摘要:
The invention relates to a halogenated resin comprising chlorinated polyvinylchloride (CPVC) and a stabilizing composition comprising disodium adipate in an amount above 0.3 parts by weight per 100 parts of polymer (phr) and wherein the halogenated resin does not comprise tin stabilizers. A chlorinated polyvinylchloride article made of the halogenated resin, wherein the article has a Congo red stability ≥ 53 min, a VICAT softening temperature > 82°C and wherein the halogenated resin formulation has a time to fusion ≤ 78 sec.
摘要:
The present invention relates to a composition comprising (a) chlorinated polyvinyl chloride and (b) at least one ester of polyglycerol with at least one fatty acid and a process for producing said composition. The invention further relates to a use of said ester as lubricant and/or mold release agent for chlorinated polyvinyl chloride.
摘要:
The present invention discloses novel calibrants containing between 1 and 5 iodine atoms and methods of making them using linear polymers, hyperbranched polymers, and biological polymers (including but not limited to proteins and peptides.) Methods of using the calibrants are also disclosed, such as mass spectrometry. The novel calibrants disclosed herein have a more cost-and time-efficient synthesis than other calibrants.
摘要:
The present disclosure relates to an apparatus and a process for the preparation of chlorinated polyvinyl chloride (CPVC). The apparatus includes a chamber (16), at least one sparger tube (12), at least one agitator (2) and at least two baffles (18) fitted in the chamber and a plurality of irradiation sources (20) fitted inside the baffles in order to bring about accelerated photochlorination of polyvinyl chloride. The process includes reacting polyvinyl chloride (PVC) with chlorine in the presence of irradiation of wavelength ranging from 250 and 550 nm and power ranging from 0.01 to 0.04 Watt/ g of PVC, under agitation at a speed ranging from 100 to 1600 rpm, for a time period ranging from 2 to 12 hours, to obtain CPVC.