Multi-stage sequentially produced polymer composition
US4173600A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1978 |
| Grant date | Nov 6, 1979 |
| Priority date | — |
| Expiry date | Nov 27, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31924
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A multi-stage sequentially produced polymer structure composition, comprising: an innermost layer (A), and successively seed polymerized thereupon an elastic polymer layer (B), an outermost layer (C) and at least one intermediate layer (D), said layer (A) which has a glass transition temperature (Tg) of at least 10.degree. C. and which constitutes 5-35% by weight of the total polymer composition being the polymerized product of a monomer mixture comprising 51-100 parts by weight of styrene or a styrene derivative, 0-49 parts by weight of a monomer having a copolymerizable double bond, 0-10 parts by weight of a polyfunctional monomer, and 0-5 parts by weight of a graft crosslinking agent; said layer (B) which has a glass transition temperature of 0.degree. C. or less and which constitutes 5-55% by weight of the total polymer composition being the product, polymerized in the presence of a product containing the previously polymerized stages, of a monomer mixture comprising 60-100 parts by weight of a diene monomer, 0-40 parts by weight of a monomer having a copolymerizable double bond, 0-10 parts by weight of a polyfunctional monomer and 0-5 parts by weight of a graft crosslinking ag…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.