IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0328200
(2002-12-23)
|
발명자
/ 주소 |
- Hahn, Bruce Raymond
- Majumdar, Ramendra Nath
|
출원인 / 주소 |
- The Goodyear Tire & Rubber Company
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
6 인용 특허 :
3 |
초록
▼
A black rubber sidewall compound essentially free of a silanated rubber which includes a combination of less than 10 phr of a rosin acid type “tackifier” and less than 1 phr of a t-alkanolamine generates, upon curing against a metal mold surface having a finish in the range from about
A black rubber sidewall compound essentially free of a silanated rubber which includes a combination of less than 10 phr of a rosin acid type “tackifier” and less than 1 phr of a t-alkanolamine generates, upon curing against a metal mold surface having a finish in the range from about 8 RA to 32 RA, a reaction product which, at the surface of the sidewall, has a gloss in the range from about 10 to 40 lasting at least one month. A secondary advantage is that the surface of the mold remains clean enough not to require refurbishing through at least 20% more curing cycles than is possible with a sidewall conventional sidewall compound without the specified tackifier and t-alkanolamine. Multiple washing of the sidewalls during a month of using the tire, fails to diminish the gloss substantially.
대표청구항
▼
1. An uncured tire sidewall composition which comprises a blend of at least one highly unsaturated rubber selected from the group consisting of cis-polybutadiene and natural rubber and optionally a less unsaturated rubber, with process- and performance-enhancing ingredients, and a combination of fro
1. An uncured tire sidewall composition which comprises a blend of at least one highly unsaturated rubber selected from the group consisting of cis-polybutadiene and natural rubber and optionally a less unsaturated rubber, with process- and performance-enhancing ingredients, and a combination of from about 30 phr to 75 phr of reinforcing filler, the major portion by weight of which is carbon black, from about 0.05 to less than 1 phr (part per hundred parts by weight of rubber) of a t-alkanolamine, the alkanol having from 1 to 5 carbon atoms, and from about 0.1 phr to 10 phr of a rosin acid tackifier, the composition when extruded into a strip for a sidewall of a tire, yielding an uncured surface having an 60° Erichsen Pico Glossmeter Model 500 reading of less than 5. 2. The uncured composition of claim 1 including from about 0.1 to 1 phr of a polyalkylene glycol having a molecular weight in the range from about 200 to about 1,000. 3. The uncured composition of claim 2 wherein the blend comprises at least two highly unsaturated rubbers. 4. The uncured composition of claim 2 wherein the highly unsaturated rubber is present in an amount of from about 40 to 60 phr and the less unsaturated rubber is correspondingly present in an amount of from 60 to 40 phr; the tackifier is present in an amount in the range from 3 to 6 phr; and the t-alkanolamine is triethanolamine. 5. The uncured composition of claim 3 wherein the blend comprises cis-polybutadiene and natural rubber and is essentially free of a silanated rubber and fatty acids other than those present in natural rubber. 6. The uncured composition of claim 2 when cured in a curing press against a metal mold having a surface with a finish in the range from 8 RA to 32 RA, yields a cured surface having an 60° Erichsen Pico Glossmeter Model 500 reading in the range from about 10 to 40. 7. A cured tire sidewall compound formed by curing a blend of at least one highly unsaturated rubber selected from the group consisting of cis-polybutadiene and natural rubber, and a halogenated copolymer of an isoolefin and a para-alkylstyrene, with process- and performance-enhancing ingredients including from about 30 phr to 75 phr of reinforcing filler, the major portion by weight of which is carbon black, from about 0.1 phr to 10 phr of a rosin acid type tackifier, and a reaction product of from about 0.05 to less than 1 phr (part per hundred parts by weight of rubber) of a t-alkanolamine, the alkanol having from 1 to 5 carbon atoms, with one or more of the ingredients; the sidewall having a surface which provides a gloss reading in the range from 10 to 40, measured with a 60° Erichsen Pico Glossmeter Model 500, when cured in a curing press against a metal mold having a surface with a finish in the range from 8 RA to 32 RA, and the reading is not substantially diminished for at least four weeks outdoors or three months indoors. 8. The cured sidewall compound of claim 7 wherein the blend includes from about 0.1 to 1 phr of a polyalkylene glycol having a molecular weight in the range from about 200 to about 1,000. 9. The cured sidewall compound of claim 8 wherein the blend comprises at least two highly unsaturated rubbers. 10. The cured sidewall compound of claim 7 wherein the highly unsaturated rubber is present in an amount of from about 40 to 60 phr and the less unsaturated rubber is correspondingly present in an amount of from 60 to 40 phr; and the t-alkanolamine is triethanolamine. 11. The cured sidewall compound of claim 8 wherein the blend comprises cis-polybutadiene and natural rubber and is essentially free of a silanated rubber and fatty acids other than those present in natural rubber. 12. A method for curing a tire with a sidewall having a black high-gloss surface comprising,fabricating the sidewall with a sidewall compound essentially free of a silanated rubber, the sidewall compound comprising from about 30 phr to 75 phr of reinforcing filler, the major portion by weight o f which is carbon black, from about 0.1 phr to 10 phr of a rosin acid type tackifier, a major amount by weight of cis-polybutadiene and a minor amount of natural rubber relative to the other rubbers, to which is added from about 0.05 phr to 0.75 phr of a t-alkanolamine, the alkanol having from 1 to 5 carbon atoms, without adding any fatty acid other than that present in the natural rubber;providing a mold with at least an 8 RA finish for the sidewall;curing the tire at a temperature in the range from about 120° C. to 200° C. at a pressure in the range from about 1480 kPa (200 psig) to 2860 kPa (400 psig) for from 5 min to 15 min.; and,removing a cured tire having a gloss reading in the range from 1 to 40, measured with a 60° Erichsen Pico Glossmeter Model 500. 13. The method of claim 12 wherein the sidewall compound includes from about 0.1 to 1 phr of a polyalkylene glycol having a molecular weight in the range from about 200 to about 1,000.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.