Stabilized rosin ester and pressure-sensitive adhesive and hot-melt composition based thereon
US4302371A · kind A · utility
25Cited by
7References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1980 |
| Grant date | Nov 24, 1981 |
| Priority date | — |
| Expiry date | Jul 17, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2666/26
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for preparing a stabilized rosin ester having a higher softening point which comprises subjecting a rosin to disproportionation and purification, and esterifying the resulting purified disproportionated rosin with a tri- or more valent polyhydric alcohol to give a rosin ester having a softening point (according to ring and ball method) of 65.degree. to 140.degree. C. The resulting rosin ester has superior heat resistance and aging resistance as well as a high softening point and is suitably employed as a tackifier for pressure-sensitive adhesive compositions and hot-melt compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.