摘要:
Partially unsaturated polymers are dissolved in a two component solvent comprising a first component having a reactivity toward ozone less than carbon-carbon double bonds but more reactive than carbon-carbon single bonds and a second component being inert toward ozone. Introduction of ozone into the solution produces ozonides which are readily cleft into difunctional aliphatic species that can be converted to e.g. carboxy-terminated or multifunctional carboxy substituted aliphatic compounds. These may be used as monomeric species in various polymerization schemes as such, in preparation of polyamides, for example, or may be reduced to aldehydes or alcohols to be used in the preparation of such polymers as polyesters, polyurethanes, poly (Schiff bases), etc. The carboxylated products may also be employed as ionomers, which are useful as surfactants. Monocarboxyl terminated polyethylene having a number average molecular weight of from about 4,000 to 100,000 are provided. Poly(carboxymethyl) substituted polyethylenes, wherein from about 0.05 to 1.3 percent of the hydrogen atom or polyethylene are substituted with carboxymethyl groups, are obtained.
摘要:
Novel copolyester-polyepoxide compositions possessing a high green strength and tack before curing and characterized by having a single discernible glass transition temperature are produced. The compositions are composed of a copolyester and a polyepoxide mixture containing high, intermediate and low molecular weight components. They are especially useful as gap-filling adhesives and for various other adhesive applications. Methods of preparation are also described.
摘要:
This invention relates to a branched fractal three dimensional porous polymer species which comprises rigid aromatic recurring units having electrophilic or nucleophilic reactive moieties on the exterior thereof. Another aspect of this invention relates to a star polymer comprising a polymeric core formed of the fractal polymers (FPS) of this invention having linear polymeric moieties grafted to the exterior thereof by way of residues formed by reaction between the reactive moieties on the exterior of the fractal polymer (FP) and complimentary reactive moieties on a linear polymer. Yet another aspect of this invention relates to polymeric composites comprising a polymer matrix having dispersed therein the star polymers of this invention.
摘要:
Copolymer compositions derived from (a) perfluroalkylalkyl acrylate or methacrylate, (b) acrylic, methacrylic or itaconic acid, and (c) a hydroxyl-containing acrylate or methacrylate, in combination, can be cross-linked through internal esterification or anhydride formation. These product combine properties typical of fluorine-containing polymers with processability, including processability from solution.
摘要:
Solid bodies having a reflective surface are provided with an anti-reflection coating of a terpolymer composition derived from (a) perfluoroalkylalkyl acrylate or methacrylate, (b) acrylic, methacrylic or itaconic acid, and (c) hydroxyl- containing acrylate or methacrylate.
摘要:
A process for forming extended chain polyesters and block or graft polyesters or copolyesters which comprises the steps of (a) forming an intimate mixture of one or more polyesters, and an effective amount of one or more chain extension reagents, which are phosphorous (III)-containing compounds, and (b) heating said mixture for a time and at a temperature sufficient to form said extended chain, or graft or block copolyester or polyester; wherein the polyester used in step (a) contains no or substantially no substances which comprise elements from groups VA and VIA of the periodic table in elemental form; and wherein preferably, said polyesters conatain one or more elements belonging to groups IIA, IIIA, IVA, VB, IIB, IIIB, IVB, VIII and the lanthanides.
摘要:
This invention relates to a composition comprising a linear, saturated polyester, such as poly(ethylene terephthalate), containing between about 4% and about 10% by weight of the poly(ethylene terephthalate) of a hydrocarbon carboxylic acid and/or an organic polymer containing pendant acid carboxyl groups, where the acid groups are neutralized by a first cation selected from Group IA of the Periodic Table of Elements and a second cation selected from Groups IIIA, IIIB and IVB. The first cation is present in an amount less than 50% of the total metal ions and neutralizes not more than 20% of the hydrocarbon acid groups or carboxylic acid groups of the organic polymer. The second cation neutralizes up to 100% of the remaining hydrocarbon acid or carboxyl acid groups. Preferably, the first cation is sodium and the second cation is aluminum. The composition can contain up to about 150% filler and a suitable plasticizer.
摘要:
This invention relates to polymeric interpenetrating blends comprising a polymer matrix having dispersed therein a branched fractal three dimensional polymer species which comprises rigid aromatic recurring units linked by electrophilic or nucleophilic reactive moieties or derivatives thereof.
摘要:
Solid bodies having a reflective surface are provided with an anti-reflection coating of a fluoropolymer blends of (1) a terpolymer composition derived from (a) perfluoroalkylalkyl acrylate or methacrylate, (b) acrylic, methacrylic or itaconic acid, and (c) hydroxyl-containing acrylate or methacrylate; and (2) an amorphous fluoropolymer.