Hot melt butyl sealant intermediate
US4112020A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 10, 1977 |
| Grant date | Sep 5, 1978 |
| Priority date | — |
| Expiry date | Aug 10, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2200/0655
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Intermediate compositions useful for the preparation of improved hot melt butyl sealants are obtained by partially grafting a mixture of a butyl rubber, a different elastomer and/or a crystalline polymeric resin, and an elastomeric resin. Preferred compositions are (1) partially grafted mixtures of butyl rubber, epichlorohydrin rubber, and a block copolyester elastomeric resin, (2) partially grafted mixtures of butyl rubber, ethylene-vinyl acetate copolymer, and a block copolyester elastomeric resin, and (3) partially grafted mixtures of butyl rubber, styrene-ethylene-butylene-styrene block copolymer rubber, and a block copolyester elastomeric resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.