73/22

Abstract: Fluorocarbon bis(o-aminophenol) compounds in which fluoroalkylene groups attached to each aminophenol radical are separated by a hydrocarbon moiety. The compounds are useful as monomers in preparing thermooxidatively and hydrolytically stable, low glass transition temperature perfluoroalkylene ether bibenzoxazole polymers containing hydrocarbon cure sites.

Abstract translation: 氟化碳双（邻氨基苯酚）化合物，其中连接到每个氨基苯酚基团的氟亚烷基被烃部分分离。 该化合物可用作制备热氧化和水解稳定性的单体，低玻璃化转变温度的含有烃固化位点的全氟亚烷基醚联苯唑聚合物。

公开(公告)号：US4115367A

公开(公告)日：1978-09-19

申请号：US817658

申请日：1977-07-21

Applicant: Robert C. Evers

Inventor： Robert C. Evers

IPC: C08G73/22

CPC classification number: C08G73/22

Abstract: Thermooxidatively and hydrolytically stable perfluoroalkylene ether bibenzoxazole polymers having improved viscoelastic properties are synthesized by the polycondensation of perfluoroalkylene ether bis(o-aminophenol) compounds with thioimidate esters derived primarily from tetrafluoroethylene oxide but end-capped with hexafluoropropylene oxide. Based on their lower glass transition temperature, the polymers have a very broad use temperature range which renders them particularly useful under severe environmental conditions encountered in aerospace elastomer applications such as seals and sealants.

Abstract translation: 通过全氟亚烷基醚双（邻氨基苯酚）化合物与主要由四氟乙烯氧化物衍生但用六氟环氧丙烷端封端的硫代亚硫酸酯酯的缩聚合成了具有改进的粘弹性的热氧化和水解稳定的全氟亚烷基醚联苯唑聚合物。 基于它们较低的玻璃化转变温度，聚合物具有非常广泛的使用温度范围，使得它们在航空弹性体应用如密封件和密封剂中遇到的恶劣环境条件下特别有用。

公开(公告)号：US4108884A

公开(公告)日：1978-08-22

申请号：US817657

申请日：1977-07-21

Applicant: Robert C. Evers

Inventor： Robert C. Evers

IPC: C07C59/315 ,  C07C119/18

CPC classification number: C07C59/315

Abstract: Perfluoroalkylene ether thioimidate esters derived primarily from tetrafluoroethylene oxide but end-capped with hexafluoropropylene oxide in the terminal positions of the perfluoroalkylene ether chain. The compounds are particularly useful as monomers to synthesize novel thermooxidatively and hydrolytically stable perfluoroalkylene ether bibenzozazole polymers having improved low temperature viscoelastic properties.

Abstract translation: 全氟亚烷基醚硫代亚氨酸酯酯主要由四氟乙烯氧化物衍生，但在全氟亚烷基醚链的末端位置用六氟环氧丙烷封端。 该化合物特别可用作合成具有改进的低温粘弹性性能的新的热氧化和水解稳定的全氟亚烷基醚联苯唑的聚合物。

公开(公告)号：US5264504A

公开(公告)日：1993-11-23

申请号：US917568

申请日：1992-07-20

Applicant: Robert C. Evers ,  My Dotrong

Inventor： Robert C. Evers ,  My Dotrong

IPC: C08G61/12 ,  C08G65/48 ,  C08G73/22 ,  C08G75/32 ,  C08L71/00 ,  C08F283/00

CPC classification number: C08G75/32 ,  C08G61/127 ,  C08G65/48 ,  C08G73/22 ,  C08L71/00 ,  C08L2205/05

Abstract: There are provided fusible, rod-like graft copolymers having repeating units of the formula: ##STR1## wherein a ranges from about 0.75 to 0.97 and b is 1-a; wherein Z is a benzbisoxazole or benzbisthiazole moiety, wherein Ar is a linear phenylene or polyphenylene moiety, wherein Ar' is ##STR2## and wherein Y is a poly(etherketone) or a poly(etheretherketone), wherein the poly(etherketone) has repeating units of the formula ##STR3## wherein Q is a divalent phenylene or substituted phenylene moiety and c is an integer having a value of 1 to 4, and the poly(etheretherketone) has repeating units of the formula ##STR4## wherein Q' is a divalent phenylene or substituted phenylene moiety, d is an integer having a value of 1 to 4 and e is an integer having a value of 2 to 5.Also provided are methods for making these graft copolymers.

Abstract translation: 提供了具有下式重复单元的可熔，棒状接枝共聚物：其中a为约0.75至0.97，b为1-a; 其中Z是苯并异恶唑或苯并噻唑部分，其中Ar是直链亚苯基或聚亚苯基部分，其中Ar'是＆lt; IMAGE＆gt;并且其中Y是聚（醚酮）或聚（醚醚酮），其中聚（醚酮）具有重复 其中Q是二价亚苯基或取代的亚苯基部分，c是1至4的整数，并且聚（醚醚酮）具有下式的重复单元：其中Q'是 二价亚苯基或取代的亚苯基部分，d是值为1〜4的整数，e是2〜5的整数。也提供了制造这些接枝共聚物的方法。

公开(公告)号：US5233017A

公开(公告)日：1993-08-03

申请号：US854731

申请日：1992-03-23

Applicant: My Dotrong ,  Robert C. Evers ,  Ronald C. Tomlinson ,  Mark Sinsky

Inventor： My Dotrong ,  Robert C. Evers ,  Ronald C. Tomlinson ,  Mark Sinsky

IPC: C08G75/32

CPC classification number: C08G75/32

Abstract: Benzobisthiazole polymers with thiophene moieties having repeating units of the formula:--Bt--(--Tp--).sub.n --wherein Bt is ##STR1## Tp is ##STR2## and n has a value of 1 to 3.

Abstract translation: 具有下列重复单元的噻吩部分的苯并二噻唑聚合物：-Bt - （ - Tp-）n - 其中Bt为Tpi，且n为1至3。

公开(公告)号：US4663425A

公开(公告)日：1987-05-05

申请号：US807426

申请日：1985-12-10

Applicant: Robert C. Evers ,  George J. Moore

Inventor： Robert C. Evers ,  George J. Moore

IPC: C08G69/32

CPC classification number: C08G69/32

Abstract: Aromatic polyamide resins having repeating units, each containing at least one m-ethynyl amido subunit: ##STR1## These resins can be thermally treated to undergo intra-molecular cyclization, without evolution of volatiles, into polyimidines containing the following subunit. ##STR2##

公开(公告)号：US4064109A

公开(公告)日：1977-12-20

申请号：US710088

申请日：1976-07-30

Applicant: Robert C. Evers

Inventor： Robert C. Evers

IPC: C08G73/22

CPC classification number: C08G73/22

Abstract: Perfluoroalkylene ether bibenzoxazole polymers are prepared by the polycondensation of perfluoroalkylene ether bis(o-aminophenol) compounds and perfluoroalkylene ether-imidate and -thioimidate esters synthesized by the reaction of certain perfluoroalkylene ether dinitriles with trifluoroethanol or ethanethiol. In addition to possessing high thermooxidative stability and good low temperature viscoelastic properties, the elastomeric polymers have a superior hydrolytic stability. This combination of properties renders the polymers particularly useful as seals and sealants in severe environments.

Abstract translation: 通过全氟亚烷基醚双（邻氨基苯酚）化合物和通过某些全氟亚烷基醚二腈与三氟乙醇或乙硫醇的反应合成的全氟亚烷基醚 - 亚氨酸酯和 - 亚硫酰亚胺酯的缩聚制备全氟亚烷基醚联苯唑聚合物。 除了具有高的热氧化稳定性和良好的低温粘弹性之外，弹性体聚合物具有优异的水解稳定性。 这种特性的组合使聚合物在恶劣环境中特别适用于密封和密封剂。

公开(公告)号：US4053498A

公开(公告)日：1977-10-11

申请号：US710089

申请日：1976-07-30

Applicant: Robert C. Evers

Inventor： Robert C. Evers

IPC: C08G73/22 ,  C07C83/10

CPC classification number: C08G73/22

Abstract: Hexafluoropropylene oxide-terminated perfluoroalkylene ether-imidate and -thioimidate esters are prepared by the reaction of certain perfluoroalkylene ether dinitriles with trifluoroethanol or ethanethiol. The compounds are useful as monomers in synthesizing thermooxidatively stable, low glass transition temperature perfluoroalkylene ether bibenzoxazole polymers with improved hydrolytic stability properties.