PET Bottle assemblies produced by using a hot melt adhesive comprising a block copolymer and a tackifying resin
US4212910A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1979 |
| Grant date | Jul 15, 1980 |
| Priority date | — |
| Expiry date | Apr 30, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31801
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
PET bottle assemblies are prepared from a PET bottle which has been blow-molded and joined to a HDPE base cup with a hot melt adhesive which consists essentially of a blend of: (1) a block copolymer selected from the class consisting of: (a) A-B-A block copolymer where A is a monovinyl aromatic hydrocarbon and B is either a conjugated diene or a rubbery mono-olefin and (b) a teleblock copolymer comprising molecules having at least three branches radially branching out from a central hub, each said branch having polystyrene terminal blocks and a butadiene segment in the center; (2) at least one tackifying resin which serves to extend the adhesive properties of the system; (3) at least one stabilizer; and (4) at least one wax or oil diluent. The resultant assemblies are characterized by bonds or joints which possess an unusual combination of excellent low and high temperature adhesion and flexibility as well as high bond strengths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.