# US 2019/0055398 A1 · Thermoplastic polyester resin composition and molded article > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0055398 A1 - Document ID: US20190055398A1 - Status: Published application - Kind: A1 - Application number: 16/074,482 - Filed: 2017-01-19 - Published: 2019-02-21 - Earliest claimed: 2016-02-02 - Assignees: Toray Industries, Inc. - Applicants: Toray Industries, Inc. - Inventors: Yusuke Tojo; Makito Yokoe; Hideyuki Umetsu - Web page: https://patentgrep.com/patent/US20190055398A1 ## CPC - C08L 67/00: Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain (of polyester-amides C08L77/12; of polyester-imides C08L79/08); Compositions of derivatives of such polymers - C08L 67/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence) - C08K 5/49: Phosphorus-containing compounds {(C08K5/0091 takes precedence)} - C08L 63/00: Compositions of epoxy resins; Compositions of derivatives of epoxy resins - C08L 63/04: Epoxynovolacs - B29B 9/065: {under-water, e.g. underwater pelletizers} - B29K 2067/006: {PBT, i.e. polybutylene terephthalate} - B29K 2105/0044: {Stabilisers, e.g. against oxydation, light or heat} - C08L 2201/08: Stabilised against heat, light or radiation or oxydation - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - B29B: PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS - B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS ## Abstract A thermoplastic polyester resin composition is obtained by blending, per 100 parts by weight of (A) a thermoplastic polyester resin, 0.1 to 5 parts by weight of (B) a novolac type epoxy resin having a specific structure, and 0.05 to 10 parts by weight of (C) an epoxy compound having two epoxy functional groups per molecule. Thus, a molded article that exhibits superior melt stability with respect to a wide range of processing temperatures, has excellent mechanical properties and heat resistance, and exhibits superior long-term hydrolysis resistance, chemical resistance, and oxidative deterioration resistance can be obtained. ## Claims ### Claim at position 1 1-13. (canceled) ### Claim 14 A thermoplastic polyester resin composition comprising (A) 100 parts by weight of a thermoplastic polyester resin, (B) 0.05 to 5 parts by weight of a novolac type epoxy resin represented by general formula (1), and (C) 0.05 to 10 parts by weight of an epoxy compound in which number of epoxy functional groups per molecule is two: wherein, in general formula (1), X represents a bivalent group represented by general formula (2) or (3); in general formulae (1) and (3), R1, R2, R4, and R5 independently represent C1-C8 alkyl, or C6-C10 aryl and may be the same or different; R3 represents a hydrogen atom, C1-C8 alkyl or C6-C10 aryl; in general formula (1), n represents a value of 2 or more and equal to or smaller than 10; and, in general formulae (1) and (3), a, c, and d independently represent an integer from 0 to 4, and b represents an integer from 0 to 3. ### Claim 15 (depends on 14) The thermoplastic polyester resin composition according to claim 14, wherein a concentration of epoxy group is 30 to 150 eq/t. ### Claim 16 (depends on 14) The thermoplastic polyester resin composition according to claim 14, wherein a concentration of carboxyl group is 0 to 20 eq/t. ### Claim 17 (depends on 14) The thermoplastic polyester resin composition according to claim 14, wherein the compounded amount ratio of (C) the epoxy compound in which the number of epoxy functional groups per molecule is two to (B) the novolac type epoxy resin represented by general formula (1) is 0.5 to 4. ### Claim 18 (depends on 14) The thermoplastic polyester resin composition according to claim 14, wherein (C) the epoxy compound in which the number of epoxy functional groups per molecule is two is a bisphenol-A type epoxy resin. ### Claim 19 (depends on 14) The thermoplastic polyester resin composition according to claim 14, wherein (C) the epoxy compound in which the number of epoxy functional groups per molecule is two is a bisphenol-A type epoxy resin having an epoxy value of 300 to 3000 g/eq. ### Claim 20 (depends on 14) The thermoplastic polyester resin composition according to claim 14, further comprising (D) 0.01 to 1 part by weight of a reducing phosphorus compound represented by general formula (4), relative to (A) 100 parts by weight of the thermoplastic polyester resin: wherein, in general formula (4), R6 and R7 are independently selected from hydrogen (but there is no instance where both R6 and R7 are hydrogen), OM (wherein O is a negatively-charged oxygen atom and M is a positively-charged counterion), C1-C20 alkyl, C2-C20 alkylene, C6-C20 aryl, C1-C20 alkyloxy, polyoxyalkylene including C2-C4 alkylene, and C6-C20 aryloxy; the alkyl, alkylene, aryl, alkyloxy, polyoxyalkylene, and aryloxy may be optionally substituted, and the optional substituents are independently selected from OH group, halogen, COOH group, COOR8 group (wherein R8 is C1-C4 alkyl) and NH2 group; wherein, when the alkyl, alkylene, aryl, alkyloxy, polyoxyalkylene, and aryloxy are substituted, the number of substituents is 1 or 2; and R6 and R7 can be linked by cross-linking. ### Claim 21 (depends on 20) The thermoplastic polyester resin composition according to claim 20, wherein (D) the reducing phosphorus compound represented by general formula (4) is a metal phosphite or a metal hypophosphite. ### Claim 22 (depends on 14) The thermoplastic polyester resin composition according to claim 14, wherein (A) the thermoplastic polyester resin is polybutylene terephthalate. ### Claim 23 (depends on 14) The thermoplastic polyester resin composition according to claim 14, further comprising (E) 0.01 to 1 part by weight of a phosphoric stabilizer with respect to (A) 100 parts by weight of the thermoplastic polyester resin. ### Claim 24 (depends on 14) The thermoplastic polyester resin composition according to claim 14, further comprising (F) 1 to 100 parts by weight of a fibrous reinforcing filler with respect to (A) 100 parts by weight of the thermoplastic polyester resin. ### Claim 25 (depends on 14) The thermoplastic polyester resin composition according to claim 14, further comprising (G) 0.001 to 1 part by weight of a reaction accelerator with respect to (A) 100 parts by weight of the thermoplastic polyester resin. ### Claim 26 (depends on 14) A molded article melt-molded from the thermoplastic polyester resin composition according to claim 14.