THERMALLY EXPANDABLE COMPOSITIONS COMPRISING AN ENDOTHERMIC BLOWING AGENT

    公开(公告)号:US20220403128A1

    公开(公告)日:2022-12-22

    申请号:US17624061

    申请日:2020-08-17

    摘要: A thermally expandable composition includes at least one epoxy-functional polymer, at least one endothermic chemical blowing agent, at least one free radical initiator, and at least one guanidine derivative. The invention is also related to a baffle and/or a reinforcement element for hollow structures including the thermally expandable composition, to a process for manufacturing the baffle and/or the reinforcement element, to use of the baffle and/or the reinforcement element for sealing, baffling, or reinforcing of a cavity or a hollow structure, and to a method for sealing, baffling and/or reinforcing a cavity or hollow structure.

    THERMOPLASTIC FOAM WITH CONCOMITANT EXPANSION AND CURING

    公开(公告)号:US20190169392A1

    公开(公告)日:2019-06-06

    申请号:US16324502

    申请日:2017-09-25

    发明人: Dusko PARIPOVIC

    摘要: A thermally expandable composition, includes between 20 and 85 wt.-% of least one thermoplastic polymer P cross-linkable by radical reaction, between 2 and 15 wt.-% of at least one azo radical initiator I, optionally up to 25 wt.-% of at least one adhesion promoter AD, up to 10 wt.-% of at least one tackifier T, up to 2.5 wt.-% of at least one antioxidant AO, and up to 2.5 wt.-% of at least one polyacrylate AC, having a molecular weight of less than 2,500 g/mol, wherein all individual amounts are based on the total composition before expansion. The thermally expandable composition is free of commonly used blowing agents such as azodicarbonamide, but shows excellent properties in terms of expansion stability over a wide temperature range between 120° C. and 200° C. and is especially suitable for baffle and/or reinforcement elements, e.g. in automotive manufacturing.

    THERMALLY EXPANDABLE COMPOSITIONS COMPRISING AN ENDOTHERMIC BLOWING AGENT

    公开(公告)号:US20220372239A1

    公开(公告)日:2022-11-24

    申请号:US17623821

    申请日:2020-08-17

    IPC分类号: C08J9/00 C08L23/08 C08J9/08

    摘要: A thermally expandable composition includes at least one epoxy-functional polymer, at least one endothermic chemical blowing agent, and at least one curative selected from the group made of a urea, urea derivatives, guanidine derivatives, amidine derivatives, and imidazoles. Further, a baffle and/or a reinforcement element for hollow structures includes the thermally expandable composition, a process manufactures the baffle and/or the reinforcement element, the baffle and/or the reinforcement element is used for sealing, baffling, or reinforcing of a cavity or a hollow structure, and a method seals, baffles and/or reinforces a cavity or hollow structure.

    THERMALLY EXPANDABLE COMPOSITIONS COMPRISING A CHEMICAL BLOWING AGENT

    公开(公告)号:US20220372238A1

    公开(公告)日:2022-11-24

    申请号:US17623471

    申请日:2020-08-17

    摘要: A thermally expandable composition which includes at least one thermoplastic polymer, at least one chemical blowing agent, at least one free radical initiator, and at least one co-agent having at least two maleimide groups. The invention is also related to a baffle and/or a reinforcement element for hollow structures including the thermally expandable composition, to a process for manufacturing the baffle and/or the reinforcement element, to use of the baffle and/or the reinforcement element for sealing, baffling, or reinforcing of a cavity or a hollow structure, and to a method for sealing, baffling and/or reinforcing a cavity or hollow structure.

    THERMALLY EXPANDABLE COMPOSITIONS COMPRISING A CHEMICAL BLOWING AGENT

    公开(公告)号:US20220227955A1

    公开(公告)日:2022-07-21

    申请号:US17618119

    申请日:2020-06-12

    IPC分类号: C08J9/10 C08J9/00

    摘要: A thermally expandable composition comprising a thermoplastic polymer compound and/or an elastomer compound, at least one blowing agent including at least one dicarboxylic acid salt of an aminoguanidine compound, optionally at least one free radical initiator and/or a vulcanization system, and at least one guanidine derivative. The invention is also related to baffle and/or a reinforcement element for hollow structures including the thermally expandable composition, to a process for manufacturing the baffle and/or reinforcement element, to use of the baffle and/or reinforcement element for sealing, baffling, or reinforcing of a cavity or a hollow structure, and to a method for sealing, baffling and/or reinforcing a cavity or hollow structure.