Polyester resins

IPC classes for russian patent Polyester resins (RU 2561736):

C08L67/00 - Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain (of polyester-amides C08L0077120000; of polyester-imides C08L0079080000); Compositions of derivatives of such polymers

C08G63/16 - Dicarboxylic acids and dihydroxy compounds

C08G63/12 - derived from polycarboxylic acids and polyhydroxy compounds

FIELD: chemistry.

SUBSTANCE: present invention relates to polyesters. Polyester AB is described, it containes fragments derived from di- or polyfunctional organic acid compounds A, and fragments derived from di- or polyfunctional organic hydroxy compounds B, where compounds A include a fraction of a substance a₁ in amount of a₁₁ to a₁₂ for at least one acid compound A1 and a fraction of a substance a₂ in amount of a₂₁ to a₂₂ for at least one acid compound A2, and where compounds B include a fraction of a substance b₁ in amount of b₁₁ to b₁₂ for at least one hydroxy functional compound B1 and a fraction of a substance b₂ in amount of b₂₁ to b₂₂ for at least one hydroxy functional compound B2, where at least one of each of the fragments of compounds A1, A2, B1 and B2 is present, and at least two compounds corresponding to A2, or at least two compounds corresponding to B2 are present, where the acid compounds A1 and A2 and the hydroxy functional compounds B1 and B2 are defined as follows: group A1 of acid compounds includes organic diacic compounds having two acid groups per molecule, and organic polyacid compounds having three or more acid groups per molecule, which are selected from a group which includes isophthalic acid, trimellitic anhydride, hexahydrophthalic anhydride, cyclohexane-1,4-dicarboxylic acid and tetrahydrophthalic acid, and group A2 of acid compounds includes organic diacid compounds having two acid groups per molecule, and organic polyacid compounds having three or more acid groups per molecule, which are selected from a group which includes adipic acid, dimeric fatty acids and sebacic acid, where the acid groups are carboxyl groups -COOH, and where two adjacent acid groups, i.e. acid groups which are linked by carbon atoms directly bonded to each other, can be partially or completely substituted with a corresponding acid anhydride group, and group B1 of hydroxy functional compounds includes organic dihydroxy compounds having two hydroxyl groups per molecule, and organic polyhydroxy compounds having three or more hydroxyl groups per molecule, which are selected from a group which includes trimethylol propane, 1,2-bishydroxymethylcylcohexane and 1,2-dihydroxypropane, and group B2 of hydroxy functional compounds includes organic dihydroxy compounds having two hydroxyl groups per molecule, and organic polyhydroxy compounds having three or more hydroxyl groups per molecule, which are selected from a group which includes 1,4-butanediol, 1,6-hexanediol, 2,2'-dihydroxydiethyl ether and 1,2-bis(2-hydroxypropoxy)propane. Method of using said polyester to produce a coating.is also described.

EFFECT: obtaining a polyester characterised by good elasticity, impact viscosity and adhesion, as well as sufficient hardness with respect to wearing and indentation.

14 cl, 2 tbl, 22 ex

IPC classes for russian patent Polyester resins (RU 2561736):

C08G63/16 - Dicarboxylic acids and dihydroxy compounds

C08G63/12 - derived from polycarboxylic acids and polyhydroxy compounds

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