Abstract:
Disclosed are polyesters derived from one or more aromatic dicarboxylic acids and a diol which includes at least 50 mol percent of 2,3-butanediol. The polyesters, prepared by the use of a tin catalyst, are high molecular weight polymers having an inherent viscosity of at least 0.4.
Abstract:
Bis-chlorocarbonic acid esters of diphenols react with aromatic dicarboxylic acids in the melt or in high-boiling, inert organic solvents, even in the absence of bases, such as tertiary amines for example, to form polyester carbonates.
Abstract:
An improved carboxyl-group-containing polyester resin composition as described of an aromatic carboxylic acid and an aliphatic diol having the following combination of properties: (a) an acid number between 10 and 26 mg KOH/g, (b) a hydroxyl number that is smaller than 15 mg KOH/g, (c) a theoretical number-average molecular weight between 4,500 and 12,500 and (d) a glass transistion temperature between 40.degree. and 85.degree. C.
Abstract:
Poly(ethylene terephthalate), poly(1,4-cyclohexanedicarboxylate), poly(ethylene isophthalate), poly(ethylene naphthalate), their copolymers with each other and with modifying aliphatic dicarboxylic acids, and substituted glycol repeat unit modifications thereof are produced from prepolymer (oligomer) obtained from the esterification of the acid or acids with ethylene carbonate or substituted ethylenecarbonate in the presence of one or more amines compounds selected from trialkylamines, tetraalkyldiamines, N-alkylated heterocyclic amines, and certain quaternary ammonium salts, employing certain mole ratios of ethylene carbonate and substituted ethylene carbonate to the diacid. The prepolymer is formed in an unusually short time and the final polyester of high I.V. exhibits improvement in such properties as desirable light color and low ether-glycol level.
Abstract:
A polyisophthalate such as poly(ethylene isophthalate) and copolymers thereof having high intrinsic viscosities as well as reduced ring dimer of ethylene isophthalate, and a process for making the same. A protonic acid catalyst is utilized along with intrinsic viscosity modifying agents during preparation of the polyisophthalate. The polymers produced have very high clarity, improved oxygen and carbon dioxide barrier resistance, high glass transition temperature, as well as increased molecular weights. They are thus suitable for use as materials in packaging or forming containers, such as bottles.
Abstract:
A modified polyethylene terephthalate molding material containing terephthalic acid as a major dicarboxylic acid component and ethylene glycol as a major glycol component, which contains 0.1 to 15 mol %, based on the total amount of said glycol component present, of 2-methyl-1,3-propanediol as part of said glycol component.
Abstract:
Pigmented thermosetting organic solvent solution coating compositions are disclosed which cure to provide improved weather resistance. These coating compositions contain three resin components, as follows:(1) an essentially nonfunctional organic solvent-soluble silicone resin reaction product of a low molecular weight hydroxy functional polyether with an hydroxy or alkoxy-functional organic polysiloxane, said polyether having an average molecular weight in the range of 300 to 4000 and an hydroxy functionality of at least about 3, said polysiloxane being present in an amount of from 8% to 20% of the weight of the three resin components, and said polyether and said polysiloxane being combined in approximately stoichiometric proportions;(2) a reactive organic solvent-soluble essentially linear high molecular weight hydroxy functional polyester constituting the balance of the three resin components; and(3) from 3% to 15% of the three resin components of a heterocyclic aminoplast resin for curing the reactive polyester.Components 1 and 2 are compatible in the solution and at least partially incompatible in a film as the solvent evaporates, so that component 1 can concentrate at the surface to enhance the weather resistance.
Abstract:
High molecular weight thermotropic copolyesters are disclosed which can be shaped. These copolyesters consist or consist essentially of units of the formulae:(--O--X.sub.1 --O--).sub.a, (--O--X.sub.2 --O--).sub.b, (--O--X.sub.3 --O--).sub.c, --CO--Y--CO-- or --CO--Z--CO--,in which: X.sub.1 represents a monosubstituted para-phenylene radical; X.sub.2 represents an unsubstituted 1,4-phenylene radical; and X.sub.3 represents a disubstituted para-phenylene radical, a 4,4'-diphenylene radical or a p,p'-diphenylene ether radical, where 0.4.ltoreq.a.ltoreq.1, O.ltoreq.b.ltoreq.0.6, O.ltoreq.c.ltoreq.0.1 and a+b+c=1; Y represents a 1,4-cyclohexylene radical, a radical having two phenylene groups joined to one another by a single bond or an acyclic chain, or a divalent aromatic radical having at least two fused phenyl nuclei; and Z represents a radical --(CH.sub.2).sub.n --, in which 3.ltoreq.n.ltoreq.10, the molar ratio Z/Y+Z being between 0.2 and 0.5. These copolyesters may be made up into molded articles, threads, films, etc.
Abstract translation:公开了可以成形的高分子量热致变共聚酯。 这些共聚酯基本上由下式的单元组成:(-O-X1-O-)a,( - O-X2-O-)b,(-O-X3-O-)c,-CO-Y- CO-或-CO-Z-CO-,其中:X1表示单取代的对 - 亚苯基; X2表示未取代的1,4-亚苯基; 并且X 3表示二取代的对亚苯基,4,4'-二亚苯基或者ap,p'-二亚苯基醚基,其中0.4≤i≤0.0,O = = c = 0.1和a + b + c = 1; Y表示1,4-亚环己基,具有通过单键或无环链彼此连接的两个亚苯基的基团或具有至少两个稠合苯基核的二价芳族基团; Z表示基团 - (CH 2)n - ,其中3≤n≤10,Z / Y + Z的摩尔比在0.2和0.5之间。 这些共聚酯可以制成模塑制品,丝线,薄膜等。
Abstract:
Copolyesters formed from 1,4-butanediol and a dicarboxylic acid mixture of, relative to the polyester, 8-12 mol % of sebacic acid or of an amount equal by weight of a saturated aliphatic dicarboxylic acid having 6 to 36 C atoms, 26-32 mol % of terephthalic acid and 7.5 to 12 mol % of isophthalic acid are hot melt adhesives which are characterized by resistance to ageing even at elevated temperatures, good adhesive strength and a relatively high heat resistance of the bonded areas.