Polymeric modifying agents

US6831116B2 · kind B2 · utility

Assignee

• Landec Corporation · US

Inventors

• Steven Bitler · Menlo Park, US
• Ray F. Stewart · Redwood City, US
• Mark A. Wanthal · Redwood Shores, US
• David A. Kamp · Sunnyvale, US
• Paul A. Meyers · Dublin, US
• David Taft · Atherton, US
• Donald A. Schultz · San Jose, US

Key dates

• Filing date: Dec 8, 2000
• Grant date: Dec 14, 2004
• Expiry date: Jun 6, 2022

Classification

• Technology area (CPC H): Electricity
• CPC primary: H05K3/285
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Novel modifying agents contain a sharply-melting crystalline polymer ingredient, preferably a side chain crystalline (SCC) ingredient, and an active chemical ingredient. Such modifying agents, especially when in the form of particles, can be placed in contact with a matrix, will not modify the matrix below the crystalline melting point Tp, but will rapidly modify the matrix above Tp. The active chemical ingredient can react with the matrix, catalyze a reaction of the matrix, or inhibit a reaction of the matrix. Particularly useful compositions are polymer precursors which are storage-stable at low temperatures but which are rapidly converted to crosslinked resins when heated to temperatures above Tp, optionally in the presence of light.