申请人:SOLVAY SPECIALTY POLYMERS ITALY S.P.A.
公开号:US10513593B2
公开(公告)日:2019-12-24
The invention pertains to a fluoroelastomer composition comprising:
at least one fluoroelastomer [perfluoroelastomer (A)], said fluoroelastomer (A) comprising iodine and/or bromine atoms and having a backbone comprising:
recurring units derived from tetrafluoroethylene (TFE);
recurring units derived from at least one perfluorinated monomer selected from the group consisting of:
perfluoroalkylvinylethers complying with formula CF2═CFORf1 in which Rn is a C1-C6 perfluoroalkyl (monomers of this type being referred to, herein after, as PAVE), e.g. —CF3, —C2F5, —C3F7;
perfluoro-oxyalkylvinylethers complying with formula CF2═CFOX0, in which X0 can be (i) a C1-C12 perfluorooxyalkyl having one or more ether groups, e.g. —C2F5—O—CF3; or (ii) a group of formula —CF2ORf2 in which Rf2 is a C1-C6 perfluoroalkyl, e.g. —CF3, —C2F5, —C3F7 (monomers of this type being referred to, herein after, as MOVE);
recurring units derived from vinylidene fluoride (VDF) in an amount of up to 30% by moles, with respect to the total moles of recurring units; and
optionally, recurring units derived from at least one perfluorinated C3-C8 alpha-olefin, in an amount of up to 5% moles;
optionally, recurring units derived from at least one fluorine-free alpha-olefin, in an amount of up to 10% moles;
from 0.5 to 5 weight parts, per 100 parts by weight of said fluoroelastomer (A), of at least one polyunsaturated compound;
from 0.1 to 3 weight parts, per 100 parts by weight of said fluoroelastomer (A), of at least one organic peroxide;
from 0.1 to 3 weight parts, per 100 parts by weight of said fluoroelastomer (A), of at least one organic base [base (B)] selected from the group consisting of: (i) non-aromatic primary amines or amides complying with general formula (B1m) or (Bid):
Rbm—[C(O)]t—NH2 (B1m)
H2N—[C(O)]t′—Rdm—[C(O)]t″—NH2 (B1d)
wherein:
each of t, t′ and t″, equal to or different from each other and at each occurrence is zero or 1;
Rbm is a monovalent hydrocarbon non-aromatic group having 12 to 30 carbon atoms;
Rbm is a divalent hydrocarbon non-aromatic group having 6 to 30 carbon atoms; and (ii) cycloaliphatic secondary or tertiary amines complying with general formula (B2m) or (B2d) wherein:
Cy represents a divalent aliphatic group comprising at least 4 carbon atoms, optionally comprising one or more than one ethylenically unsaturated double bond, and optionally comprising one or more catenary nitrogen atoms, forming a cycle with the nitrogen atom which is connected thereto;
Cy′ represent a trivalent aliphatic group comprising at least 5 carbon atoms, optionally comprising one or more than one ethylenically unsaturated double bond, and optionally comprising one or more catenary nitrogen atoms, forming a cycle with the nitrogen atom which is connected thereto.
本发明涉及一种氟弹性体组合物,其中包括
至少一种氟弹性体[全氟弹性体(A)],所述氟弹性体(A)包括碘原子和/或溴原子,其骨架包括
源自四氟乙烯(TFE)的循环单元;
衍生自至少一种全氟单体的递归单元,该单体选自由以下单体组成的组
符合式 CF2═CFORf1 的全氟烷基乙烯基醚,其中 Rn 为 C1-C6 全氟烷基(此类单体在下文中称为 PAVE),如 -CF3、-C2F5、-C3F7;
符合式 CF2═CFOX0 的全氟氧基烷基乙烯基醚,其中 X0 可以是 (i) 具有一个或多个醚基的 C1-C12 全氟氧基烷基,例如 -C2F5-O-CF3;或 (ii) 式 -CF2ORf2 的基团,其中 Rf2 是 C1-C6 全氟烷基,例如 -CF3、-C2F5、-C3F7(此类单体在下文中称为 MOVE);
衍生自偏二氟乙烯(VDF)的递归单元,其摩尔数占递归单元总摩尔数的比例不超过 30%;以及
衍生自至少一种全氟 C3-C8 α-烯烃的递归单元,以摩尔计,含量不超过 5%;
可选地,由至少一种无氟α-烯烃衍生的递归单元,其数量不超过 10%摩尔;
每 100 重量份的所述氟橡胶(A)中,含有 0.5 至 5 重量份的至少一种多不饱和化合物;
每 100 重量份的所述氟橡胶 (A) 中,含有 0.1 至 3 重量份的至少一种有机过氧化物;
(i) 符合通式 (B1m) 或 (Bid) 的非芳香族伯胺或酰胺:
Rbm-[C(O)]t-NH2 (B1m)
H2N-[C(O)]t′-Rdm-[C(O)]t″-NH2 (B1d)
其中
t、t′和 t″中的每一个彼此相等或不同,且每次出现时均为 0 或 1;
Rbm 是具有 12 至 30 个碳原子的单价烃类非芳香基团;
Rbm 是具有 6 至 30 个碳原子的二价烃类非芳香族基团;以及 (ii) 符合通式(B2m)或(B2d)的环脂族仲胺或叔胺,其中
Cy 代表二价脂肪族基团,至少包含 4 个碳原子,可选择包含一个或多个乙烯不饱和双 键,可选择包含一个或多个导管氮原子,与相连的氮原子形成一个循环;
Cy′代表三价脂族基团,至少包含 5 个碳原子,可选择包含一个或多个乙烯不饱和双键,可选择包含一个或多个导氮原子,与相连的氮原子形成一个循环。