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US 6,723,827 B2Granted
Chemically resistant polythioethers and formation thereof
AssigneePBT Brands, Inc.
InventorsJonathan D. Zook, David W. Jordan, Dean M. Willard, George Jones, Michael Cosman
Life of this patent
Estimating the term…
Abstract
A polythioether comprising: wherein R1 is a C1-10 alkyl, —(R3Q)pR3— or C6-C20 aryl where Q is O or S, each R3 is independently C1-6 alkyl, and p is an integer between 0 and 6; R2 is C1-6 alkyloxy or C5-12 cycloalkyloxy, R4 is H, C1-6 alkyl, C1-6 alkyl alcohol and C0-6 alkyl substituted with where X is a halogen, m is an integer between 1 and 4, and n is an integer selected to yield a molecular weight for said polythioether of between 1000 and 10,000 Daltons.
Claims12
A process for forming a polythioether comprising:
- wherein R1 is a C1-10 alkyl, —(R3Q)pR3— or C6-C20 aryl where Q is O or S, each R3 is independently C1-6 alkyl, and p is an integer between 0 and 6;
- R2 is C1-6 alkyloxy or C5-12 cycloalkyloxy, R4 is H, C1-6 alkyl, C1-6 alkyl alcohol and C0-6 alkyl substituted with
- where X is a halogen, m is an integer between 1 and 4, and n is an integer selected to yield a molecular weight for said polythioether of between 1000 and 10,000 Daltons comprising the step of:
- reacting a polythiol and a polyhalide in the presence of an aqueous base.
1 more element
A curable composition comprising:
- 42 to 80 weight percent of a polythioether polymer according to claim 1,
- 0.3 to 15 weight percent of a lightweight filler and 0.1 to 20 weight percent of a curing agent.
Dependencies are inferred from the claim text.