Process for producing homopolymers or copolymers of vinyl or vinylidene halides by emulsion polymerization
申请人:The B.F. GOODRICH Company
公开号:EP0007641A2
公开(公告)日:1980-02-06
The present invention relates to a process for preparing vinyl dispersion resins by conducting the polymerization reaction of the vinyl monomer or monomers in an aqueous alkaline medium, using an oil-soluble polymerization initiator, at temperatures preferably below about 48°C, in the presence of an emulsifier system comprising the ammonium salt of a high fatty acid containing from 8 to 20 carbon atoms, at least one long straight chain alcohol containing from 14 to 24 carbon atoms, and a sulfate or sulfonate type soap of C12 to C20 alkyl or aryl hydrocarbons, wherein the ratio of alcohol to emulsifier is equal to or greater than 1.0 and wherein the reaction ingredients are thoroughly mixed, and preferably homogenized, prior to polymerization. The process produces paste reins having improved plastisol foam properties, especially when sodium metabisulfite is added to the polymer recipe or the polymer slurry prior to spray drying. Further, polymer buildup in the reactor is substantially reduced and multiple polymerizations can be run in the reactor without opening the same.
Process for producing elastomeric particles free of agglomeration
申请人:The B.F. GOODRICH Company
公开号:EP0026484A2
公开(公告)日:1981-04-08
This invention relates to a process of producing elastomeric particles, such as those of natural and synthetic powdered and crumb rubbers and to the compositions prepared in accordance with such process. Specifically, the invention comprises encapsulating the elastomeric particles with a coating or film of a preplasticized vinyl resin, such as, for example, polymers and copolymers of vinyl and vinylidene halides and the like. The resultant composite particles are free-flowing and free of irreversible agglomeration and can be used in dry-blending with other materials priorto being formed into useful articles.
Nucleus-fluorinated aromatic carboxylates and processes for their production
申请人:ASAHI GLASS COMPANY LTD.
公开号:EP0355774A2
公开(公告)日:1990-02-28
A process for producing nucleus-fluorinated aromatic carboxylates, which comprise nucleus-fluorinating aromatic carboxylates of the following formula (1) with a fluorinating agent to obtain nucleus-fluorinated aromatic carboxylates of the following formula (2):
wherein R¹ is an alkyl group, an aryl group or a fluoroalkyl group, each of A and B is at least one member selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group, an aryl group and a fluoroalkyl group, and n and m are integers satisfying m + n = 6, provided that m is 1 or 2, provided that at least one A is an activated chlorine or bromine atom, and B corresponding to such an activated chlorine or bromine atom is a fluorine atom.
一种生产核-氟化芳香族羧酸盐的工艺,包括用氟化剂对下式(1)的芳香族羧酸盐进行核-氟化,得到下式(2)的核-氟化芳香族羧酸盐:
其中 R¹ 是烷基、芳基或氟烷基,A 和 B 中的每一个至少是选自氢原子、卤素原子、烷基、芳基和氟烷基组成的组中的一个成员,n 和 m 是满足 m + n = 6 的整数,条件是 m 是 1 或 2,条件是至少一个 A 是活化的氯原子或溴原子,与该活化的氯原子或溴原子对应的 B 是氟原子。
Polyester composition
申请人:IMPERIAL CHEMICAL INDUSTRIES PLC
公开号:EP0395237A1
公开(公告)日:1990-10-31
A polyester composition, and article formed therefrom, comprises a synthetic thermoplastic polyester and from 0.5 to 30% by weight of the composition of at least one aromatic ester of molecular weight not exceeding 1000.
A thermal transfer printing receiver sheet for use in association with a compatible donor sheet. The receiver sheet comprises a supporting substrate having a dye-receptive receiving layer to receive a dye thermally transferred from the donor sheet. The receiving layer comprises a polyester resin containing a hydrocarbyl group comprising a carbon chain containing greater than 7 carbon atoms.