摘要:
Process for preparing essentially uncrosslinked hyperbranched, water-soluble or water-dispersible polyesters from dicarboxylic acids and polyether polyols having at least 3 OH groups. Water-soluble hyperbranched polyesters which are obtainable by such a process and their use for producing printing inks, adhesives, coatings, paints and varnishes.
摘要:
A reaction product comprises a polyester-polycarbonate comprising a polyester unit and a polycarbonate unit, a polycarbonate polymer, and a transesterification catalyst. The reaction product has a haze of less than 1.7% as measured at a thickness of 3.2 mm according to ASTM D1003-00. A thermoplastic composition comprising the reaction product and articles formed from therefrom are disclosed. A method of forming the reaction product is also disclosed.
摘要:
Absorbable heterochain polymers carrying acid or basic groups, capable of ionic conjugation with basic or acidic bioactive agents, respectively, are produced by free-radical addition of unsaturated functional monomers onto absorbable liquid polymers and subsequent generation of reactive functionality or by direct copolymerization of a carboxylic initiator with cyclic monomers to produce liquid carboxyl-bearing copolyesters or polyester carbonates.
摘要:
The present invention relates to a series of novel silicone polyesters which are prepared by crosslinking an alkyl dimethicone copolyol with a dimer acid. The reaction of the alkyl dimethicone copolyol and dimer acid results in a polyester having affinity to oils and that is highly lubricious on hair, skin and textile fiber.
摘要:
The present invention relates to an isophthalic acid rich carboxyl functionalised polyester, containing linear chain aliphatic (poly)ether diols, and to thermosetting powder compositions comprising a mixture of the polyester with a β-hydroxylkylamide group containing cross-linking agent. The invention also relates to the use of said compositions for the preparation of powdered paints and varnishes for the making of coatings and to coatings obtained therewith.
摘要:
The polymerization of polar vinyl monomers in the presence of Lewis acids produces stereoregular vinyl polymers. Polar vinyl monomers may be mixed with Lewis acids to form associations or complexes between the monomers and Lewis acids. The mixtures or monomer-Lewis acid complexes may be polymerized to produce the desire stereoregular vinyl polymers.
摘要:
There are provided a polyester fiber which maintains fiber properties such as heat resistance and strength and elongation possessed by a common polyester fiber, has excellent flame retardance, setting properties, transparence, devitrification resistance, stickiness reduction, and combing properties required for artificial hair, and has luster controlled according to need, and artificial hair using the same. Specifically, the present invention relates to a flame retardant polyester fiber for artificial hair, which is obtained by melt spinning a composition as a mixture of 100 parts by weight of (A) a polyester made of one or more of polyalkylene terephthalate and a copolymer polyester comprising polyalkylene terephthalate as a main component with 5 to 30 parts by weight of (B) a brominated epoxy flame retardant. The present invention also relates to the polyester fiber for artificial hair which has at least one modified cross-section, is a mixture with a fiber having a modified cross-section, and has a mixing ratio of the fiber having a round cross-section to the fiber having a modified cross-section is 8:2 to 1:9, and to the flame retardant polyester fiber for artificial hair which further comprises a hydrophilic fiber treating agent attached thereto, and thus has excellent smooth feeling, combing properties, and flame retardance.
摘要:
Polymers of the formula wherein x is 0 or 1, R1-4 are alkyl, aryl, arylalkyl, or alkylaryl groups, X1-4 are halogens, a′, b′, c′, and d′ are 0–4, UE is an unsaturated ester group, e, f, g, and h are 0–4, at least one of e, f, g, and h is ≧1 in at least some monomers, SE is a saturated ester group, i, j, k, and m are 0–4, at least one of i, j, k, and m is ≧1 in at least some monomers, a′+e+i≦4, b′+f+j≦4, c′+g+k≦4, d′+h+m≦4, RX represents the total number of haloalkyl groups in the polymer, the ratio of UE groups to SE groups to RX groups in the polymer is υε:σε:ρχ wherein υε is from about 1 to about 99.99, wherein σε is from about 0.01 to about 99, wherein ρχ is from 0 to about 50, and wherein υε+σε+ρχ=100.
摘要:
Disclosed is a profile-extruded multilayer structure comprising a polyester composition comprising from about 0.005 to about 7 mole % of a sulfonic acid comonomer or a salt thereof such as structures comprising at least one polyamide layer and at least one layer of a sulfonic acid-derived copolymer; structures comprising at least one polyester layer and at least one layer of a sulfonic acid-derived copolymer; structures comprising at least one polyamide layer, at least one layer of a sulfonic acid-derived copolymer and at least one polyester or polycarbonate layer. Also disclosed are shaped articles comprising these multilayer structures, commonly referred to as profiles. Such profiles are useful, for example, as tubing.