Patent application EP19195558A (EP), filed 2019-09-05
Publication number: EP3747947A1
Title: THERMOSETTING COMPOSITE RESIN COMPOSITION HAVING SUPERIOR SURFACE SMOOTHNESS AND MECHANICAL PROPERTIES AND METHOD OF MANUFACTURING AUTOMOBILE SHELL PLATE USING SAME
Abstract: Disclosed is a thermosetting composite resin composition including a thermosetting resin, particularly an unsaturated polyester resin, a low-profile additive and an inorganic filler, and to a method of manufacturing an automobile shell plate using the same. The thermosetting composite resin composition can be used to manufacture not only automobile shell plates having low specific gravity and superior surface smoothness and mechanical properties but also structural parts such as interior parts for airplanes or railways.
IPC codes: C08L  67/    06            A I
Claims: number: 1
text: A thermosetting composite resin composition, comprising:
number: 2
text: The thermosetting composite resin composition of claim 1, further comprising:
number: 3
text: The thermosetting composite resin composition of claim 2, comprising:
number: 4
text: The thermosetting composite resin composition of any one of claims 1 to 3, wherein the thermosetting resin comprises a polymer of propylene glycol, neopentyl glycol and an acid, and
a weight ratio of the propylene glycol, the neopentyl glycol and the acid is about 2.5 to 4.5 : 1: 4.5 to 6.5.
number: 5
text: The thermosetting composite resin composition of any one of claims 1 to 3, wherein the thermosetting resin comprises an unsaturated polyester resin having a degree of unsaturation of about 47 to 50%.
number: 6
text: The thermosetting composite resin composition of any one of claims 1 to 5, wherein the low-profile additive comprises epoxy and one or more selected from the group consisting of saturated polyester, polyvinyl acetate (PVAc), and polyurethane (PU).
number: 7
text: The thermosetting composite resin composition of any one of claims 1 to 6, wherein the inorganic filler is surface-treated with a silane compound.
number: 8
text: The thermosetting composite resin composition of claim 7, wherein the silane compound comprises one or more selected from the group consisting of ester-silane, amino-silane, and methacryl-silane.
number: 9
text: The thermosetting composite resin composition of any one of claims 1 to 6, wherein the inorganic filler comprises one or more selected from the group consisting of glass bubbles, calcium carbonate (CaCO<3>), and aluminum hydroxide (Al(OH)<3>);
wherein the inorganic filler has a compressive strength of about 6000 to 6300 psi.
number: 10
text: The thermosetting composite resin composition of any one of claims 1 to 9, further comprising an additive comprising a dispersant, a separation inhibitor or combinations thereof.
number: 11
text: The thermosetting composite resin composition of any one of claims 2 to 10, wherein the thickening agent comprises a magnesium oxide (MgO), wherein the magnesium oxide is in a form of power or paste.
number: 12
text: The thermosetting composite resin composition of any one of claims 2 to 11, wherein the fibrous reinforcement comprises a glass fiber.
number: 13
text: A method of manufacturing an automobile shell plate, comprising:
number: 14
text: The method of claim 13, wherein the automobile shell plate has a specific gravity of about 1.27 to 1.37, a tensile strength of 65 to 90 MPa, a tensile modulus of 8.0 to 9.0 GPa, an elongation of 1.35 to 1.5%, a flexural strength of 180 to 200 MPa, or a flexural modulus of 8.5 to 10 GPa, a long-term waviness (LTW) of 8 to 15.
Office action: search_report, dated 2020-12-09
Rejection reasons: novelty_epc_54
inventive_step_epc_56
Prior art cited: ref_id: US2003065057A1
ref_type: patent
severity: background
ref_id: US2003199625A1
ref_type: patent
severity: background
ref_id: WO2019023301A1
ref_type: patent
severity: background
ref_id: US2003065057
ref_type: patent
severity: novelty_destroying
ref_id: US2003199625
ref_type: patent
severity: novelty_destroying
ref_id: WO2019023301
ref_type: patent
severity: novelty_destroying
Final disposition: pending (2020-12-09)