Polyester compositions
AssigneeMitsubishi Rayon Co., Ltd.
InventorsTsuneo Kodama, Isao Sasaki, Hiroshi Mori
Life of this patent
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Abstract
Disclosed is a polyester composition obtained by blending, with a polyester comprising at least 80% by mole of ethylene terephthalate units, (1) an epoxy compound (A) having an isocyanuric acid ester construction or a cyanuric acid ester construction and at least one organic compound (B) capable of reacting with the epoxy group of said epoxy compound (A) and having one or more carboxyl, amino, isocyanate or hydroxyl groups or (2) a product of a melt reaction of said epoxy compound (A) with said organic compound (B), and then melt mixing and milling the blend. The polyester composition may comprise a fibrous filler and glass flakes, and has a high moldability and excellent physical properties.
Claims12
A polyester composition obtained by blending, with polyester comprising at least 80% by mole of ethylene terephthalate units, (1) an epoxy compound (A) selected from the group consisting of triglycidyl isocyanurate, N-methyl-N',N"-diglycidyl isocyanurate and triglycidyl cyanurate, in an amount of from 0.0005 to 0.02 mole per 100 g of said polyester, and at least one organic compound (B) capable of reacting with the epoxy group of said epoxy compound (A), selected from those having one or more carboxyl, amino, isocyanate or hydroxyl groups, in an amount of from 0.2 to 3.0 moles per mole of said epoxy compound (A), or (2) a product of a melt reaction of said epoxy compound (A) with said organic compound (B) at a compound (B)/compound (A) mole ratio of from 0.5 to 2.0 at a temperature of from 100.degree. to 200.degree. C. for a period of from 5 to 30 minutes, in such an amount that said epoxy compound (A) prior to said melt reaction is in an amount of from 0.0005 to 0.02 moles per 100 g of said polyester, and then melt mixing and milling the blend.
A polyester composition obtained by blending, with polyester comprising at least 80% by mole of ethylene terephthalate units, a product of a melt reaction of an epoxy compound (A) selected from the group consisting of triglycidyl isocyanurate, N-methyl, N',N"-diglycidyl isocyanurate and triglycidyl cyanurate with an aromatic compound (B) capable of reacting with the epoxy group of said epoxy compound (A) and having one or more carboxyl groups at a compound (B)/compound (A) mole ratio of from 0.5 to 2.0 at a temperature of from 100.degree. to 200.degree. C. for a period of from 5 to 30 minutes, in such an amount that said epoxy compound (A) prior to the melt reaction is in an amount of from 0.0005 to 0.02 moles per 100 g of said polyester, and glass fibers in an amount of from 10 to 50% by weight and glass flakes in an amount of 1 to 40% by weight, based on the total weight of the composition, and then, melt mixing and milling the blend.
Dependencies are inferred from the claim text.