The present invention provides a connector, which may comprise a terminal fitting, a connector housing having a terminal receiving chamber in which the terminal fitting is at least partly disposed, and a waterproof body formed of thermoplastic elastomer composition. The thermoplastic elastomer composition may comprise (A) styrene-based elastomer component and (B) syndiotactic polystyrene-based polymer component. (A) Styrene-based elastomer component may comprise (A1) acid-modified styrene-based elastomer and (A2) unmodified styrene-based elastomer. The mass ratio of (A1) acid-modified styrene-based elastomer to the sum of (A1) acid-modified styrene-based elastomer, and (A2) unmodified styrene-based elastomer (A1/(A1+A2)) may be from 0.9 to 0.1. The mass ratio of the (A) styrene-based elastomer component to (B) syndiotactic polystyrene-based polymer component may be from 60:40 to 90:10.
1. A connector, comprising:
a terminal fitting,
a connector housing having a terminal receiving chamber in which the terminal fitting is at least partly disposed, and
a waterproof body formed of thermoplastic elastomer composition comprising (A) styrene-based elastomer component and (B) syndiotactic polystyrene-based polymer component, wherein (A) styrene-based elastomer component comprises (A1) acid-modified styrene-based elastomer and (A2) unmodified styrene-based elastomer, wherein mass ratio of (A1) acid-modified styrene-based elastomer to the sum of (A1) acid-modified styrene-based elastomer and (A2) unmodified styrene-based elastomer (A1/(A1+A2)) is from 0.9 to 0.1, and wherein the mass ratio of the (A) styrene-based elastomer component to (B) syndiotactic polystyrene-based polymer component is from 60:40 to 90:10.
2. The connector according to claim 1 , wherein the mass ratio of (A1) acid-modified styrene-based elastomer to the sum of (A1) acid-modified styrene-based elastomer and (A2) unmodified styrene-based elastomer (A1/(A1+A2)) is from 0.9 to 0.6.
3. The connector according to claim 1 , wherein (A1) acid-modified styrene-based elastomer is at least one selected from the group consisting of acid-modified styrene-ethylene-propylene block copolymer, acid-modified styrene-ethylene-butylene-styrene block copolymer, acid-modified styrene-ethylene-propylene-styrene block copolymer, and acid-modified styrene-ethylene-ethylene-propylene-styrene block copolymer, and wherein (A2) unmodified styrene-based elastomer is at least one selected from the group consisting of styrene-ethylene-propylene block copolymer, styrene-ethylene-butylene-styrene block copolymer, styrene-ethylene-propylene-styrene block copolymer, and styrene-ethylene-ethylene-propylene-styrene block copolymer.
4. The connector according to claim 3 , wherein (A1) acid-modified styrene-based elastomer is acid-modified styrene-ethylene-butylene-styrene block copolymer, and wherein (A2) unmodified styrene-based elastomer is styrene-ethylene-butylene-styrene block copolymer.
5. The connector according to claim 1 , wherein (A1) acid-modified styrene-based elastomer is maleic acid-modified styrene-based elastomer.
6. The connector according to any of claims 5 , wherein (A1) acid-modified styrene-based elastomer is maleic acid-modified styrene-ethylene-butylene-styrene block copolymer.
7. The connector according to claim 1 , wherein the thermoplastic elastomer composition further comprises 1-10 parts by mass of (C) polyphenylene ether component based on 100 total parts by mass of (A) styrene-based elastomer component and (B) syndiotactic polystyrene-based polymer component.
8. The connector according to claim 7 , wherein (C) polyphenylene ether component is acid-modified polyphenylene ether.
9. The connector according to claim 8 , wherein the acid-modified polyphenylene ether is fumaric acid-modified polyphenylene ether.